STEP 1. Check front turn-signal light (LH) connector A-82 <front>, side turn-signal light (LH) connector A-13 <side (fender panel type)>, door mirror assembly (LH) connector F-01 <side (door mirror type)>, rear combination light (LH) connector D-19 <rear> for loose, corroded or damaged terminals, or terminals pushed back in the connector.
STEP 2. Check ETACS-ECU connectors C-403 <front or side (fender panel type)>, C-417 <side (door mirror type)> and C-413 <rear> for loose, corroded or damaged terminals, or terminals pushed back in the connector.
STEP 3. Check the wiring harness between front turn-signal light (LH) connector A-82 (terminal 2) <front>, side turn-signal light (LH) connector A-13 (terminal 2) <side (fender panel type)>, door mirror assembly (LH) connector F-01 (terminal 2) <side (door mirror type)>, rear combination light (LH) connector D-19 (terminal 2) <rear> and ETACS-ECU connector C-403 (terminal 9) <front or side (fender panel type)>, C-417 (terminal 4) <side (door mirror type)> or C-413 (terminal 18) <rear>.
note | Also check intermediate connector A-52 <front> or C-225 <side (door mirror type)> for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector A-52 <front> or C-225 <side (door mirror type)> is damaged, repair or replace the connector as described in GROUP 00E, Harness Connector Inspection . |
- Check the power supply line for short circuit.
Are the wiring harness between front turn-signal light (LH) connector A-82 (terminal 2) <front>, side turn-signal light (LH) connector A-13 (terminal 2) <side (fender panel type)>, door mirror assembly (LH) connector F-01 (terminal 2) <side (door mirror type)>, rear combination light (LH) connector D-19 (terminal 2) <rear> and ETACS-ECU connector C-403 (terminal 9) <front or side (fender panel type)>, C-417 (terminal 4) <side (door mirror type)> or C-413 (terminal 18) <rear> in good condition?
Go to Step 4. The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary. Verify that the headlights illuminate normally.
STEP 4. Using scan tool MB991958, Check whether the diagnostic trouble code is set again.
(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
."
(2) Turn the ignition switch to the "ON" position.
(3) Erase the DTC.
(4) Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(5) Check if DTC is set.
Is the DTC set?
Replace the ETACS-ECU. The procedure is complete.