A/C Relay

A/C RELAY

Diagnosis Procedure


1. CHECK A/C RELAY CONTROL CIRCUIT

1.Turn power switch OFF.
2.Remove A/C relay.
3.Check the voltage between A/C relay harness connector terminals.





4.Turn power switch ON.
5.Check the voltage between A/C relay harness connector terminals.





Is the inspection result normal?
YES- GO TO 8.
NO- GO TO 2.

2. CHECK SSOFF RELAY POWER SUPPLY-I

Check the voltage A/C relay harness connector and ground.





Is the inspection result normal?
YES- GO TO 5.
NO- GO TO 3.

3. CHECK SSOFF RELAY POWER SUPPLY-II

Check the voltage between IPDM E/R harness connector and ground.





Is the inspection result normal?
YES- GO TO 4.
NO- Check SSOFF relay routing circuit. Refer to "Diagnosis Procedure" Ssoff Relay.

4. CHECK A/C RELAY POWER SUPPLY CIRCUIT

1.Turn power switch OFF.
2.Disconnect IPDM E/R harness connector.
3.Check the continuity between A/C relay harness connector and IPDM E/R harness connector.





Is the inspection result normal?
YES- Check intermittent incident. Refer to "Intermittent Incident" Intermittent Incident.
NO- Repair or replace error-detected parts.

5. CHECK A/C RELAY CONTROL SIGNAL CIRCUIT

1.Turn power switch OFF.
2.Disconnect VCM harness connector.
3.Check the continuity between A/C relay harness connector and VCM harness connector.





4.Also check harness for short to ground and short to power.
Is the inspection result normal?
YES- GO TO 6.
NO- Repair or replace error-detected parts.

6. CHECK VCM GROUND CIRCUIT

Check the continuity between VCM harness connector and ground.





Is the inspection result normal?
YES- GO TO 7.
NO- Repair or replace error-detected parts.

7. CHECK INTERMITTENT INCIDENT

Check intermittent incident. Refer to "Intermittent Incident" Intermittent Incident.
Is the inspection result normal?
YES- Replace VCM. Refer to "Removal and Installation" Removal And Installation.
NO- Repair or replace error-detected parts.

8. CHECK 12V BATTERY POWER SUPPLY

1.Turn power switch OFF.
2.Check the voltage between A/C relay harness connector and ground.





Is the inspection result normal?
YES- GO TO 11.
NO- GO TO 9.

9. CHECK FUSE

1.Turn power switch OFF.
2.Pull out #32 fuse.
3.Check that the fuse is not fusing.
Is the inspection result normal?
YES- GO TO 10.
NO- Replace the fuse after repairing the applicable circuit.

10. CHECK 12V BATTERY POWER SUPPLY CIRCUIT

Check the continuity between A/C relay harness connector and fuse terminal.





Is the inspection result normal?
YES- Check intermittent incident. Refer to "Intermittent Incident" Intermittent Incident.
NO- Repair or replace error-detected parts.

11. CHECK A/C RELAY

Refer to "Component Inspection (A/C Relay)" .
Is the inspection result normal?
YES- INSPECTION END
NO- Replace A/C relay.


Component Inspection (A/C Relay)


1. CHECK A/C RELAY

1.Turn power switch OFF.
2.Remove A/C relay.





3.Check the continuity between A/C relay terminals under the following conditions.





Is the inspection result normal?
YES- INSPECTION END
NO- Replace A/C relay.