Diagnosis Procedure

1. Turn ignition switch OFF.
2. Disconnect cooling fan relays-2, -3.
3. Turn ignition switch ON.
4. Check the voltage between cooling fan relays-2, -3 harness connectors and ground.
   TERMINAL VOLTAGE REFERENCE CHART
   
   

   Cooling fan relay		Ground	Voltage
   Connector	Terminal
   E57 (cooling fan relay-2)	2	Ground	Battery voltage
   	5
   E59 (cooling fan relay-3)	2
   	5

   Is the inspection result normal? 

   YES: GO TO 2.

   NO: Perform the trouble diagnosis for power supply circuit.

1. Turn ignition switch OFF.
2. Disconnect IPDM E/R harness connectors.
3. Check the continuity between cooling fan relay-2, -3 harness connectors and IPDM E/R harness connector.
   TERMINAL CONTINUITY REFERENCE CHART
   
   

   Cooling fan relay		IPDM E/R		Continuity
   Connector	Terminal	Connector	Terminal
   E57 (cooling fan relay-2)	1	E11	42	Existed
   E59 (cooling fan relay-3)	1	E10	34

4. Also check harness for short to ground and short to power.

   Is the inspection result normal? 

   YES: GO TO 3.

   NO: Repair open circuit, short to ground or short to power in harness or connectors.

1. Disconnect cooling fan motor-1 harness connector.
2. Check the voltage between cooling fan motor-1 harness connector and ground.
   TERMINAL VOLTAGE REFERENCE CHART
   
   

   Cooling fan motor-1		Ground	Voltage
   Connector	Terminal
   E301	1	Ground	Battery voltage
   	2

   Is the inspection result normal? 

   YES: GO TO 4.

   NO: Perform the trouble diagnosis for power supply circuit.

1. Disconnect cooling fan motor-2 harness connector.
2. Check the continuity between cooling fan relay-2, -3 harness connectors and cooling fan motor-1, -2 harness connectors.
   TERMINAL CONTINUITY REFERENCE CHART
   
   

   Cooling fan relay		Cooling fan motor		Continuity
   Connector	Terminal	Connector	Terminal
   E57 (cooling fan relay-2)	3	E302 (Cooling fan motor-2)	2	Existed
   	7	E301 (Cooling fan motor-1)	3
   E59 (cooling fan relay-3)	3	E302 (Cooling fan motor-2)	1
   	7	E301 (Cooling fan motor-1)	4

3. Also check harness for short to ground and short to power.

   Is the inspection result normal? 

   YES: GO TO 5.

   NO: Perform the trouble diagnosis for power supply circuit.

1. Check the continuity between IPDM E/R harness connector and cooling fan motor-1, -2 harness connector.
   TERMINAL CONTINUITY REFERENCE CHART
   
   

   IPDM E/R		Cooling fan motor		Continuity
   Connector	Terminal	Connector	Terminal
   E10	35	E301 (Cooling fan motor-1)	4	Existed
   	38	E302 (Cooling fan motor-2)	1

2. Also check harness for short to ground and short to power.

   Is the inspection result normal? 

   YES: GO TO 6.

   NO: Perform the trouble diagnosis for power supply circuit.

1. Check the continuity between cooling fan relay-2, -3 harness connectors and ground.
   TERMINAL CONTINUITY REFERENCE CHART
   
   

   Cooling fan motor		Ground	Continuity
   Connector	Terminal
   E57 (cooling fan relay-2)	6	Ground	Existed
   E59 (cooling fan relay-3)	6

2. Also check harness for short to ground and short to power.

   Is the inspection result normal? 

   YES: GO TO 7.

   NO: Repair open circuit, short to ground or short to power in harness or connectors.

1. Check the continuity between cooling fan motor-2 harness connector and ground.
   TERMINAL CONTINUITY REFERENCE CHART
   
   

   Cooling fan motor-2		Ground	Continuity
   Connector	Terminal
   E302	3	Ground	Existed
   	4

2. Also check harness for short to ground and short to power.

   Is the inspection result normal? 

   YES: GO TO 8.

   NO: Repair open circuit, short to ground or short to power in harness or connectors.

Check cooling fan relays-2 and -3. Refer to "COMPONENT INSPECTION (COOLING FAN RELAY) ".

Is the inspection result normal? 

YES: GO TO 9.

NO: Replace malfunctioning cooling fan relay.

Check cooling fan motors-1 and -2. Refer to "COMPONENT INSPECTION (COOLING FAN MOTOR) ".

Is the inspection result normal? 

YES: GO TO 10.

NO: Replace malfunctioning cooling fan motor. Refer to "EXPLODED VIEW ".

Check intermittent incident. Refer to "INTERMITTENT INCIDENT ".

Is the inspection result normal? 

YES: Replace IPDM E/R. Refer to "EXPLODED VIEW ".

NO: Repair or replace error-detected parts.