B2793

B2793 HEATER PUMP

DTC Logic


DTC DETECTION LOGIC







DTC CONFIRMATION PROCEDURE


1. PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT
1.Turn power switch OFF.
2.Set the vehicle to READY.
3.Select "Self Diagnostic Result" mode of "HVAC" using CONSULT.
4.Check DTC.
Is DTC detected?
YES- Refer to "Diagnosis Procedure" .
NO- INSPECTION END


Diagnosis Procedure


1. CHECK HEATER PUMP POWER SUPPLY

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 2.
NO- GO TO 3.

2. CHECK HEATER PUMP GROUND CIRCUIT

Check continuity between heater pump harness connector and ground.





Is the inspection result normal?
YES- Check intermittent incident. Refer to "Intermittent Incident" Intermittent Incident.
NO- Repair harness or connector.

3. CHECK A/C RELAY CIRCUIT

Check A/C relay circuit. Refer to "Diagnosis Procedure" A/C Relay.
Is the inspection result normal?
YES- Repair harness or connector between A/C relay and heater pump.
NO- Repair or replace error-detected parts.