DTC Diagnosis Procedure

WITH CONSULT

1. Start the engine.
2. Perform "FAN DUTY CONTROL" in "ACTIVE TEST" mode with CONSULT.
3. Check that cooling fan speed varies according to the percentage.
   NOTE: Speed changes gradually as the percentage changes.

WITHOUT CONSULT

1. Start the engine.
2. Perform IPDM E/R auto active test and check cooling fan operation, Refer to Diagnosis Description .
3. Check that cooling fan speed increase.
   NOTE: Speed changes gradually when performing the auto active test.

Is the inspection result normal?

YES

GO TO 2.

NO

Refer to Diagnosis Procedure .

Check cooling system for leakage. Refer to ENGINE COOLANT : Inspection .

Is leakage detected?

YES

GO TO 3.

NO

GO TO 4.

Check the following for leakage.

• Hose
• Radiator
• Water pump

Repair or replace malfunctioning part.

Check reservoir tank cap. Refer to RESERVOIR TANK CAP : Inspection .

Is the inspection result normal?

YES

GO TO 5.

NO

Replace reservoir tank cap.

Check multi-way control valve. Refer to Component Inspection .

Is the inspection result normal?

YES

GO TO 6.

NO

Replace multi-way control valve. Refer to MULTI-WAY CONTROL VALVE : Removal & Installation .

Refer to Component Inspection .

Is the inspection result normal?

YES

GO TO 7.

NO

Replace engine coolant temperature sensor 1. Refer to CYLINDER HEAD : Exploded View .

If the cause cannot be isolated, Refer to Symptom Table .

INSPECTION END