Code No. B1041,B1042: Potentiometer system for the front air mix damper








COMMENTS ON TROUBLE SYMPTOM
This code is set when the air mixing damper control motor potentiometer does not send any signal to the A/C-ECU due to short or open circuit.

PROBABLE CAUSES

  • Malfunction of the front air mixing damper control motor and potentiometer
  • Damaged the wiring harness or connectors
  • Malfunction of the automatic A/C control panel (A/C-ECU)

DIAGNOSIS PROCEDURE

STEP 1. Connector check: D-08 A/C-ECU connector and D-201 front air mixing damper control motor and potentiometer connector

Q. Is the check result normal?
Go to Step 2.
Repair the connector.

STEP 2. Check the wiring harness between D-08 A/C-ECU connector (terminals 30, 23 and 8) and D-201 front air mixing damper control motor and potentiometer connector (terminals 7, 3 and 5).

  • Check the potentiometer power supply, earth and signal line for open or short circuit.

Q. Is the check result normal?
Go to Step 3.
Repair the wiring harness.

STEP 3. Check the front air mixing damper control motor and potentiometer.
Refer to .

Q. Is the check result normal?
Go to Step 4.
Replace the front air mixing damper control motor and potentiometer.

STEP 4. M.U.T.-III diagnosis code

Q. Is the diagnosis code set?
Replace the automatic A/C control panel (A/C-ECU).
The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).