Captiva

DTC P0045, P0047, or P0048 - LNP or LNQ

The position of the turbocharger vanes is controlled by the engine control module (ECM). The ECM utilises a turbocharger vane position control solenoid or a boost pressure actuator and a turbocharger pressure sensor to control the turbocharger vanes. The ECM will vary the boost dependant upon the load requirements of the engine. The ECM uses a pulse width modulation on the control circuit to control the solenoid valve.

The ECM detects that the commanded state of the driver and the actual state of the control circuit do not match.

DTCs P0045, P0047, and P0048 are Type B DTCs.

DTCs P0045, P0047, and P0048 are Type B DTCs.

Engine running, increase the engine speed to 1 500 RPM and maintain. With a scan tool, command the Turbocharger Vane Position Control Solenoid Valve OFF. The Turbocharger Vane Position Sensor parameter should increase to 95-97% when the Turbocharger Vane Position Control Solenoid Valve is commanded ON and decrease to near 0% when commanded OFF.

Schematic Reference

Engine Controls Schematics

Connector End View Reference

Component Connector End Views

Electrical Information Reference

Description and Operation

Turbocharger System Description

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

1. Engine running, command the Turbocharger Vane Position Solenoid Valve between 0-95% with a scan tool. You should see the Turbocharger Vane Position rod moving.
2. 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.

1. Ignition OFF, disconnect the harness connector at the Q41 Turbocharger Vane Position Control Solenoid Valve.
2. Ignition ON, verify that a test lamp illuminates between the ignition voltage circuit terminal 2 and ground.

⇒	If the test lamp does not illuminate, test the ignition voltage circuit for a short to ground or an open/high resistance. If the circuit tests normal and the ignition voltage circuit fuse is open, test all components connected to the ignition voltage circuit and replace as necessary.

3. Connect a test lamp between the control circuit terminal 1 and the ignition voltage circuit terminal 2.
4. Clear the DTC information parameter with a scan tool.
5. Engine running, command the Turbocharger Vane Position between 5-95% with a scan tool. The test lamp should illuminate weakly at 5%, and increase up to 95%.

⇒	If the test lamp does not respond to the scan tool commands replace the K20 Engine Control Module.

6. If all circuits test normal, test or replace the Q41 Turbocharger Vane Position Control Solenoid Valve.

Static Test

1. Ignition OFF, disconnect the harness connector at the Q41 Turbocharger Vane Position Control Solenoid Valve.
2. Test for 15-20 Ω between the ignition terminal 2 and the control terminal 1 of the Q41 Turbocharger Vane Position Control Solenoid Valve.

⇒	If not within the specified range, replace the Q41 Turbocharger Vane Position Control Solenoid Valve.

3. Test for infinite resistance between each terminal and the Q41 Turbocharger Vane Position Control Solenoid Valve housing.

⇒	If not the specified value, replace the Q41 Turbocharger Vane Position Control Solenoid Valve.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for ECM replacement, setup, and programming