Collision Diagnosis

DESCRIPTION
Some models have "built-in" type side air bags. Side air bags that deploy through the seam of the seat back upholstery are "built-in" type side air bags.

CAUTION:
- Before servicing the SRS system turn the ignition key OFF, disconnect both battery cables and wait at least 3 minutes.
- Do not use electrical test equipment on any circuit related to the SRS unless instructed to in the service procedures. Spiral cable and wiring harnesses can be identified by yellow harness connector (and with yellow harness protector or yellow insulation tape before the harness connectors). Do not attempt to repair, splice or modify the SRS wiring harness. If the harness is damaged, replace it with a new one. Keep ground connections clean.
- Always mount the diagnosis sensor unit with the forward mark to the front.
- Do not expose air bag modules to temperatures exceeding 90°C (194 °F).
- Do not expose seat belt pre-tensioner to temperatures exceeding 80°C (176°F).
- Do not allow oil, grease or water to come in contact with Air Bag Modules.
- Air bag modules must be deployed before they are discarded.
- Front seat belt assemblies (Pretensioners) must be deployed before they are discarded.
- Always place driver and passenger air bag modules with the pad side facing upward.
- Always place side air bag module standing with the stud bolt side setting bottom.
- Do not tap or bump the steering wheel.
- Do not attempt to disassemble air bag modules.
- Do not drop or impact air bag modules.
- Do not apply lubricant to the spiral cable.
- Do not attempt to disassemble the spiral cable.
- The spiral cable may snap or be damaged if it is turned more than 2.5 turns from its neutral position.
- Bolts used for SRS components are coated with a special bonding agent. Do not use old bolts after removal. Use new bolts when installing components.

DIAGNOSTIC REPAIR PROCEDURE (FOR FRONTAL COLLISION)

When the SRS is activated in a frontal collision
1. Replace the Diagnosis Sensor Unit.
2. Remove front Air Bag Module(s) and seat belt pre4ensioner assemblies.
3. Inspect items listed to "Frontal Collision Inspection".
4. Install new front Air Bag Module(s) and seat belt pre4ensioner assemblies. Install with new bolts.
5. Perform self-diagnosis.

When the SRS is not activated in a frontal collision
1. Air Bag Modules (driver and passenger side):
a. Remove air bag modules. Check harness cover and connectors for damage, terminals for deformities, and harness for binding.
b. Install driver air bag module into the steering wheel to check fit and alignment with the wheel.
c. Install passenger air bag module into the instrument panel to check fit with the instrument panel.
d. No damage is found, reinstall with new bolts.
e. If damaged, REPLACE damaged modules. Air Bag must be deployed before discarding.

2. Seat Belt Pre-tensioner Assemblies (Front LH and RH):
a. Remove seat belt pre-tensioners. Check harness cover and connectors for damage, terminals for deformities, and harness for binding.
b. Check belts for damage and anchors for loose mounting.
c. Check retractor for smooth operation.
d. If no damage is found reinstall with new bolts.
e. If damaged, REPLACE damaged seat belt pre-tensioners with new bolts coated with bonding agent. Seat belt pre-tensioners must be deployed before discarding.

3. Diagnosis sensor unit:
a. Check case for dents, cracks or deformities.
b. Check connectors for damage, and terminals for deformities.
c. If no damage is found, reinstall with new special bolts and ground bolt.
d. If damaged, REPLACE damaged diagnosis sensor unit with new special bolts and ground bolt.

4. Perform items listed to "Frontal Collision Inspection".

Frontal Collision Inspection
1. Steering Wheel:
a. Visually check steering wheel for deformities.
b. Harness (built into the steering wheel) and connectors for damage, and terminals for deformities.
c. Install air bag module to check fit or alignment with steering wheel.
d. Check excessive steering wheel free play.
e. If no damage is found, reinstall with bolts.
f. If damaged, REPLACE damaged parts.

2. Spiral Cable:
a. Visually check spiral cable and combination switch for damage.
b. Check connectors and protective tape for damage.
c. Check steering wheel for noise, binding or heavy operation.
d. If no damage is found, reinstall with bolts.
e. If damaged, REPLACE damaged parts.

3. Harness and Connectors:
a. Check connectors for poor connection, damage, and terminal for deformities.
b. Check harness for bonding, chafing, cuts, or deformities.
c. If no damage is found, reinstall the harness and connectors.
d. REPLACE damaged section of harness. Do not attempt to repair, splice or modify any SRS harness.










4. Instrument Panel:
a. When passenger air bag inflates, check the following points for bending, deformities or cracks.
- Opening portion for passenger air bag
- Passenger air bag module brackets
- The portions securing the instrument panel
b. If no damage is found, reinstall the instrument panel.
c. If damage, REPLACE the instrument panel with bolts.

DIAGNOSTIC REPAIR PROCEDURE (FOR SIDE COLLISION)
When the SRS is activated in a side collision
1. Replace the Diagnosis Sensor Unit and Satellite Sensor (on the side in which air bag is activated)
2. Remove side Air Bag Module(s).
3. Inspect items listed to "Side Collision Inspection".
4. Install new side Air Bag Module and replace all parts of the seat back. (including the seat back frame) Install with new nuts.
5. Perform self-diagnosis.

When the SRS is not activated in a side collision
1. Built-in Type Side Air Bag Module (LH or RH)
a. Check for visible signs of damage (dents, tears, deformation) of the seat back on the collision side.
b. If damaged, REPLACE the damaged seat parts with new bolts and remove the side air bag module.
c. Check for visible signs of damage (tears etc.) of the side air bag module.
d. Check harness and connectors for damage, and terminals for deformities.
e. If no damage is found, reinstall the side air bag module with new torx nuts coated with bonding agent.
f. If damaged, REPLACE the side air bag module with new torx nuts coated with bonding agent. Air bag must be deployed before disposing of it.

2. Satellite Sensor (LH or RH)
a. Remove the satellite sensor on the collision side. Check harness connectors for damage, terminals for deformities, and harness for binding.
b. Check for visible signs of damage (dents, cracks, deformation) of the satellite sensor.
c. Install the satellite sensor to check fit.
d. If no damage is found, reinstall the satellite sensor with new nuts coated with bonding agent.
e. If damaged, REPLACE the satellite sensor with new nuts coated with bonding agent.

3. Diagnosis Sensor Unit
a. Check case and bracket for dents, cracks or deformities.
b. Check connectors for damage, and terminals for deformities.
c. If no damage is found, reinstall the diagnosis sensor unit with new special bolts and ground bolt coated with bonding agent.
d. If damaged, REPLACE the diagnosis sensor unit with new special bolts and ground bolt coated with bonding agent.

4. Perform items listed to "Side Collision Inspection".

Side Collision Inspection
1. Seat
a. Visually check the seat on the collision side.
b. Remove the seat on the collision side and check the following for damage and deformities.
- Harness, connectors and terminals
- Frame and recliner (for front and rear seat), and also adjuster and slides (for front seat)
c. If no damage is found, reinstall the seat.
d. If damaged, REPLACE the damaged seat parts with new bolts.

2. Seat Belt Pre-tensioner Assembly
a. Check if the seat belt can be extended smoothly. If the seat belt cannot be extended smoothly. Check for deformities of the center pillar inner.
If the center pillar inner has no damage, REPLACE the seat belt pre-tensioner assembly.
b. Remove the seat belt pre-tensioner assembly on the collision side. Check harness cover and connectors for damage, terminals for deformities, and harness for binding.
c. Check for visible signs of damage (dents, cracks, deformation) of the seat belt pre-tensioner assembly.
d. If no damage is found, reinstall the seat belt pre-tensioner assembly with new bolts coated with bonding agent.
e. If damaged, REPLACE the seat pre-tensioner assembly with new bolts coated with bonding agent. The seat belt pre-tensioner assembly must be deployed before disposing of it.

3. Center Pillar Inner
a. Check the center pillar inner on the collision side for damage (dents, cracks, deformation).
b. If damaged, REPAIR the center pillar inner.

4. Trim
a. Check for visible signs of damage (dents, cracks, deformation) of the interior trim on the collision side.
b. If damaged, REPLACE the damaged trim parts.