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COOLING FAN EC-921 < DTC/CIRCUIT DIAGNOSIS > [VK56DE] C D E F G H I J K L M A EC N P O COOLING FAN Description INFOID:0000000007358838 COMPONENT DESCRIPTION Cooling Fan Motor The cooling fan operates at each speed when the current flows in the cooling fan motor as per the following. Diagnosis Procedure INFOID:0000000007358839 1. CHECK IPDM E/R POWER SUPPLY AND GROUND CIRCUIT OK or NG OK >> GO TO 2. NG >> Follow the instructions on . 2. CHECK COOLING FAN MOTOR POWER SUPPLY CIRCUIT FOR OPEN AND SHORT 1. Turn ignition switch OFF. 2. Disconnect IPDM E/R harness connector E120. 3. Disconnect cooling fan motor (1) harness connector. 4. Check harness continuity between the following terminals; cooling fan motor terminal 1 and IPDM E/R terminal 20, cooling fan motor terminal 2 and IPDM E/R terminal 24. Refer to Wiring Diagram. 5. Also check harness for short to ground and short to power. OK >> GO TO 3. NG >> Repair open circuit or short to ground or short to power in harness or connectors. 3. CHECK COOLING FAN MOTER GROUND CIRCUIT FOR OPEN OR SHORT 1. Check harness continuity between the following terminals; cooling fan motor terminal 3 and ground, cooling fan motor terminal 4 and ground. Refer to Wiring Diagram. 2. Also check harness for short to power. OK >> GO TO 4. NG >> Repair open circuit or short to power in harness or connectors. 4. CHECK COOLING FAN MOTOR EC-922, "Component Inspection" OK or NG OK >> GO TO 5. Cooling fan speed Cooling fan motor terminals (+) ( − ) Low (LOW) 1 3 and 4 2 3 and 4 High (HI) 1 and 2 3 and 4 Continuity should exist. ALBIA0355ZZ Continuity should exist. August 2012 2012 Pathfinder |