INSPECTION PROCEDURE 11: Air outlets changeover is impossible.








COMMENTS ON TROUBLE SYMPTOM
If the air conditioner outlets changeover is impossible, the mode selection damper control motor or the A/C-ECU may be faulty.

PROBABLE CAUSES

  • mode selection damper control motor failed
  • Malfunction of A/C-ECU

DIAGNOSTIC PROCEDURE

STEP 1. M.U.T.-III diagnosis code
Check that the diagnosis code related to the air conditioner is not set.

Q. Is the diagnosis code set?
Carry out the diagnosis code procedures. Refer to .
Go to Step 2.

STEP 2. M.U.T.-III actuator test
Carry out the actuator test. (Refer to ).

  • Item 08: Air outlet c/o dumper: (Select "position reset".)

Q. Is the check result normal?
This diagnosis is complete.
Go to Step 3.

STEP 3. Connector check: C-109 mode selection damper control motor connector and C-110 A/C-ECU connector

Q. Is the check result normal?
Go to Step 4.
Repair the connector concerned.

STEP 4. Check the wiring harness wires between C-109 mode selection damper control motor connector (terminals 1, 4, 5, 2 and 3) and C-110 A/C-ECU connector (terminals 33, 30, 32, 31 and 29).

  • Check the input line for open circuit.

Q. Is the check result normal?
Go to Step 5.
Repair the wiring harness.

STEP 5. Replace the mode selection damper control motor, and recheck the trouble symptom.
Check that the air outlets can be changed.
note Whenever the motor is replaced, initialise the motor position by using the Actuator Test.

Q. Is the check result normal?
This diagnosis is complete.
Replace the A/C-ECU.