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 11: 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

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.

Q. Is the check result normal?

	This diagnosis is complete.

	Replace the heater control panel assembly (A/C-ECU).