Code No. U1210: Brake Lamp Switch Status Error




TROUBLE JUDGMENT


Check Conditions
  1. Code No. U0121: ASC-ECU Time-out
  2. Code No. U0141: ETACS-ECU Time-out
Judgement Criterion

COMMENTS ON TROUBLE SYMPTOM


Current malfunction
Past malfunction
FAIL-SAFE AND BACKUP FUNCTION

PROBABLE CAUSES




DIAGNOSIS PROCEDURE


STEP 1. M.U.T.-III diagnosis code for other systems


Confirm the diagnosis code is set from the ASC-ECU.

Q. Is the check result normal?

Perform troubleshooting of the ASC-ECU (Refer to GROUP 35C - Troubleshooting - Diagnosis Code Chart ).
Go to Step 2.

STEP 2. M.U.T.-III diagnosis code



  • Item 30: Brake lamp switch
OK: ON (depress the brake pedal), OFF (release the brake pedal)

Q. Is the diagnosis code set?

Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions).
Go to Step 3.

STEP 3. M.U.T.-III diagnosis code



  • Check the ETACS-ECU service data (Refer to GROUP 54A - ETACS - Data List Reference Table).
  • Item 290: Stop lamp switch
OK: ON (depress the brake pedal), OFF (release the brake pedal)

Q. Is the diagnosis code set?

Go to Step 5.
Go to Step 4.

STEP 4. Check stop lamp switch


Check stop lamp switch (Refer to GROUP 35A - Brake Pedal - Stop Lamp Switch Check).

Q. Is the diagnosis code set?

Check if the circuits related to the stop lamp switch are normal.
Replace the AS&G OFF switch.

STEP 5. M.U.T.-III diagnosis code



  • Reconfirmation of diagnosis code.
Confirm again the diagnosis code is set from the AS&G-ECU.

  1. Erase the set diagnosis code.
  2. Ignition switch: "LOCK" (OFF) → "ON"
  3. Confirm whether the diagnosis code is set.

Q. Is the diagnosis code set?

Replace the AS&G-ECU.
Check end.