INSPECTION PROCEDURE 7: 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
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 08: Air outlet c/o damper:

Q. Is the check result normal?

	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 fan mode 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 mode selection damper control motor line between connector and heater control panel assembly (A/C-ECU) connector MD1, MD2 MD4, MD3 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 mode selection damper control motor (Refer to ), 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) (Refer to ).