[Previous][Next]
Inspection procedure 1: Communication between the Scan Tool and the SRS-ECU is not possible.
 
 
 
 
TECHNICAL DESCRIPTION (COMMENT)
If the scan tool (M.U.T.-III Sub Assembly) can not communicate with the SRS system, the CAN bus lines may be defective. If the SRS system does not work, the SRS-ECU or its power supply circuit may be defective.
 
 
TROUBLESHOOTING HINTS (The most likely causes for this case:)
  • Damaged wiring harness or connector
  • Malfunction of the SRS-ECU
 
 
DIAGNOSIS
STEP 1. Using scan tool MB991958, diagnose the CAN bus line.
(1)
cautionTo prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
Connect scan tool MB991958. Refer to "How to connect the Scan Tool (M.U.T.-III) ."
(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Is the CAN bus line found to be normal?
Check and repair the power supply circuit system (Refer to ).
Repair the CAN bus line (Refer to GROUP 54C, Diagnosis ).