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4. (N112) HIGH SPEED RADIATOR FAN CONTROL CIRCUIT SHORTED TO GROUND Turn the ignition off. Remove the High Speed Radiator Fan Relay from the PDC. Disconnect the ECM harness connectors. Measure the resistance between ground and the (N112) High Speed Radiator Fan Control circuit. Is the resistance above 1000 ohms? Yes >> Go To 5 No >> Repair the (N112) High Speed Radiator Fan Control circuit for a short to ground. Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING). 5. (N112) HIGH SPEED RADIATOR FAN CONTROL CIRCUIT OPEN Measure the resistance of the (N112) High Speed Radiator Fan Control circuit between the PDC and the ECM Is the resistance below 10.0 ohms? Yes >> Replace and program the Engine Control Module in accordance with the Service Information. Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING). No >> Repair the (N112) High Speed Radiator Fan Control circuit for an open. Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING). 9 - 978 ENGINE DIESEL DIAG KJ |