VIN L
DTC P003A
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 Descriptor
DTC P003A
- Turbocharger Vane Position Not Learned
Circuit/System Description
The ECM performs the turbocharger learn procedure automatically when the enabling criteria have been met. After each ignition cycle and before the enable criteria have been met, the ECM will use the previously learned value. If the ECM does not have a previously learned value, it will default to a stored calibrated value.
The ECM commands the turbocharger vane control solenoid to position the turbocharger vanes and a turbocharger vane position sensor monitors the actual position of the vanes. During the TC Learn, the ECM commands the vanes to 0 %, then to 100 %, while comparing the actual and desired TC vane position values. If the difference between the values is greater than or less than a calibrated threshold, the automatic learn fails. The TC Learn procedure can detect sticking vanes, sticking control solenoid or position sensor errors.
Conditions for Running the DTC
* The ECM is commanding the turbocharger vanes open or closed during a position learn procedure.
* The engine speed is between 640-850 RPM.
* DTC P003A runs once per key cycle when the above conditions are met.
Conditions for Setting the DTC
* The ECM determines that the difference between the turbocharger desired vane position sensor and the actual turbocharger vane position exceed a calibrated threshold during a valid learn event.
OR
* The time taken to determine the mean offset learned value at fully closed or fully open valve position is greater than 30 s.
Action Taken When the DTC Sets
DTC P003A is a Type B DTC.
Conditions for Clearing the DTC
DTC P003A is a Type B DTC.
Diagnostic Aids
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 other DTCs to set.
The turbocharger learn procedure is required when the following service procedures have been performed:
* Turbocharger vane position control solenoid valve replacement
* Turbocharger vane position sensor replacement
* ECM replacement
* Turbocharger replacement
* Any service that disturbs the turbocharger components
Reference Information
Schematic Reference
Engine Controls Schematics ([1][2]Electrical Diagrams)
Connector End View Reference
Component Connector End Views (Connector End Views By Name)
Description and Operation
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 (Programming and Relearning) for scan tool information
Circuit/System Verification
1. Verify that DTC P0045, P0047, P0048, P006E, P006F, P0651, P168C, P168D, P2263, P2564, P2565, P2598 or P2599 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. Perform the TC Learn procedure with a scan tool. Refer to Turbocharger Learn (Testing and Inspection). DTC P003A should not set.
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. Inspect the turbocharger for debris, damage or sticking vanes. Refer to Turbocharger Cleaning and Inspection (VIN L).
• If a condition is found, clean or replace the turbocharger as necessary.
2. Inspect the Q41 turbocharger vane position control solenoid valve and B112 turbocharger vane position sensor for damage or sticking.
• If a condition is found, test or replace the affected component as necessary.
Component Testing
Turbocharger Vane Position Control Solenoid Valve
1. Ignition OFF, disconnect the harness connector at the Q41 Turbocharger Vane Position Control Solenoid Valve.
2. Measure the resistance across the Q41 Turbocharger Vane Position Control Solenoid Valve terminals. The resistance should be between 3-7 ohm.
• If greater than the specified range, replace the Q41 Turbocharger Vane Position Control Solenoid Valve.
3. Test for infinite resistance between each Q41 Turbocharger Vane Position Control Solenoid Valve terminal and the solenoid valve housing.
• If less than the specified range, replace the Q41 Turbocharger Vane Position Control Solenoid Valve.
4. Ignition OFF, remove the Turbocharger Vane Position Control Solenoid Valve.
5. Connect the Q41 Turbocharger Vane Position Control Solenoid Valve harness connector.
6. 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 Q41 Turbocharger Vane Position Control Solenoid Valve.
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 Replacement (Turbocharger Replacement)
* Turbocharger Control Solenoid Valve Replacement (Turbocharger Control Solenoid Valve Replacement)
* 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).