Circuit/System Testing
WARNING: This page is about a different variant/trim than selected.
- Ignition Off, remove the Q40 Turbocharger Bypass Solenoid Valve from the turbocharger, ignition On.NOTE: Leave harness connector connected or re-connect it after removing valve.
- Verify the turbocharger bypass valve plunger retracts and extends when commanding the Turbocharger Bypass Solenoid Valve between Active and Inactive with a scan tool.
- The valve plunger does not retract and extend
Replace the Q40 Turbocharger Bypass Solenoid Valve
- The valve plunger retracts and extends
- The valve plunger does not retract and extend
- Verify the conditions listed below do not exist with the turbocharger assembly. Refer to Turbocharger Cleaning and Inspection
- Cracked, damaged or worn turbine blades
- Restricted wastegate, turbine, ports or passages
- Foreign material
- If a condition exists
Repair or replace the turbocharger as necessary
- If none of the conditions exist
- Replace the Q40 Turbocharger Bypass Solenoid Valve