DTC P003A DTC DESCRIPTOR DTC P003A
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1. 2229 are not set e The battery voltage is more than 11 volts e The ECM is commanding the turbocharger vanes open or closed during a position learn process e The engine speed is between 600 750 RPM e The engine coolant temp ECT is between 160 205 F 71 96 C e DTC POO3A runs continuously when the above conditions are met CONDITIONS FOR SETTING THE DTC The ECM detects that the commanded position of the turbocharger vanes does not match the actual position for more than 30 seconds during the learn process ACTION TAKEN WHEN THE DTC SETS e The control module illuminates the malfunction indicator lamp MIL on the second consecutive ignition cycle that the diagnostic runs and fails The control module records the operating conditions at the time the diagnostic fails The first time the diagnostic fails the control module stores this information in the Failure Records If the diagnostic reports a failure on the second consecutive ignition cycle the control module records the operating conditions at the time of the failure The control module writes the operating conditions to the Freeze Frame and updates the Failure Records CONDITIONS FOR CLEARING THE MiIL DTC The control module turns OFF the malfunction indicator lamp MIL after 3 consecutive ignition cycles that the diagnostic runs and does not fail A current DTC Last Test Failed clears when the diagnostic runs and passes A history DTC clears after 40 consecutive war2. DTC P003A DTC DESCRIPTOR DTC P003A Turbocharger Boost Control Position Not Learned DIAGNOSTIC FAULT INFORMATION Short to Open or High Short to Signal Circuit Ground Resistance Voltage Performance Turbocharger Vane Position Solenoid High Control P0045 POO3A pr F AS id Low e mn Turbocharger Vane Position Solenoid Low P0045 P0045 POO3A POO3A Reference IMPORTANT Always perform the Diagnostic System Check Vehicle prior to using this diagnostic procedure See Testing and Inspection Diagnostic Trouble Code Tests and Associated Procedures CIRCUIT SYSTEM DESCRIPTION The position of the turbocharger vanes is controlled by the engine control module ECM The ECM utilizes a turbocharger vane control solenoid valve and a turbocharger vane position sensor to control the turbocharger vanes The ECM will vary the boost dependant upon the load requirements of the engine The vane control solenoid valve uses 2 circuits a high voltage control circuit and a low reference circuit The ECM uses a pulse width modulation PWM on the high control circuit to control the solenoid valve The ECM provides a ground on the low reference circuit The ECM will detect if the automatic turbocharger learn has failed or the commanded position of the turbocharger vanes does not match the actual position by more than 15 percent Refer to Turbocharger Description and Operation CONDITIONS FOR RUNNING THE DTC e DTC P0117 P0118 P2563 P2564 P2565 P2228 P
3. l solenoid Measure for a voltage of less than 1 volt at the solenoid low reference circuit with a DMM connected to a good ground e If the voltage is greater than 4 8 volts repair the short to voltage e If the circuit tests normal replace the ECM With the ECM and the turbocharger solenoid disconnected measure for a resistance of less than 3 ohms on the high voltage control and the low reference circuits e If the resistance is over 3 ohms repair the high resistance or poor connection in the faulty circuit e If the resistance is less than 3 ohms test the turbocharger solenoid Refer to Component Testing in this diagnostic 3 With the ECM and the turbocharger vane position sensor disconnected measure for a resistance of less than 10 ohms on each of the three vane position sensor circuits e If the resistance is more than 10 ohms repair the high resistance or poor connection on the faulty circuit 4 Remove the solenoid from the turbocharger Connect the ECM and the turbocharger solenoid connectors With the ignition ON and the engine OFF depress the button at the tip of solenoid slightly Command the TC Vane Pos Cirl solenoid valve ON with a scan tool while observing for the spool valve to open at the slot closest to the button e If the spool valve did not operate replace the solenoid 5 With the ignition OFF remove the turbocharger vane position sensor With the ignition ON slowly depress the button on the end of
4. m up cycles if no failures are reported by this or any other emission related diagnostic Clear the MIL and the DTC with a scan tool DIAGNOSTIC AIDS If any service has been performed on the turbocharger or on the turbocharger components a turbocharger relearn must be performed Failure to perform the turbocharger learn procedure may cause this DTC to set Refer to Turbocharger Learn Procedure CIRCUIT SYSTEM VERIFICATION 1 If DTC P0652 P0653 P0698 P0699 P2564 or P2565 are set refer to Diagnostic Trouble Code DTC List Vehicle for further diagnosis See Diagnostic Trouble Code Descriptions Always perform the Turbocharger Learn Procedure then review the DTC information with a scan tool IMPORTANT If you cannot duplicate the condition operate the vehicle within the Conditions for Running the DTC You may also operate the vehicle within the conditions that you observed from the Freeze Frame Failure Records With the engine running increase the engine speed to 1 200 RPM and maintain With a scan tool command the turbocharger vane position control solenoid valve ON The engine pitch and turbocharger whine should change CIRCUIT SYSTEM TESTING IMPORTANT The DMM and test leads must be calibrated to 0 ohms in order to prevent misdiagnosis Use the DMM to perform this test Refer to the DMM User Manual for calibration procedure 1 With the ignition ON and engine OFF disconnect the turbocharger vane position contro
5. the TC sensor Observe the TC vane position sensor parameter for a smooth decreasing percentage from 100 0 percent e If the parameter does not increment smoothly replace the turbocharger vane position sensor 6 Inspect the turbocharger for debris damage or stuck e Ifall circuits the TC solenoid the TC vane position sensor and the turbocharger tests OK replace the ECM COMPONENT TESTING With the turbocharger solenoid disconnected measure for a resistance of less than 7 ohms across the turbocharger solenoid terminals e If the resistance is more than more than 7 ohms replace the solenoid REPAIR INSTRUCTIONS IMPORTANT Always perform the Diagnostic Repair Verification after completing the diagnostic procedure e Turbocharger Vane Position Sensor Replacement e Turbocharger Vane Position Control Solenoid Valve Replacement e Control Module References for ECM replacement setup and programming REPAIR VERIFICATION IMPORTANT Always perform the Turbocharger Learn Procedure Refer to Turbocharger Learn Procedure then review the DTC information with a scan tool 1 With the engine at idle observe the TC vane position sensor and the desired TC vane position in the TC data list Slowly increase the engine speed from idle to 2 500 RPM and slowly decrease the engine speed back to idle 2 The TC vane position parameter should remain near or equal to the desired TC vane position parameter
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