Air Bag Control Module: Testing and Inspection

CAUTION:
1. Never attempt to disassemble or repair the SRS-ECU. If faulty, replace it.
2. Do not drop or subject the SRS-ECU to impact or vibration.
If denting, cracking, deformation, or rust are discovered in the SRS-ECU, replace it with a new SRS-ECU. Discard the old one.
3. After deployment of an air bag, replace the SRS-ECU with a new one.
4. Never use an ohmmeter on or near the SRS-ECU, and use only the special test equipment.

INSPECTION
- Check the SRS-ECU and brackets for dents, cracks or deformation.
- Check the SRS-ECU connector for damage, and terminals for deformation.

CAUTION: If a dent, crack, deformation or rust is discovered, replace the SRS-ECU with a new one.

NOTE: Refer to System Diagnosis for inspection of SRS-ECU for other than physical damage.

To inspect and service the SRS after a collision (whether or not the air bags have deployed), perform the following steps.

SRS-ECU Memory Check
1. Connect the scan tool to the data link connector (16-pin).

CAUTION: Turn off ignition switch before connecting or disconnecting the scan tool.

2. Read (and write down) all displayed diagnostic trouble codes.

NOTE: If the battery power supply has been disconnected or disrupted by the collision, the scan tool cannot communicate with the SRS-ECU. Check the battery, then inspect and, if necessary, repair the body wiring harness before proceeding.

Data List:

3. Read the data list (fault duration and how many times memories are erased) using the scan tool.

4. Erase the diagnostic trouble codes and after waiting 5 seconds or more read (and write down) all displayed diagnostic trouble codes.