PR25DD engine
- CHECK COOLING FAN RELAY POWER SUPPLY CIRCUIT
- Turn ignition switch OFF.
- Disconnect cooling fan relays-2, -3.
- Turn ignition switch ON.
- Check the voltage between cooling fan relays-2, -3 harness connectors and ground.
+
-
Voltage
Cooling fan relay
Connector
Terminal
E245
(cooling fan relay-2)
2
Ground
Battery voltage
5
E246
(cooling fan relay-3)
2
5
Is the inspection result normal?
YES
GO TO 2.
NO
Perform trouble diagnosis for power supply circuit.
- CHECK COOLING FAN RELAY OUTPUT SIGNAL CIRCUIT
- Turn ignition switch OFF.
- Disconnect IPDM E/R harness connectors.
- Check the continuity between cooling fan relay-2, -3 harness connectors and IPDM E/R harness connector.
+
-
Continuity
Cooling fan relay
IPDM E/R
Connector
Terminal
Connector
Terminal
E245
(cooling fan relay-2)
1
E63
107
Existed
E246
(cooling fan relay-3)
1
106
- Also check harness for short to ground and to power.
Is the inspection result normal?
YES
GO TO 3.
NO
Repair or replace error-detected parts.
- CHECK COOLING FAN MOTOR POWER SUPPLY CIRCUIT
- Disconnect cooling fan motor-1 harness connector.
- Check the voltage between cooling fan motor-1 harness connector and ground.
+
-
Voltage
Cooling fan motor-1
Connector
Terminal
E220
1
Ground
Battery voltage
2
Is the inspection result normal?
YES
GO TO 4.
NO
Perform trouble diagnosis for power supply circuit.
- CHECK COOLING FAN MOTOR CIRCUIT-1
- Disconnect cooling fan motor-2 harness connector.
- Check the continuity between cooling fan relay-2, -3 harness connectors and cooling fan motor-1, -2 harness connectors.
+
-
Continuity
Cooling fan relay
Cooling fan motor
Connector
Terminal
Connector
Terminal
E245
(cooling fan relay-2)
3
E221
(Cooling fan motor-2)
2
Existed
7
E220
(Cooling fan motor-1)
3
E246
(cooling fan relay-3)
3
E221
(Cooling fan motor-2)
1
7
E220
(Cooling fan motor-1)
4
- Also check harness for short to ground and to power.
Is the inspection result normal?
YES
GO TO 5.
NO
Repair or replace error-detected parts.
- CHECK COOLING FAN MOTOR CIRCUIT-2
- Check the continuity between IPDM E/R harness connector and cooling fan motor-1, -2 harness connector.
+
-
Continuity
IPDM E/R
Cooling fan motor
Connector
Terminal
Connector
Terminal
E119
84
E220
(Cooling fan motor-1)
4
Existed
85
E221
(Cooling fan motor-2)
1
- Also check harness for short to ground and to power.
Is the inspection result normal?
YES
GO TO 6.
NO
Repair or replace error-detected parts.
- Check the continuity between IPDM E/R harness connector and cooling fan motor-1, -2 harness connector.
- CHECK COOLING FAN MOTOR CIRCUIT-3
- Check the continuity between cooling fan relay-2, -3 harness connectors and ground.
+
-
Continuity
Cooling fan relay
Connector
Terminal
E245
(cooling fan relay-2)
6
Ground
Existed
E246
(cooling fan relay-3)
6
- Also check harness for short to ground and to power.
Is the inspection result normal?
YES
GO TO 7.
NO
Repair or replace error-detected parts.
- Check the continuity between cooling fan relay-2, -3 harness connectors and ground.
- CHECK COOLING FAN MOTOR CIRCUIT-4
- Check the continuity between cooling fan motor-2 harness connector and ground.
+
-
Continuity
Cooling fan motor-2
Connector
Terminal
E221
3
Ground
Existed
4
- Also check harness for short to ground and to power.
Is the inspection result normal?
YES
GO TO 8.
NO
Repair or replace error-detected parts.
- Check the continuity between cooling fan motor-2 harness connector and ground.
- CHECK COOLING FAN RELAY-2 AND -3
Refer to Component Inspection .
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 .
Is the inspection result normal?
YES
GO TO 10.
NO
Replace malfunctioning cooling fan motor. Refer to Removal and Installation .
- CHECK INTERMITTENT INCIDENT
Refer to Intermittent Incident .
Is the inspection result normal?
YES
Replace IPDM E/R. Refer to Removal and Installation .
NO
Repair or replace error-detected parts.