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MPI - Troubleshooting 13A-79 Inspection Procedure 19 Overheating Probable cause Causes shown on right are suspected. D Engine coolant insufficient or deteriorated D Fan controller malfunction D Engine coolant temperature sensor malfunction D Thermostat malfunction D Water pump malfunction D Condenser fan relay malfunction D Radiator core malfunction D Engine-ECU malfunction NO NG Replace or replenish the engine coolant. OK Replace the radiator core. OK Check the water pump. (Refer to GROUP 14 - Water pump.) NG Replace the water pump. OK Check the thermostat. (Refer to GROUP 14 - Thermostat.) NG Replace the thermostat. OK MUT-II Data list No. 21: Engine coolant temperaure sensor OK: Approximately the same as the ambient temperature when cooled. Between 80 - 120_C when hot. NG Check the Code No. P0115: Engine coolant temperature sensor system. (Refer to P.13A-19.) MUT-II Data list 21 Engine coolant temperature sensor (Refer to P.13A-102.) OK MUT-II Actuator Test No. 37: Condenser fan (HI) D No. 38: Condenser fan (LOW) D Ignition switch: ON OK: Condenser fan rotates (low speed). OK: Condenser fan rotates (high speed). NG Check the Inspection Procedure 25: Condenser fan control relay system. (Refer to P.13A-89.) MUT-II Actuator Test No. 21: Fan controller D Ignition switch: ON OK: Radiator fan rotates. NG Check the Inspection Procedure 24: Radiator fan control relay system. (Refer to P.13A-87.) OK Check the engine coolant. (Refer to GROUP 14 - On-vehicle Service.) <Note> If the engine coolant level is low, check whether the engine coolant has leaked, and repair if required. MUT-II Self-Diag Code Is a diagnosis code output? YES INSPECTION CHART FOR DIAGNOSIS CODE (Refer to P.13A-12.) |