Diagnosis Procedure

CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body. Refer to , "GROUND INSPECTION ".
Fig 1: Identifying Body Ground Connections
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK: GO TO 2.

NG: Repair or replace ground connections.
CHECK ENGINE COOLANT TEMPERATURE SENSOR
Refer to , "COMPONENT INSPECTION ".

OK or NG

OK: GO TO 3.

NG: Replace engine coolant temperature sensor.
CHECK THERMOSTAT OPERATION
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

OK: GO TO 4.

NG: Repair or replace thermostat. Refer to THERMOSTAT AND THERMOSTAT HOUSING .
CHECK INTERMITTENT INCIDENT
Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .

Refer to , "WIRING DIAGRAM ".

INSPECTION END