DTC P0033-P0035 (LUJ)
Diagnostic Instructions
DTC Descriptors
| DTC P0033 00: Turbocharger Bypass Solenoid
Valve Control Circuit |
| DTC P0034 00: Turbocharger Bypass Solenoid
Valve Control Circuit Low Voltage |
| DTC P0035 00: Turbocharger Bypass Solenoid
Valve Control Circuit High Voltage |
Diagnostic Fault Information
Circuit
|
Short to Ground
|
Open/High Resistance
|
Short to Voltage
|
Signal Performance
|
Ignition Voltage
|
P0033 00, P0034 00, P0245 00
|
P0033 00
|
-
|
-
|
Control Circuit
|
P0034 00
|
P0033 00
|
P0035 00
|
P0033 00
|
|
| |
Circuit/System Description
The BorgWarner™ dual scroll turbocharger incorporates a
wastegate that is controlled by a pressure differential, that is
determined by the engine control module (ECM) by means of a PWM
solenoid, in order to regulate the pressure ratio of the
compressor. A compressor bypass valve also controlled by the ECM by
utilizing a remotely mounted solenoid is integrated into the bypass
valve to prevent compressor surging and damage from vibrations by
opening during abrupt closed throttle conditions. When the valve is
open during closed throttle deceleration conditions, the bypass
valve allows the air to recirculate in the turbocharger and
maintain compressor speed. Within a calibrated range during the
closed throttle event, or upon a wide open throttle command the
valve will then close to optimize turbo response. The bypass valve
solenoid has the following circuits:
| • |
Turbocharger bypass valve
solenoid control |
As engine load and RPM increases the turbocharger bypass
solenoid parameter should remain commanded ON by the ECM. As soon
as the throttle closes the turbocharger bypass solenoid parameter
should be commanded OFF by the ECM, in order to allow the
turbocharger bypass valve to open and allow the turbocharger air to
recirculate, there by preventing compressor surging.
Conditions for Running the DTC
| • |
The engine speed is greater
than 40 RPM. |
| • |
The ignition voltage is
between 8-16 V |
| • |
The bypass valve must be
activated in order to set the open and short to ground
faults. |
| • |
These DTCs runs continuously
within the enabling conditions. |
Conditions for Setting the DTC
The ECM detects an open, a short to ground, or a short to
voltage on the turbocharger bypass valve solenoid control circuit
for greater than 0.5 s.
Action Taken When the DTC Sets
| • |
DTC P0033 00, P0034 00, P0035
00, are Type C DTCs. |
| • |
The service vehicle soon
indicator will illuminate. |
Conditions for Clearing the DTC
DTC P0033 00, P0034 00, P0035 00, are Type C DTCs.
Reference Information
Schematic Reference
Engine Controls Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
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. |
Use the scan tool output
controls to command the Turbocharger Bypass Solenoid Valve command
parameter to 100% and back to 0%. An audible click should be heard
and felt. |
| 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 are
captured in the freeze frame/failure records data. |
Circuit/System Testing
| 1. |
Clear the DTCs with a scan
tool. |
| 2. |
Ignition OFF, disconnect the
harness connector at the Q40 Turbocharger Bypass Solenoid
Valve. |
| 3. |
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. |
| 4. |
Verify that a test lamp does
not illuminate between the control circuit terminal 1 and
ground. |
| ⇒ |
If the test lamp illuminates, test the control
circuit for a short to voltage. If the circuit tests normal,
replace the K20 Engine Control Module. |
| 5. |
Connect a test lamp between
the control circuit terminal 1 and the ignition circuit terminal
2. |
| 6. |
Command the Q40 Turbocharger
Bypass Solenoid Valve to 100% and back to 0% with a scan tool. The
test lamp should turn ON and OFF when changing between the
commanded states. |
| ⇒ |
If the test lamp is always ON, test the control
circuit for a short to ground. If the circuit tests normal, replace
the K20 Engine Control Module. |
| ⇒ |
If the test lamp is always OFF, test the control
circuit for an open/high resistance. If the circuit tests normal,
replace the K20 Engine Control Module. |
| 7. |
If the circuits test normal,
test or replace the Q40 Turbocharger Bypass Solenoid Valve.
|
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
|
