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Home >> Chevrolet >> 2017 >> SS Automatic Trans >> Repair and Diagnosis >> Brakes >> Traction Control >> Antilock Brake System >> Diagnostic Information and Procedures >> DTC B274A: Sport Mode Switch Circuit >> Component Testing

Component Testing

  1. Ignition OFF, disconnect the harness connector at the S73 Suspension Mode Switch (V5B).
  2. Test for infinite resistance between the signal terminal 4 and the ground terminal 6 with the switch in the open position.
    • If less than infinite resistance 

      Replace the S73 Suspension Mode Switch (V5B).

  3. Test for less than 2 Ω between the signal terminal 4 and the ground terminal 6 with the switch in the closed position.
    • If 2 Ω or greater 

      Replace the S73 Suspension Mode Switch (V5B).

    • If less than 2 Ω 
  4. All OK.
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