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

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

POSSIBLE CAUSES

  • Malfunction of the rear mode selection damper control motor and potentiometer
  • Malfunction of the automatic A/C control panel (A/C-ECU)
  • Damaged the wiring harness or connectors

DIAGNOSIS PROCEDURE

STEP 1. Connector check: C-43 A/C-ECU connector and C-38 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 C-43 A/C-ECU connector (terminals 12 and 1) and C-38 mode selection damper control motor and potentiometer connector (terminals 1 and 3).





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

Q. Is the check result normal?

Go to Step 3.

Repair the wiring harness.

STEP 3. Check the 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 automatic air conditioner control panel (A/C-ECU).
The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).