Blower Motor Circuit
Blower Motor CircuitSYMPTOM:
- Blower motor operation is malfunctioning.
Step 1-2:
Step 2 (Continued)-4:
INSPECTION FLOW
SYSTEM DESCRIPTION
Component Parts
Fan speed control system components are:
- Front air control
- LAN system (PBR built-in mode door motor, air mix door motor and intake door motor)
- Blower motor
- Fan control amplifier
System Operation
COMPONENT DESCRIPTION
Fan Control Amplifier
The fan control amplifier (1) is located on the cooling unit. The fan control amp. receives a gate voltage from the front air control to smoothly maintain the blower fan motor voltage in the 5 to the 12 V range (approx.).
Step 1-2:
Step 2 (Continued)-5:
Step 5 (Continued)-8:
Step 8 (Continued):
DIAGNOSTIC PROCEDURE
SYMPTOM: Blower motor is malfunctioning.
COMPONENT INSPECTION
Blower Motor
Confirm smooth rotation of the blower motor (1).
- Ensure that there are no foreign particles inside the intake unit.