Manual A/C (Type 1)

WATER VALVE CIRCUIT

Description


COMPONENT DESCRIPTION

Water Valve





The water valve (1) cuts the flow of engine coolant to the heater core to allow for maximum cooling during A/C operation. It is controlled by the front air control.


Water Valve Diagnosis Procedure

Regarding Wiring Diagram information, With 2 Control Dial System.

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 to maximum heat.
4.Check voltage between water valve harness connector F68 terminal 1 and terminal 2 while rotating temperature control dial to maximum cold.





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 front air control connector M181.
3.Check continuity between water valve harness connector F68
(A) terminal 2 and front air control harness connector M181 (B)
terminal 42.
2 - 42: Continuity should exist.
4.Check continuity between water valve harness connector F68
(A) terminal 2 and ground.
2 - Ground: Continuity should not exist.
Is the inspection result normal?
YES- Replace front air control. Service and Repair.
NO- Repair harness or connector.

3. CHECK WATER VALVE POWER AND GROUND CIRCUITS






1.Rotate temperature control dial to maximum cold.
2.Check voltage between water valve harness connector F68 terminal 1 and terminal 2 while rotating temperature control dial to maximum heat.





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 front air control connector M181.
3.Check continuity between water valve harness connector F68
(A) terminal 1 and front air control harness connector M181 (B)
terminal 41.
1 - 41: 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 front air control. Service and Repair.
NO- Repair harness or connector.