P2564
DTC P2564 or P2565
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview
* Review Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptors
DTC P2564
- Turbocharger Boost Control Position Sensor Circuit Low Voltage
DTC P2565
- Turbocharger Boost Control Position Sensor Circuit High Voltage
Diagnostic Fault Information
Typical Scan Tool Data
Circuit/System Description
The position of the turbocharger vanes is controlled by the engine control module (ECM). The ECM commands the TC vane position solenoid to change the position of vanes in order to vary boost depending upon the load requirements of the engine. The TC vane position sensor provides the ECM with a signal voltage relative to position of the turbocharger vanes.
Conditions for Running the DTC
P2564
* The engine has been running for more than 3 seconds.
* DTCs P2564 and P2565 run continuously when the above conditions are met.
P2565
* The engine has been running for more than 3 seconds.
* DTCs P2564 and P2565 run continuously when the above conditions are met.
Conditions for Setting the DTC
P2564
The ECM detects that the turbocharger vane position sensor voltage is less than 0.28 volt for greater than 1 second.
P2565
The ECM detects that the turbocharger vane position sensor signal voltage is greater than 4.7 volts for greater than 1 second.
Action Taken When the DTC Sets
DTCs P2464 and P2465 are type B DTCs.
Conditions for Clearing the MIL/DTC
DTCs P2464 and P2465 are type B DTCs.
Diagnostic Aids
Verify that any electrical aftermarket devices are properly connected and grounded. Refer to Checking Aftermarket Accessories in Diagnostic Aids. Component Tests and General Diagnostics
Circuit/System Verification
1. If DTCs P0698 or P0699 are set, Refer to Diagnostic Trouble Code (DTC) List - Vehicle for further diagnostics. Diagnostic Trouble Code Descriptions
2. Engine running, observe the scan tool TC Vane Position Sensor and the Desired Vane Position parameters.
3. Engine running, slowly increase the engine speed to 2,500 RPM, then return the engine speed to idle. The TC Vane Position Sensor parameter should remain near or equal to the Desired Vane Position parameter.
4. Engine running, observe the DTC information with a scan tool. DTCs P2564 or P2565 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 Records data.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the TC vane position sensor.
2. Ignition OFF, allow sufficient time for the control module to power down. This can be verified by a loss of communication between the control module and the scan tool.
3. Ignition OFF, test for less than 5 ohms of resistance between the low reference B and ground.
• If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the control module.
4. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal A and ground.
• If less than the specified range, test the 5-volt reference circuit for a an open/high resistance. If the circuit tests normal, replace the control module.
5. Verify the scan tool TC Vane Position Sensor parameter is less than 2 percent.
• If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the control module.
6. Install a 3A fused jumper wire between the signal circuit terminal C and the 5-volt reference circuit terminal A. Verify the scan tool TC Vane Position Sensor parameter is greater than 98 percent.
• If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the control module.
7. If all circuits test normal, test the TC vane position sensor. Refer to Component Testing for instructions.
Component Testing
1. Ignition OFF, disconnect the harness connector at the TC vane position sensor.
2. Remove the TC vane position sensor.
3. Connect the TC vane position sensor harness connector.
4. Ignition ON, observe the scan tool TC Vane Position Sensor parameter for a smooth percentage change without any spikes or drop-outs while slowly depressing the button at the engine of the TC vane position sensor.
If the TC Vane Position parameter does not increment smoothly, replace the TC vane position sensor.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
* Turbocharger Vane Position Sensor Replacement
* Control Module References for ECM replacement, setup, and programming Programming and Relearning Verification Tests