Manual Air Conditioning

BLOWER MOTOR

Description


COMPONENT DESCRIPTION

Blower Motor





The blower motor (1) utilizes a brush motor with a sirocco fan type.










Blower Motor Circuit
Fan Control Amp.





- The fan control amp. is located on the A/C unit assembly.
- The fan control amp. receives a gate voltage from the A/C amp. to stepless maintain the blower fan motor voltage in the approximately 4 to 12 volt range.


Component Function Check


1. CONFIRM SYMPTOM BY PERFORMING THE FOLLOWING OPERATIONAL CHECK

1.Turn fan control dial clockwise to 1st speed. Blower should operate on low speed.
2.Turn fan control dial clockwise to 2nd speed, and continue checking blower speed until all speeds are checked.
Is the inspection result normal?
YES- INSPECTION END
NO- Go to diagnosis procedure. .


Diagnosis Procedure


1. CHECK POWER SUPPLY FOR BLOWER MOTOR

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





Is the inspection result normal?
YES- GO TO 2.
NO- GO TO 6.

2. CHECK POWER SUPPLY FOR FAN CONTROL AMP.

Check voltage between fan control amp. harness connector and ground.





Is the inspection result normal?
YES- GO TO 3.
NO- GO TO 10.

3. CHECK BLOWER MOTOR CONTROL SIGNAL

1.Turn mode control dial to VENT.
2.Turn fan control dial to 1st speed.
3.Check voltage between fan control amp. harness connector and ground.





Is the inspection result normal?
YES- GO TO 4.
NO-1- In the case of less than approximately 2.5 V: GO TO 11.
NO-2- In the case of more than approximately 8 V: Replace A/C control.

4. CHECK FAN CONTROL AMP. GROUND CIRCUIT

1.Disconnect fan control amp. connector.
2.Check continuity between fan control amp. harness connector and ground.





Is the inspection result normal?
YES- GO TO 5.
NO- Repair harness or connector.

5. CHECK BLOWER MOTOR FEEDBACK SIGNAL

1.Reconnect fan control amp. connector.
2.Turn ignition switch ON.
3.Turn fan control dial to 1st speed.
4.Check voltage between A/C amp. harness connector and ground.





Is the inspection result normal?
YES- Replace A/C control.
NO- Repair harness or connector.

6. CHECK POWER VOLTAGE OF BLOWER RELAY

1.Turn ignition switch OFF.
2.Remove blower relay. Fuse Block - Junction Box (J/B).
3.Turn ignition switch ON.
4.Check voltage between blower relay fuse block terminals and ground. Description and Operation for relay terminal assignment.





Is the inspection result normal?
YES- GO TO 8.
NO- GO TO 7.

7. CHECK IGNITION SWITCH CIRCUIT

Check ignition switch circuit. With Intelligent Key System (WITH INTELLIGENT KEY SYSTEM), Without Intelligent Key System (WITHOUT INTELLIGENT KEY SYSTEM).
Is the inspection result normal?
YES- Repair harness or connector.
NG- Replace malfunctioning parts.

8. CHECK BLOWER RELAY

1.Turn ignition switch OFF.
2.Install blower relay. Fuse Block - Junction Box (J/B).
3.Check operation sound of the blower relay after switching ignition switch ON.
Is the inspection result normal?
YES- GO TO 9.
NO- Replace blower relay.

9. CHECK FUSE

Check 15A fuse [Nos. 15 and 16, located in the fuse block (J/B)]. Fuse Block - Junction Box (J/B).
Is the inspection result normal?
YES- Repair harness or connector.
NG- Replace fuse.

10. CHECK CIRCUIT CONTINUITY BETWEEN BLOWER MOTOR AND FAN CONTROL AMP.

1.Turn ignition switch OFF.
2.Disconnect fan control amp. connector.
3.Check continuity between blower motor harness connector and fan control amp. harness connector.





Is the inspection result normal?
YES- Check blower motor. .
NO- Repair harness or connector.

11. CHECK CIRCUIT FAN CONTROL AMP.

Check fan control amp. .
Is the inspection result normal?
YES- Replace A/C control.
NO- Replace fan control amp.


Component Inspection (Blower Motor)


1. CHECK BLOWER MOTOR

1.Turn ignition switch OFF.
2.Remove blower motor. Exploded View.





3.Confirm smooth rotation of the blower motor.
Is the inspection result normal?
YES- INSPECTION END
NO- Replace blower motor.


Component Inspection (Fan Control Amp.)


1. CHECK FAN CONTROL AMP.

1.Turn ignition switch ON.
2.Remove fan control amp. Exploded View.
3.Check continuity between the fan control amp. terminals using analog circuit tester.





Is the inspection result normal?
YES- INSPECTION END
NO- Replace fan control amp.