DTC P2563 DTC DESCRIPTOR DTC P2563 Turbocharger Boost
Contents
1. DTC P2563 DTC DESCRIPTOR DTC P2563 Turbocharger Boost Control Position Sensor Performance DIAGNOSTIC FAULT INFORMATION High Signal Short Ground Resistance open Soro vonage Turbocharger Vane Position Sensor 5 Volt P0107 P0598 P0106 P0699 A Pases pas Turbocharger Vane Position Sensor Signal P2563 P2565 P2563 Circuit Turbocharger Vane Position Sensor Low P2563 P2565 P2563 Reference Circuit 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 TYPICAL SCAN TOOL DATA TC Vane Position Sensor TC Vane Position Sensor Circuit Normal Range Short to Ground urbocharger Vane Position Sensor 5 Volt Reference Turbocharger Vane Position Sensor Signal urbocharger Vane Position Sensor Low Reference Circuit Actual TC Vane Position matches Desired TC Vane Position 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 Movement of the sensor from the closed position to the open position provides the ECM with a signal voltage through the position sensor signal circuit The vane position sensor uses the2. Replacement e Turbocharger Removal e Control Module References for ECM replacement setup and programming REPAIR VERIFICATION 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 return the engine speed back to idle 2 The TC vane position parameter should remain near or equal to the desired TC vane position parameter
3. following 3 circuits e A 5 volt reference circuit e Alowreference circuit e A signal circuit The ECM provides the sensor with 5 volts on the 5 volt reference circuit and a ground on the low reference circuit CONDITIONS FOR RUNNING THE DTC e DTC P0045 P2564 or P2565 are not set e The engine has been running for more than 30 seconds DTC P2563 run continuously when the above conditions are met CONDITIONS FOR RUNNING THE DTC The ECM detects that the difference between turbocharger vane position actual and desired is more than 15 percent for more than 5 seconds 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 e 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 MIL DTC e The control module turns OFF the malfunction indicator lamp MIL after 3 consecutive ignition cycles that the diagnostic runs and does not fail e A current DTC Last Test Failed clears when the diagnostic runs a
4. me Failure Records 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 OFF disconnect the TC vane position sensor and the ECM Measure for a resistance of less than 10 ohms between the TC vane position sensor signal a 5 volt reference and low reference circuits and the ECM e If the resistance is over 10 ohms repair the high resistance or poor connection in the faulty circuit e lf the resistance is less than 10 ohms test the TC sensor 2 With the ignition OFF remove the turbocharger vane position sensor Connect the vane position connector and turn ON the ignition With a scan tool observe the TC Vane Position parameter while slowly depressing the button on the end of sensor Verify a smooth decreasing percent value from 100 0 percent e If the parameter does not decrease smoothly replace the turbocharger vane position sensor 3 Inspect the turbocharger for debris damage or stuck e Ifall circuits the turbocharger and the TC vane position sensor test OK replace the ECM REPAIR INSTRUCTIONS IMPORTANT e Always perform the Diagnostic Repair Verification after completing the diagnostic procedure e Always perform the Turbocharger Learn Procedure then review the DTC information with a scan tool e Turbocharger Vane Position Sensor
5. nd passes e A history DTC clears after 40 consecutive warm up cycles if no failures are reported by this or any other emission related diagnostic e Clear the MIL and the DTC with a scan tool DIAGNOSTIC AIDS e Verify that any electrical aftermarket devices are properly connected and grounded Refer to Checking Aftermarket Accessories See Diagrams Diagnostic Aids e If the condition is intermittent refer to Testing for Intermittent Conditions and Poor Connections and Inducing Intermittent Fault Conditions See Diagrams Diagnostic Aids e f 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 P0698 P0699 P2564 P2565 are set refer to Diagnostic Trouble Code DTC List Vehicle for further information See Diagnostic Trouble Code Descriptions 2 With the engine running command the TC vane position sensor with a scan tool in 5 percent increments from 0 100 percent Observe that the TC Vane Position Sensor parameter and the Desired TC Vane Position parameter remain near the commanded TC vane position 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 Fra
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