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6. (Z43) O2 1/1 NEGATIVE CURRENT CONTROL CIRCUIT OPEN OR HIGH RESISTANCE Measure the resistance of the (Z43) O2 1/1 Negative Current Control Is the resistance below 10.0 ohms? Yes >> Go to 7 No >> Repair the (Z43) 02 1/1 Negative Current Control circuit for an open circuit or high resistance. Perform the ECM Verification Test Ver. 1. (Refer to 9 - 7. OXYGEN SENSOR Turn the ignition off. Connect the Engine Control Module (ECM) connector. Replace the Oxygen Sensor in accordance with the Service Information. Start the engine. Allow the engine to reach normal operating temperature. Monitor the scan tool for at least two minutes. With the scan tool, select View DTCs. Is the status Active for this DTC? Yes >> Go to 8 No >> Test Complete. Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) 9 - 1816 ENGINE ELECTRICAL DIAGNOSTICS - DIESEL LX |