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Home >> Buick >> 2020 >> Envision Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 200 (Shift Lock Control System) >> Diagnostic Information and Procedures >> DTC B270A >> Component Testing

Component Testing

WARNING: This page is about a different car, the 2020 Buick Regal TourX, 2020 Buick Regal, 2019 Buick Regal TourX, and 2019 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition/Vehicle - Off
  2. Disconnect the electrical connector: S3 Transmission Shift Lever
  3. Connect a 3 A fused jumper wire between the test points: Control terminal 4 & 12 V
  4. Momentarily connect a jumper wire between the test points: Ground terminal 2 & Ground

    Verify the component produces a clicking sound: M7 Transmission Shift Lock Control Solenoid Actuator

    • If the component does not produce a sound 

      Replace the component: S3 Transmission Shift Lever

    • Go to next step: If the component produces a sound 
  5. All OK.
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