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Air Bag Control Module: Service and Repair




Diagnosis Sensor Unit: Removal and Installation

Removal










WARNING:

- Before servicing the SRS, turn the ignition switch off, disconnect both battery terminals and wait at least three minutes.
- Do not use old bolts; replace with new bolts.
- Check diagnosis sensor unit bracket to make sure it is free of deformities, dents, cracks or rust. If it shows any visible signs of damage, replace with new one.
- Replace diagnosis sensor unit if it has been dropped or sustained an impact.
- Never use air tools or electric tools for servicing.
- When replacing the air bag diagnosis sensor unit, always check with the parts department for the latest parts information. Installing an incorrect air bag diagnosis sensor unit may or may not cause the air bag warning lamp to illuminate and may cause incorrect deployment of the supplemental air bags and seat belt pre-tensioner in a collision resulting in serious personal injury or death.

1) Always check the air bag diagnosis sensor unit C/U identification number or part number using SDT.
2) Disconnect the negative and positive battery terminals, then wait at least three minutes.
3) Disconnect the harness connectors for the following SRS components: Refer to [Side Curtain Air Bag Module: Removal and Installation] Side Curtain Air Bag Module (Side curtain air bag module), [Front Seat Belt Pre-Tensioner: Removal and Installation] Service and Repair (Front seat belt pre-tensioner) and [Front Seat: Seatback Assembly Removal and Installation] Front Seat Seatback Assembly Removal and Installation (Side air bag module).
4) Remove center console. Refer to [Center Console: Removal and Installation] Center Console.
5) Disconnect diagnosis sensor unit connectors.
6) Remove bolts from the diagnosis sensor unit.

CAUTION:

- Do not use old bolts; replace with new bolts.
- Check diagnosis sensor unit bracket to ensure it is free of deformities, dents, cracks or rust. If it shows any visible signs of damage, replace with new one.
- Replace diagnosis sensor unit if it has been dropped or sustained an impact.

Installation

Installation is in the reverse order of removal.

- After the work is completed, perform self-diagnosis to check that no malfunction is detected. Refer to [SRS Operation Check] SRS Operation Check.

CAUTION:

- The diagnosis sensor unit must always be installed with the arrow mark "left arrow" pointing toward the front of the vehicle for proper operation.
- Never damage the harness while installing.
- If malfunction is detected by the air bag warning lamp, after repair or replacement of the malfunctioning parts, reset the memory using self-diagnosis or SDT. Refer to [Self-Diagnosis Function (without SDT)] Self-Diagnosis Function (without SDT).
- After the work is completed, check that no system malfunction is detected by air bag warning lamp.
- After replacing the air bag diagnosis sensor unit, confirm using SDT that the C/U identification number or part number of the new replacement air bag diagnosis sensor unit matches the C/U identification number or part number of the replaced (old) air bag diagnosis sensor unit.

NOTE:

If the C/U discriminated number or part number of the new replacement air bag diagnosis sensor unit differs from the C/U discriminated number or part number of the replaced air bag diagnosis sensor unit, reconfirm the parts information and verify that the correct air bag diagnosis sensor unit was installed.

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