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Home >> Mitsubishi >> 2010 >> Lancer Evolution L4-2.0L Turbo (4B11T/C) >> Repair and Diagnosis >> Body and Frame >> Repairs and Inspections Required After a Collision >> Service and Repair >> Air Bag Systems

Air Bag Systems

REPAIR PROCEDURE

WHEN FRONT AIR BAGS DEPLOY IN A COLLISION.

1. Replace the following parts with new ones:
- Front impact sensors.
- SRS-ECU.
- Driver's air bag modules.
- Passenger's (front) air bag modules.
- Knee air bag module.
- Seat belt with pre-tensioner.
- Instrument panel assembly.
- Slide adjuster (RH).

2. Check the following parts and replace if there are any malfunctions:
- Clock spring.
- Seat slide sensor
- Seat belt switch (Refer to Front Seat Belt,Inspection).
- Steering wheel, steering column shaft assembly

1. Check the wiring harness (built into the steering wheel)and connectors for damage, and terminals for deformation.
2. Install the air bag module to check fit and alignment with the steering wheel.
3. Check the steering wheel for noise, binding or difficult operation and excessive free play.
4. Check the steering column shaft shock absorbing mechanism (Refer to On-Vehicle Service - Steering Column Shaft Assembly Shock Absorbing Mechanism Check).

3. Check the wiring harnesses for binding, the connectors for damage, poor connections, and the terminals for deformation.

WHEN SIDE AND CURTAIN AIR BAGS DEPLOY INA COLLISION.

1. Replace the following parts with new ones:
- SRS-ECU.
- Side impact sensors.
- Front seatback.
- Slide adjuster (RH).
- Curtain air bag module.

2. Check the wiring harnesses for binding, the connectors for damage, poor connections, and the terminals for deformation.

WHEN AIR BAGS DO NOT DEPLOY IN LOW-SPEED COLLISION.
Check the SRS components. If the SRS components are showing any visible damage such as dents, cracks, or deformation,replace them with new ones. Concerning parts removed for inspection, replacement with new parts and cautionary points for working, refer to appropriate INDIVIDUAL COMPONENT SERVICE.

FRONT IMPACT SENSOR







1. Check the headlight support panel upper for distortion and rust.
2. Check the front impact sensor for dents, cracks, deformation or rust.
3. Check the front impact sensor wiring harness for binding,check the connector for damage, and check the terminals for deformation.

NOTE: The illustration shows the side impact sensor (LH). The position of the side impact sensor (RH) is symmetrical to this.

SRS-ECU







1. Check the SRS-ECU case and brackets for dents, cracks or deformation.
2. Check the connector for damage, and the terminals for deformation.
3. Check the installation of the SRS-ECU and its bracket.

AIR BAG MODULES







1. Check the pad cover for dents, cracks or deformation.
2. Check the connector for damage, terminal deformities, and the harness for binding.
3. Check the air bag inflator case for dents, cracks or deformities.
4. Install the air bag module (driver's side) to the steering wheel to check installation or alignment with the steering wheel.
5. Install the air bag module (front passenger's side) to the instrument panel and front deck crossmember to check installation or alignment.

FRONT SEATBACK ASSEMBLY (SIDE-AIR BAG MODULE)







1. Check the air bag module deployment section for dents or deformation.
2. Check that there is no connector damage, bent terminals or harness crimping.

CLOCK SPRING







1. Check the clock spring connectors and protective tube for damage, and the terminals for deformation.
2. Visually check the case for damage.

SIDE IMPACT SENSOR







1. Check that there is no bending or corrosion in the center pillar.
2. Check that there is no denting, breakage or bending of the side impact sensor.
3. Check that there is no harness crimping, connector damage or bent terminals.

NOTE: The illustration shows the side impact sensor (LH). The position of the side impact sensor (RH) is symmetrical to this.

SEAT SLIDE SENSOR







1. Check that there is no connector damage, bent terminals or harness crimping.
2. Check the installation of the seat slide sensor.

OCCUPANT CLASSIFICATION-ECU AND WEIGHT SENSOR







1. Check the occupant classification-ECU case and weight sensor for dents, cracks or deformation.
2. Check the connector for damage, and the terminals for deformation.
3. Check the installation of the occupant classification-ECU and weight sensor.
4. Check the diagnostic trouble code of the occupant classification-ECU and replace the slide adjuster (RH) if DTC B1BA7 is set.

CURTAIN AIR BAG MODULE







1. Check that the curtain air bag deployment part of the headlining is normal.
2. Check the inflator surface for cracks, dents or deformations.
3. Check the connector for damage, the terminal for deformation, and the harness for binding.

STEERING WHEEL, STEERING COLUMN AND SHAFT ASSEMBLY

1. Check the wiring harness (built into the steering wheel) and the connectors for damage, and the terminals for deformation.
2. Install the air bag module to check fit or alignment with the steering wheel.
3. Check the steering wheel for noise, binding or difficult operation and excessive free play.
4. Check the steering column shaft shock absorbing mechanism (Refer to On-Vehicle Service - Steering Column Shaft Assembly Shock Absorbing Mechanism Check).

SEAT BELT WITH PRE-TENSIONER

1. Check the seat belt for damage or deformation.
2. Check the seat belt with pre-tensioner for cracks or deformation.
3. Check that the unit is installed correctly to the vehicle body.

HARNESS CONNECTOR
Check the harnesses for binding, the connectors for damage,poor connection, and the terminals for deformation.
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