DTC P003A or P100B

Engine Controls and Fuel - 3.0L LM2 Diesel | Diagnostic Information and Procedures | Document ID: 5500952 Diagnostic Instructions Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions DTC Descriptor DTC P003A Turbocharger/Supercharger Boost Control Position Exceeded Learning Limit DTC P100B Turbocharger/Supercharger Boost Control Initial Position Learn Value Exceeded Learning Limit Circuit/System Description

Circuit	Description
5 V Reference	Regulated voltage supplied by the control module.
Serial Data	Digitally encoded information for communication between devices.
Low Reference	Grounded through the control module.

Component	Description
K20 Engine Control Module	The control module controls a series of actuators to ensure optimal engine performance. The control module does this by reading values from a variety of sensors, interprets the data and adjusts the engine actuators accordingly.
M103 Turbocharger Vane Position Actuator	The assembly has several functions: The component is actuated by a bidirectional DC motor. The component M103 contains a contactless inductive position sensor. A fixed transmitter coil excites a movable rotor, which in turn induces a current in a fixed receiver coil. The current varies with the angle of the rotor. Electronics inside the sensor convert the current into digital data which is transmitted via a serial data circuit to the control module K20.

The engine control module performs the learn function for the turbocharger vane position automatically in certain intervals. Conditions for Running the DTC P003A DTC  P0045, P0046, P0048, P0071, P0072, P0073, P0074, P0116, P0117, P0118, P0119, P0128, P111E, P169E, P169F, P16FA, P16FC, P2564, P2565, P2599, U0656 = Not set Ambient Air Temperature Sensor = Greater than −40°C (−40°F) Ignition and Start Signal = Greater than 9.5 V Engine Coolant Temperature = 30 to 150°C (86 to 302°F) Engine = Not Running Frequency the DTC runs = Once @ Ignition Off — After the running conditions are met P100B DTC P003A, P0045, P0046, P0048, P169E, P169F, P16FA, P16FC, P2564, P2565, P2599, U0656 = Not set Turbocharger/Supercharger Boost Control Initial Position Learn Status = Complete Frequency the DTC runs = Once — After the running conditions are met Conditions for Setting the DTC P003A Turbocharger/Supercharger Boost Control Position Sensor ≠ 3.6 to 4.5 V — Self Test & Valve — Fully Closed or Turbocharger/Supercharger Boost Control Position Sensor ≠ 0.7 to 1.6 V — Self Test & Valve — Fully Opened P100B The difference between the desired and the actual turbocharger vane position exceeds a calibrated threshold during a vane position learn event. Actions Taken When the DTC Sets DTCs listed in the DTC Descriptor category = Type A Reduced Engine Power = Enabled Warning Message = Reduced Engine Power Conditions for Clearing the DTC DTCs listed in the DTC Descriptor category = Type A Reference Information Schematic Reference Engine Controls Schematics Connector End View Reference Master Electrical Component List Electrical Information Reference Circuit Testing Connector Repairs Testing for Intermittent Conditions and Poor Connections Wiring Repairs DTC Type Reference Powertrain Diagnostic Trouble Code (DTC) Type Definitions Scan Tool Reference Control Module References Circuit/System Verification

1. Ignition » On / Vehicle » In Service Mode
2. Verify DTC P0045, P0046, P0641, P169E, P169F, P16FA, P16FC, P2564, P2565, P2598, P2599, U0656 is not set. ⇒ If any of the DTCs are set Refer to: Diagnostic Trouble Code (DTC) List - Vehicle ⇓ If none of the DTCs are set
3. Perform the scan tool control function: Turbocharger/Supercharger Boost Control Initial Position Learn ⇒ If the DTC sets Refer to: Circuit/System Testing ⇓ If the DTC does not set
4. Perform the scan tool control function: Turbocharger/Supercharger Boost Control Position » Increase & Decrease Verify the control rod of the actuator moves smoothly over the full range. ⇒ If the control rod does not move smoothly over the full range Refer to: Circuit/System Testing ⇓ If the control rod moves smoothly over the full range
5. Engine » Idling — For greater than 1 min
6. Ignition/Vehicle » Off — For greater than 2 min
7. Ignition » On / Vehicle » In Service Mode
8. Verify DTC P003A, P100B is not set. ⇒ If the DTC sets Refer to: Circuit/System Testing ⇓ If the DTC does not set
9. 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. Verify DTC P003A, P100B is not set. ⇒ If the DTC sets Refer to: Circuit/System Testing ⇓ If the DTC does not set
10. All OK. Circuit/System Testing
11. Ignition/Vehicle » Off
12. Verify a condition does not exist with the component: Linkage @ M103 Turbocharger Vane Position Actuator — Binding or Sticking / Debris / Dirt / Interference with other components or objects / Loose / Modified / Visible Damage / Worn Variable Geometry Turbocharger Actuator Lever @ Turbocharger — Binding or Sticking / Debris / Dirt / Loose / Modified / Visible Damage / Worn ⇒ If a condition exists Repair or replace as necessary ⇓ If no condition exists
13. Test or replace the component: Variable Geometry Turbocharger Actuator Replacement — M103 Turbocharger Vane Position Actuator Repair Instructions Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair Verification Compressor Air Intake Turbocharger Replacement — M103 Turbocharger Vane Position Actuator Variable Geometry Turbocharger Actuator Replacement — M103 Turbocharger Vane Position Actuator For control module replacement, programming, and setup refer to: Control Module References Additional Procedures Turbocharger/Supercharger Boost Control Initial Position Learn — Perform only when the following component/system is replaced or serviced: M103 Turbocharger Vane Position Actuator — Replaced Turbocharger — Cleaned /Replaced