Diagnosis Procedure
- CHECK DTC PRIORITY
If DTC P0125 is displayed with DTC P0117 or P0118, first perform the confirmation procedure for DTC P0117 or P0118.
Is applicable DTC detected?
YES: Perform diagnosis of applicable.
- DTC P0117: Refer to "DTC DESCRIPTION ".
- DTC P0118: Refer to "DTC DESCRIPTION ".
NO: GO TO 2.
- CHECK GROUND CONNECTION
- Turn ignition switch OFF.
- Check ground connection M111. Refer to Ground Inspection in
"CIRCUIT INSPECTION
".
Is the inspection result normal?
YES: GO TO 3.
NO: Repair or replace ground connection.
- CHECK ENGINE COOLANT TEMPERATURE SENSOR
Refer to "COMPONENT INSPECTION ".
Is the inspection result normal?
YES: GO TO 4.
NO: Replace engine coolant temperature sensor. Refer to "EXPLODED VIEW ".
- 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.
Is the inspection result normal?
YES: GO TO 5.
NO: Repair or replace thermostat. Refer to "REMOVAL AND INSTALLATION ".
- CHECK INTERMITTENT INCIDENT
Refer to "INTERMITTENT INCIDENT ".
: INSPECTION END