2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 998
瀚慖f 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. Connect a test lamp between the control circuit terminal 2 and the ignition circuit terminal 1.
Note: If any Turbocharger circuit DTC is set, the Bypass Solenoid Valve output control may not function. It may be necessary to clear the
DTCs with a scan tool to enable the output control.
4. Command the Turbocharger Bypass Solenoid Valve between Inactive and Active with a scan tool, then select exit. The test lamp should
illuminate and then go OFF.
瀚慖f the test lamp is always ON, test the control circuit terminal 2 for a short to ground. If the circuit tests normal, replace the K20 ECM.
瀚慖f the test lamp is always OFF, test the control circuit terminal 2 for a short to voltage or an open/high resistance. If the circuit tests
normal, replace the K20 ECM.
5. Test for 2.6-4.6 V between the control circuit terminal 2 and ground.
瀚慖f the voltage is not within the specified range, replace the K20 ECM.
6. If all circuits test normal, test or replace the Q40 turbocharger bypass solenoid valve.
Component Testing
1. Ignition OFF, disconnect the harness connector at the Q40 turbocharger bypass solenoid valve.
2. Test for 12-60 ohm between the control terminal 2 and the ignition terminal 1 of the Q40 turbocharger bypass solenoid valve.
瀚慖f not within the specified range, replace the Q40 turbocharger bypass solenoid valve.
3. Test for infinite resistance between each terminal and the Q40 turbocharger bypass solenoid valve housing.
瀚慖f not the specified value, replace the Q40 turbocharger bypass solenoid valve.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Turbocharger Disassemble (See: Engine, Cooling and Exhaust/Engine/Service and Repair/Overhaul/101. Turbocharger Disassemble)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for engine control module replacement, setup, and
programming
P0034
DTC P0033-P0035
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/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
Diagnostic Fault Information
