Procedure A
- CHECK GROUND CONNECTION
- Turn ignition switch OFF.
- Check ground connection E38. Refer to Ground Inspection in "CIRCUIT INSPECTION ".
Is the inspection result normal?
YES: GO TO 2.
NO: Repair or replace ground connection.
- CHECK COOLING FAN MOTORS POWER SUPPLY CIRCUIT-I
- Disconnect cooling fan motor-2 harness connector.
- Check the voltage between cooling fan motor-2 harness connector and ground.TERMINALS VOLTAGE REFERENCE
Cooling fan motor-2 Ground Voltage Connector Terminal E54 1 Ground Battery voltage 2 - Also check harness for short to ground or short to power.
Is the inspection result normal?
YES: GO TO 4.
NO: GO TO 3.
- DETECT MALFUNCTIONING PART
Check the following.
- 40A fusible link (letter M)
- Harness for open or short between cooling fan motor-2 and battery
Repair open circuit or short to ground or short to power in harness or connectors.
- CHECK COOLING FAN MOTORS POWER SUPPLY CIRCUIT-II
- Disconnect cooling fan relay-4.
- Turn ignition switch ON.
- Check the voltage between cooling fan relay-4 harness connector and ground.TERMINALS VOLTAGE REFERENCE
Cooling fan relay-4 Ground Voltage Connector Terminal E57 2 Ground Battery voltage - Also check harness for short to ground or short to power.
Is the inspection result normal?
YES: GO TO 6.
NO: GO TO 5.
- DETECT MALFUNCTIONING PART
Check the following.
- IPDM E/R harness connector E14
- 15A fuse (No. 63)
- Harness for open or short between cooling fan relay-4 and fuse
Repair open circuit or short to ground or short to power in harness or connectors.
- CHECK COOLING FAN MOTORS GROUND CIRCUIT FOR OPEN AND SHORT
- Turn ignition switch OFF.
- Disconnect cooling fan motor-1 harness connector.
- Check the continuity between cooling fan motor-1 harness connector and ground.TERMINALS CONTINUITY REFERENCE
Cooling fan motor-1 Ground Continuity Connector Terminal E53 3 Ground Existed 4 - Also check harness for short to ground or short to power.
Is the inspection result normal?
YES: GO TO 7.
NO: Repair open circuit or short to ground or short to power in harness or connectors.
- CHECK COOLING FAN MOTORS CIRCUIT FOR OPEN AND SHORT
- Disconnect IPDM E/R harness connector E13.
- Check the continuity between cooling fan motor-2 harness connector and cooling fan relay-4 harness connector.TERMINALS CONTINUITY REFERENCE
Cooling fan motor-2 Cooling fan relay-4 Continuity Connector Terminal Connector Terminal E54 3 E57 3 Existed - Check the continuity between cooling fan relay-4 harness connector and cooling fan motor-1 harness connector and ground.TERMINALS CONTINUITY REFERENCE
Cooling fan relay-4 Cooling fan motor-1 Continuity Connector Terminal Connector Terminal E57 5 E53 2 Existed - Check the continuity between cooling fan relay-4 harness connector and IPDM E/R harness connector.TERMINALS CONTINUITY REFERENCE
Cooling fan relay-4 IPDM E/R Continuity Connector Terminal Connector Terminal E57 1 E13 31 Existed - Also check harness for short to ground and short to power.
Is the inspection result normal?
YES: GO TO 8.
NO: Repair open circuit or short to ground or short to power in harness or connectors.
- CHECK COOLING FAN RELAY-4
Refer to "COMPONENT INSPECTION (COOLING FAN RELAY) ".
Is the inspection result normal?
YES: GO TO 9.
NO: Replace cooling fan relay.
- CHECK COOLING FAN MOTORS
Refer to "COMPONENT INSPECTION (COOLING FAN MOTOR) ".
Is the inspection result normal?
YES: GO TO 10.
NO: Replace malfunctioning cooling fan motor.
- CHECK INTERMITTENT INCIDENT
Perform "INTERMITTENT INCIDENT ".
Is the inspection result normal?
YES: Replace IPDM E/R.
NO: Repair or replace harness or connector.