INSPECTION PROCEDURE 5: The blower air volume cannot be changed.

[55B] AUTOMATIC AIR CONDITIONER - - TROUBLESHOOTING - SYMPTOM PROCEDURES - INSPECTION PROCEDURE 5: The blower air volume cannot be changed.



INSPECTION PROCEDURE 5: The blower air volume cannot be changed.


	COMMENTS ON TROUBLE SYMPTOM If the blower air volume can not be changed when the blower switch is operated, the circuit between blower motor and A/C-ECU may be defective.
	POSSIBLE CAUSES Blower motor (blower linear controller) Damaged the wiring harness or connectors Malfunction of the automatic air conditioner control panel (A/C-ECU)
	DIAGNOSIS

	Step 1. MUT-II/III actuator test Carry out the actuator test. Item 01, 02, 03, 04: Blower motor Q: Does the blower motor work normally? YES: Replace the automatic air conditioner control panel (A/C-ECU) NO: Go to Step 2 .
	Step 2. Connector check: C-27 A/C-ECU connector and C-32 blower linear controller connector Q: Is the check result normal? YES: Go to Step 3 . NO: Repair the connector.
	Step 3. Check the wiring harness between C-27 A/C-ECU connector terminal No.2 and C-32 blower linear controller connector terminal No.5. Check the input line for open or short circuit. Q: Is the check result normal? YES: Replace the air conditioner control panel (A/C-ECU) or the blower motor (blower linear controller). NO: Repair the wiring harness.

[55B] AUTOMATIC AIR CONDITIONER - - TROUBLESHOOTING - SYMPTOM PROCEDURES - INSPECTION PROCEDURE 5: The blower air volume cannot be changed.