Diagnostic Procedure

1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body. See Figure .

   Refer to GROUND INSPECTION  .

OK or NG

1. OK: go to  2 .
2. NG: Repair or replace ground connections.

Refer to COMPONENT INSPECTION  .

OK or NG

1. OK: go to  3 .
2. NG: Replace engine COOLANT temperature sensor.

When the engine is cold [lower than 70° C (158° F)] condition, grasp lower radiator hose and confirm the engine COOLANT does not flow.

OK or NG

1. OK: go to  4 .
2. NG: Repair or replace thermostat. Refer to THERMOSTAT AND WATER CONTROL VALVE .

Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT  .

1. Inspection end