The position of the turbocharger vanes are controlled by the engine control module (ECM). The ECM utilizes a turbocharger vane control solenoid to control the position of the turbocharger vanes and a turbocharger vane position sensor to verify the position of the vanes. The ECM will vary the position of the vanes depending on engine load requirements. The TC vane position sensor provides the ECM with a signal voltage relative to the TC vane positions on the TC vane position sensor signal circuit.

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

The ECM detects that the difference between turbocharger actual vane position and the desired vane position is 15 percent less than or greater than a calibrated value for greater than 5 seconds.

DTC P2563 is a Type B DTC.

DTC P2563 is a Type B DTC.

Schematic Reference

Engine Controls Schematics

Connector End View Reference

Component Connector End Views

Electrical Information Reference

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

Special Tools

J 34730-405 Injector Test Lamp

1. Verify that DTCs P003A, P0047, P0048, P0698, P0699, P2564, P2565 are not set.

⇒	If any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle.

2. Engine running, observe the TC Vane Position Sensor and the desired TC 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 within 2 percent of each other.
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 within 2 percent of the Desired TC Vane Position parameter throughout the engine speed range.
4. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

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

Important: Perform the Repair Verification after completing the Circuit/System Testing.

1. Ignition OFF, disconnect the harness connector at the TC vane position solenoid.
2. Connect the J 34730-405 between the TC vane position solenoid high control and low control circuits, terminal B and terminal A.

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

3. 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 change from bright to dim, when changing between the commanded states.

⇒	If the test lamp does not change from bright to dim with each command, test the TC vane position solenoid high control circuit terminal A and low control circuit terminal B for a short to ground, open, high resistance, or short to voltage. If the circuits test normal, replace the ECM.

Important: Resistance of the TC control solenoid will vary with the temperature.

4. Ignition OFF, measure the resistance of the TC vane position control solenoid. The reading should be between 3-7 ohms.

⇒	If the resistance is not within the specified range, replace the TC vane position control solenoid.

5. Test for infinite resistance between each TC vane position control solenoid terminal and the TC control solenoid housing.

⇒	If less than infinite resistance, replace the TC control solenoid.

6. Disconnect the harness connectors at the ECM, and TC vane position sensor.
7. Test for less than 5 ohms on all circuits between the following terminals:

•	The ECM X1 solenoid high control circuit terminal 48 to TC vane position control solenoid terminal A.

•	The ECM X1 solenoid low control circuit terminal 96 to TC control solenoid terminal B.

•	The ECM X1 sensor signal circuit terminal 20 to TC vane position sensor terminal B.

•	The ECM X1 sensor low reference terminal 63 to TC vane position sensor terminal C.

•	The ECM X1 sensor 5-volt reference terminal 13 to TC vane position sensor terminal D.

⇒	If the resistance is over 5 ohms, repair the high resistance in the affected circuit.

8. Connect the ECM connectors. Test the TC vane position sensor. Refer to Component Testing in this document for instructions.
9. Install and connect the TC vane position sensor.
10. Command the turbocharger TC vane position sensor from 0 percent to 100 percent while observing the TC Vane Position Sensor Volts parameter. The voltage should increment smoothly and gradually from approximately 1.0 volt to greater than 3.5 volt at 100 percent.

⇒	If the voltage parameter does not change gradually and smoothly, replace the TC control solenoid.

11. Inspect the turbocharger for debris, damage, or sticking vanes. Refer to Turbocharger Cleaning and Inspection.
12. If all circuits, the TC vane position control solenoid, and the TC vane position sensor tests are normal, replace the turbocharger assembly.

Important: Perform the Circuit/System Testing in order to verify the integrity of the TC vane position sensor circuits before proceeding with the Component Testing.

Important: You must perform the Repair Verification after performing the Component Testing.

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.

1. Install any components or connectors that have been removed or replaced during diagnosis.
2. Perform any adjustment, programming, or setup procedures that are required when a component or module is removed or replaced.
3. Clear the DTCs.
4. Turn OFF the ignition for 90 seconds.
5. Duplicate the Conditions for Running the DTC and use the freeze Frame/Failure Records, if applicable, in order to verify the DTC does not reset. If the DTC resets or another DTC is present, refer to the Diagnostic Trouble Code (DTC) List - Vehicle and perform the appropriate diagnostic procedure.
6. 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.
7. To avoid the customer's return to the service department, perform the Diesel Particulate Filter (DPF) Regeneration Enable.