DTC P0047 or P0048 (LPL or LPV)
Diagnostic Instructions
DTC Descriptors
| DTC P0047: Turbocharger Boost Control Solenoid
Control Circuit Low Voltage |
| DTC P0048: Turbocharger Boost Control Solenoid
Control Circuit High Voltage |
Diagnostic Fault Information
Circuit
|
Short to Ground
|
Open/High Resistance
|
Short to Voltage
|
Signal Performance
|
Ignition
|
P0047
|
P0047
|
-
|
-
|
Control
|
P0047
|
P0047
|
P0048
|
-
|
|
| |
Circuit/System Description
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.
Conditions for Running the DTC
| • |
The ignition is ON or the
engine is running. |
| • |
The ignition voltage is
greater than 16.5 V. |
| • |
The ECM has commanded the
turbocharger boost control solenoid ON and OFF at least once during
the ignition cycle. |
| • |
The DTCs run continuously once
the above conditions are met. |
Conditions for Setting the DTC
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.
Action Taken When the DTC Sets
DTCs P0047 and P0048 are Type A DTCs.
Conditions for Clearing the DTC
DTCs P0047 and P0048 are Type A DTCs.
Diagnostic Aids
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.
Reference Information
Schematic Reference
Engine Controls Schematics
Connector End View Reference
Component Connector End Views
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
| 1. |
Engine running, command the
Turbocharger Vane Position Solenoid Valve between 0-5% with a scan
tool. You should hear an audible click. |
| 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. |
Circuit/System Testing
| 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
1 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. |
Verify that a test lamp weakly
illuminates between the ignition circuit terminal 1 and the control
circuit terminal 2. |
| ⇒ |
If the test lamp illuminates bright, test the
control circuit for a short to ground. If the circuit tests normal,
replace the K20 Engine Control Module. |
| 4. |
Delete DTCs, command the
Turbocharger Vane Position between 10-95% with a scan tool. The
test lamp should illuminate brightly at 95%, and decrease up to
10%. |
| ⇒ |
If the test lamp does not illuminates to the scan
tool commands, test the control circuit for an open/high
resistance. If all circuit tests normal, replace the K20 Engine
Control Module. |
| 5. |
If all circuits test normal,
test or replace the Q41 Turbocharger Vane Position Control Solenoid
Valve. |
Component Testing
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 1 and the control terminal 2 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. |
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
Control Module References for engine control module
replacement, programming, and setup
|
