Nissan Frontier. Manual - part 1153

SR-2

< PRECAUTION >

PRECAUTIONS

PRECAUTION

PRECAUTIONS

Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT 
PRE-TENSIONER"

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The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along

with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain

types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS

system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front

air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.

Information necessary to service the system safely is included in the SR and SB section of this Service Man-

ual.

WARNING:

• To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in

the event of a collision which would result in air bag inflation, all maintenance must be performed by

an authorized NISSAN/INFINITI dealer.

• Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal

injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag

Module, see the SR section.

• Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this

Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or har-

ness connectors.

PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS

WARNING:

• When working near the Airbag Diagnosis Sensor Unit or other Airbag System sensors with the Igni-

tion ON or engine running, DO NOT use air or electric power tools or strike near the sensor(s) with a

hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly causing

serious injury.

• When using air or electric power tools or hammers, always switch the Ignition OFF, disconnect the

battery and wait at least three minutes before performing any service.

Precaution for SRS "AIR BAG" and "SEAT BELT PRE-TENSIONER" Service

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• Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.

• Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least three

minutes.

For approximately three minutes after the cables are removed, it is still possible for the air bag and seat belt

pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least three minutes

have passed.

• The air bag diagnosis sensor unit must always be installed with the arrow mark “

⇐” pointing toward the front

of the vehicle for proper operation. Also check the air bag diagnosis sensor unit for cracks, deformities or

rust before installation and replace as required.

• The spiral cable must be aligned with the neutral position since its rotations are limited. Do not attempt to

turn steering wheel or column after removal of steering gear.

• Handle air bag module carefully. Always place driver and front passenger air bag modules with the pad side

facing upward and seat mounted front side air bag module standing with the stud bolt side facing down.

• Conduct self-diagnosis to check entire SRS for proper function after replacing any components.

• After air bag inflates, the front instrument panel assembly should be replaced if damaged.

Occupant Classification System Precaution

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Replace control unit and passenger front seat cushion as an assembly.

COLLISION DIAGNOSIS

SR-3

< BASIC INSPECTION >

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BASIC INSPECTION

COLLISION DIAGNOSIS

For Frontal Collision

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FOR FRONTAL COLLISION: When SRS is activated in a collision

CAUTION:

Due to varying models and option levels, not all parts listed in the chart below apply to all vehicles.

WORK PROCEDURE

1. Before performing any of the following steps, ensure that all vehicle body and structural repairs have been

completed. 

2. Replace the diagnosis sensor unit.

3. Remove the front air bag modules, crash zone sensor assembly, bracket and seat belt pre-tensioner

assemblies.

4. Check the SRS components using the table below:

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

5. Install new front air bag modules, crash zone sensor assembly, bracket and seat belt pre-tensioner

assemblies.

6. Perform self-diagnosis using CONSULT or air bag warning lamp. Refer to 

SRC-15, "Trouble Diagnosis

without CONSULT"

 for details.

Ensure entire SRS operates properly. 

7. 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

Inspection

Driver air bag module

If the driver air bag has deployed:
REPLACE
Install with new fasteners.

Front passenger air bag module 
(if equipped)

If the front passenger air bag has deployed:
REPLACE
Install with new fasteners.

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 fasteners.
*: Confirm seat belt pre-tensioner activation using CONSULT only.

Seat belt pre-tensioner assem-
blies
(All applicable locations: buckle, 
retractor, lap outer)

If either the driver or passenger seat belt pre-tensioner* has been activated:
REPLACE all seat belt pre-tensioner assemblies with new fasteners.
*: Confirm seat belt pre-tensioner activation using CONSULT only.

Diagnosis sensor unit

If any of the SRS components have been activated:
REPLACE the diagnosis sensor unit.
Install with new fasteners.

Steering wheel

1.

Visually check steering wheel for deformities.

2.

Check harness (built into steering wheel) and connectors for damage, and terminals for defor-
mities.

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.

SR-4

< BASIC INSPECTION >

COLLISION DIAGNOSIS

FOR FRONTAL COLLISION: When SRS is not activated in a collision

CAUTION:

Due to varying models and option levels, not all parts listed in the chart below apply to all vehicles.

WORK PROCEDURE

1. Before performing any of the following steps, ensure that all vehicle body and structural repairs have been

completed. 

2. Check the SRS components using the table below:

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

3. Perform self-diagnosis using CONSULT or air bag warning lamp. Refer to 

SRC-15, "Self-Diagnosis Func-

tion (Without CONSULT)"

 for details.

Ensure entire SRS operates properly. 

4. 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)

Occupant classification system 
(Passenger seat)

1.

Remove passenger seat assembly.

2.

Check control unit case for dents, cracks of deformities.

3.

Check connectors 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 connectors

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 harness.

Instrument panel assembly

If the passenger front air bag has deployed: 
REPLACE the instrument panel assembly. (integrated type)

Part

Inspection

Part

Inspection

Driver air bag module

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

Remove driver air bag module. Check harness cover and connectors for damage, 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 equipped)

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 fasteners.

Crash zone sensor

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, terminals for defor-
mities, 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. 

COLLISION DIAGNOSIS

SR-5

< BASIC INSPECTION >

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For Side and Rollover Collision

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FOR SIDE AND ROLLOVER COLLISION: When SRS is activated in a collision

CAUTION:

Due to varying models and option levels, not all parts listed in the chart below apply to all vehicles.

WORK PROCEDURE

1. Before performing any of the following steps, ensure that all vehicle body and structural repairs have been

completed. 

2. Replace the following components:

-

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

-

Door finisher (on the side on which door-mounted curtain air bag is activated).

-

Pop-up roll bar assemblies and pop-up roll bar covers.

-

Side air bag (satellite) sensor LH/RH (on the side on which side air bag is activated).

-

Diagnosis sensor unit.

-

Seat belt pre-tensioner assemblies.

Seat belt pre-tensioner assem-
blies
(All applicable locations: buckle, 
retractor, lap outer)

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 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.

Steering wheel

1.

Visually check steering wheel for deformities.

2.

Check harness (built into steering wheel) and connectors for damage, and terminals for defor-
mities.

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 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 classification system 
(Passenger seat)

1.

Remove passenger seat assembly.

2.

Check control unit case for dents, cracks of deformities.

3.

Check connectors 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 connectors

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 harness.

Instrument 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 assembly.

3.

If damaged—REPLACE the instrument panel assembly.

Part

Inspection