INSPECTION PROCEDURE 3: SRS warning lamp does not illuminate.


OPERATION



PROBABLE CAUSES



DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnostics.
Use M.U.T.-III to diagnose the CAN bus lines.

Q. Is the check result normal?
Go to Step 2.
Repair the CAN bus lines (refer to Group 54C - Troubleshooting ).

STEP 2. M.U.T.-III actuator test
Use M.U.T.-III to perform the SRS-ECU actuator tests.
Item No. 01: SRS warning lamp

Q. Does the SRS warning lamp turn on and off normally?
Go to Step 5.
Go to Step 3.

STEP 3. M.U.T.-III actuator test
Use M.U.T.-III to perform the combination meter actuator tests.
Item No. 07: Indicator1

Q. Does the SRS warning lamp turn on and off normally?
Replace SRS-ECU (Refer to ).
Go to Step 4.

STEP 4. Check of short to power supply, short to earth, and open circuit in IG1 line between ETACS-ECU connector and combination meter connector

Q. Is the check result normal?
Replace the combination meter (Refer to GROUP 54A - Combination Meter ).
Repair the wiring harness.

STEP 5. Recheck of the SRS warning lamp
(1)Connect the negative battery terminal.
(2)Ignition switch: ON

Q. Does the lamp illuminate?
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).
Return to Step 1.