ITB20-029

Classification:
Reference:
Date:
ST20-003
ITB20-029
December 22, 2020
2017-2020 Q50; STEERING FEELS LIGHT OR SENSITIVE
APPLIED VEHICLES:
2017-2020 Q50 (V37)
APPLIED SYSTEM:
Steering - Vehicles without Direct Adaptive Steering (DAS)
IF YOU CONFIRM
The client states the steering feels light or sensitive,
AND
There are no EPS DTCs stored.
ACTION
1. Confirm the current power steering control module part number.
2. Reprogram the power steering control module, if applicable.
IMPORTANT: The purpose of ACTION (above) is to give you a quick idea of the work you will be performing.
You MUST closely follow the entire SERVICE PROCEDURE as it contains information that is essential to
successfully completing this repair.
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 retailer to determine if this
applies to your vehicle.
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SERVICE PROCEDURE
IMPORTANT: Before starting, make sure:

ASIST on the CONSULT PC has been synchronized (updated) to the current date.

All C-III plus software updates (if any) have been installed.
NOTE: The CONSULT PC automatically gets applicable reprogramming data during ASIST
synchronization.

A screen print for warranty documentation can be done from the CONSULT PC during this process
while still connected to the vehicle.

The CONSULT PC is connected to the internet via a cable or Wi-Fi.
 Later in the procedure you will be required to enter your username and password.
 The CONSULT PC must be connected to the Internet.
 If you do not know your username and password, contact your service manager.
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1.
Connect the Vehicle Interface (VI) to the vehicle.
Make sure the VI is securly connected. If the VI connection is loose during reprogramming, the
process will be interrupted and the control module may be damaged.
2.
Connect the AC Adapter to the CONSULT PC.
Be sure to connect the AC Adapter. If the CONSULT PC battery voltage drops during
reprogramming, the process will be interrupted and the control module may be damaged.
3.
Connect a battery maintainer or smart charger set to reflash mode or a similar setting.
To avoid damage to the control module, ensure the vehicle’s battery voltage remains between 12.0V
and 15.5V during reprogramming.
4.
Turn OFF all external Bluetooth® devices (e.g., cell phones, printers, etc.) within range of the CONSULT
PC and the VI.
Make sure to turn OFF all external Bluetooth® devices. If Bluetooth® signal waves are within range of
the CONSULT PC and the VI during reprogramming, reprogramming may be interrupted and the
control module may be damaged.
5.
Turn the ignition ON with the engine OFF.

The engine must not start or run during the reprogramming procedure.
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6.
Turn OFF all vehicle electrical loads such as exterior lights, interior lights, HVAC, blower, rear defogger,
audio, NAVI, seat heater, steering wheel heater, etc.
7.
Turn the hazard warning lamps ON.
8.
Turn ON the CONSULT PC.
9.
Start C-III plus.
10.
Wait for the VI to be recognized.

The serial number will display when the VI is recognized.
VI is
recognized
Figure 1
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11.
Select Diagnosis (All Systems).
Figure 2
12.
Check for DTCs.

If there are any DTCs other than EPS/DAST 3 DTCs; diagnose, perform repairs, and erase DTCs
before continuing.

If no DTCs are stored, continue to step 13 on page 6.
NO DTC
Figure 3
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13.
Return to the home screen, select Home and then Yes.
Figure 4
14.
Select Re/programming, Configuration.
Figure 5
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15.
Use the arrows (if needed) to view and read all precautions.
16.
Check the box confirming the precautions have been read.
17.
Select Next.
Figure 6
18.
If the screen in Figure 7 displays, select Automatic Selection(VIN).

If the screen in Figure 7 does not display, skip to step 19 on page 8.
Example
Figure 7
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19.
Make sure VIN or Chassis # matches the VIN.
20.
If the correct VIN is displayed, select Confirm.
Figure 8
21.
Select Confirm.
Figure 9
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22.
Select EPS/DAST 3.
Figure 10
23.
Select Reprogramming.
Figure 11
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24.
When you get to the screen shown in Figure 12, confirm reprogramming is needed as follows:
a. Find the power steering control module Part Number and write it on the repair order.
HINT: This is the current part number (P/N).
Figure 12
b. Compare the P/N you wrote down to the numbers in the Current Power Steering Control Module
Part Number column in Table A below.

If there is a match, continue to step 25.

If there is not a match, this bulletin does not apply. Return to ASIST for further diagnostic and repair
information.
Table A
MODEL
2017-2020
Q50 (V37)
25.
DRIVETRAIN
Current Power Steering Control Module Part Number: 28504 -
2WD
6HL5A, 6HL6A
AWD
6HL7A
Select Save (Figure 12).
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26.
Use arrows (if needed) to view and real all precautions.
27.
Check the box confirming the precautions have been read.
28.
Select Next.
Figure 13
29.
Read the Current Part Number and the Part Number After Repro/programming. They should be
different.
30.
Select Next.
These numbers
should be different
Figure 14
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IMPORTANT: If you get the screen shown in Figure 15 and it is blank (no reprogramming listed), it means there
is no matching power steering control module reprogramming available for this vehicle (power steering control
module reprogram is not needed). Return to ASIST for further diagnostic and repair information.
EPS/DAST3
xxxxx-xxxxx
xxxxx-xxxxx
xxxxxxxxxxxxxxxxxxxx
xxxxx-xxxxx
xxxxx-xxxxx
xxxxxxxxxxxxxxxxxxxxx
Figure 15
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31.
Make sure OK is highlighted green (battery voltage must be between 12.0 and 15.5 volts).
32.
Select Next.
To avoid damage to the control module, ensure the vehicle’s battery voltage remains between 12.0V and
15.5V during reprogramming.
Monitor battery
voltage here
Figure 16
33.
Make sure OK is highlighted green for all items under Judgement, then select Start.
Example
Figure 17
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34.
Select USA/CANADA Dealers.
35.
Select OK.

Figure 18 may not display if the CONSULT PC has remained ON since the last reprogramming.

Figure 19 may display if the CONSULT PC is not connected to the internet.
Figure 18
Figure 19
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36.
Enter Username and Password.

Before reprogramming will start, you will be required to enter your username and password.

The CONSULT PC must be connected to the Internet (Wi-Fi or cable).
 If you do not know your username and password, contact your service manager.
Figure 20
37.
Select Submit.

There will be a short pause while the username and password are authenticated.

Once authentication completes, power steering control module reprogramming will automatically
begin and the screen in Figure 21 on page 16 will be displayed.
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38.
Wait for both progress bars to complete.

When the screen in Figure 22 displays, the reprogramming is complete. Continue to step 39.

If the screen in Figure 22 does not display (indicating that reprogramming did not complete), refer to
the information on the next page.
Figure 21
Figure 22
39.
Disconnect the battery maintainer or smart charger from the vehicle.
40.
Select Next and continue to step 41 on page 18.
HINT: Additional steps on page 18 are required before C-III plus will provide the final reprogramming
confirmation report.
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If reprogramming does not complete and the “!?” symbol displays as shown in Figure 23:

Check battery voltage (12.0-15.5V).

Ignition is ON.

External Bluetooth® devices are OFF.

All electrical loads are OFF.

Select Retry and follow the on-screen
instructions.
 Retry may not go through on the
first attempt and can be selected
more than once.

Do not disconnect the VI or shut down
C-III plus if reprogramming does not
complete.

Check battery voltage (12.0-15.5V).

CONSULT A/C adapter is plugged in.

Ignition is ON.

Transmission is in Park.

All C-III 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 23
Figure 24
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41.
Erase All DTCs as follows:
a. Turn the ignition OFF.
b. Turn the ignition ON.
c. Wait for DTC erase to complete.
Turn ignition ON > OFF > ON
Figure 25
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42.
Verify the before and after part numbers are different.
43.
Print a copy of this screen (Figure 26) and attach it to the repair order for warranty documentation.
NOTE: If you cannot print the screen below:
a. Select Screen Capture.
b. Name the file.
c. Save the file in My Documents.
 A copy of the screen is now saved in the CONSULT PC. It can be retrieved and printed at a
later time.
44.
Select Confirm.
Figure 26
45.
Close C-III plus.
46.
Turn the ignition OFF.
47.
Disconnect the VI from the vehicle.
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CLAIMS INFORMATION
Submit a Primary Operation (PO) type line claim using the following claims coding:
DESCRIPTION
OP CODE
SYM
DIA
FRT
Reprogram power steering control module
RX9MAA
ZE
32
0.5
AMENDMENT HISTORY
PUBLISHED DATE
REFERENCE
December 22, 2020
ITB20-029
DESCRIPTION
Original bulletin published
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