Manual Air Conditioning

BLOWER MOTOR

Diagnosis Procedure


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. 14 and 16, located in fuse block (J/B)].
NOTE:
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 if a fuse is blown.

3. CHECK BLOWER MOTOR POWER SUPPLY

1.Disconnect blower motor connector.
2.Turn ignition switch ON.
3.Check voltage between 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. .
Is the inspection result normal?
YES- Repair harness or connector between blower motor and fuse.
NO- Replace blower relay.

5. CHECK FAN SWITCH GROUND CIRCUIT FOR OPEN

1.Turn ignition switch OFF.
2.Disconnect A/C control connector.
3.Check continuity between A/C control harness connector and ground.





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

6. CHECK FAN SWITCH 4 POSITION CIRCUIT FOR OPEN

Check continuity between A/C control harness connector and blower motor harness connector.





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

7. CHECK BLOWER FAN RESISTOR POWER SUPPLY

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





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

8. CHECK BLOWER FAN RESISTOR

1.Turn the ignition switch OFF.
2.Check blower fan resistor. .
Is the inspection result normal?
YES- GO TO 9.
NO- Replace blower fan resistor. Removal And Installation.

9. CHECK FAN SWITCH 1, 2, 3 POSITION CIRCUIT FOR OPEN

Check continuity between A/C control harness connector and blower fan resistor.





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

10. CHECK FAN SWITCH

Check fan switch. .
Is the inspection result normal?
YES- Replace blower motor. Removal And Installation.
NO- Replace A/C control. Removal And Installation.


Component Inspection (Blower Motor)


1. CHECK BLOWER MOTOR

1.Remove blower motor. Removal And Installation.
2.Check that there is not any mixing foreign object in the blower motor.
Is the inspection result normal?
YES- GO TO 2.
NO- Replace blower motor. Removal And Installation.

2. CHECK BLOWER MOTOR

Check that there is not breakage or damage in the blower motor.
Is the inspection result normal?
YES- GO TO 3.
NO- Replace blower motor. Removal And Installation.

3. CHECK BLOWER MOTOR

Check that blower motor turns smoothly.
Is the inspection result normal?
YES- INSPECTION END
NO- Replace blower motor. Removal And Installation.


Component Inspection (Blower Relay)


1. CHECK BLOWER RELAY

1.Remove blower relay. Fuse, Fusible Link And Relay Box.





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 (Blower Fan Resistor)


1. CHECK BLOWER FAN RESISTOR

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





Is the inspection result normal?
YES- INSPECTION END
NO- Replace blower fan resistor. Removal And Installation.


Component Inspection (Fan Switch)


1. CHECK FAN SWITCH

Check continuity between A/C control terminals.





Is the inspection result normal?
YES- INSPECTION END
NO- Replace A/C control. Removal And Installation.