For a complete wiring diagram Refer to Section 8WThe EGR Air Flow Control Valve is a three-wire electrically operated throttle valve motor used to assist the EGR system function by creating a vacuum in the intake system to draw exhaust gas into the intake manifold. The Solenoid receives 12 volts from the ECM/ASD relay, ground and a pulse-width modulated ground signal from the ECM. With the solenoid de-energized (off) the throttle valve is in the open (full flow) position. When the ECM energizes (grounds) the throttle motor, the throttle valve closes creating a low pressure (vacuum) effect in the intake system. This low pressure effect helps draw exhaust gases from the EGR Valve into the intake system.When Monitored:With the ignition on and the ECM EGR Air Flow Control Valve command on.Set Condition:The ECM detects excessive current on the EGR Air Flow Control Valve Control circuit for 0.5 second.Possible CausesINTERMITTENT CONDITIONEGR AIR FLOW CONTROL VALVE(K54) EGR AIR FLOW CONTROL VALVE CONTROL SHORTED TO VOLTAGEENGINE CONTROL MODULE1. CHECK FOR ACTIVE DTCIf the ECM detects and stores a DTC, the ECM also stores the engine/vehicle operating conditions under which the DTC was set. Some of these conditions are displayed on the scan tool at the same time the DTC is displayed.Before erasing stored DTCs, record these conditions. Attempting to duplicate these conditions may assist when checking for an active DTC.Turn the ignition on.With the scan tool, erase ECM DTCs.Test drive the vehicle and monitor the scan tool for ECM DTCs.Did this DTC set again?YesGo To 2NoRefer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure.(Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)2. EGR AIR FLOW CONTROL VALVETurn 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 P2141?YesReplace the EGR Air Flow Control Valve.Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)NoGo To 33. (K54) EGR AIR FLOW CONTROL VALVE CONTROL SHORTED TO VOLTAGE

Turn the ignition off.Disconnect the EGR Air Flow Control Valve harness connector.Disconnect the ECM harness connectors.Remove the ASD Relay from the TIPM.Connect a jumper wire between cavity 30 and cavity 87 of the ASD Relay connector.Turn the ignition on.Measure the voltage of the (K54) EGR Air Flow Control Valve Control circuit at the EGR Air Flow Control Valve harness connector.Is the voltage below 0.5 volt?YesReplace and program the Engine Control Module in accordance with the Service Information.Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)NoRepair the (K54) EGR Air Flow Control Valve Control circuit for a short to voltage.Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)