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• When Monitored: • Set Condition: Possible Causes INTERMITTENT CONDITION EGR AIR FLOW CONTROL VALVE EGR AIR FLOW CONTROL VALVE CONTROL SHORTED TO VOLTAGE ENGINE CONTROL MODULE - INTERNAL SHORT TO VOLTAGE Diagnostic Test 1. CHECK FOR ACTIVE DTC NOTE: If the ECM detects and stores a DTC, the ECM also stores the engine/vehicle operating conditions NOTE: Before erasing stored DTCs, record these conditions. Attempting to duplicate these conditions may With the scan tool, erase ECM DTCs. Test drive the vehicle and monitor the scan tool for ECM DTCs. Did this DTC set again? Yes >> Go To 2 No >> Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) 2. EGR AIR FLOW CONTROL VALVE Turn the ignition off. Disconnect the EGR Air Flow Control Valve harness connector. Turn the ignition on. With the scan tool, erase ECM DTCs. Monitor the scan tool for ECM DTCs. Does the scan tool display an EGR AIR FLOW CONTROL VALVE OPEN CIRCUIT dtc? Yes >> Replace the EGR Air Flow Control Valve. Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING). No >> Go To 3 9 - 1338 ENGINE DIESEL DIAG KJ |