ITB-14-009

CSC-10054744-1200
OWNER LETTER (typical owner letter)
Dear Infiniti Q50 Owner:
Infiniti is committed to providing the highest levels of product safety, quality and customer satisfaction. With
that in mind, we want to bring to your attention important information regarding a voluntary service campaign to
update the Direct Adaptive Steering™ (DAS) system on your vehicle.
REASON FOR SERVICE CAMPAIGN
In certain conditions such as freezing outside temperatures or a drop in battery charge at startup, the current
DAS system software calibration may switch the system to a manual steering mode that requires a noticeable
increase in steering effort and illuminates one or more error messages on the vehicle information display. To
help prevent this from occurring, Infiniti will update the DAS software and recalibrate the system.
WHAT INFINITI WILL DO
To ensure your continued satisfaction and confidence in your Q50, your authorized Infiniti retailer will perform a
DAS system diagnostic check, software update, and recalibration. In certain instances, your Infiniti retailer may
need to replace the DAS control units. All services will be performed at no cost to you for parts or labor.
This service should take approximately 2 hours to complete, but your Infiniti retailer may require your vehicle for
a longer period of time based upon their work schedule.
WHAT YOU SHOULD DO
Please contact your Infiniti retailer at your earliest convenience in order to set an appointment to have your
vehicle upgraded at no expense to you. Please bring this notice with you to your service appointment. We
understand your time is valuable so your retailer will work with you to make the update as convenient as
possible.
Thank you for your cooperation and we are indeed sorry for any inconvenience this may cause you.
Should you have any questions, our representatives would be pleased to assist you.
 Call 1-800-662-6200 or
 Visit http://www.infinitiusa.com
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SB-10054744-1223
Reference:
Date:
ITB14-009a
January 27, 2014
VOLUNTARY SERVICE CAMPAIGN
2014 Q50; DIRECT ADAPTIVE STEERING SYSTEM
CONTROL MODULE REPLACE, REPROGRAM, AND RECALIBRATE
The Claims Information and Figure R1 in this bulletin have been amended. No other changes have been made.
Please discard previous versions of this bulletin.
CAMPAIGN ID #:
P4204
APPLIED VEHICLES: 2014 Q50 Hybrid (V37)
Check Service COMM to confirm campaign eligibility.
 There are four bulletins with different campaign ID numbers for this campaign.
 Each bulletin is applicable to specific vehicles depending on vehicle options.
 Make sure the correct bulletin (Campaign ID #) is being used.
INTRODUCTION
Infiniti is conducting a Voluntary Service Campaign on certain specific Model Year 2014 Q50 Hybrid vehicles to
replace and reprogram the Direct Adaptive Steering (DAST) control modules, and recalibrate the DAST system.
This Service will be performed at no cost to the customer for parts or labor.
IDENTIFICATION NUMBER
Infiniti has assigned identification number P4204 to this campaign. This number must appear on all
communication and documentation of any nature dealing with this campaign.
DEALER RESPONSIBILITY
Dealers are to correct each vehicle falling within the range of this campaign that enters the service department.
This includes vehicles purchased from private parties or presented by transient (tourist) owners and vehicles in
a dealer’s inventory.
Infiniti Bulletins are intended for use by qualified technicians, not 'do-it-yourselfers'. Qualified technicians are properly trained
individuals who have the equipment, tools, safety instruction, and know-how to do a job properly and safely. NOTE: If you believe
that a described condition may apply to a particular vehicle, DO NOT assume that it does. See your Infiniti dealer to determine if this
applies to your vehicle.
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Repair Overview
Check Service Comm to confirm the vehicle you are working on
requires campaign ID # P4204.
The Service Procedure has 5 parts:
PART 1: Replace all Three DAST Control Modules, page 3:
 DAST 1 - Steering Angle Main Control Module
 DAST 2 - Steering Angle Sub Control Module
 EPS/DAST 3 - Steering Force Control Module
PART 2: Configure all Three DAST Control Modules, page 4:
 This must be performed 3 separate times to configure DAST
1, DAST 2, and EPS/DAST 3.
PART 3: Reprogramming Procedure, page 10:
 This includes three separate control module reprograms;
DAST 1, DAST 2, and EPS/DAST 3.
PART 4: Calibration and Confirmation Procedure, page 26:
 This includes the following: DAST CALIBRATION (MODE1),
ADJUST STEERING ANGLE SENSOR NEUTRAL
POSITION, Self-Diagnosis Check, and Confirmation of
EPS/DAST 3 ANGLE 1.
PART 5: Calibrate AVM Camera, page 33:
END
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SERVICE PROCEDURE
PART 1: Replace all Three DAST Control Modules.
1. Replace all three DAST Control Modules (see Figure R1):
DAST 1 - Steering Angle Main Control Module.
 For R&R information, refer to the Service Manual > Section STC > Direct Adaptive Steering > Steering
Angle Main Control Module.
DAST 2 - Steering Angle Sub Control Module.
 For R&R information, refer to the Service Manual > Section STC > Direct Adaptive Steering > Steering
Angle Sub Control Module.
NOTE: The washer bottle does not need to be removed. Suspend it with string while replacing DAST 2
control module.
EPS/DAST 3 - Steering Force Control Module.
 For R&R information, refer to the Service Manual > Section STC > Direct Adaptive Steering > Steering
Force Control Module.
A = EPS/DAST 3 - Steering Force Control Module
B = DAST 2 - Steering Angle Sub Control Module
C = DAST 1 - Steering Angle Main Control Module
Figure R1
2. After all three DAST Control Modules are replaced; go to PART 2: Configure all Three DAST Control
Modules on the next page.
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PART 2: Configure all Three DAST Control Modules
NOTE: PART 2 must be performed 3 separate times to configure the control modules for DAST 1, DAST 2,
and EPS/DAST 3.
1. Connect CONSULT III plus (C-III plus) VI to the vehicle.
2. Turn the ignition ON (engine OFF / not Ready).
3. Turn ON the CONSULT PC.
4. Open C-III plus and wait for the VI to be recognized.
5. Select Re/programming, Configuration.
Plus VI is
recognized
Step
5
Figure A1
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6. Check the box for Confirmed Instructions, and then select Next.
Step
6
Figure A2
7. Select Q50 or Q50 Hybrid and 2014, or Automatic Selection(VIN).

If Automatic Selection (VIN) is selected, or the screen in Figure 3 does no display, skip to step 9.
8. Select Select.
This works,
too
Step
7
Step
8
Figure A3
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9. Verify the VIN or Chassis # matches that of the vehicle.

If the correct VIN is displayed, select Confirm.
Verify
here
If OK, select
Confirm
Figure A4
10. Select Confirm again.
Step
10
Figure A5
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11. Use the page arrows to scroll and select the correct control module for configuration.
Make sure to configure the control modules in this order:
DAST 1, then DAST 2, and then EPS/DAST 3
NOTE: DAST 1 and DAST 2 are shown in Figure A6; EPS/DAST 3 is not shown.
Step
11
Scroll with
arrows
Figure A6
12. Select Manual Configuration.
Step
12
Figure A7
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13. Select (highlight) the correct DATA PART NO. (Use the scroll arrows as needed.)
 Use the table below to determine the correct DATA PART NO.
14. Select Next.
Step 13:
Select correct
number
Examples
Step
14
Figure A8
DATA PART NO.
AWD
2WD
With
Without
Active Lane Control
Active Lane Control
Q50 Hybrid
2WD
With
Active Lane Control
AWD
Without
Active Lane Control
DAST1
28505 4GF3E
28505 4GF4A
28505 4GF4B
28505 4GF4C
DAST2
28505 4GF8E
28505 4GF9A
28505 4GF9B
28505 4GF9C
EPS/DAST3
285H0 4GF3E
285H0 4GF4A
285H0 4GF4B
285H0 4GF4C
NOTE: Vehicles with Active Lane Control will have a Lane Camera Unit mounted above the inside rearview
mirror.
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15. Confirm the DATA PART NO. is correct.
16. Select OK.
Step
15
Step
16
Figure A9
17. Wait for Transfer Data (Write Configuration) to complete.
18. Select END.
Step
18
Figure A10
19. Repeat the configuration procedure in the correct order; DAST 2 (2nd) and then EPS/DAST 3 (3rd).
20. After all 3 DAST control modules have been configured, go to PART 3: Reprogramming Procedure on
the next page.
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PART 3: Reprogramming Procedure
NOTE: PART 3 must be performed 3 separate times to reprogram the control modules for DAST 1, DAST
2, and EPS/DAST 3.
1. Before continuing, it is IMPORTANT to make sure:

ASIST on the CONSULT PC has been synchronized (updated) with the current date.

All CONSULT related software updates (if any) have been installed.
NOTE: The CONSULT PC automatically gets all reprogramming software during ASIST
synchronization.
CAUTION:

Connect the GR8 to the vehicle 12 volt battery and set to ECM power supply mode.
If the vehicle battery voltage drops below 12.0V or rises above 13.5V during reprogramming,
the DAST may be damaged.

Be sure to turn OFF all vehicle electrical loads.
If a vehicle electrical load remains ON, the DAST may be damaged.

Be sure to connect the AC Adapter.
If the CONSULT PC battery voltage drops during reprogramming, the process will be interrupted
and the DAST may be damaged.

Turn off all external Bluetooth® devices (e.g., cell phones, printers, etc.) within range of the
CONSULT PC and the VI. If Bluetooth® signal waves are within range of the CONSULT PC
during reprogramming, reprogramming may be interrupted and the DAST may be damaged.
2. Once all ASIST and CONSULT related updates have been performed, attach the CONSULT PC to the
vehicle.

Connect the plus VI to the CONSULT PC with the USB cable.

Connect the AC adapter to the CONSULT PC.
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3. Turn ON the CONSULT PC, and then open CONSULT III plus (C-III plus).
NOTE: Make sure all applications other than C-III plus are closed.
4. Turn the ignition ON (engine OFF / not Ready).
 Press the ignition switch twice without depressing the brake pedal.

The meter and gauges will illuminate.
CAUTION: Do Not start the engine, the DAST may be damaged. (For Hybrid vehicles, make sure the
Ready light is OFF.)
NOTE: Make sure ALL accessories are turned OFF.
5. Erase all stored DTCs as follows:
a.
b.
c.
d.
Wait for the plus VI to be recognized.
Select Diagnosis (All Systems) and Confirm.
Wait for system call to complete.
Erase all DTCs.
6. Go to Re/programming, Configuration.
a. Select the Home button, and then select YES to return to the screen shown in Figure 1.
b. select Re/programming, Configuration.
Plus VI is
recognized
Step
5b
Step
6b
Figure 1
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7. Check the box for Confirmed Instructions, and then select Next.
Step
7
Figure 2
8. Select Q50 or Q50 Hybrid and 2014, or Automatic Selection(VIN).

If Automatic Selection (VIN) is selected, or the screen in Figure 3 does no display, skip to step 10.
9. Select Select.
This works,
too
Step
8
Step
9
Figure 3
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10. Verify the VIN or Chassis # matches that of the vehicle.

If the correct VIN is displayed, select Confirm.
Verify
here
If OK, select
Confirm
Figure 4
11. Select Confirm again.
Step
11
Figure 5
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12. Use the page arrows to scroll and select the correct control module to be reprogrammed.
Make sure to reprogram the control modules in this order:
DAST 1, then DAST 2, and then EPS/DAST 3
NOTE: DAST 1 and DAST 2 are shown in Figure 6; EPS/DAST 3 is not shown.
Step
12
Scroll with
arrows
Figure 6
13. Wait for System Call to complete, and then select Reprogramming.
Step
13
Figure 7
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14. When you get to the screen shown in Figure 8, confirm reprogramming applies as follows:
A. Find the DAST Part Number and write it on the repair order.
NOTE: This is the current DAST Part Number. DAST 1 is shown; DAST 2 and DAST 3 are similar.
Current Part
Number
If a match,
select Save
Figure 8
B. Compare the P/N you wrote down to the numbers in the Current Part Number column of Table A
below:

If there is a match, reprogramming applies. Continue with the reprogramming procedure.

If there is not a match, reprogramming does not apply.
NOTE: If there is no match for DAST 1, there will be no match for DAST 2 or DAST 3. You can
stop. This reprogramming does not apply, or it has already been done.
Table A
MODEL
2014 Q50/Q50 Hybrid
CONTROL MODULE
CURRENT PART NUMBER:
DAST 1
28505 – 4GA1B, 4GA1C, 4GA1D
DAST 2
EPS/DAST 3
28505 – 4GA6B, 4GA6C, 4GA6D
285H0 – 4GA5B, 4GA5C, 4GA5D
C. If there is a part number match as specified above, Select Save, and then continue with the
reprogramming procedure on the next page.
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15. Read the precautions on the C-III plus screen (use page arrow as needed). After reading, select
Confirmed instructions, and then select Next.
Step
15
Figure 9
NOTE:
 In some cases, more than one new P/N for reprogramming is available.
 If more then one P/N is available, the screen in Figure 10 will display.
 Select and use the reprogramming option that does not have the message “Caution! Use ONLY
with ITBXX-XXX”.

If you get this screen and it is blank (no reprogramming listed), it means there is no reprogramming
available for that control module.
DAST 1
Figure 10
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16. Verify the Current Part Number matches the Part Number written down in step 14, and then select Next.
Verify P/Ns
above, then
select Next
Figure 11
17. If the screen in Figure 12 appears, first select Delete, then Confirm, and then Other Operation.

This will erase the Saved Data List and restart the reprogram from step 12. You must go back
to step 12.

If no Saved Data List is stored, Figure 13 on the next page will be displayed.
Step
17
Figure 12
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18. Confirm battery voltage is correct, and then select Next.
NOTE: Battery voltage must stay within the specified range to make the indicator turn green.
Monitor 12V
battery voltage
here
Must be
“Green” before
selecting Next
Step
18
Figure 13
19. With battery voltage OK (green), select Start.
 The reprogramming process begins when Start is selected.
NOTE: For reprogramming to continue, vehicle 12V battery voltage must stay within 12 volts and 13.5
volts.
Monitor 12V
battery voltage
here
Step
19
Figure 14
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IMPORTANT: Until the reprogramming has completed:

Do not disconnect the USB cable, although the following message appears:
“Disconnecting CONSULT and VI is Available”


Do not touch the Home button until instructed to.
When the plus VI is transferring the reprogram to the DAST control module, do not disconnect the
plus VI from the vehicle even if the PC freezes.
If you need to disconnect the plus VI, first check the LED on the plus VI body to confirm that the
communication from the plus VI to the vehicle has completed and the LED for the vehicle icon is
OFF.
If you accidentally disconnect the VI during program writing to the vehicle, the DAST control
module that is being reprogrammed may need to be replaced refer to Control Unit Recovery on the
next page.


20. Wait for both bar graphs to complete.
Figure 15
Possible errors that may rarely occur:



If the progress bar freezes at 90% of a complete transfer to the plus VI and error code “12-1-1NR” is
displayed as shown in Figure 16 on the next page, turn the ignition OFF, then ON, and then refer to
Control Unit Recovery on the next page.
If the progress bar freezes at 90% more than 3 times “on the same DAST control module” but without
Error Code “12-1-1NR”, replace only the DAST control module that is currently being reprogrammed,
and then reprogram to the most current software.
If the reprogramming does not complete, refer to Control Unit Recovery on the next page.
NOTE: If a DAST control module replacement is required:
 Refer to the appropriate section of the ESM for the procedure to replace and configure a DAST
control module.
 Make sure to write the correct configuration to the new control module.
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Control Unit Recovery:
Do not disconnect plus VI or shut down Consult III plus if reprogramming does not complete.
If reprogramming does not complete and the “!?” icon displays as shown in Figure 16:

Check battery voltage
(12.0–13.5 V).

Ignition is ON, engine OFF (not
READY).

External Bluetooth® devices are
OFF.

All electrical loads are OFF.

Select retry and follow the on
screen instructions.

Select Retry if Error
Code 12-1-1-NR is
present.
“Retry” may not go through on the
first attempt and can be selected
more than once.
Figure 16
If reprogramming does not complete and the “X” icon displays as shown in Figure 17:

Check battery voltage
(12.0 – 13.5 V).

CONSULT A/C adapter is plugged
in.

Ignition is ON, engine OFF (not
READY).

Transmission is in Park.

All C-III plus / plus VI cables are
securely connected.

All C-III plus updates are installed.

Select Home, and then restart
the reprogram procedure from
the beginning.
Figure 17
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21. When the screen in Figure 18 appears, reprogramming is complete.
22. Select Next.
23. Wait for System Call to complete.
Step
22
Figure 18
24. Erase all DTCs as follows:
a. Turn the ignition OFF.

The screen in Figure 19 will read OFF after pressing the power switch once.
Turn ignition switch OFF position
ON to
OFF
OFF
Figure 19
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b. Turn the ignition ON (engine OFF / Not Ready).

The screen in Figure 19 will read ON after pressing the power switch twice.
NOTE: Do not be confused by any screen messages. At this point, simply turn the ignition ON.
OFF to
ON
Figure 20
c. Wait for the bar graph in the ERASE window to complete 100%.
d. Select Next.
Step
24c
Step
24d
Figure 21
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25. Verify the part number has changed (before and after reprogramming part numbers should be different).
a. Print a copy of the screen in Figure 22 by selecting Print.
b. Attach the copy to the repair order.
c. Once a copy has been printed, select Confirm.
Step
25
Step
25a
Step
25c
Figure 22
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26. After Confirmation has completed, select Home.
Step
26
Figure 23
27. Repeat the entire reprogramming procedure for DAST 2.
28. Repeat the entire reprogramming procedure for EPS/DAST 3.
After all three reprograms (DAST 1, DAST 2, and EPS/DAST 3) are complete, go to step 29 on the next
page.
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29. Check for DTCs in DAST 1, DAST 2, and EPS/DAST 3.
a. Open C-III plus, and then select Diagnosis (All Systems) and Confirm.
b. Wait for system call to complete.
c. Check for stored DTCs.

If no DTCs are stored, go to PART 4 on the next page.

If C13C0 or C13C2 are stored in DAST 1 or DAST 2, go to DAST DTCs on page 33.

If DTC C13F2 is stored in DAST 1, DAST 2, or DAST 3 as current:
 Then, at least one of the DAST control modules did not complete the reprogramming correctly.
 Perform reprogramming again for the DAST control module that Does Not have this code.

If only DTCs other then the ones listed above are stored, erase DTCs and go to PART 4 on the
next page.
NOTE: If a DAST control module replacement is required:

Refer to the appropriate section of the ESM for the procedure to replace and configure a DAST
control module.

Make sure to write the correct configuration to the new control module.
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PART 4: Calibration and Confirmation Procedures
NOTE: PART 4 includes the following:
 DAST CALIBRATION (MODE1)
 ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION
 Self-Diagnosis Check
 Confirmation of EPS/DAST 3 ANGLE 1
DAST CALIBRATION (MODE1)
CAUTION:

Never move the vehicle during DAST CALIBRATION (MODE1) because the steering gear is held
in a neutral position until the ignition switch is turned OFF.

Never rotate the steering wheel more than 120 degrees just after DAST CALIBRATION (MODE1)
has been completed because the spiral cable will be damaged.
WARNING: Be careful of moving parts. The steering wheel and front wheels will move automatically by
themselves after starting DAST CALIBRATION (MODE1).
Before starting Calibration Mode1:

Place the vehicle on an alignment rack and then remove the pins from the turn tables so they are
allowed to move freely, or place the vehicle on a lift so that the tires do not touch the ground.

Place the steering wheel tilt to the highest level.

Connect a battery charger to the vehicle battery set to a low charge rate.
NOTE: This calibration procedure will be performed twice completely through.
IMPORTANT: Do Not turn the ignition OFF at the end of the second time through.
1. Make sure the plus VI is still connected to the vehicle and to the CONSULT PC with the USB cable.
2. Make sure the AC adapter is still connected to the CONSULT PC.
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3. Turn the ignition ON (engine OFF / Not Ready).

IMPORTANT: Do Not start the engine (for Hybrid models the READY light must be OFF).
4. Turn ON the CONSULT PC, and then open C-III plus (if not already open).
5. On the C-III plus screen, select Diagnosis (All Systems). After system call has completed, select
EPS/DAST 3 >> Work support >> DAST CALIBRATION (MODE1). See Figure 24.
Step
5
Step
6
Figure 24
6. Select START, and then START a second time to begin DAST CALIBRATION (MODE1).

Do not rotate the road wheels during the DAST calibration.
WARNING: Be careful of moving parts. The steering wheel and front wheels will move automatically by
themselves after starting DAST CALIBRATION (MODE1).
NOTE: If DAST CALIBRATION (MODE1) will not start, refer to DAST DTCs on page 33.
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7. When Auto steering has completed, center the steering wheel to the neutral (straight ahead) position, and
then select Start again (see Figure 25).
IMPORTANT: The steering wheel must be positioned in the neutral (straight ahead) position, for step 7
above, to ensure that the steering wheel will be centered when driving straight.
CAUTION: When DAST CALIBRATION (MODE1) has completed, the steering wheel is disconnected from
the steering gear and the force feedback of the steering is reduced. Never turn the steering wheel
beyond 120 degrees otherwise the spiral cable will be damaged.
Step
7
Figure 25
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8. Select End.
Step
8
Figure 26
9. Turn the ignition switch OFF.
10. With the C-III plus still connected, repeat steps 1-8 a second time, but Do Not turn the ignition OFF after
step 8, and then proceed to step 11.
11. Select the BACK button twice, and then select Yes to “Delete results”.

After system call completes, proceed to ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL
POSITION on the next page.
IMPORTANT: Do Not turn the ignition OFF.

If the ignition is turned OFF between the DAST CALIBRATION (MODE1) and ADJUSTMENT OF
STEERING ANGLE SENSOR NEUTRAL POSITION, the procedure for DAST CALIBRATION
(MODE1) must be started over from step 1.
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ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION
1. With C-III plus in Diagnosis (All Systems), select ABS >> Work support >> ST ANGLE SENSOR
ADJUSTMENT, and then select START.
2. When the message “Waiting for your operation…” is displayed, select Start.
IMPORTANT: Do Not touch the steering wheel while adjusting steering angle sensor.
Step
2
Step
3
Figure 27
3. When the message COMPLETE is shown (after approx. 5 seconds), select End.
4. Turn the ignition switch OFF and wait at least 10 seconds.
5. Disconnect the battery charger from the vehicle 12V battery.
6. Go to Self-Diagnosis Check on the next page.
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SELF-DIAGNOSIS Check
1. Start the engine or place in READY mode (turn ignition ON with brake pressed).
2. Check for DTCs in DAST 1, DAST 2, and EPS/DAST 3 as follows:
A. On C-III plus, return to the Home screen.
B. Select Diagnosis (All Systems), and then select Confirm.
C. Wait for system call to complete.
D. Check for stored DTCs.

If no DTCs are stored, go to CONFIRMATION of EPS/DAST 3 ANGLE 1 on the next page.

If DTCs C13E9-00, C13EB-00, and/or C13F0-00 are stored:
a. Erase all DTCs.
b. Change the steering wheel tilt to a slightly lower position.
c. Perform DAST CALIBRATION (MODE1) again.
d. Perform SELF-DIAGNOSIS Check again.
e. Repeat a – d above until no DTCs are stored.
f.
Go to CONFIRMATION of EPS/DAST 3 ANGLE 1 on the next page.
IMPORTANT: Do Not drive the vehicle.
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CONFIRMATION of EPS/DAST 3 ANGLE 1
NOTE: At this point the ignition should still be ON with the engine running or the READY light ON.
1. With C-III plus in Diagnosis (All Systems), select EPS/DAST 3 >> DATA MONITOR >> ANGLE 1,and
then check the value of ANGLE 1 (see Figure 28).

ANGLE 1 should be within the standard value shown below.

If ANGLE 1 is not within the standard value:
a. Change the steering wheel tilt to a slightly lower position.
b. Perform DAST CALIBRATION (MODE1) again.
c. Perform CONFIRMATION of EPS/DAST 3 ANGLE 1 again.
d. Repeat a – c above until ANGLE 1 is within the standard value.
Monitor item
ANGLE 1
Standard value
between -4.4 and 4.4
Step
1
Figure 28
3. Go to PART 5: Calibrate AVM Camera Image on the next page.
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PART 5: Calibrate AVM Camera Image
1. Perform the procedure for AVM Camera Calibration.
 Refer to the Service Manual > Section AV (Audio, Visual & Navigation System) > Calibration Camera
Image (Around View Monitor).
DAST DTCs
NOTE: Perform the following steps only if:
 DTCs are stored for DAST 1 and/or DAST 2.
 DAST CALIBRATION (MODE1) will not start.
1. Check DTCs for DAST 1.

If C13C0 and C13C2 are detected as current on DAST 1, replace the control module for DAST 2.

If DTCs can not be read (DAST 1 is not listed), go to step 2 and check DTCs for DAST 2.
2. Check DTCs for DAST 2.

If C13C0 and C13C2 are detected as current on DAST 2, replace the control module for DAST 1.

If DTCs can not be read (DAST 2 is not listed), turn the ignition switch OFF and then back ON. Then go
back to Check DTCs for DAST 1 (step 1) again.
 If step 1 and step 2 are repeated more than 5 times and there is still no DTCs stored/listed, replace
the control module for DAST 3.
NOTE: If a DAST control module replacement is required:


Refer to the appropriate section of the ESM for the procedure to replace and configure a DAST
control module.
Make sure to write the correct configuration to the new control module.
INFORMATION: If DTCs, other than the ones listed above, are stored and will not erase; do the following:
a.
b.
c.
d.
e.
Turn the ignition OFF.
Disconnect the 12V battery negative cable.
Wait 5 minutes.
Reconnect the negative battery cable.
Return to where you were in the Service Procedure.
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ITB14-009a
PARTS INFORMATION
DESCRIPTION
DAST 1 Control Module
(Steering Angle Main Control Module)
DAST 2 Control Module
(Steering Angle Sub Control Module)
EPS/DAST 3 Control Module
(Steering Force Control Module)
PART #
QUANTITY
28505 - 4GA1J
1
28505 - 4GA6J
1
285H0 - 4GA5J
1
CLAIMS INFORMATION
Submit a Campaign (CM) line claim using the following claims coding:
CAMPAIGN (“CM”) I.D.
P4204
DESCRIPTION
DAST Replace Modules, Reprogram,
Recalibrate, & Adjust AVM
34/35
OP CODE
FRT
P42043
3.4 hrs
ITB14-009a
OWNER LETTER (typical owner letter)
Dear Infiniti Q50 Owner:
Infiniti is committed to providing the highest levels of product safety, quality and customer satisfaction. With
that in mind, we want to bring to your attention important information regarding a voluntary service campaign to
update the Direct Adaptive Steering™ (DAS) system on your vehicle.
REASON FOR SERVICE CAMPAIGN
In certain conditions such as freezing outside temperatures or a drop in battery charge at startup, the current
DAS system software calibration may switch the system to a manual steering mode that requires a noticeable
increase in steering effort and illuminates one or more error messages on the vehicle information display. To
help prevent this from occurring, Infiniti will update the DAS software and recalibrate the system.
WHAT INFINITI WILL DO
To ensure your continued satisfaction and confidence in your Q50, your authorized Infiniti retailer will perform a
DAS system diagnostic check, software update, and recalibration. In certain instances, your Infiniti retailer may
need to replace the DAS control units. All services will be performed at no cost to you for parts or labor.
This service should take approximately 2 hours to complete, but your Infiniti retailer may require your vehicle for
a longer period of time based upon their work schedule.
WHAT YOU SHOULD DO
Please contact your Infiniti retailer at your earliest convenience in order to set an appointment to have your
vehicle upgraded at no expense to you. Please bring this notice with you to your service appointment. We
understand your time is valuable so your retailer will work with you to make the update as convenient as
possible.
Thank you for your cooperation and we are indeed sorry for any inconvenience this may cause you.
Should you have any questions, our representatives would be pleased to assist you.
 Call 1-800-662-6200 or
 Visit http://www.infinitiusa.com
35/35
ITB14-009a

SB-10054744-9300
Reference:
Date:
ITB14-009
January 24, 2014
VOLUNTARY SERVICE CAMPAIGN
2014 Q50; DIRECT ADAPTIVE STEERING SYSTEM
CONTROL MODULE REPLACEMENT, REPROGRAM, AND CALIBRATION
CAMPAIGN ID #:
P4204
APPLIED VEHICLES: 2014 Q50 Hybrid (V37)
Check Service COMM to confirm campaign eligibility.
 There are four bulletins with different campaign ID numbers for this campaign.
 Each bulletin is applicable to specific vehicles depending on vehicle options.
 Make sure the correct bulletin (Campaign ID #) is being used.
INTRODUCTION
Infiniti is conducting a Voluntary Service Campaign on certain specific Model Year 2014 Q50 Hybrid vehicles to
replace and reprogram the Direct Adaptive Steering System (DAST) control modules, and recalibrate the DAST
system. This Service will be performed at no cost to the customer for parts or labor.
IDENTIFICATION NUMBER
Infiniti has assigned identification number P4204 to this campaign. This number must appear on all
communication and documentation of any nature dealing with this campaign.
DEALER RESPONSIBILITY
Dealers are to correct each vehicle falling within the range of this campaign that enters the service department.
This includes vehicles purchased from private parties or presented by transient (tourist) owners and vehicles in
a dealer’s inventory.
Infiniti Bulletins are intended for use by qualified technicians, not 'do-it-yourselfers'. Qualified technicians are properly trained
individuals who have the equipment, tools, safety instruction, and know-how to do a job properly and safely. NOTE: If you believe
that a described condition may apply to a particular vehicle, DO NOT assume that it does. See your Infiniti dealer to determine if this
applies to your vehicle.
1/35
Repair Overview
Check Service Comm to confirm the vehicle you are working on
requires campaign ID # P4204.
The Service Procedure has 5 parts:
PART 1: Replace all three DAST control modules, page 3:
 DAST 1 - Steering Angle Main Control Module
 DAST 2 - Steering Angle Sub Control Module
 EPS/DAST 3 - Steering Force Control Module
PART 2: Configure all three DAST control modules, page 4:
 This must be performed 3 separate times to configure DAST
1, DAST 2, and EPS/DAST 3.
PART 3: Reprogramming Procedure, page 10:
 This includes three separate control module reprograms;
DAST 1, DAST 2, and EPS/DAST 3.
PART 4: Calibration and Confirmation Procedure, page 26:
 This includes the following: DAST CALIBRATION (MODE1),
ADJUST STEERING ANGLE SENSOR NEUTRAL
POSITION, Self-Diagnosis Check, and Confirmation of
EPS/DAST 3 ANGLE 1.
PART 5: Calibrate AVM Camera, page 33:
END
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ITB14-009
SERVICE PROCEDURE
PART 1: Replace all three DAST control modules.
1. Replace all three DAST Control Modules (see Figure R1):
DAST 1 - Steering Angle Main Control Module.
 For R&R information, refer to the Service Manual > Section STC > Direct Adaptive Steering > Steering
Angle Main Control Module.
DAST 2 - Steering Angle Sub Control Module.
 For R&R information, refer to the Service Manual > Section STC > Direct Adaptive Steering > Steering
Angle Sub Control Module.
NOTE: The wash bottle does not need to be removed. Suspend it with string while replacing DAST 2
control module.
EPS/DAST 3 - Steering Force Control Module.
 For R&R information, refer to the Service Manual > Section STC > Direct Adaptive Steering > Steering
Force Control Module.
A = EPS/DAST 3 - Steering Force Control Module
B = DAST 1 - Steering Angle Main Control Module.
C = DAST 2 - Steering Angle Sub Control Module
Figure R1
2. After all three DAST Control Modules are replaced, go to PART 2: Configure all Three DAST Control
Modules on the next page.
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ITB14-009
PART 2: Configure all Three DAST Control Modules
NOTE: PART 2 must be performed 3 separate times to configure the control modules for DAST 1, DAST 2,
and EPS/DAST 3.
1. Connect CONSULT III plus (C-III plus) VI to the vehicle.
2. Turn the ignition ON (engine OFF / not Ready).
3. Turn ON the CONSULT PC.
4. Open C-III plus and wait for the VI to be recognized.
5. Select Re/programming, Configuration.
Plus VI is
recognized
Step
5
Figure A1
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ITB14-009
6. Check the box for Confirmed Instructions, and then select Next.
Step
6
Figure A2
7. Select Q50 or Q50 Hybrid and 2014, or Automatic Selection(VIN).

If Automatic Selection (VIN) is selected, or the screen in Figure 3 does no display, skip to step 9.
8. Select Select.
This works,
too
Step
7
Step
8
Figure A3
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ITB14-009
9. Verify the VIN or Chassis # matches that of the vehicle.

If the correct VIN is displayed, select Confirm.
Verify
here
If OK, select
Confirm
Figure A4
10. Select Confirm again.
Step
10
Figure A5
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ITB14-009
11. Use the page arrows to scroll and select the correct control module for configuration.
Make sure to configure the control modules in this order:
DAST 1, then DAST 2, and then EPS/DAST 3
NOTE: DAST 1 and DAST 2 are shown in Figure A6; EPS/DAST 3 is not shown.
Step
11
Scroll with
arrows
Figure A6
12. Select Manual Configuration.
Step
12
Figure A7
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ITB14-009
13. Select (highlight) the correct DATA PART NO. (Use the scroll arrows as needed.)
 Use the table below to determine the correct DATA PART NO.
14. Select Next.
Step 13:
Select correct
number
Examples
Step
14
Figure A8
DATA PART NO.
AWD
2WD
With
Without
Active Lane Control
Active Lane Control
Q50 Hybrid
2WD
With
Active Lane Control
AWD
Without
Active Lane Control
DAST1
28505 4GF3E
28505 4GF4A
28505 4GF4B
28505 4GF4C
DAST2
28505 4GF8E
28505 4GF9A
28505 4GF9B
28505 4GF9C
EPS/DAST3
285H0 4GF3E
285H0 4GF4A
285H0 4GF4B
285H0 4GF4C
NOTE: Vehicles with Active Lane Control will have a Lane Camera Unit mounted above the inside rearview
mirror.
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ITB14-009
15. Confirm the DATA PART NO. is correct.
16. Select OK.
Step
15
Step
16
Figure A9
17. Wait for Transfer Data (Write Configuration) to complete.
18. Select END.
Step
18
Figure A10
19. Repeat the Configuration procedure in the correct order; DAST 2 (2nd) and then EPS/DAST 3 (3rd).
20. After all 3 DAST control modules have been configured, go to PART 3: Reprogramming Procedure on
the next page.
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ITB14-009
PART 3: Reprogramming Procedure
NOTE: PART 3 must be performed 3 separate times to reprogram the control modules for DAST 1, DAST
2, and EPS/DAST 3.
1. Before continuing, it is IMPORTANT to make sure:

ASIST on the CONSULT PC has been synchronized (updated) with the current date.

All CONSULT related software updates (if any) have been installed.
NOTE: The CONSULT PC automatically gets all reprogramming software during ASIST
synchronization.
CAUTION:

Connect the GR8 to the vehicle 12 volt battery and set to ECM power supply mode.
If the vehicle battery voltage drops below 12.0V or rises above 13.5V during reprogramming,
the DAST may be damaged.

Be sure to turn OFF all vehicle electrical loads.
If a vehicle electrical load remains ON, the DAST may be damaged.

Be sure to connect the AC Adapter.
If the CONSULT PC battery voltage drops during reprogramming, the process will be interrupted
and the DAST may be damaged.

Turn off all external Bluetooth® devices (e.g., cell phones, printers, etc.) within range of the
CONSULT PC and the VI. If Bluetooth® signal waves are within range of the CONSULT PC
during reprogramming, reprogramming may be interrupted and the DAST may be damaged.
2. Once all ASIST and CONSULT related updates have been performed, attach the CONSULT PC to the
vehicle.

Connect the plus VI to the CONSULT PC with the USB cable.

Connect the AC adapter to the CONSULT PC.
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ITB14-009
3. Turn ON the CONSULT PC, and then open CONSULT III plus (C-III plus).
NOTE: Make sure all applications other than C-III plus are closed.
4. Turn the ignition ON (engine OFF / not Ready).
 Press the ignition switch twice without depressing the brake pedal.

The meter and gauges will illuminate.
CAUTION: Do Not start the engine, the DAST may be damaged. (For Hybrid vehicles, make sure the
Ready light is OFF.)
NOTE: Make sure ALL accessories are turned OFF.
5. Erase all stored DTCs as follows:
a.
b.
c.
d.
Wait for the plus VI to be recognized.
Select Diagnosis (All Systems) and Confirm.
Wait for system call to complete.
Erase all DTCs.
6. Go to Re/programming, Configuration.
a. Select the Home button, and then select YES to return to the screen shown in Figure 1.
b. select Re/programming, Configuration.
Plus VI is
recognized
Step
5b
Step
6b
Figure 1
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ITB14-009
7. Check the box for Confirmed Instructions, and then select Next.
Step
7
Figure 2
8. Select Q50 or Q50 Hybrid and 2014, or Automatic Selection(VIN).

If Automatic Selection (VIN) is selected, or the screen in Figure 3 does no display, skip to step 10.
9. Select Select.
This works,
too
Step
8
Step
9
Figure 3
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ITB14-009
10. Verify the VIN or Chassis # matches that of the vehicle.

If the correct VIN is displayed, select Confirm.
Verify
here
If OK, select
Confirm
Figure 4
11. Select Confirm again.
Step
11
Figure 5
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ITB14-009
12. Use the page arrows to scroll and select the correct control module to be reprogrammed.
Make sure to reprogram the control modules in this order:
DAST 1, then DAST 2, and then EPS/DAST 3
NOTE: DAST 1 and DAST 2 are shown in Figure 6; EPS/DAST 3 is not shown.
Step
12
Scroll with
arrows
Figure 6
13. Wait for System Call to complete, and then select Reprogramming.
Step
13
Figure 7
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ITB14-009
14. When you get to the screen shown in Figure 8, confirm reprogramming applies as follows:
A. Find the DAST Part Number and write it on the repair order.
NOTE: This is the current DAST Part Number. DAST 1 is shown; DAST 2 and DAST 3 are similar.
Current Part
Number
If a match,
select Save
Figure 8
B. Compare the P/N you wrote down to the numbers in the Current Part Number column of Table A
below:

If there is a match, reprogramming applies. Continue with the reprogramming procedure.

If there is not a match, reprogramming does not apply.
NOTE: If there is no match for DAST 1, there will be no match for DAST 2 or DAST 3. You can
stop. This reprogramming does not apply, or it has already been done.
Table A
MODEL
2014 Q50/Q50 Hybrid
CONTROL MODULE
CURRENT PART NUMBER:
DAST 1
28505 – 4GA1B, 4GA1C, 4GA1D
DAST 2
EPS/DAST 3
28505 – 4GA6B, 4GA6C, 4GA6D
285H0 – 4GA5B, 4GA5C, 4GA5D
C. If there is a part number match as specified above, Select Save, and then continue with the
reprogramming procedure on the next page.
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ITB14-009
15. Read the precautions on the C-III plus screen (use page arrow as needed). After reading, select
Confirmed instructions, and then select Next.
Step
15
Figure 9
NOTE:
 In some cases, more than one new P/N for reprogramming is available.
 If more then one P/N is available, the screen in Figure 10 will display.
 Select and use the reprogramming option that does not have the message “Caution! Use ONLY
with ITBXX-XXX”.

If you get this screen and it is blank (no reprogramming listed), it means there is no reprogramming
available for that control module.
DAST 1
Figure 10
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ITB14-009
16. Verify the Current Part Number matches the Part Number written down in step 14, and then select Next.
Verify P/Ns
above, then
select Next
Figure 11
17. If the screen in Figure 12 appears, first select Delete, then Confirm, and then Other Operation.

This will erase the Saved Data List and restart the reprogram from step 12. You must go back
to step 12.

If no Saved Data List is stored, Figure 13 on the next page will be displayed.
Step
17
Figure 12
17/35
ITB14-009
18. Confirm battery voltage is correct, and then select Next.
NOTE: Battery voltage must stay within the specified range to make the indicator turn green.
Monitor 12V
battery voltage
here
Must be
“Green” before
selecting Next
Step
18
Figure 13
19. With battery voltage OK (green), select Start.
 The reprogramming process begins when Start is selected.
NOTE: For reprogramming to continue, vehicle 12V battery voltage must stay within 12 volts and 13.5
volts.
Monitor 12V
battery voltage
here
Step
19
Figure 14
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ITB14-009
IMPORTANT: Until the reprogramming has completed:

Do not disconnect the USB cable, although the following message appears:
“Disconnecting CONSULT and VI is Available”


Do not touch the Home button until instructed to.
When the plus VI is transferring the reprogram to the DAST control module, do not disconnect the
plus VI from the vehicle even if the PC freezes.
If you need to disconnect the plus VI, first check the LED on the plus VI body to confirm that the
communication from the plus VI to the vehicle has completed and the LED for the vehicle icon is
OFF.
If you accidentally disconnect the VI during program writing to the vehicle, the DAST control
module that is being reprogrammed may need to be replaced refer to Control Unit Recovery on the
next page.


20. Wait for both bar graphs to complete.
Figure 15
Possible errors that may rarely occur:



If the progress bar freezes at 90% of a complete transfer to the plus VI and error code “12-1-1NR” is
displayed as shown in Figure 16 on the next page, turn the ignition OFF, then ON, and then refer to
Control Unit Recovery on the next page.
If the progress bar freezes at 90% more than 3 times “on the same DAST control module” but without
Error Code “12-1-1NR”, replace only the DAST control module that is currently being reprogrammed,
and then reprogram to the most current software.
If the reprogramming does not complete, refer to Control Unit Recovery on the next page.
NOTE: If a DAST control module replacement is required:
 Refer to the appropriate section of the ESM for the procedure to replace and configure a DAST
control module.
 Make sure to write the correct configuration to the new control module.
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ITB14-009
Control Unit Recovery:
Do not disconnect plus VI or shut down Consult III plus if reprogramming does not complete.
If reprogramming does not complete and the “!?” icon displays as shown in Figure 16:

Check battery voltage
(12.0–13.5 V).

Ignition is ON, engine OFF (not
READY).

External Bluetooth® devices are
OFF.

All electrical loads are OFF.

Select retry and follow the on
screen instructions.

Select Retry if Error
Code 12-1-1-NR is
present.
“Retry” may not go through on the
first attempt and can be selected
more than once.
Figure 16
If reprogramming does not complete and the “X” icon displays as shown in Figure 17:

Check battery voltage
(12.0 – 13.5 V).

CONSULT A/C adapter is plugged
in.

Ignition is ON, engine OFF (not
READY).

Transmission is in Park.

All C-III plus / plus VI cables are
securely connected.

All C-III plus updates are installed.

Select Home, and then restart
the reprogram procedure from
the beginning.
Figure 17
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ITB14-009
21. When the screen in Figure 18 appears, reprogramming is complete.
22. Select Next.
23. Wait for System Call to complete.
Step
22
Figure 18
24. Erase all DTCs as follows:
a. Turn the ignition OFF.

The screen in Figure 19 will read OFF after pressing the power switch once.
Turn ignition switch OFF position
ON to
OFF
OFF
Figure 19
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ITB14-009
b. Turn the ignition ON (engine OFF / Not Ready).

The screen in Figure 19 will read ON after pressing the power switch twice.
NOTE: Do not be confused by any screen messages. At this point, simply turn the ignition ON.
OFF to
ON
Figure 20
c. Wait for the bar graph in the ERASE window to complete 100%.
d. Select Next.
Step
24c
Step
24d
Figure 21
22/35
ITB14-009
25. Verify the part number has changed (before and after reprogramming part numbers should be different).
a. Print a copy of the screen in Figure 22 by selecting Print.
b. Attach the copy to the repair order.
c. Once a copy has been printed, select Confirm.
Step
25
Step
25a
Step
25c
Figure 22
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ITB14-009
26. After Confirmation has completed, select Home.
Step
26
Figure 23
27. Repeat the entire reprogramming procedure for DAST 2.
28. Repeat the entire reprogramming procedure for EPS/DAST 3.
After all three reprograms (DAST 1, DAST 2, and EPS/DAST 3) are complete, go to step 29 on the next
page.
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ITB14-009
29. Check for DTCs in DAST 1, DAST 2, and EPS/DAST 3.
a. Open C-III plus, and then select Diagnosis (All Systems) and Confirm.
b. Wait for system call to complete.
c. Check for stored DTCs.

If no DTCs are stored, go to PART 4 on the next page.

If C13C0 or C13C2 are stored in DAST 1 or DAST 2, go to DAST DTCs on page 33.

If DTC C13F2 is stored in DAST 1, DAST 2, or DAST 3 as current:
 Then, at least one of the DAST control modules did not complete the reprogramming correctly.
 Perform reprogramming again for the DAST control module that Does Not have this code.

If only DTCs other then the ones listed above are stored, erase DTCs and go to PART 4 on the
next page.
NOTE: If a DAST control module replacement is required:

Refer to the appropriate section of the ESM for the procedure to replace and configure a DAST
control module.

Make sure to write the correct configuration to the new control module.
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ITB14-009
PART 4: Calibration and Confirmation Procedures
NOTE: PART 4 includes the following:
 DAST CALIBRATION (MODE1)
 ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION
 Self-Diagnosis Check
 Confirmation of EPS/DAST 3 ANGLE 1
DAST CALIBRATION (MODE1)
CAUTION:

Never move the vehicle during DAST CALIBRATION (MODE1) because the steering gear is held
in a neutral position until the ignition switch is turned OFF.

Never rotate the steering wheel more than 120 degrees just after DAST CALIBRATION (MODE1)
has been completed because the spiral cable will be damaged.
WARNING: Be careful of moving parts. The steering wheel and front wheels will move automatically by
themselves after starting DAST CALIBRATION (MODE1).
Before starting Calibration Mode1:

Place the vehicle on an alignment rack and then remove the pins from the turn tables so they are
allowed to move freely, or place the vehicle on a lift so that the tires do not touch the ground.

Place the steering wheel tilt to the highest level.

Connect a battery charger to the vehicle battery set to a low charge rate.
NOTE: This calibration procedure will be performed twice completely through.
IMPORTANT: Do Not turn the ignition OFF at the end of the second time through.
1. Make sure the plus VI is still connected to the vehicle and to the CONSULT PC with the USB cable.
2. Make sure the AC adapter is still connected to the CONSULT PC.
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ITB14-009
3. Turn the ignition ON (engine OFF / Not Ready).

IMPORTANT: Do Not start the engine (for Hybrid models the READY light must be OFF).
4. Turn ON the CONSULT PC, and then open C-III plus (if not already open).
5. On the C-III plus screen, select Diagnosis (All Systems). After system call has completed, select
EPS/DAST 3 >> Work support >> DAST CALIBRATION (MODE1). See Figure 24.
Step
5
Step
6
Figure 24
6. Select START, and then START a second time to begin DAST CALIBRATION (MODE1).

Do not rotate the road wheels during the DAST calibration.
WARNING: Be careful of moving parts. The steering wheel and front wheels will move automatically by
themselves after starting DAST CALIBRATION (MODE1).
NOTE: If DAST CALIBRATION (MODE1) will not start, refer to DAST DTCs on page 33.
27/35
ITB14-009
7. When Auto steering has completed, center the steering wheel to the neutral (straight ahead) position, and
then select Start again (see Figure 25).
IMPORTANT: The steering wheel must be positioned in the neutral (straight ahead) position, for step 7
above, to ensure that the steering wheel will be centered when driving straight.
CAUTION: When DAST CALIBRATION (MODE1) has completed, the steering wheel is disconnected from
the steering gear and the force feedback of the steering is reduced. Never turn the steering wheel
beyond 120 degrees otherwise the spiral cable will be damaged.
Step
7
Figure 25
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ITB14-009
8. Select End.
Step
8
Figure 26
9. Turn the ignition switch OFF.
10. With the C-III plus still connected, repeat steps 1-8 a second time, but Do Not turn the ignition OFF after
step 8, and then proceed to step 11.
11. Select the BACK button twice, and then select Yes to “Delete results”.

After system call completes, proceed to ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL
POSITION on the next page.
IMPORTANT: Do Not turn the ignition OFF.

If the ignition is turned OFF between the DAST CALIBRATION (MODE1) and ADJUSTMENT OF
STEERING ANGLE SENSOR NEUTRAL POSITION, the procedure for DAST CALIBRATION
(MODE1) must be started over from step 1.
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ITB14-009
ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION
1. With C-III plus in Diagnosis (All Systems), select ABS >> Work support >> ST ANGLE SENSOR
ADJUSTMENT, and then select START.
2. When the message “Waiting for your operation…” is displayed, select Start.
IMPORTANT: Do Not touch the steering wheel while adjusting steering angle sensor.
Step
2
Step
3
Figure 27
3. When the message COMPLETE is shown (after approx. 5 seconds), select End.
4. Turn the ignition switch OFF and wait at least 10 seconds.
5. Disconnect the battery charger from the vehicle 12V battery.
6. Go to Self-Diagnosis Check on the next page.
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ITB14-009
SELF-DIAGNOSIS Check
1. Start the engine or place in READY mode (turn ignition ON with brake pressed).
2. Check for DTCs in DAST 1, DAST 2, and EPS/DAST 3 as follows:
A. On C-III plus, return to the Home screen.
B. Select Diagnosis (All Systems), and then select Confirm.
C. Wait for system call to complete.
D. Check for stored DTCs.

If no DTCs are stored, go to CONFIRMATION of EPS/DAST 3 ANGLE 1 on the next page.

If DTCs C13E9-00, C13EB-00, and/or C13F0-00 are stored:
a. Erase all DTCs.
b. Change the steering wheel tilt to a slightly lower position.
c. Perform DAST CALIBRATION (MODE1) again.
d. Perform SELF-DIAGNOSIS Check again.
e. Repeat a – d above until no DTCs are stored.
f.
Go to CONFIRMATION of EPS/DAST 3 ANGLE 1 on the next page.
IMPORTANT: Do Not drive the vehicle.
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CONFIRMATION of EPS/DAST 3 ANGLE 1
NOTE: At this point the ignition should still be ON with the engine running or the READY light ON.
1. With C-III plus in Diagnosis (All Systems), select EPS/DAST 3 >> DATA MONITOR >> ANGLE 1,and
then check the value of ANGLE 1 (see Figure 28).

ANGLE 1 should be within the standard value shown below.

If ANGLE 1 is not within the standard value:
a. Change the steering wheel tilt to a slightly lower position.
b. Perform DAST CALIBRATION (MODE1) again.
c. Perform CONFIRMATION of EPS/DAST 3 ANGLE 1 again.
d. Repeat a – c above until ANGLE 1 is within the standard value.
Monitor item
ANGLE 1
Standard value
between -4.4 and 4.4
Step
1
Figure 28
3. Go to PART 5: Calibrate AVM Camera Image on the next page.
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PART 5: Calibrate AVM Camera Image
1. Perform the procedure for AVM Camera Calibration.
 Refer to the Service Manual > Section AV (Audio, Visual & Navigation System) > Calibration Camera
Image (Around View Monitor).
DAST DTCs
NOTE: Perform the following steps only if:
 DTCs are stored for DAST 1 and/or DAST 2.
 DAST CALIBRATION (MODE1) will not start.
1. Check DTCs for DAST 1.

If C13C0 and C13C2 are detected as current on DAST 1, replace the control module for DAST 2.

If DTCs can not be read (DAST 1 is not listed), go to step 2 and check DTCs for DAST 2.
2. Check DTCs for DAST 2.

If C13C0 and C13C2 are detected as current on DAST 2, replace the control module for DAST 1.

If DTCs can not be read (DAST 2 is not listed), turn the ignition switch OFF and then back ON. Then go
back to Check DTCs for DAST 1 (step 1) again.
 If step 1 and step 2 are repeated more than 5 times and there is still no DTCs stored/listed, replace
the control module for DAST 3.
NOTE: If a DAST control module replacement is required:


Refer to the appropriate section of the ESM for the procedure to replace and configure a DAST
control module.
Make sure to write the correct configuration to the new control module.
INFORMATION: If DTCs, other than the ones listed above, are stored and will not erase; do the following:
a.
b.
c.
d.
e.
Turn the ignition OFF.
Disconnect the 12V battery negative cable.
Wait 5 minutes.
Reconnect the negative battery cable.
Return to where you were in the Service Procedure.
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PARTS INFORMATION
DESCRIPTION
DAST 1 Control Module
(Steering Angle Main Control Module)
DAST 2 Control Module
(Steering Angle Sub Control Module)
EPS/DAST 3 Control Module
(Steering Force Control Module)
PART #
QUANTITY
28505 - 4GA1J
1
28505 - 4GA6J
1
285H0 - 4GA5J
1
CLAIMS INFORMATION
Submit a Campaign (CM) line claim using the following claims coding:
CAMPAIGN (“CM”) I.D.
P4204
DESCRIPTION
DAST Replace Modules, Reprogram,
Recalibrate, & Adjust AVM
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OP CODE
FRT
P42040
3.4 hrs
ITB14-009
OWNER LETTER (typical owner letter)
Dear Infiniti Q50 Owner:
Infiniti is committed to providing the highest levels of product safety, quality and customer satisfaction. With
that in mind, we want to bring to your attention important information regarding a voluntary service campaign to
update the Direct Adaptive Steering™ (DAS) system on your vehicle.
REASON FOR SERVICE CAMPAIGN
In certain conditions such as freezing outside temperatures or a drop in battery charge at startup, the current
DAS system software calibration may switch the system to a manual steering mode that requires a noticeable
increase in steering effort and illuminates one or more error messages on the vehicle information display. To
help prevent this from occurring, Infiniti will update the DAS software and recalibrate the system.
WHAT INFINITI WILL DO
To ensure your continued satisfaction and confidence in your Q50, your authorized Infiniti retailer will perform a
DAS system diagnostic check, software update, and recalibration. In certain instances, your Infiniti retailer may
need to replace the DAS control units. All services will be performed at no cost to you for parts or labor.
This service should take approximately 2 hours to complete, but your Infiniti retailer may require your vehicle for
a longer period of time based upon their work schedule.
WHAT YOU SHOULD DO
Please contact your Infiniti retailer at your earliest convenience in order to set an appointment to have your
vehicle upgraded at no expense to you. Please bring this notice with you to your service appointment. We
understand your time is valuable so your retailer will work with you to make the update as convenient as
possible.
Thank you for your cooperation and we are indeed sorry for any inconvenience this may cause you.
Should you have any questions, our representatives would be pleased to assist you.
 Call 1-800-662-6200 or
 Visit http://www.infinitiusa.com
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