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Home >> Buick >> 2019 >> Envision Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 111 (Shift Lock Control System) >> Diagnostic Information and Procedures >> DTC B270A >> Component Testing

Component Testing

WARNING: This page is about a different car, the 2018 Buick Envision. 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 circuit 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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