STEP 1. Check that the stoplight of the rear combination lamp illuminates normally.
STEP 2. Using scan tool (M.U.T.-III) CAN bus diagnostics
STEP 3. DTC recheck after resetting CAN bus lines
STEP 5. Connector check: C-410 ETACS-ECU connector
STEP 6. Measure the voltage at the C-410 ETACS-ECU connector.
(1) Measure by backprobing without disconnecting the ETACS-ECU connector and stoplight switch connector.
(2) Disconnecting the C-29 stoplight relay connector.
(3) Measure the voltage between the C-410 ETACS-ECU connector terminal No.16 and the body ground.OK:
- When the brake pedal is released: Approximately 0 V - 5 V (pulse)
- When the brake pedal is depressed: Approximately system voltage
Is the check result normal?
Go to Step 9 Go to Step 7
STEP 7. Connector check: C-410 ETACS-ECU connector
STEP 8. Check the wiring harness between C-410 ETACS-ECU connector terminal No.16 and C-29 stoplight relay connector terminal No.3