Code No. B1065: Motor drive system for front mode selection damper












COMMENTS ON TROUBLE SYMPTOM
This code is set when the front mode selection damper cannot be rotated to the preset opening angle.

PROBABLE CAUSES

  • Malfunction of the front mode selection damper control motor and potentiometer
  • Malfunction of the A/C-ECU
  • Damaged the wiring harness or connectors

DIAGNOSIS PROCEDURE

STEP 1. Connector check: D-08 A/C-ECU connector and D-101 front mode selection 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 36 and 35) and D-101 front mode selection damper control motor and potentiometer connector (terminals 1 and 2).

  • Check the motor activating lines for open or short circuit.

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

STEP 3. Check the rear mode selection damper control motor and potentiometer.
Refer to .

Q. Is the check result normal?
Go to Step 4.
Replace the mode selection damper control motor and potentiometer.

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

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