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EC-450 < COMPONENT DIAGNOSIS > [VQ35HR] COOLING FAN 3. CHECK IPDM E/R GROUND CIRCUIT 1. Disconnect IPDM E/R harness connectors E5, E6. 2. Check the continuity between IPDM E/R harness connector and ground. 3. Also check harness for short to power. Is the inspection result normal? YES >> GO TO 4. NO >> Repair open circuit or short to power in harness or connectors. 4. CHECK COOLING FAN CONTROL SIGNAL CIRCUIT 1. Disconnect IPDM E/R harness connector E9. 2. Check the continuity between IPDM E/R harness connector and cooling fan control module harness con- 3. Also check harness for short to ground and short to power. Is the inspection result normal? YES >> GO TO 5. NO >> Repair open circuit or short to ground or short to power in harness or connectors. 5. CHECK COOLING FAN CONTROL MODULE OUTPUT SIGNAL CIRCUIT 1. Reconnect all harness connectors disconnected. 2. Disconnect cooling fan control module harness connectors E301, E302. 3. Turn ignition switch ON. 4. Check the voltage between cooling fan control module harness connector and ground. Is the inspection result normal? YES >> GO TO 6. NO >> Replace cooling fan control module. 6. CHECK COOLING FAN MOTORS -1 AND -2 EC-451, "Component Inspection (Cooling Fan Motor)" Is the inspection result normal? YES >> GO TO 11. NO >> Replace cooling fan motor. 7. CHECK COOLING FAN CONTROL MODULE POWER SUPPLY CIRCUIT-II 1. Turn ignition switch OFF. 2. Disconnect cooling fan relay harness connector. 3. Turn ignition switch ON. 4. Check the voltage between cooling fan relay harness connector and ground. IPDM E/R Ground Continuity Connector Terminal E5 12 Ground Existed E6 41 IPDM E/R Cooling fan control module Continuity Connector Terminal Connector Terminal E9 97 E37 2 Existed Cooling fan control module Ground Voltage Connector Terminal E301 4 Ground Battery voltage E302 6 |