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3. EGR AIR FLOW CONTROL VALVE SHORTED TO GROUND Turn the ignition off. Disconnect the EGR Air Flow Control Valve harness connector. Disconnect the ECM harness connectors. Measure the resistance between ground and the EGR Air Flow Control Is the resistance above 1000 ohms? Yes >> Go To 4 No >> Repair the EGR Air Flow Control Valve circuit for a short to ground. Perform the ECM Verification Test Ver. 1 (Refer to 9 - 4. EGR AIR FLOW CONTROL VALVE CIRCUIT OPEN Turn the ignition off. Disconnect the EGR Air Flow Control Valve harness connector. Disconnect the ECM harness connectors. Measure the resistance of the EGR Air Flow Control Valve Control cir- Is the resistance below 10.0 ohms? Yes >> Go To 5 No >> Repair the EGR Air Flow Control Valve Control circuit for an open. Perform the ECM Verification Test Ver. 1 (Refer to 9 - 9 - 1342 ENGINE DIESEL DIAG KJ |