STEP 4. Using scan tool (M.U.T.-III), Check whether the diagnostic trouble code is set again.
Check again if the DTC No.B1E1C is set in the ETACS-ECU.(1) Erase the DTC.
(2) Disconnect connector (a).- High-mounted stop light connector
- Rear combination light (Stop: RH) connector
- rear combination light (Stop: LH) connector
(3) Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(4) Depress the brake pedal.
(5) Check the DTC No.B1E1C is set.
(6) Repeat steps (1) to (5) for parts (b) to (d) to determine a fault cause.
Is the DTC set?
Replace the ETACS-ECU. Replace a defective light (the rear combination light unit or the high-mounted stop light assembly).