Rear A/C Solenoid Valve

REAR A/C SOLENOID VALVE





Diagnosis Procedure
1.CHECK FUSE
1. Turn ignition switch OFF.
2. Check 10A fuse [No.4, located in fuse block (J/B)].

NOTE:
Fuse Block - Junction Box (J/B).
Is the inspection result normal?
YES - GO TO 2.
NO - Replace the blown fuse after repairing the affected circuit if a fuse is blown.
2.CHECK REAR A/C SOLENOID VALVE POWER SUPPLY
1. Disconnect rear A/C solenoid valve connector.
2. Turn ignition switch ON and front air conditioning system ON.
3. Check voltage between rear A/C solenoid valve harness connector and ground when rear blower motor is operated.





Is the inspection result normal?
YES - GO TO 3.
NO - GO TO 4.
3.CHECK REAR A/C SOLENOID VALVE GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between rear A/C solenoid valve harness connector and ground.





Is the inspection result normal?
YES - Replace rear expansion valve assembly. Rear A/C Unit.
NO - Repair harness or connector.
4.CHECK REAR A/C RELAY POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect rear A/C relay connector.
3. Turn ignition switch ON.
4. Check voltage between rear A/C relay harness connector and ground.





Is the inspection result normal?
YES - GO TO 5.
NO - Repair harness or connector between rear A/C relay and fuse block (J/B).
5.CHECK REAR A/C RERAY CONTROL CIRCUIT FOR OPEN
1. Turn ignition switch OFF.
2. Disconnect A/C auto amp. connector.
3. Check continuity between rear A/C relay harness connector and A/C auto amp. harness connector.





Is the inspection result normal?
YES - GO TO 6.
NO - Repair harness or connector.
6.CHECK REAR A/C RELAY CONTROL CIRCUIT FOR SHORT
Check continuity between rear A/C relay harness connector and ground.





Is the inspection result normal?
YES - GO TO 7.
NO - Repair harness or connector.
7.CHECK REAR A/C SOLENOID VALVE POWER SUPPLY CIRCUIT
Check continuity between rear A/C relay harness connector and rear A/C solenoid valve harness connector.





Is the inspection result normal?
YES - GO TO 8.
NO - Repair harness or connector.
8.CHECK REAR A/C RELAY
Check rear A/C relay. SEE Component Inspection.
Is the inspection result normal?
YES - Replace A/C auto amp.. Service and Repair.
NO - Replace rear A/C relay.




Component Inspection
1.CHECK REAR A/C RELAY
1. Remove rear A/C relay.





2. Check continuity between the rear A/C 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 rear A/C relay.