Front Blower Motor

FRONT BLOWER MOTOR

Description

The front blower motor utilizes a brush-less motor with a rotating magnet. Quietness is improved over previous motors where the brush was the point of contact and the coil rotated.


Diagnosis Procedure

Regarding Wiring Diagram information, refer to "Wiring Diagram" Manual Air Conditioning System or "Wiring Diagram" Manual Heater System.

1. CHECK SYMPTOM

Check symptom (A or B).





Which symptom is detected?
A- GO TO 2.
B- GO TO 7.

2. CHECK FUSE

1.Turn ignition switch OFF.
2.Check 15A fuses (Nos. 20 and 22, located in fuse block (J/B)].
NOTE:
Refer to "Terminal Arrangement" Fuse Block - Junction Box (J/B).
Is the inspection result normal?
YES- GO TO 3.
NO- Replace the blown fuse after repairing the affected circuit.

3. CHECK FRONT BLOWER MOTOR POWER SUPPLY

1.Disconnect front blower motor connector.
2.Turn ignition switch ON.
3.Check voltage between front blower motor harness connector and ground.





Is the inspection result normal?
YES- GO TO 5.
NO- GO TO 4.

4. CHECK BLOWER RELAY

1.Turn ignition switch OFF.
2.Check blower relay. Refer to "Component Inspection (Blower Relay)" .
Is the inspection result normal?
YES- Repair harness or connector between front blower motor and fuse.
NO- Replace blower relay.

5. CHECK FAN SWITCH GROUND CIRCUIT FOR OPEN

1.Turn ignition switch OFF.
2.Disconnect front air control connector.
3.Check continuity between front air control harness connector and ground.





Is the inspection result normal?
YES- GO TO 6.
NO- Repair harness or connector.

6. CHECK FAN SWITCH 4TH POSITION CIRCUIT FOR OPEN

Check continuity between front air control harness connector and front blower motor harness connector.





Is the inspection result normal?
YES- GO TO 10.
NO- Repair the harness or connector.

7. CHECK FRONT BLOWER MOTOR RESISTOR POWER SUPPLY

1.Turn ignition switch OFF.
2.Disconnect front blower motor resistor connector.
3.Turn ignition switch ON.
4.Check voltage between front blower motor resistor harness connector and ground.





Is the inspection result normal?
YES- GO TO 8.
NO- Repair harness or connector between front blower motor resistor and front blower motor.

8. CHECK FAN SWITCH 1ST, 2ND, AND 3RD POSITION CIRCUIT FOR OPEN

1.Turn ignition switch OFF.
2.Disconnect front air control.
3.Check continuity between front air control harness connector and front blower motor resistor.





Is the inspection result normal?
YES- GO TO 9.
NO- Repair harness or connector.

9. CHECK FRONT BLOWER MOTOR RESISTOR

Check front blower motor resistor. Refer to "Component Inspection (Front Blower Motor Resistor)" .
Is the inspection result normal?
YES- GO TO 10.
NO- Replace front blower motor resistor. Refer to "Removal and Installation" Removal and Installation.

10. CHECK FAN SWITCH

Check fan switch. Refer to "Component Inspection (Fan Switch)" .
Is the inspection result normal?
YES- Replace front blower motor. Refer to "Removal and Installation" Removal And Installation.
NO- Replace front air control. Refer to "Removal and Installation" Removal and Installation.


Component Inspection (Front Blower Motor)


1. CHECK FRONT BLOWER MOTOR

1.Connect battery voltage to terminal 1 of front blower motor.
2.Connect ground to terminal 2 of front blower motor.
Does the front blower motor operate?
YES- Intermittent incident. Refer to "Intermittent Incident" Intermittent Incident.
NO- Replace front blower motor. Refer to "Removal and Installation" Removal And Installation.


Component Inspection (Blower Relay)


1. CHECK BLOWER RELAY

1.Remove blower relay. Refer to "Terminal Arrangement" Fuse Block - Junction Box (J/B).





2.Check continuity between blower relay terminal 3 and 5 when the voltage is supplied between terminal 1 and 2.





Is the inspection result normal?
YES- Inspection End.
NO- Replace blower relay.


Component Inspection (Front Blower Motor Resistor)


1. CHECK FRONT BLOWER MOTOR RESISTOR

1.Disconnect front blower motor resistor connector.
2.Check resistance between front blower motor resistor terminals. Refer to applicable table for the normal value.





Is the inspection result normal?
YES- Inspection End.
NO- Replace front blower motor resistor. Refer to "Removal and Installation" Removal and Installation.


Component Inspection (Fan Switch)


1. CHECK FAN SWITCH

1.Remove front air control. Refer to "Removal and Installation" Removal and Installation.
2.Check continuity between front air control terminals.





Is the inspection result normal?
YES- Inspection End.
NO- Replace front air control. Refer to "Removal and Installation" Removal and Installation.