Component Function Check

BLOWER MOTOR CONTROL SYSTEM


Front Blower Motor Component Function Check


INSPECTION FLOW
1.CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - FRONT BLOWER
1. Push blower motor (+) switch. Blower motor should operate.
2. Rotate the front blower control dial clockwise, and continue checking blower speed and fan symbol until all speeds are checked.
Can the symptom be duplicated?
YES - GO TO 3.
NO - GO TO 2.
2.CHECK FOR ANY SYMPTOMS
Perform a complete operational check for any symptoms. Refer to Operational Check (Front).
Does another symptom exist?
YES - Refer to How to Perform Trouble Diagnosis For Quick and Accurate Repair.
NO - System OK.
3.CHECK FOR SERVICE BULLETINS
Check for any service bulletins.
>> GO TO 4.
4.PERFORM A/C AUTO AMP. SELF-DIAGNOSIS
Perform self-diagnosis to check for any codes. Refer to A/C Auto AMP. Self-Diagnosis.
Are any self-diagnosis codes present?
YES - Refer to A/C System Self-Diagnosis Code Chart.
NO - GO TO 5.
5.PERFORM A/C AND AV SWITCH ASSEMBLY SELF-DIAGNOSIS
Perform self-diagnosis to check the A/C and AV switch assembly. Refer to A/C and AV Switch Assembly Self-Diagnosis.
Is the inspection results normal?
YES - GO TO 6.
NO - Replace A/C and AV switch assembly. Refer to Service and Repair.
6.CHECK BLOWER MOTOR OPERATION
Check and verify blower motor operates manually in all speeds.
Does blower motor operate in all speeds?
YES - GO TO 7.
NO - Refer to Diagnosis Procedure.
7.CHECK ENGINE COOLANT TEMPERATURE SENSOR CIRCUIT
Check engine coolant temperature sensor circuit. Refer to P0117.
Is the inspection results normal?
YES - GO TO 8.
NO - Replace engine coolant temperature sensor.
8.RECHECK FOR ANY SYMPTOMS
Perform a complete operational check for any symptoms. Refer to Operational Check (Front).
Does another symptom exist?
YES - Refer to How to Perform Trouble Diagnosis For Quick and Accurate Repair .
NO - Replace A/C auto amp. Refer to Service and Repair.