MOTOR-BLOWER
DESCRIPTION
The blower motor (1) is used to control the velocity of air moving through the HVAC housing by spinning the blower wheel (2) within the HVAC air inlet housing at the selected speed.
The blower motor is a 12-volt, direct current (DC) motor mounted within a plastic housing with an integral wire harness connector (3) and three mounting tabs (4). The squirrel cage-type blower wheel is secured to the blower motor shaft and is positioned within the air inlet housing on the passenger side of the HVAC housing.
OPERATION
The blower motor is used to control the velocity of air moving through the HVAC housing by spinning the blower wheel within the HVAC air inlet housing at the selected speed.
The blower motor will operate whenever the ignition switch is in the Run position and the blower motor control is in any position except Off. The blower motor receives battery current through the totally integrated power module (TIPM) whenever the ignition switch is in the Run position.
Blower motor speed is controlled by regulating the ground path through or around the blower motor resistor and through the blower motor control located within the A/C-heater control.
The blower motor can be accessed for service from underneath the instrument panel.
NOTE: The blower motor is supplied with a 12V feed from the TIPM, through the blower motor resistor, whenever the ignition switch is in the RUN position. Due to an open circuit condition within the blower motor control switch the TIPM is UNABLE to detect an OPEN circuit for the blower motor.
The blower motor control system is diagnosed using a scan tool (refer to 24 - HVAC Electrical Diagnostics for more information).
The blower motor and blower motor wheel are factory balanced as an assembly and cannot be adjusted or repaired and must be replaced if found inoperative or damaged.
REMOVAL
NOTE: The blower motor is located on the bottom of the passenger side of the HVAC housing. The blower motor can be removed from the vehicle without having to remove the HVAC housing.
NOTE: LHD model shown. RHD model similar.
1. Disconnect and isolate the negative battery cable.
2. From underneath the instrument panel, disconnect the instrument panel wire harness connector (3) from the blower motor (4).
3. Remove the three screws (2) that secure the blower motor to the bottom of the HVAC housing (1) and remove the blower motor.
INSTALLATION
NOTE: LHD model shown. RHD model similar.
1. Position the blower motor (4) into the bottom of the HVAC housing (1).
2. Install the three screws (2) that secure the blower motor to the HVAC housing. Tighten the screws to 1.2 N·m (10 in. lbs.).
3. Connect the instrument panel wire harness connector (3) to the blower motor.
4. Reconnect the negative battery cable.