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Home >> Cadillac >> 2018 >> CT6 Plug-In >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Shift Lock Control System >> Diagnostic Information and Procedures >> DTC B270B >> Component Testing
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Component Testing

  1. Ignition OFF, disconnect the harness connector at the S3 Transmission Shift Lever.
  2. Install a 3 A fused jumper wire between the control terminal 4 and 12 V. Momentarily install a jumper wire between the ground terminal 2 and ground.
  3. Verify the M7 Transmission Shift Lock Control Solenoid Actuator turns on and off/clicks, etc.
    • If the M7 Transmission Shift Lock Control Solenoid Actuator does not turn on and off/clicks, etc 

      Replace the S3 Transmission Shift Lever.

    • Go to next step: If the M7 Transmission Shift Lock Control Solenoid Actuator does turn on and off/clicks, etc 
  4. All OK.
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