Air Bag Control Module: Testing and Inspection

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

Check the SRS-ECU and brackets for dents, cracks or deformation.

Check the SRS-ECU connector for damage, and the terminals for deformation.

NOTE: Refer to SRS Diagnosis for inspection of SRS-ECU for other than physical damage. Symptom Related Diagnostic Procedures



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
Required Special Tool:
MB991502: Scan tool (MUT-H)

CAUTION: Turn "OFF" ignition switch before connecting or disconnecting scan tool MB991502.

1. Connect scan tool MB991502 to the data link connector (16-pin).
2. Read (and write down) all displayed diagnostic trouble codes.

NOTE: If the battery power supply has been disconnected or disrupted by the collision, scan tool MB991502 cannot communicate with the SRS-ECU. Check the battery then check and, if necessary repair The front wiring harness and The body wiring harness before proceeding.

Data list:

3. Read the data list (fault duration and how many times memories are erased) using scan tool MB991502.
4. Erase the diagnostic trouble codes and after waiting five seconds or more read (and write down) all displayed diagnostic trouble codes.