Manual Air Conditioner

WATER VALVE CIRCUIT


Water Valve Diagnosis Procedure

Regarding Wiring Diagram information, Electrical Diagrams.

DIAGNOSTIC PROCEDURE FOR WATER VALVE
1.CHECK WATER VALVE POWER AND GROUND CIRCUITS





1. Disconnect water valve connector F68.
2. Turn ignition switch ON.
3. Rotate temperature control dial (driver) to 32�C (90�F).
4. Check voltage between water valve harness connector F68 terminal 1 and terminal 2 while rotating temperature control dial
(driver) to 18�C (60�F).





Is the inspection result normal?
YES - GO TO 3.
NO - GO TO 2.
2.CHECK WATER VALVE CONTROL OUTPUT CIRCUIT





1. Turn ignition switch OFF.
2. Disconnect A/C auto amp. connector M50.
3. Check continuity between water valve harness connector F68
(A) terminal 2 and A/C auto amp. harness connector M50 (B) terminal 46.

2 - 46 : Continuity should exist.

4. Check continuity between water valve harness connector F68 terminal 2 and ground.

2 - Ground : Continuity should not exist.

Is the inspection result normal?
YES - Replace A/C auto amp. Service and Repair.
NO - Repair harness or connector.
3.CHECK WATER VALVE POWER AND GROUND CIRCUITS
1. Rotate temperature control dial (driver) to 18�C (60�F).
2. Check voltage between water valve harness connector F68 terminal 1 and terminal 2 while rotating temperature control dial





(driver) to 32�C (90�F).





Is the inspection result normal?
YES - Replace the water valve.
NO - GO TO 4.
4.CHECK WATER VALVE CONTROL OUTPUT CIRCUIT





1. Turn ignition switch OFF.
2. Disconnect A/C auto amp. connector M50.
3. Check continuity between water valve harness connector F68
(A) terminal 1 and A/C auto amp. harness connector M50 (B) terminal 45.

1 - 45 : Continuity should exist.

4. Check continuity between water valve harness connector F68
(A) terminal 1 and ground.

1 - Ground : Continuity should not exist.

Is the inspection result normal?
YES - Replace A/C auto amp. Service and Repair.
NO - Repair harness or connector.