DTC P0045-P0048 - LBY
Diagnostic Instructions
DTC Descriptors
DTC P0045 00: Turbocharger 1 Wastegate
Solenoid Valve Control Circuit Malfunction
DTC P0046 54: Turbocharger 1 Wastegate
Solenoid Valve Control Circuit High Temperature
DTC P0047 00: Turbocharger 1 Wastegate
Solenoid Valve Control Circuit Low Voltage
DTC P0048 00: Turbocharger 1 Wastegate
Solenoid Valve Control Circuit High Voltage
Diagnostic Fault Information
Circuit
|
Short to Ground
|
Open/High Resistance
|
Short to Voltage
|
Signal Performance
|
Ignition
|
P0047 00
|
P0047 00
|
-
|
-
|
Output Control
|
P0047 00
|
P0047 00
|
P0048 00
|
P0045 00, P0046 54
|
Typical Scan Tool Data
Turbocharger A Exhaust Turbine Bypass
Duty Cycle
Circuit
|
Short to Ground
|
Open
|
Short to Voltage
|
Operating Conditions: engine
running
Parameter Normal Range: 0-100%
|
Ignition
|
0-100%
|
0-100%
|
0-100%
|
Output Control
|
0-100%
|
0%
|
0-100%
|
Circuit/System Description
The position of the boost pressure actuator LPT is controlled by
the engine control module (ECM). The ECM utilises a boost pressure
actuator LPT 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 boost pressure actuator
LPT 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
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.
Action Taken When the DTC Sets
DTCs P0045, P0047, and P0048 are Type B DTCs.
Conditions for Clearing the DTC
DTCs P0045, P0047, and P0048 are Type B DTCs.
Diagnostic Aids
Engine running, increase the engine speed to 1 500 RPM
and maintain. With a scan tool, command the Boost Pressure Actuator
LPT OFF. The Boost Pressure Sensor parameter should increase to
100-140 kPa (14.5-20.3 PSI) when the Boost Pressure
Actuator LPT is commanded ON and decrease to near 96 kPa
(13.9 PSI) 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
- Engine running, command the Boost Pressure Actuator
LPT between 0-5% with a scan tool. You should hear an audible
click.
- 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
- Ignition OFF, disconnect the harness connector at the
Q42A Turbocharger 1 Wastegate Solenoid Valve.
- Ignition ON, verify that a test lamp illuminates
between the ignition circuit terminal 2 and ground.
⇒ |
If the test lamp does not illuminate, test the
ignition circuit for a short to ground or an open/high resistance.
If the circuit tests normal and the ignition circuit fuse is open,
test all components connected to the ignition voltage circuit and
replace as necessary. |
- Verify that a test lamp does not illuminate between
the ignition circuit terminal 2 and the control circuit terminal
1.
⇒ |
If the test lamp illuminates, test the control
circuit for a short to ground. If the circuit tests normal, replace
the K20 Engine Control Module. |
- Command the Q42A Turbocharger 1 Wastegate
Solenoid Valve ON with a scan tool. Verify that a test lamp does
illuminate between the ignition circuit terminal 2 and the control
circuit terminal 1.
⇒ |
If the test lamp does not illuminates, test the
control circuit for a short circuit to voltage or an open
circuit/high resistance. If the circuit tests normal, replace the
K20 Engine Control Module. |
- If all circuits test normal, test or replace the
Q42A Turbocharger 1 Wastegate Solenoid Valve.
Component Testing
Static Test
- Ignition OFF, disconnect the harness connector at the
Q42A Turbocharger 1 Wastegate Solenoid Valve.
- Test for 5-20 Ω between the control terminal 1
and the ignition terminal 2 of the Q42A Turbocharger 1
Wastegate Solenoid Valve.
⇒ |
If not within the specified range, replace the
Q42A Turbocharger 1 Wastegate Solenoid Valve. |
- Test for infinite resistance between each terminal and
the Q42A Turbocharger 1 Wastegate Solenoid Valve
housing/case.
⇒ |
If not the specified value, replace the
Q42A Turbocharger 1 Wastegate Solenoid Valve. |
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
|