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P2564




DTC P2564 or P2565

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.

* Diagnostic Procedure Instructions 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 turbocharger vane position solenoid to change the position of vanes in order to vary boost depending upon the load requirements of the engine. The turbocharger vane position sensor provides the ECM with a signal voltage relative to position of the turbocharger vanes.

Conditions for Running the DTC

* The engine has been running for more than 10 s.

* DTC 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 0.15 V for greater than 5 s.

P2565

The ECM detects that the turbocharger vane position sensor signal voltage is greater than 4.75 V for greater than 5 s.

Action Taken When the DTC Sets

* DTCs P2564 and P2565 are Type A DTCs.

* The driver information center, if equipped, may display Engine Power is Reduced message.

Conditions for Clearing the DTC

DTCs P2564 and P2565 are Type A DTCs.

Reference Information

Schematic Reference

Engine Controls Schematics [1][2]Electrical Diagrams

Connector End View Reference

Component Connector End Views 1-2 Shift Solenoid (SS) Valve (M30)

Description and Operation

* Turbocharger Learn Testing and Inspection

* Turbocharger System Description Description and Operation

Electrical Information Reference

* Circuit Testing Circuit Testing

* Connector Repairs Connector Repairs

* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections

* Wiring Repairs Wiring Repairs

DTC Type Reference

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

Scan Tool Reference

Control Module References Control Module References for scan tool information

Circuit/System Verification

1. Ignition ON, observe the DTC information with a scan tool. Verify that DTC P06D2 is not set.

• If a DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle for further diagnosis.

2. Engine running, observe the scan tool TC Vane Position Sensor and the Desired Vane Position parameters while slowly increasing the engine speed to 2,500 RPM, then returning the engine speed to idle. The parameters should remain within 2 % throughout the entire engine speed range.

3. Operate the vehicle within the Conditions for Running the DTC to verify that the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the B112 turbocharger vane position sensor.

2. Ignition OFF and all vehicle systems OFF. It may take up to 2 minutes for all vehicle systems to power down. Test for less than 5 ohms between the low reference terminal C 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 K20 engine control module.

3. Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal D and ground.

• If less than the specified range, test the 5 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K20 engine control module.

• If greater than the specified range, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace the K20 engine control module.

4. Verify the scan tool TC Vane Position Sensor parameter is less than 2 %.

• If greater than the specified range, test the signal circuit terminal B for a short to voltage. If the circuit tests normal, replace the K20 engine control module.

5. Install a 3 A fused jumper wire between the signal circuit terminal B and the 5 V reference circuit terminal D. Verify the scan tool TC Vane Position Sensor parameter is greater than 98 %.

• 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 K20 engine control module.

6. If all circuits test normal, test or replace the B112 turbocharger vane position sensor.

Component Testing

Note:
You must perform the Circuit/System Testing in order to verify the integrity of the turbocharger vane position sensor circuits before proceeding with Component Testing.

Turbocharger Vane Position Sensor

1. Remove the B112 turbocharger vane position sensor.

2. Connect the B112 turbocharger vane position sensor harness connector.

Note:
It is normal for the TC Vane Position Sensor voltage to quickly return to approximately 4.9 V as the plunger reaches its fully depressed position.

3. Ignition ON, observe the scan tool TC Vane Position Sensor voltage while slowly depressing the plunger at the end of the B112 turbocharger vane position sensor. The voltage should decrease smoothly from approximately 4.9-0.2 V.

• If the TC Vane Position Sensor parameter drops out or spikes, replace the B112 turbocharger vane position sensor.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.

* Turbocharger Vane Position Sensor Replacement Turbocharger Vane Position Sensor Replacement

* If any service has been performed on the turbocharger or on the turbocharger components, a turbocharger relearn must be performed. Refer to Turbocharger Learn Testing and Inspection

* Control Module References Control Module References for ECM replacement, setup, and programming

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