Diagnostic Test
- CHECK COOLING FAN OPERATION
With CONSULT
- Turn ignition switch ON.
- Perform "FAN DUTY CONTROL" in "ACTIVE TEST" mode with CONSULT.
- Make sure that cooling fan speed varies according to the percentage.
Without CONSULT
- Perform IPDM E/R auto active test and check cooling fan motors operation, refer to DIAGNOSIS DESCRIPTION .
- Make sure that cooling fan operates.
Is the inspection result normal?
YES
GO TO STEP 2 .
NO
Go to DIAGNOSIS PROCEDURE .
- CHECK COOLING SYSTEM FOR LEAK-I
Check cooling system for leak. Refer to INSPECTION .
Is leakage detected?
YES
GO TO STEP 3 .
NO
GO TO STEP 4 .
- CHECK COOLING SYSTEM FOR LEAK-II
Check the following for leak.
- Hose
- Radiator
- Water pump
Repair or replace malfunctioning part.
- CHECK RADIATOR CAP
Check radiator cap. Refer to INSPECTION .
Is the inspection result normal?
YES
GO TO STEP 5 .
NO
Replace radiator cap. Refer to EXPLODED VIEW .
- CHECK THERMOSTAT
Check thermostat. Refer to INSPECTION .
Is the inspection result normal?
YES
GO TO STEP 6 .
NO
Replace thermostat. Refer to EXPLODED VIEW .
- CHECK ENGINE COOLANT TEMPERATURE SENSOR
Refer to COMPONENT INSPECTION .
Is the inspection result normal?
YES
GO TO STEP 7 .
NO
Replace engine coolant temperature sensor. Refer to EXPLODED VIEW .
- CHECK MAIN 12 CAUSES
If the cause cannot be isolated, check the following.
Engine Step Inspection item Equipment Standard Refer to OFF 1 - Blocked radiator
- Blocked condenser
- Blocked radiator grille
- Blocked bumper
- Visual
No blocking - 2 - Coolant mixture
- Coolant tester
ANTI-FREEZE COOLANT MIXTURE RATIO 3 - Coolant level
- Visual
Coolant up to MAX level in reservoir tank and radiator filler neck INSPECTION 4 - Radiator cap
- Pressure tester
INSPECTION ON*2 5 - Coolant leaks
- Visual
No leaks INSPECTION ON*2 6 - Thermostat
- Touch the upper and lower radiator hoses
Both hoses should be hot INSPECTION ON*1 7 - Cooling fan
- CONSULT
Operating COMPONENT FUNCTION CHECK OFF 8 - Combustion gas leak
- Color checker chemical tester 4 Gas analyzer
Negative - ON*3 9 - Coolant temperature gauge
- Visual
Gauge less than 3/4 when driving - - Coolant overflow to reservoir tank
- Visual
No overflow during driving and idling INSPECTION OFF*4 10 - Coolant return from reservoir tank to radiator
- Visual
Should be initial level in reservoir tank INSPECTION OFF 11 - Cylinder head
- Straight gauge feeler gauge
0.1 mm (0.004 in) Maximum distortion (warping) INSPECTION 12 - Cylinder block and pistons
- Visual
No scuffing on cylinder walls or piston INSPECTION *1: Turn the ignition switch ON.
*2: Engine running at 3, 000 rpm for 10 minutes.
*3: Drive at 90 km/h (55 MPH) for 30 minutes and then let idle for 10 minutes.
*4: After 60 minutes of cool down time.
For more information, refer to TROUBLESHOOTINGCHART .
INSPECTION END