DTC Diagnosis Procedure

• If DTC P1217 is displayed with DTC UXXXX first perform the trouble diagnosis for DTC UXXXX.
• If DTC P1217 is displayed with DTC P0607 first perform the trouble diagnosis for DTC P0607.
• If DTC P1217 is displayed with DTC P0527 first perform the trouble diagnosis for DTC P0527.

Is applicable DTC detected?

YES

Perform diagnosis of applicable. Refer to DTC Index .

NO

GO TO 2.

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 3.

NO

Proceed to Diagnosis Procedure .

Check cooling system for leakage.

Is leakage detected?

YES

GO TO 4.

NO

GO TO 5.

Check the following for leakage.

• Hose
• Radiator
• Water pump

Repair or replace malfunctioning part.

Check reservoir tank cap.

Is the inspection result normal?

YES

GO TO 6.

NO

Replace reservoir tank cap.

Check multi-way control valve. Refer to Component Inspection (Multi-way Control Valve) .

Is the inspection result normal?

YES

GO TO 7.

NO

Replace multi-way control valve. Refer to Removal and Installation .

Refer to Component Inspection (Engine Coolant Temperature Sensor 1) .

Is the inspection result normal?

YES

GO TO 8.

NO

Replace engine coolant temperature sensor 1. Refer to Exploded View .

If the cause cannot be isolated.

INSPECTION END