[13A] MULTIPORT FUEL INJECTION (MPI) <4G63> - - TROUBLESHOOTING - SYMPTOM PROCEDURES - Inspection Procedure 20: Overheating | PRINT PAGE / INDEX / PRIOR / NEXT

Inspection Procedure 20: Overheating
COMMENT ON TROUBLE SYMPTOM Failure is possibly caused by failed engine cooling system, failed fan controller, failed engine coolant temperature sensor or other faults.
PROBABLE CAUSE Insufficient or deteriorated engine coolant Failed fan controller Failed engine coolant temperature sensor Failed thermostat Failed water pump Failed radiator core Failed engine-A/T-ECU
| DIAGNOSIS PROCEDURE
| STEP 1. MUT-II/III diagnosis code Q: Diagnosis code set? YES: Inspection chart for diagnosis code (Refer to ). NO: Go to Step 2 .
| STEP 2. Check engine coolant. NOTE: If engine coolant level falls too early, check for leaky spots, and repair if necessary. Check engine coolant (Refer to GROUP 14 - On-vehicle Service ). Q: Is the check result normal? YES: Go to Step 3 . NO: Replace or add engine coolant.
| STEP 3. MUT-II/III actuator test Item 21: Fan controller OK: Fan motor rotating Q: Is the check result normal? YES: Go to Step 4 . NO: Check fan control relay system (Refer to Inspection Procedure 25 ).
| STEP 4. MUT-II/III data list Item 21: Engine coolant temperature sensor OK: Engine cold state: At ambient temperature (atmospheric temperature) or equivalent. Engine hot state: At 80 - 120 °C Q: Is the check result normal? YES: Go to Step 5 . NO: Check engine coolant temperature sensor system (Refer to Code No. P0115 ).
| STEP 5. Check thermostat. Check thermostat (Refer to GROUP 14 - Thermostat ). Q: Is the check result normal? YES: Go to Step 6 . NO: Replace thermostat.
| STEP 6. Check water pump. Check water pump. Q: Is the check result normal? YES: Replace radiator. NO: Replace water pump.

[13A] MULTIPORT FUEL INJECTION (MPI) <4G63> - - TROUBLESHOOTING - SYMPTOM PROCEDURES - Inspection Procedure 20: Overheating | PRINT PAGE / INDEX / PRIOR / NEXT

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