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: Proceed to "DIAGNOSIS PROCEDURE ".

Check cooling system for leakage. Refer to "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 thermostat. Refer to "INSPECTION ".

Is the inspection result normal? 

YES: GO TO 6.

NO: Replace thermostat. Refer to "REMOVAL AND INSTALLATION ".

Refer to "COMPONENT INSPECTION (ENGINE COOLANT TEMPERATURE SENSOR) ".

Is the inspection result normal? 

YES: GO TO 7.

NO: Replace engine coolant temperature sensor. Refer to "EXPLODED VIEW ".

If the cause cannot be isolated, check the "TROUBLESHOOTING CHART ".

: INSPECTION END