Diagnosis Procedure
- CHECK COOLING FAN OPERATION
With CONSULT-III
- Turn ignition switch ON.
- Perform "COOLING FAN" in "ACTIVE TEST" mode with CONSULT-III.
- Make sure that cooling fan motor operates at each speed (LOW/HI).
Without CONSULT-III
- Perform IPDM E/R auto active test and check cooling fan motor operation. Refer to "DIAGNOSIS DESCRIPTION ".
- Make sure that cooling fan motor operates at each speed (Low/High).
Is the inspection result normal?
YES: GO TO 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 3.
NO: GO TO 4.
- CHECK COOLING SYSTEM FOR LEAK-II
Check the following for leak.
- Hose (Refer to "INSPECTION ".)
- Radiator (Refer to "INSPECTION ".)
- Water pump (Refer to "INSPECTION ".)
Repair or replace malfunctioning part.
- CHECK RADIATOR CAP
Check radiator cap. Refer to "RADIATOR CAP : INSPECTION ".
Is the inspection result normal?
YES: GO TO 5.
NO: Replace radiator cap.
- CHECK THERMOSTAT
Check thermostat. Refer to "INSPECTION ".
Is the inspection result normal?
YES: GO TO 6.
NO: Replace thermostat.
- CHECK WATER CONTROL VALVE
Check water control valve. Refer to "WATER CONTROL VALVE ".
Is the inspection result normal?
YES: GO TO 7.
NO: Replace water control valve
- CHECK ENGINE COOLANT TEMPERATURE SENSOR
Refer to "COMPONENT INSPECTION ".
Is the inspection result normal?
YES: GO TO 8.
NO: Replace engine coolant temperature sensor.
- CHECK MAIN 12 CAUSES
If the cause cannot be isolated, check the following.
ENGINE INSPECTION ITEM CHARTEngine Step Inspection item Equipment Standard Reference information 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
"RADIATOR CAP : 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 motor
- CONSULT-III
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) "DISASSEMBLY AND ASSEMBLY " 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 (56 MPH) for 30 minutes and then let idle for 10 minutes. (4) After 60 minutes of cool down time.
For more information, refer to "TROUBLESHOOTING CHART ".INSPECTION END