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Home >> Chevrolet >> 2013 >> Camaro LS, Automatic Trans >> Repair and Diagnosis >> Brakes >> Antilock Brake System And Traction Control System >> Diagnostic Information and Procedures >> DTC B274A >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF and all vehicle system OFF, disconnect the harness connector at the S148E Multifunction Switch-Center Console. It may take up to 2 minutes for all vehicle systems to power down.
  2. Test for less than 10 Ω between the switch harness connector ground terminal 2 and ground.
    • If 10 Ω or greater 
    1. Ignition OFF, disconnect the harness connector at the K17 Electronic Brake Control Module.
    2. Test for less than 2 Ω in the ground circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, repair the open/high resistance in the ground connection.
    • If less than 10 Ω 
  3. Ignition ON.
  4. Verify the scan tool Sport Mode Switch parameter is Malfunction.
    • If not Malfunction 
    1. Ignition OFF, disconnect the harness connector at the K17 Electronic Brake Control Module.
    2. Test for infinite resistance between the signal circuit terminal 6 and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, replace the K17 Electronic Brake Control Module.
    • If Malfunction 
  5. Ignition OFF, disconnect the harness connector at the K17 Electronic Brake Control Module, ignition ON.
  6. Test for less than 1 V between the signal circuit terminal 6 and ground.
    • If 1 V or greater 
    • If less than 1 V 
  7. Test or replace the S148E Multifunction Switch-Center Console.
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