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P2563





DTC P2563

Diagnostic Instructions

- Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure Component Tests and General Diagnostics.
- Review Strategy Based Diagnosis for an overview of the diagnostic approach Component Tests and General Diagnostics.
- Diagnostic Procedure Instructions provides an overview of each diagnostic category Component Tests and General Diagnostics.

DTC Descriptor

DTC P2563: Turbocharger Boost Control Position Sensor Performance

Diagnostic Fault Information






Typical Scan Tool Data

TC Vane Position Sensor:






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 to control the turbocharger vanes, and a turbocharger vane position sensor to verify the position of the vanes. The ECM will vary the boost dependant upon the load requirements of the engine. Movement of the TC position 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 the following 3 circuits:

- A 5-volt reference circuit
- A low reference circuit
- A signal circuit

The ECM provides the TC vane position sensor with 5 volts on the 5-volt reference circuit and a ground on the low reference circuit.

Conditions for Running the DTC

- DTCs P0045, P2564, or P2565 are not set.
- 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

DTC P2563 is a Type B DTC.

Conditions for Clearing the MIL/DTC

DTC P2563 is a Type B DTC.

Diagnostic Aids

- Verify that any electrical aftermarket devices are properly connected and grounded. Refer to Checking Aftermarket Accessories Component Tests and General Diagnostics.
- A MAP sensor that is skewed or bias may cause this DTC to set.
- A restricted oil supply feed to the turbocharger may cause this DTC to set. Refer to Turbocharger Lack of Oil Supply Symptom Related Diagnostic Procedures.

Reference Information

Schematic Reference

Engine Controls Schematics

Connector End View Reference

- Engine Controls Connector End Views Diagrams
- Engine Controls Component Views Diagrams
- Engine Control Module Connector End Views Diagrams

Electrical Information Reference

- Circuit Testing Component Tests and General Diagnostics
- Connector Repairs Component Tests and General Diagnostics
- Testing for Intermittent Conditions and Poor Connections Component Tests and General Diagnostics
- Wiring Repairs Component Tests and General Diagnostics

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

- Scan Tool Data List Scan Tool Testing and Procedures
- Scan Tool Data Definitions Scan Tool Testing and Procedures
- Scan Tool Output Controls Scan Tool Testing and Procedures

Special Tools

J 34730-405 Injector Test Lamp

Circuit/System Verification

1. If DTCs P003A, P0045, P0698, P0699, P2564, P2565 are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle for further information Diagnostic Trouble Code (DTC) Type Definitions.
2. Engine running, observe the TC Vane Position Sensor and the TC Desired Vane Position Sensor parameters. Command the TC vane position sensor in 5 percent increments, from 0-100 percent. The TC Vane Position Sensor and the Desired TC Vane Position parameters should remain equal to or near the commanded TC Vane Position.
3. Engine running at idle speed, observe the scan tool TC Vane Position Sensor and the Desired TC Vane Position parameters while slowly increasing the engine speed to 2,500 RPM and slowly returning to idle speed.
- The TC Vane Position Sensor parameter should remain near or equal to the Desired TC Vane Position parameter throughout the engine speed range.
4. Engine running, observe the DTC information with a scan tool. DTC P2563 should not set.
5. 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 data.

Circuit/System Testing

Important: Perform the Circuit/System Verification before proceeding with the Circuit/System Testing.

1. Ignition OFF, disconnect the harness connector of the TC vane position solenoid.
2. Ignition ON, verify that a test lamp illuminates between the TC high control circuit terminal A and ground.
- If the test lamp does not illuminate, test the high control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the ECM.
3. Connect the between the high control terminal A and the low control circuits terminal B.

Note: When the engine coolant temperature is less than 70�C (158�F), the test lamp will change brightness when commanded with a scan tool. When the ECM is attempting a TC Learn, the test lamp will flash ON and OFF without commands from a scan tool.

4. Engine running, engine coolant temperature (ECT) sensor 1 must be less than 70�C (158�F). Command the TC Vane Pos. Ctrl. solenoid ON and OFF with a scan tool. The test lamp should illuminate and change from bright to dim when changing between the commanded states.
- If the test lamp does not illuminate, test the low control circuit terminal B for an open/high resistance or a short to voltage. If the circuit tests normal, replace the ECM.
- If the test lamp remains illuminated, test the low control circuit terminal B for a short to ground. If the circuit tests normal, replace the ECM.
5. Ignition OFF, disconnect the harness connectors at the TC vane position sensor, TC vane position solenoid, and the ECM.
6. Ignition OFF, test for less than 5 ohms of resistance on all TC vane position sensor and TC vane position solenoid circuits between the following terminals:
- ECM C1 low control circuit terminal 96 to TC solenoid terminal B
- ECM C1 high control circuit terminal 48 to TC solenoid terminal A
- ECM C1 5-volt reference circuit terminal 13 to TC sensor terminal D
- ECM C1 low reference circuit terminal 63 to TC sensor terminal C
- ECM C1 signal circuit terminal 20 to TC sensor terminal B
- If greater than 5 ohms, repair the affected circuit for an open/high resistance.
7. Connect the ECM, the TC vane position sensor, and the TC vane position solenoid.
8. If all the circuits test normal, test the TC vane position sensor and the TC vane position solenoid. Refer to Component Testing for instructions.
9. Inspect the turbocharger for debris, sticking vanes, or damage. Refer to Turbocharger Cleaning and Inspection Service and Repair.
- If all circuits, the TC vane position sensor, and the TC vane position solenoid test normal, replace the turbocharger.

Component Testing

Important: Perform the Circuit/System Testing before proceeding with any of the Component Tests.

TC Control Solenoid

1. Ignition OFF, disconnect the harness connector at the TC vane position solenoid.
2. Test for a resistance of less than 7 ohms across the TC solenoid terminals.
- If greater than the specified range, replace the TC vane position solenoid.
3. Ignition OFF, remove the TC vane position solenoid from the turbocharger.
4. Connect the TC vane position solenoid harness connector.
5. Ignition ON, command the TC Vane Pos. Cntrl. Solenoid ON. Depress and hold the CAM follower slightly at the tip of the TC solenoid valve while observing the slot closest to the CAM follower for the spool valve to move to the open position.
- If the spool valve did not move to the open position, replace the TC vane position solenoid.

TC Vane Position Sensor

1. Remove the TC vane position sensor.
2. Connect the TC vane position sensor harness connector.
3. Ignition ON, observe the scan tool TC Vane Position Sensor parameter for a smooth percentage change while slowly depressing the button at the end of the TC vane position sensor. The percentage change should increment slowly without any spikes or dropouts.
- If the TC Vane Position parameter drops out or spikes, replace the TC vane position sensor.

Repair Instructions

Perform the Turbocharger Learn , then review the DTC information with a scan tool.

- Turbocharger Control Solenoid Valve Replacement Service and Repair
- Turbocharger Vane Position Sensor Replacement Service and Repair
- Turbocharger Removal Service and Repair
- Control Module References for ECM replacement, setup, and programming Service and Repair

Repair Verification

1. Engine running, observe the TC Vane Position Sensor and the Desired TC Vane Position parameters. Slowly increase the engine speed to 2,500 RPM, and slowly return the engine speed to idle.
2. The TC Vane Position Sensor parameter should remain near or equal to the desired TC Vane Position parameter.
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