Component Tests and General Diagnostics

COOLING FAN





Diagnosis Procedure
1.CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R harness connector E120.





3. Check voltage between IPDM E/R terminal 22 and ground with
CONSULT-III or tester.





OK or NG
OK - GO TO 3.
NG - GO TO 2.
2.DETECT MALFUNCTIONING PART
Check the following.
- 40A fusible link
- Harness for open or short between IPDM E/R and battery
- Repair open circuit or short to ground or short to power in harness or connectors.
3.CHECK COOLING FAN MOTOR CIRCUIT FOR OPEN OR SHORT





1. Disconnect cooling fan motor harness connector (1).
2. Check harness continuity between cooling fan motor terminal 1 and IPDM E/R terminal 24, cooling fan motor terminal 2 and body ground. Refer to wiring diagram.






3. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 4.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK COOLING FAN MOTOR
SEE Component Inspection.
OK or NG
OK - GO TO 5.
NG - Replace cooling fan motor.
5.CHECK INTERMITTENT INCIDENT
How to Check Terminal and Intermittent Incident.
OK or NG
OK - INSPECTION END
NG - Repair or replace harness connectors.




Component Inspection

COOLING FAN MOTOR
1. Disconnect cooling fan motor harness connector.





2. Supply cooling fan motor terminals with battery voltage and check operation.
Cooling fan motor should operate.
If NG, replace cooling fan motor.