P0035
DTC P0033-P0035
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptors
DTC P0033
- Turbocharger Bypass Solenoid Valve Control Circuit
DTC P0034
- Turbocharger Bypass Solenoid Valve Control Circuit Low Voltage
DTC P0035
- Turbocharger Bypass Solenoid Valve Control Circuit High Voltage
Circuit/System Description
The 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 turbocharger. A turbocharger bypass valve also controlled by the ECM by utilizing a remotely mounted solenoid is integrated into the bypass valve to prevent turbocharger 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 turbocharger 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:
* Ignition voltage
* Turbocharger bypass solenoid valve control
As engine load and engine speed 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 turbocharger surging.
Conditions for Running the DTC
* The engine is not cranking.
* The powertrain relay voltage is greater than 11 V.
* The run/crank voltage is greater than 6 V.
* The DTC run continuously when the above conditions are met.
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 1 s.
Action Taken When the DTC Sets
DTC P0033, P0034, P0035, are Type B DTCs.
Conditions for Clearing the DTC
DTC P0033, P0034, P0035, are Type B DTCs.
Reference Information
Schematic Reference
Engine Controls Schematics [1][2]Electrical Diagrams
Connector End View Reference
Component Connector End Views Fuel Pump and Level Sensor Assembly
Description and Operation
* Turbocharger System Description (LUJ) Turbocharger System Description (LUJ)
* Boost Control System Description (LUJ) Boost Solenoid, Turbocharger
Electrical Information Reference
* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References Control Module References for scan tool information
Circuit/System Verification
1. Ignition ON, observe the appropriate control circuit status parameters listed below with a scan tool:
* Turbocharger Bypass Solenoid Valve Control Circuit Low Voltage Test Status
* Turbocharger Bypass Solenoid Valve Control Circuit Open Test Status
* Turbocharger Bypass Solenoid Valve Control Circuit High Voltage Test Status
2. Command the Turbocharger Bypass Solenoid Valve command parameter to 100% and back to 0% with a scan tool. An audible click should be heard and felt.
3. 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. Ignition OFF, disconnect the harness connector at the Q40 Turbocharger Bypass Solenoid Valve.
2. 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 voltage circuit fuse is open, test all components connected to the ignition voltage circuit and replace as necessary.
3. 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.
4. Connect a DMM between the control circuit terminal 1 and the ignition circuit terminal 2.
5. Command the Q40 Turbocharger Bypass Solenoid Valve to 100% and back to 0% with a scan tool. Verify that there is a voltage transition between one test step to the other.
• If there is no voltage transition, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K20 Engine Control Module.
6. If the circuits test normal, test or replace the Q40 Turbocharger Bypass Solenoid Valve.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
Control Module References Control Module References for replacement, programming and setup