Nissan Frontier D40. Manual - part 986

OCCUPANT CLASSIFICATION SYSTEM CONTROL UNIT

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OCCUPANT CLASSIFICATION SYSTEM CONTROL UNIT

Removal and Installation

INFOID:0000000005272904

The occupant classification control unit, occupant classification (pressure) sensor, and bladder are an integral
part of the front passenger seat cushion and are replaced as an assembly. Refer to 

SE-28, "Removal and

Installation"

 to remove the seat, and 

SE-39, "Seat Cushion Trim and Pad"

 to replace the seat cushion.

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COLLISION DIAGNOSIS

COLLISION DIAGNOSIS

For Frontal Collision

INFOID:0000000005272905

Check the SRS components using the following table.
• After the work is completed, perform self-diagnosis to check that no malfunction is detected. Refer to 

SRC-

13, "SRS Operation Check"

.

SRS INSPECTION (FOR FRONTAL COLLISION)

Part

SRS is activated

SRS is NOT activated

Driver air bag module

If the driver air bag 
has deployed:
REPLACE
Install with new fas-
teners.

If the driver air bag has NOT been activated:
1.

Remove driver air bag module. Check harness cover and connectors for dam-
age, terminals for deformities, and harness for binding.

2.

Install driver air bag module into the steering wheel to check fit and alignment 
with the wheel.

3.

If no damage is found, reinstall with new fasteners.

4.

If damaged—REPLACE. Install driver air bag modules with new fasteners.

Front passenger air 
bag module

If the front passenger 
air bag has deployed:
REPLACE
Install with new fas-
teners.

If the front passenger air bag has NOT been activated:
1.

Remove front passenger air bag module. Check harness cover and connectors 
for damage, terminals for deformities, and harness for binding.

2.

Install front passenger air bag module into the instrument panel to check fit with 
the instrument panel.

3.

If no damage is found, reinstall with new fasteners.

4.

If damaged—REPLACE. Install front passenger air bag modules with new fas-
teners.

Crash zone sensor

If any of the front air 
bags or seat belt pre-
tensioners* have 
been activated:
REPLACE the crash 
zone sensor and 
bracket with new fas-
teners.

*: Confirm seat belt 
pre-tensioner activa-
tion using CONSULT-
III only.

If the front air bags or seat belt pre-tensioners have NOT been activated:
1.

Remove the crash zone sensor. Check harness connectors for damage, termi-
nals for deformities, and harness for binding.

2.

Check for visible signs of damage (dents, cracks, deformation) of the crash zone 
sensor and bracket.

3.

Install the crash zone sensor to check fit.

4.

If no damage is found, reinstall with new fasteners.

5.

If damaged—REPLACE the crash zone sensor and bracket with new fasteners. 

Seat belt pre-tension-
er assemblies
(All applicable loca-
tions: buckle, reel, lap 
outer)

If either the driver or 
passenger seat belt 
pre-tensioner* has 
been activated:
REPLACE all seat 
belt pre-tensioner as-
semblies with new 
fasteners.

*: Confirm seat belt 
pre-tensioner activa-
tion using CONSULT-
III only.

If the pre-tensioners have NOT been activated:
1.

Remove seat belt pre-tensioners.
Check harness cover and connectors for damage, terminals for deformities, and 
harness for binding.

2.

Check belts for damage and anchors for loose mounting.

3.

Check retractor for smooth operation.

4.

Check seat belt adjuster for damage.

5.

Check for deformities of the center pillar inner.

6.

If the center pillar inner has no damage, REPLACE the seat belt pre-tensioner 
assembly.

7.

If no damage is found, reinstall seat belt pre-tensioner assembly.

8.

If damaged—REPLACE. Install the seat belt pre-tensioners with new fasteners. 

Diagnosis sensor unit

If any of the SRS com-
ponents have been 
activated:
REPLACE the diag-
nosis sensor unit.
Install with new fas-
teners.

If none of the SRS components have been activated:
1.

Check case for dents, cracks or deformities.

2.

Check connectors for damage, and terminals for deformities.

3.

If no damage is found, reinstall with new fasteners.

4.

If damaged—REPLACE. Install diagnosis sensor unit with new fasteners.

COLLISION DIAGNOSIS

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For Side and Rollover Collision

INFOID:0000000005272906

Check the SRS components using the following table.
• After the work is completed, perform self-diagnosis to check that no malfunction is detected. Refer to 

SRC-

13, "SRS Operation Check"

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WHEN SRS IS ACTIVATED IN THE SIDE OR ROLLOVER COLLISION

1.

Replace the following components:

-

Front seat back assembly (on the side on which side air bag is activated)

-

Diagnosis sensor unit

-

(LH or RH) side air bag (satellite) sensor (on the side on which side air bag is activated)

2.

Check the SRS components and the related parts using the following table.

-

Replace any SRS components and the related parts showing visible signs of damage (dents, cracks,
deformation).

3.

Conduct self-diagnosis using CONSULT-III and “AIR BAG” warning lamp. Refer to 

SRC-13, "SRS Opera-

tion Check"

 for details. Ensure entire SRS operates properly.

WHEN SRS IS NOT ACTIVATED IN THE SIDE OR ROLLOVER COLLISION

1.

Check the SRS components and the related parts using the following table.

-

If the front seat back assembly is damaged, the front seat back assembly must be replaced.

2.

Conduct self-diagnosis using CONSULT-III and “AIR BAG” warning lamp. Refer to 

SRC-13, "SRS Opera-

tion Check"

 for details. Ensure entire SRS operates properly.

SRS INSPECTION (FOR SIDE AND ROLLOVER COLLISION)

Steering wheel

1.

Visually check steering wheel for deformities.

2.

Check harness (built into steering wheel) and connectors for damage, and terminals for deformities.

3.

Install driver air bag module into the steering wheel to check fit and alignment with the wheel.

4.

Check steering wheel for excessive free play.

5.

If no damage is found, reinstall.

6.

If damaged—REPLACE.

Spiral cable

If the driver front air 
bag has deployed:
REPLACE the spiral 
cable.

If the driver front air bag has not deployed:
1.

Visually check spiral cable and combination switch for damage.

2.

Check connectors and protective tape for damage.

3.

Check steering wheel for noise, binding or heavy operation.

4.

If no damage is found, reinstall.

5.

If damaged—REPLACE.

Occupant classifica-
tion system (Passen-
ger seat)

1.

Remove passenger seat.

2.

Check control unit case for dents, cracks of deformities.

3.

Check connectors and pressure sensor tube for damage, and terminals for deformities.

4.

Check seat frame and cushion pan for dents or deformities.

5.

If no damage is found, reinstall seat with new fasteners.

6.

If damaged — REPLACE seat cushion assembly with new fasteners.

Harness and connec-
tors

1.

Check connectors for poor connection, damage, and terminals for deformities.

2.

Check harness for binding, chafing, cuts, or deformities.

3.

If no damage is found, reinstall the harness and connectors.

4.

If damaged—REPLACE the damaged harness. Do not attempt to repair, splice or modify any SRS har-
ness.

Instrument panel

If the passenger front 
air bag has deployed: 
REPLACE the instru-
ment panel assembly.

If the passenger front air bag has NOT deployed:
1.

Visually check instrument panel for damage.

2.

If no damage is found, reinstall the instrument panel.

3.

If damaged—REPLACE the instrument panel.

Part

SRS is activated

SRS is NOT activated

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COLLISION DIAGNOSIS

Part

SRS is activated

SRS is NOT activated

LH side curtain air 
bag module

If the LH side curtain 
air bag has deployed:
REPLACE the LH 
side curtain air bag 
module. (Repair the 
center pillar inner, etc. 
before installing new 
one if damaged.)

If the LH side curtain air bag has NOT deployed:
1.

Check for visible signs of damage (dents, tears, deformation) of the center pillar 
on the collision side.

2.

If damaged—Remove the LH side curtain air bag module.

3.

Check for visible signs of damaged (tears etc.) of the LH side curtain air bag mod-
ule.

4.

Check harness and connectors for damage, and terminals for deformities.

5.

If no damage is found, reinstall the LH side curtain air bag module with new fas-
teners.

6.

If damaged—REPLACE the LH side curtain air bag module with new fasteners. 

RH side curtain air 
bag module

If the RH side curtain 
air bag has deployed:
REPLACE the RH 
side curtain air bag 
module. (Repair the 
center pillar inner, etc. 
before installing new 
one if damaged.)

If the RH side curtain air bag has NOT deployed:
1.

Check for visible signs of damage (dents, tears, deformation) of the center pillar 
on the collision side.

2.

If damaged—Remove the RH side curtain air bag module.

3.

Check for visible signs of damaged (tears etc.) of the RH side curtain air bag 
module.

4.

Check harness and connectors for damage, and terminals for deformities.

5.

If no damage is found, reinstall the RH side curtain air bag module with new fas-
teners.

6.

If damaged—REPLACE the RH side curtain air bag module with new fasteners. 

Front LH side air bag 
module

If the front LH side air 
bag has deployed: 
REPLACE front LH 
seatback assembly.

If the front LH side air bag has NOT deployed: 
1.

Check for visible signs of damage (dents, tears, deformation) of the seat back on 
the collision side.

2.

Check harness and connectors for damage, and terminals for deformities.

3.

If damaged—REPLACE the front LH seatback assembly. 

Front RH side air bag 
module

If the front RH side air 
bag has deployed:
REPLACE front RH 
seatback assembly.

If the front RH side air bag has NOT deployed:
1.

Check for visible signs of damage (dents, tears, deformation) of the seat back on 
the collision side.

2.

Check harness and connectors for damage, and terminals for deformities.

3.

If damaged—REPLACE the front RH seatback assembly. 

(LH or RH) side air 
bag (satellite) sensor 

If any of the SRS 
components have de-
ployed:
REPLACE the side air 
bag (satellite) sensor 
on the collision side 
with new fasteners. 
(Repair the center pil-
lar inner, etc. before 
installing new one if 
damaged.)

If none of the SRS components have been activated:
1.

Remove the side air bag (satellite) sensor on the collision side. Check harness 
connectors for damage, terminals for deformities, and harness for binding.

2.

Check for visible signs of damage (dents, cracks, deformation) of the side air bag 
(satellite) sensor.

3.

Install the side air bag (satellite) sensor to check fit.

4.

If no damage is found, reinstall the side sir bag (satellite) sensor with new fasten-
ers.

5.

If damaged—REPLACE the side air bag (satellite) sensor with new fasteners.

Diagnosis sensor unit

If any of the SRS 
components have de-
ployed:
REPLACE the diag-
nosis sensor unit with 
new fasteners.

If none of the SRS components have been activated:
1.

Check case and bracket for dents, cracks or deformities.

2.

Check connectors for damage, and terminals for deformities.

3.

If no damage is found, reinstall the diagnosis sensor unit with new fasteners.

4.

If damaged—REPLACE the diagnosis sensor unit with new fasteners.

Seat belt pre-tension-
er assemblies
(All applicable loca-
tions: buckle, reel, lap 
outer)

If either the driver or 
passenger seat belt 
pre-tensioner* has 
been activated:
REPLACE all seat 
belt pre-tensioner as-
semblies with new 
fasteners.

* Confirm seat belt 
pre-tensioner activa-
tion using CONSULT-
III only.

If the pre-tensioners have NOT been activated:
1.

Remove seat belt pre-tensioners.
Check harness cover and connectors for damage, terminals for deformities, and 
harness for binding.

2.

Check belts for damage and anchors for loose mounting.

3.

Check retractor for smooth operation.

4.

Check seat belt adjuster for damage.

5.

Check for deformities of the center pillar inner.

6.

If the center pillar inner has no damage, REPLACE the seat belt pre-tensioner 
assembly.

7.

If no damage is found, reinstall seat belt pre-tensioner assembly.

8.

If damaged—REPLACE. Install the seat belt pre-tensioners with new fasteners.