DTC P0045-P0048 (LCD, LBX, LBS)
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DTC P0045-P0048 (LCD, LBX, LBS)
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DTC P0045 00
Turbocharger Boost Pressure Output Circuit Malfunction
DTC P0046 54
Turbocharger Boost Pressure Output Circuit High Temperature
DTC P0047 00
Turbocharger Boost Control Solenoid Control Circuit Low Voltage
DTC P0048 00
Turbocharger Boost Control Solenoid Control Circuit High Voltage
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Diagnostic Fault Information
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Circuit
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Short to Ground
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Open/High Resistance
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Short to Voltage
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Signal Performance
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Ignition
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P0047 00
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P0045 00
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-
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Control
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P0047 00
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P0045 00
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P0048 00
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P0046 54
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Circuit/System Description
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The position of the turbocharger vanes is controlled by the engine control module (ECM). The ECM utilizes 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.
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Conditions for Running the DTC
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The ignition is ON or the engine is running.
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The ignition voltage is greater than 16.5 V.
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The ECM has commanded the turbocharger boost control solenoid ON and OFF at least once during the ignition cycle.
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The DTCs run continuously when the above conditions are met.
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Conditions for Setting the DTC
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P0045 00, P0046 54, P0047 00 and P0048
The control module detects that the commanded state of the driver and the actual state of the control circuit do not match.
P0045 54
The control module detects that the output driver chip temperature is too high.
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Action Taken When the DTC Sets
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DTCs P0045, P0047, and P0048 are Type B DTCs.
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Conditions for Clearing the DTC
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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
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Circuit/System Verification
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1.
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Engine running, command the Turbocharger Vane Position Solenoid Valve between 0-5% with a scan tool. You should hear an audible click.
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2.
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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.
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1.
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Ignition OFF, disconnect the harness connector at the Q41 Turbocharger Vane Position Control Solenoid Valve.
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2.
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Test for less than 5 Ω between the control circuit terminal 2 and ground.
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3.
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If greater than the specified range, repair the open/high resistance in the ground circuit.
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4.
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Ignition ON, verify that a test lamp illuminates between the ignition voltage circuit terminal 1 and ground.
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5.
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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.
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6.
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Connect a test lamp between the control circuit terminal 2 and the ignition voltage circuit terminal 1.
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7.
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Clear the DTC information parameter with a scan tool.
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8.
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Engine running, command the Turbocharger Vane Position between 5-95% with a scan tool. The test lamp should illuminate brightly at 5%, and decrease up to 95%.
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9.
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If the test lamp does not respond to the scan tool commands replace the K20 Engine Control Module.
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10.
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If all circuits test normal, test or replace the Q41 Turbocharger Vane Position Control Solenoid Valve.
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Static Test
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1.
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Ignition OFF, disconnect the harness connector at the Q41 Turbocharger Vane Position Control Solenoid Valve.
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2.
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Test for 15-20 Ω between the ignition terminal 1 and the control terminal 2 of the Q41 Turbocharger Vane Position Control Solenoid Valve.
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3.
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If not within the specified range, replace the Q41 Turbocharger Vane Position Control Solenoid Valve.
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4.
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Test for infinite resistance between each terminal and the Q41 Turbocharger Vane Position Control Solenoid Valve housing.
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5.
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If not the specified value, replace the Q41 Turbocharger Vane Position Control Solenoid Valve.
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Perform the
Diagnostic Repair Verification
after completing the diagnostic procedure.
