Code No. B1061,B1062: Potentiometer system for air outlet changeover damper <RHD>

COMMENTS ON TROUBLE SYMPTOM
This code is set when the mode selection 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 mode selection damper control motor and potentiometer
  • Damaged the wiring harness or connectors
  • Malfunction of the automatic air conditioner control panel (A/C-ECU)

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III data list
Check that the following service data display contents are normal. (Refer to .)

  • Item 14: F.Air outlet c/o potentiometer
  • Item 15: F.Air outlet c/o potentiometer (Target)

Q. Is the check result normal?
Go to Step 5.
Go to Step 2.

STEP 2. Connector check: C-106 A/C-ECU connector and C-04 mode selection damper control motor and potentiometer connector


Q. Is the check result normal?

Go to Step 3.

Repair the connector.

STEP 3. Check the wiring harness between C-106 A/C-ECU connector (terminals 1, 21 and 14) and C-04 mode selection 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 4.

Repair the wiring harness.

STEP 4. Check the mode selection damper control motor and potentiometer.
Refer to .

Q. Is the check result normal?
Go to Step 5.
Replace the mode selection damper control motor and potentiometer.

STEP 5. 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 ).