NTB17-059b

Classification:
RS17-014b
Reference:
Date:
NTB17-059b
August 25, 2017
2013 – 2016 SENTRA;
OCCUPANT CLASSIFICATION SYSTEM RETROFIT
This bulletin has been amended. Pages 19 and 21 have been revised.
No other changes have been made. Please discard all previous versions of this bulletin.
APPLIED VEHICLES:
2013 – 2016 Sentra (B17)
SERVICE INFORMATION
The information in this bulletin is provided for customers who have concerns with their
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
(R1608 / NTB16-053).
Completed:

Write on the repair order the date it was completed and by which dealer.

Go to step 2.
Not Completed:

Complete campaign R1608 / NTB16-053.

No further action needed. OCS retrofit does NOT apply.
Nissan 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 Nissan dealer 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 R1608 / NTB16-053 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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SERVICE PROCEDURE
WARNING: This procedure involves working under the 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.
2. Write down the radio settings.
Presets
AM
FM 1
FM 2
SAT 1
SAT 2
SAT 3
Bass
1
2
Treble
3
4
Balance
Fade
5
6
Spd Sen. Vol.
3. Record (write down) any other customer settings that will be lost when the battery is
disconnected.

Refer to the Electronic Service Manual (ESM) section PG-Power Supply, Ground,
& Circuit Elements, for a listing of systems that may lose settings or memory when
disconnecting the 12V battery.
 Look in the PG section index for ADDITIONAL SERVICE WHEN REMOVING
BATTERY NEGATIVE TERMINAL.
 This list often includes items such as audio, HVAC, power windows, clock,
etc.
4. Turn the ignition OFF.
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5. Passenger seat removal:
a. Disconnect both battery cables, negative cable first.
b. Wait at least 3 minutes.
c. Remove the passenger seat from the vehicle.

Refer to the ESM, section SE-Seat, for seat removal information.
6. Set the seat in a clean working area.
NOTE:

With the seat removed you will
have access to the connectors
shown in Figure 1.

These connectors were connected
to the seat.
Figure 1
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7. Carefully cut the sheath (harness cover) and remove wires as shown in Figure 2.

Inspect the wires to make sure there is no damage due to the cutting process.
8. Select the connector shown in Figure 2:

8 wire slots, only 4 are occupied

The wire colors are:




Red (R)
Pink (P)
Black (B)
Gray (GY)
Sheath cut
Wires removed
from sheath
Connector with 8
wire slots.
Figure 2
9. Use a small flat-blade screwdriver to open the
connector latch (see Figure 3).
Connector
latch open
NOTE: There is a
slot on the opposite
side of the connector
that can be used to
help open the latch.
Inset screwdriver into
slot and gently twist to
open the latch.
Figure 3
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NOTE: In the next step, you will insert a
jumper wire in the slot shown in Figure
4.
Insert
jumper
wire
here
Figure 4
10. Insert the jumper wire as shown (see
Figures 4 and 5).

Jumper wire is listed in the Parts
Information.

Both ends of the jumper wire are the
same, use either end.
Figure 5
11. After the wire is inserted, gently tug to confirm it is latched in place.
12. Squeeze the connector to close the latch.
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13. Select the connector shown in Figure 6:

4 wire slots, only 2 are occupied

The wire colors are:
 Light Green (LG)
 Black (B)
Connector with 4
wire slots.
Figure 6
14. Use a small pick tool on top of the connector to
open the connector latch (see Figure 7).
Use small pick tool on
top of the connector to
open the latch
Connector
latch open
Figure 7
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Insert
jumper
wire
here
NOTE: In the next step, you will insert
the other end of the jumper wire in the
slot shown in Figure 8.
Figure 8
15. Insert the other end of the jumper wire as shown (see Figures 8 and 9).
Figure 9
16. After the wire is inserted, gently tug to confirm it is latched in place.
17. Squeeze the connector to close the latch.
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NOTE: The jumper wire is now connected as show in Figure 10.
Jumper wire
Figure 10
18. Tuck the jumper wire and other wires into the sheath.
Jumper wire
Tuck wires into
the sheath
Figure 11
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19. Tape the harness as shown in Figure 13.

Refer to the Parts Information for electrical tape requirement.
Tape the
harness
Figure 12
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20. Remove the old seat belt buckle and install the new one (see Figure 13).

New buckles are listed in the Parts Information.

New buckles look the same as the old ones.
 Harness connector of new buckle is 4 slots with 3 occupied.
 Harness connector of old buckle is 4 slots with only 2 occupied.

Buckle is held on with one bolt.

Route and connect the harness of the new buckle the same as the old buckle.
Buckle harness
Buckle
mounting
bolt
Figure 13
IMPORTANT: Make sure this bracket is
present.

This bracket is installed as part of
campaign R1608 / NTB16-053.

If the bracket is not installed, it must
be installed before continuing.

If needed, refer to NTB16-053 for
bracket installation.
Bracket
Figure 14
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21. From under the seat, remove the old OCS harness and install the new one.

The OCS harness consists of the wiring and connectors between the OCS sensors
and the OCS control unit.

The new OCS harness is listed in the Parts Information.
IMPORTANT:
a. Disconnect one OCS harness connector or mounting clip, then
b. Connect the new OCS harness connector or mounting clip before moving to the
next one.

Disconnecting/connecting one at a time will ensure that the new harness is
connected exactly as the old one.

Refer to Figure 15 below and Figure 16 on the next page for exact harness
mounting points.
Buckle harness
clip behind OCS
harness
OCS control
unit
Harness clip
Harness clip
Harness
clip
Harness clip
Harness
clip
OCS harness
connector
Seat belt
buckle
connector
Harness clip
OCS sensor
Rear OCS
sensor
Harness
clip
Figure 15
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Harness
clip
Harness clip
Harness clip
Harness clip
OCS harness
connector
Harness
clip
Seat belt
buckle
connector
OCS sensor
Rear OCS
sensor
Harness clip
Figure 16
OCS control unit
22. Replace the OCS control unit with the
new one.

The OCS control unit is held on with
2 screws.

The OCS control unit is located under
the front edge of the seat.

New OCS control unit is listed in the
Parts Information.
Figure 17
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23. Reinstall the seat into the vehicle in reverse order
of removal.

Torque passenger seat mounting bolts to: 40
N•m (4.1 kg-m, 30 ft-lb).

Torque bolts in the order shown.
Figure 18
24. Re-connect battery cables, positive cable first.
25. Reset/reinitialize systems as needed.

Refer to the ESM section, PG – Power, Supply & Ground Elements for a listing of
systems that require reset/initialization after reconnecting the 12V battery.
 Look in the PG section index for ADDITIONAL SERVICE WHEN REMOVING
BATTERY NEGATIVE TERMINAL.
 This list often includes items such as audio, power windows, clock, etc.
26. Perform Zero Point Reset, using CONSULT III plus, on the next page.
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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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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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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 15.
Step 11
Figure 4A
Figure 5A
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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
NTB17-059b
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
PASSENGER AIR BAG
INDICATOR LIGHT
FRONT
PASSENGER AIR
BAG STATUS
Empty
Empty front passenger seat
ON (illuminated)
DISABLED
Nobody/Somebody
Bag or Child or Child Restraint
or Small Adult in the front
passenger seat
ON (illuminated)
DISABLED
Adult
Adult in front passenger seat
OFF (dark)
ENABLED

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 ESM 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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PARTS INFORMATION
DESCRIPTION
PART #
QUANTITY
Controller Assy-Occupant Sensor
(OCS Control Unit)
98856-3RN0A
1
Seatbelt Buckle – Black/Charcoal
86842-3RN8A
Seatbelt Buckle – Beige/Tan
86842-3RN8B
1
Harness - Occupant
(OCS Harness)
Harness-Front Seat
(Jumper Wire)
98854-3RN0A
1
24009-4AF1A
1
3M/Scotch Professional
Grade Vinyl Super 88
Electrical Tape
Shop Supply
Electrical Tape ( ¾” wide)
or equivalent (1)
(1) This product (or an equivalent) is available at many local automotive supply stores, and
many local hardware stores.
Jumper wire
Figure A
CLAIMS INFORMATION
Submit a “CM” line claim using the following claims coding:
CM ID
DESCRIPTION
OP CODE
FRT
P7322
Perform OCS Retrofit
P73220
0.9 hrs
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FRONT PASSENGER AIR BAG STATUS LIGHT OPERATION
NOTE: Please print this page and place a copy in the vehicle.
OCS SYSTEM OPERATION
The OCS system enables or disables the front passenger air bag
depending on the weight applied to the front passenger seat. Front
passenger air bag status (Enabled or Disabled) is indicated by the
front passenger air bag status lamp pictured here
 When the front passenger seat is empty, the passenger air bag status lamp should be
ON (illuminated) which means the passenger air bag is Disabled.
 When the front passenger seat is occupied by an adult, the passenger air bag status
lamp should be OFF (dark) which means the passenger air bag is Enabled.
 When the front passenger seat is occupied by a child, a child restraint, or a small adult,
the passenger air bag status lamp should be ON (illuminated) which means the
passenger air bag is Disabled.
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