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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 279 (Engine Controls And Fuel - 2.0L (LTG) - DTC P0300 To DTC P2635 And Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P2261: Turbocharger Bypass Valve Stuck >> Component Testing

Component Testing

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.

Static Test

  1. Ignition Off, disconnect the harness connector at the Q40 Turbocharger Bypass Solenoid Valve.
  2. Test for 10-14 Ω between the control terminal 2 and the Ignition terminal 1 of the Q40 Turbocharger Bypass Solenoid Valve.
    • If not between 10-14 Ω 

      Replace the Q40 Turbocharger Bypass Solenoid Valve.

    • If between 10-14 Ω 
  3. All OK

Dynamic Test

  1. Install a 10 A fused jumper wire between the ignition terminal 2 of the Q40 Turbocharger Bypass Solenoid Valve and 12 V. Install a jumper wire between the control terminal 1 and ground.
  2. Verify the Q40 Turbocharger Bypass Solenoid Valve plunger retracts.
    • If the plunger does not retract. 

      Replace the Q40 Turbocharger Bypass Solenoid Valve.

    • If the plunger retracts. 
  3. All OK
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