STEP 1. Using scan tool MB991958, read the diagnostic trouble code.
(1) caution | To 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 scan tool (M.U.T.-III)
."
(2) Turn the ignition switch to the "ON" position.
(3) Check whether the ETACS-ECU related DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Is the DTC set?
Diagnose the ETACS-ECU. Refer to . Go to Step 2.
STEP 2. Using scan tool MB991958, check data list.
STEP 3. Check key reminder switch connector C-307, ETACS-ECU connector C-415 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
STEP 4. Check the wiring harness between key reminder switch connector C-307 (terminal No. 2) and ETACS-ECU connector C-415 (terminal No. 1).
STEP 5. Check of ignition key hole illumination light bulb
STEP 6. Check the wiring harness between key reminder switch connector C-307 (terminal No. 4) and ground.
STEP 7. Check the wiring harness between key reminder switch connector C-307 (terminal No. 1) and front dome light connector E-09 (terminal No. 3).
STEP 8. Retest the system