ITB17-030

Classification:
Reference:
RS17-024
Date:
ITB17-030
April 4, 2017
2014-2016 Q50;
OCCUPANT CLASSIFICATION SYSTEM RETROFIT
APPLIED VEHICLES: 2014-2016 Q50 (V37)
2014-2016 Q50 Hybrid (V37)
SERVICE INFORMATION
The information in this bulletin is provided for customers who have concerns with their vehicle’s Occupant
Classification System (OCS) operation after all campaigns have been completed.
Follow the steps in this bulletin to determine if this OCS retrofit procedure is applicable to the vehicle you are
working on.
DETERMINE IF OCS RETROFIT APPLIES
1. Check Service COMM to confirm if OCS reprogramming campaign has been completed
(R1606 / ITB16-018).
Completed:

Write on the repair order the date it was completed and by which dealer.

Go to step 2.
Not Completed:

Complete campaign R1606 / ITB16-018.

No further action needed. OCS retrofit does NOT apply.
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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2. Verify and document the customer’s concern (have the customer demonstrate the concern).
3. Using CONSULT-III plus, check for Airbag or OCS related DTCs.
No Airbag or OCS DTCs: go to step 4.
Airbag or OCS DTCs stored:

Refer to the Electronic Service Manual (ESM), section SRC – SRS Airbag Control System, for
diagnostic and repair information.

OCS retrofit does NOT apply.
4. If all of the following are confirmed:

Campaign R1606 / ITB16-018 has been completed.

Customer concern has been confirmed and documented.

No Airbag or OCS DTCs are stored.
Then
5. Perform the Service Procedure in this bulletin.
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ITB17-030
SERVICE PROCEDURE
WARNING: This procedure involves working under the front passenger seat. The metal seat frame has
sharp edges.
CAUTION: Handle interior trim carefully to avoid damage. Work with clean hands and clean tools to avoid
dirt and stains. Use protective covers as needed.
IMPORTANT: Follow all cautions, warnings, and notes in the Electronic Service Manual (ESM) when
working on or near a Supplemental Restraint System (SRS), such as an air bag or OCS components.
1. Turn the ignition ON, engine OFF/not ready.
2. Record (write down) any customer settings that will be lost when the battery is disconnected.

Refer to the Electronic Service Manual (ESM) section GI General Information, for a listing of systems
that may lose settings or memory when disconnecting the 12V battery.
 Look in the GI section index for ADDITIONAL SERVICE WHEN REMOVING BATTERY
NEGATIVE TERMINAL.
 This list often includes items such as HVAC, power windows, clock, etc.
3. Turn the ignition OFF.
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ITB17-030
4. Remove head restraint from the front passenger seat.
5. Move front passenger seat to the front most position.
6. Disengage rear leg cover fixing pawls, and then
remove rear leg covers.
= Pawl
7. Using hand tools, remove the seat mounting bolts
from the rear of the front passenger seat.
Figure 1
8. Move front passenger seat to the rear most position.
9. Disconnect both battery cables (negative cable first) from the 12 volt battery.

IMPORTANT: On vehicles equipped with Stop/Start System, the 12 volt sub-battery must also be
disconnected, negative cable first.

If needed, refer to the ESM, section PG – Power Supply, Ground & Circuit Elements, for information on
battery disconnection.
10. Wait at least 3 minutes before continuing.
11. Disengage front leg cover fixing pawls, and then
remove front leg covers.
= Pawl
12. Using hand tools, remove the seat mounting bolts
from the front of the front passenger seat.
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Figure 2
ITB17-030
13. Disconnect front passenger seat cushion lower harness connector.
14. Remove the front passenger seat from the vehicle.
15. Set the seat in a clean working area.
16. Remove the seat belt buckle and seat belt buckle harness.

The seat belt buckle is held on with one mounting nut.

The harness is secured with clips on the side of the seat frame and under the seat (see Figures 3 and
4).
Seat belt buckle
harness clip
Seat belt buckle
mounting nut
Figure 3
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ITB17-030
17. From under the front passenger seat, disconnect only the OCS control unit electrical connector, OCS
harness connector, OCS harness clips, seat belt harness connector and seat belt buckle harness clips
shown in Figure 4.
CAUTION: Leave the old OCS harness connected to the 2 OCS sensors until after the drilling procedure is
completed.
18. Remove the OCS control unit.

OCS control unit is held on with 2 bolts.

Do not install the new OCS control unit at this time.
Old seat belt
harness connector.
OCS harness
connector
OCS harness clip
Seat belt buckle
harness clip
OCS control
unit connector
Seat belt buckle
harness clip
Figure 4
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ITB17-030
19. Mark the locations for drilling 2 new upper holes (see Figure 5).
a. Position a straight edge through the center line of the upper holes currently in the seat frame.
b. Mark the center line as indicated by the white dotted line.
c. Measure ¾ inch from the right side of the seat frame (indicated by the yellow line) and in-line with the
white dotted line.
d. Use a center punch to mark where the red line and white dotted line intersect.
e. Measure 1.5 inches from the right side of the seat frame and in-line with the white dotted line.
f.
Use a center punch to mark where the red lines and white dotted line intersect.
1.5 Inches
Upper Holes
Right Side
Center punch
here
Middle Holes
Center punch
here
¾ Inch
Left Side
Lower Holes
Figure 5
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ITB17-030
20. Mark the locations for drilling 1 new middle hole (see Figure 6).
a. Position a straight edge through the center line of the middle holes currently in the seat frame.
b. Mark the center line as indicated by the white dotted line.
c. Measure ¾ inch from the right side of the seat frame (indicated by the yellow line) and in-line with the
white dotted line.
d. Use a center punch to mark where the red line and white dotted line intersect.
Upper Holes
¾ Inch
Right Side
Middle Holes
Center punch
here
Left Side
Lower Holes
Figure 6
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ITB17-030
21. Mark the locations for drilling 1 new lower hole (see Figure 7).
a. Position a straight edge through the center line of the lower holes currently in the seat frame.
b. Mark the center line as indicated by the white dotted line.
c. Measure 2.5 inches from the left side of the seat frame (indicated by the yellow line) and in-line with the
white dotted line.
d. Use a center punch to mark where the red line and white dotted line intersect.
Upper Holes
Right Side
Middle Holes
Left Side
2.5 inches
Lower Holes
Center punch
here
Figure 7
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ITB17-030
22. Using a 13/64” drill bit, drill all 4 center punch locations.

Refer to Figure 8 to verify center punch marks are in correct location where holes are to be drilled.
23. Using a round file, de-burr the drilled holes.
24. Remove the old OCS harness from the OCS sensors.
25. Install the new OCS control unit.

New OCS control unit is listed in the Parts Information.

Install OCS control unit in the original location.

Use original mounting bolts.
26. Apply black touch-up paint to the exposed metal of drilled holes.

Touch-up paint is listed in the Parts Information.
New drilled hole
locations
Figure 8
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ITB17-030
NOTE:

In the next steps you will be replacing the seatbelt buckle and harness and the OCS harness.

Figure 9 shows the old and new parts.

The new seatbelt buckle and OCS harness are listed in the Parts Information.
EXAMPLE
EXAMPLE
New OCS harness and
seat belt buckle are installed
Old OCS harness and seat belt
buckle are removed from the seat.
Notice the new harness and buckle
have a new branch and connector
Figure 9
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ITB17-030
27. Install the new seat belt buckle (see Figure 10).

Seat belt buckle mounting nut torque: 49 N•m (5.0 kg-m, 36 ft-lb).
28. Route the new seat belt buckle harness as shown in Figure 10.

Install only harness clip shown in Figure 10.
Harness clip
Seatbelt mounting nut
Figure 10
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ITB17-030
29. To assist with correct harness routing, first install only the harness connectors shown in Figure 11 in the
following order.
1.
2.
3.
4.
5.
6.
7.
OCS Control unit
Rear OCS sensor
OCS harness
Front OCS sensor
Seat belt buckle harness (Yellow dotted line used to show correct routing)
New branch of seat belt buckle harness
OCS harness to new seat belt buckle harness
5
3
6
7
4
1
2
Figure 11
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ITB17-030
30. Attach all harness clips.

Refer to Figure 12 for clip locations.
Harness clip
Harness clip
Harness clip
Harness clip
Harness clip
Harness clip
Harness clip
Harness clip
Figure 12
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ITB17-030
31. Place front passengers seat into vehicle.
32. Reconnect seat cushion lower harness connector.
33. Install seat mounting bolts at front of passenger front
seat.

Torque front passenger seat front mounting
bolts to: 49 N•m (5.0 kg-m, 36 ft-lb) in order
shown in Figure 13.
34. Install front leg covers.
Figure 13
35. Reconnect battery, positive cable first.

IMPORTANT: On vehicles equipped with Stop/Start System, the 12 volt sub-battery must also be
reconnected, positive cable first.
36. Move seat to front most position.
37. Install seat mounting bolts at rear of passenger front seat.

Torque front passenger seat rear mounting bolts to: 49 N•m (5.0 kg-m, 36 ft-lb) in order shown in
Figure 13.
38. Install rear leg covers.
39. Install head restraint.
40. Reset/reinitialize systems as needed.

Refer to the ESM section, GI General Information, for a listing of systems that require reset/initialization
after reconnecting the 12V battery.
 Look in the GI section index for ADDITIONAL SERVICE WHEN REMOVING BATTERY
NEGATIVE TERMINAL.
 This list often includes items such as HVAC, power windows, clock, etc.
41. Perform Zero Point Reset, using CONSULT III plus, on the next page.
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ITB17-030
Zero Point Reset
1. Prepare the vehicle for OCS zero point reset as follows:

Level the vehicle.

No objects on the passenger seat or in the storage bin.

No occupants in the vehicle – including the servicing technician.

PC is outside of the vehicle on a suitable support.
 Do not set the PC on the vehicle.

Do not touch the vehicle during the OCS zero point reset.

Minimize vibrations of the vehicle.
2. Connect the plus VI to the vehicle.
3. Open / start CONSULT-III plus (C-III plus).
4. Turn the ignition ON, with engine OFF (engine not running/not in ready mode).
5. Wait for the plus VI to be recognized.

The Serial No. will display when the plus VI is recognized.
6. Select Diagnosis (One System).
7. Scroll C-III plus (All systems) and select OCCUPANT DETECTION.
Step 7
Scroll here
Figure 1A
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ITB17-030
8. Select Zero point reset function.
9. Select Start.
Step 8
Step 9
Figure 2A
10. Select Next.
Step 10
Figure 3A
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ITB17-030
11. Select Start and then proceed to step 12.

After selecting Start, if Figure 5A is displayed:
a. Check the OCS control unit and confirm that harness connector is completely seated.
b. Turn the ignition OFF and then restart procedure from step 4 on page 16.
Step 11
Figure 4A
Figure 5A
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ITB17-030
12. Zero point reset will display “EXECUTING”.
Figure 6A
13. When finished, "Completed" will display next to “Current status”.

Select End and then proceed to step 14.
Figure 7A
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Step 13
ITB17-030
14. Turn the ignition OFF and then back ON and observe the air bag warning light and front passenger airbag
status light:

The air bag warning light

The front passenger airbag status light
should illuminate for 7 seconds and then either stay
illuminated or go out depending on the occupation of the front passenger seat.
should illuminate for 7 seconds and then go out.
Front Passenger Airbag Status Light Operation
CONDITION
DESCRIPTION
Empty
Empty front passenger seat
Bag or Child or Child Restraint or
Small Adult in the front passenger
seat
Adult in front passenger seat
Nobody/Somebody
Adult
PASSENGER AIR BAG
INDICATOR LIGHT
ON (illuminated)
FRONT PASSENGER
AIR BAG STATUS
INHIBITED
ON (illuminated)
INHIBITED
OFF (dark)
ACTIVATED
NOTE: If the air bag warning light or the front passenger airbag status light does not operate as
described above there may be an issue not covered by this bulletin. Refer to ASIST and the
appropriate Service Manual for additional diagnostic and repair information.
15. Provide the customer with a printed copy of FRONT PASSENGER AIR BAG STATUS LIGHT OPERATION
(see last page).
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ITB17-030
PARTS INFORMATION
DESCRIPTION
PART NUMBER
QUANTITY
Controller Assy-Occupant Sensor
(OCS Control Unit)
98856 - 4GW0A
1
Seatbelt Buckle – Black/Charcoal
86842 - 4HK5A
Seatbelt Buckle – Beige/Tan
86842 - 4HK5B
Seatbelt Buckle – Gray
86842 - 4HK5C
OCS Harness
98854 - 4GW0A
1
External Automotive Touch-Up Paint - Black
Local Source (1)
See EXPENSE CODE
1
(1) External automotive touch-up paint is available at many auto parts supply stores.
CLAIMS INFORMATION
Submit a Primary Part (PP) type claim using the following claims coding:
DESCRIPTION
PFP
OP CODE
SYM
DIA
FRT
Perform OCS Retrofit
(1)
RX5NAA
ZE
32
1.0
(1) Reference the Parts Information Table and use the applicable Occupant Sensor Controller Assembly part
number as the Primary Failed Part (PFP).
EXPENSE CODE
EXPENSE CODE
041
DESCRIPTION
Touch Up Paint
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MAXIMUM AMOUNT
$2.00
ITB17-030
FRONT PASSENGER AIR BAG STATUS LIGHT OPERATION
NOTE: Please print this page and place a copy in the vehicle.
The front passenger seat is equipped with an occupant classification
sensor (weight sensor) that turns the front passenger air bag on or off
depending on the weight applied to the front passenger seat. The status
of the front passenger air bag (ON or OFF) is indicated by the front
passenger air bag status light
which is located on the instrument
panel. After the ignition switch is placed in the “ON” position, the front
passenger air bag status light on the instrument panel illuminates for
about 7 seconds and then turns off or remains illuminated depending on
the front passenger seat occupied status. The light operates as follows:
CONDITION
DESCRIPTION
Empty
Empty front passenger seat
Nobody/Somebody
Adult
Bag or Child or Child Restraint or
Small Adult in the front passenger
seat
Adult in front passenger seat
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PASSENGER AIR BAG
INDICATOR LIGHT
ON (illuminated)
FRONT PASSENGER
AIR BAG STATUS
INHIBITED
ON (illuminated)
INHIBITED
OFF (dark)
ACTIVATED
ITB17-030