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3. (D509) LIN BUS CIRCUIT OPEN OR HIGH RESISTANCE Turn the ignition off. Disconnect the Glow Plug Module connector. Disconnect the Generator connector. Disconnect the Engine Control Module (ECM) connector. Measure the resistance of the (D509) LIN Bus circuit between the Glow Measure the resistance of the (D509) LIN Bus circuit between the Gen- Is the resistance below 10 ohms for both measurements? Yes >> Go To 6 No >> Repair the (D509) LIN Bus circuit for an open circuit or high resistance. Perform the ECM Verification Test Ver. 1. (Refer to 9 - 4. (D509) LIN BUS CIRCUIT OPEN OR HIGH RESISTANCE Turn the ignition off. Disconnect the Generator connector. Disconnect the Engine Control Module (ECM) connector. Measure the resistance of the (D509) LIN Bus circuit between the Glow Is the resistance below 10 ohms? Yes >> Go To 5 No >> Repair the (D509) LIN Bus circuit for an open circuit or high resistance. Perform the ECM Verification Test Ver. 1. (Refer to 9 - 9 - 1856 ENGINE ELECTRICAL DIAGNOSTICS - DIESEL LX |