Heater Pump

HEATER PUMP

Component Function Check


1. CHECK HEATER PUMP OPERATING CONDITION

With CONSULT
1.Select "ACTIVE TEST" mode of "HVAC" using CONSULT.
2.Confirm heater pump operation by the sound or hose pulsation.
Is the inspection result normal?
YES- INSPECTION END
NO- .


Diagnosis Procedure


1. CHECK HEATER PUMP POWER SUPPLY-I

1.Turn power switch OFF.
2.Disconnect heater pump connector.
3.Turn power switch ON.
4.Check voltage between heater pump harness connector and ground.





Is the inspection result normal?
YES- GO TO 4.
NO- GO TO 2.

2. CHECK FUSE

1.Turn power switch OFF.
2.Check 10 A fuse [No.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 fuse after repairing the applicable circuit.

3. CHECK HEATER PUMP POWER SUPPLY-II

1.Turn power switch OFF.
2.Disconnect A/C auto amp. connector and fuse block (J/B) connector.
3.Check continuity between heater pump harness connector and fuse block (J/B) harness connector.





Is the inspection result normal?
YES- GO TO 4.
NO- Repair harness or connector.

4. CHECK HEATER PUMP GROUND CIRCUIT

Check continuity between heater pump harness connector and ground.





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

5. CHECK HEATER PUMP CONTROL CIRCUIT

1.Connect heater pump connector.
2.Disconnect heater A/C auto amp. connector.
3.Turn power switch ON.
4.Check voltage between A/C auto amp. harness connector and ground.





Is the inspection result normal?
YES- GO TO 6.
NO- Check harness between A/C auto amp. and heater pump, and replace heater pump if there is not malfunction.

6. CHECK A/C AUTO AMP. INPUT SIGNAL

1.Connect heater pump and A/C auto amp. connector.
2.Turn power switch ON.
3.Check signal between A/C auto amp. harness connector and ground with oscilloscope.





Is the inspection result normal?
YES- Replace heater pump.
NO- Replace A/C auto amp.. Removal and Installation.