INSPECTION PROCEDURE 5: The Inside/Outside Air Changeover is impossible.

COMMENTS ON TROUBLE SYMPTOM

If the air recirculation cannot be changed by using the inside air/outside air changeover switch, the inside air/outside air changeover motor system may be faulty.

PROBABLE CAUSES

Malfunction of the outside/inside air selection damper control motor
Damaged wiring harness or connectors
Malfunction of the heater controller assembly (A/C-ECU)

DIAGNOSIS PROCEDURE

STEP 1. Check the operation of the heater control panel assembly (A/C-ECU)

Check that the A/C switch, rear window defogger switch and air volume control dial can operate.

Q. Is the check result normal?

	Go to Step 2.

	INSPECTION PROCEDURE 15: Refer to heater control panel assembly (A/C-ECU) power supply system .

STEP 2. 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 3.

STEP 3. M.U.T.-III actuator test

Carry out the actuator test. (Refer to

Item No.5: In/out select damper (Select "position reset".)

Q. Does the blower motor work normally?

	This diagnosis is complete.

	Go to Step 4.

STEP 4. Check of open circuit in F/RA, F/RA’ F/RB and F/RB’ line between outside/inside air selection damper control motor and heater control panel assembly (A/C-ECU) connector.

Q. Is the check result normal?

	Go to Step 5.

	Repair the connector(s) or wiring harness.

STEP 5. Replace the air outside/inside air circulation switching damper motor, and then recheck the trouble symptom.

Check to see that the outside air/inside air circulation switching damper motor operates normally.

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 control panel assembly (A/C-ECU).