INSPECTION PROCEDURE 8: 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 heater controller assembly (A/C-ECU) may be faulty.

PROBABLE CAUSES

Malfunction of the mode selection damper control motor
Malfunction of the heater controller assembly (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 damper: (Select "position reset".)

Q. Is the check result normal?

	This diagnosis is complete.

	Go to Step 3.

STEP 3. Check of open circuit in IG1, M/MA, M/MA’ M/MB and M/MB’ line between mode selection damper control motor and heater control panel assembly (A/C-ECU) connector.

Q. Is the check result normal?

	Go to Step 4.

	Repair the connector(s) or wiring harness.

STEP 4. 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 heater controller assembly (A/C-ECU).