Diagnosis Procedure: Notes

1. INSPECTION START

   Do you have CONSULT-III?

   Yes or No 

   Yes: GO TO 2.

   No: GO TO  2.

2. CHECK COOLING FAN OPERATION

   With CONSULT-III 

   1. Turn ignition switch ON.
   2. Select "COOLING FAN" in "ACTIVE TEST" mode with CONSULT-III.
   3. Check that cooling fans-1 and -2 operates at each speed (LOW/HI).

   OK or NG 

   OK: GO TO  4.

   NG: Check cooling fan control circuit. (Refer to "PROCEDURE A ".)

3. CHECK COOLING FAN OPERATION

   Without CONSULT-III 

   1. Perform IPDM E/R auto active test and check cooling fan motor operation.

      Refer to "AUTO ACTIVE TEST ".

   2. Check that cooling fans-1 and -2 operates at each speed (Low/High).

   OK or NG 

   OK: GO TO 4.

   NG: Check cooling fan control circuit. (Refer to "PROCEDURE A ".)

4. CHECK COOLING SYSTEM FOR LEAK

   Refer to ENGINE COOLANT .

   OK or NG 

   OK: GO TO 5.

   NG: Check the following for leak.

   • Hose
   • Radiator
   • Water pump
5. CHECK RADIATOR CAP

   Refer to RADIATOR .

   OK or NG 

   OK: GO TO 6.

   NG: Replace radiator cap. Refer to "COMPONENT ".

6. CHECK COMPONENT PARTS

   Check the following.

   • Thermostat. (Refer to WATER PUMP .)
   • Engine coolant temperature sensor. (Refer to "COMPONENT INSPECTION ".)

   OK or NG 

   OK: GO TO 7.

   NG: Replace malfunctioning component parts.

7. CHECK MAIN 13 CAUSES

If the cause cannot be isolated, GO TO "MAIN 12 CAUSES OF OVERHEATING ".

INSPECTION END