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EC-418 < DTC/CIRCUIT DIAGNOSIS > [VQ35DE] COOLING FAN 1. Disconnect cooling fan motor-1 harness connector. 2. Check the voltage between cooling fan motor-1 harness connector and ground. Is the inspection result normal? YES >> GO TO 4. NO >> Perform the trouble diagnosis for power supply circuit. 4. CHECK COOLING FAN MOTOR CIRCUIT-I 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 har- 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. 5. CHECK COOLING FAN MOTOR CIRCUIT-II 1. Check the continuity between IPDM E/R harness connector and cooling fan motor-1, -2 harness connec- 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. 6. CHECK COOLING FAN MOTOR CIRCUIT-III 1. Check the continuity between cooling fan relay-2, -3 harness connectors and ground. Cooling fan motor-1 Ground Voltage Connector Terminal E301 1 Ground Battery voltage 2 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 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 |