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

Carry out the actuator test (Refer to

Item No.5: In/out select damper

Q. Does the outside/inside air selection damper control motor work normally?

	Go to Step 2.

	Go to Step 4.

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. Check the operation of the heater controller assembly (A/C-ECU).

Check that the outside/inside air changeover switch can operate.

Q. Is the check result normal?

	Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).

	Refer to inspection procedure 9 "heater control panel assembly (A/C-ECU) power supply system" .

STEP 4. Check of open circuit in outside/inside air selection damper control motor line between outside/inside air selection damper control motor connector and heater control panel assembly (A/C-ECU) connector FR1, FR2 FR4, FR3 and AC+B terminals.

note

Before the wiring harness check, check the joint connector.

Q. Is the check result normal?

	Go to Step 5.

	Repair or replace the connector(s) or wiring harness.

STEP 5. Replace the air outside/inside air selection damper motor (Refer to ), and then recheck the trouble symptom.

Check to see that the outside/inside air selection 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 controller assembly (A/C-ECU) (Refer to ).