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DTC B2747: Traction Control Switch Circuit Low

  1. Perform diagnostic system check. See DIAGNOSTIC SYSTEM CHECK  under DIAGNOSIS & TESTING. After performing diagnostic system check, go to next step.
  2. Install scan tool. Turn ignition on, with engine off. Using scan tool, observe TCS switch state input parameter in BCM input data list. If scan tool displays ACTIVE, go to next step. If scan tool does not display ACTIVE, check switch that may be sticking in pressed position.
  3. Turn ignition off. Disconnect traction control switch. Turn ignition on, with engine off. Using scan tool, observe TCS switch state input parameter. If scan tool displays INACTIVE, go to step  6 . If scan tool does not display INACTIVE, go to next step.
  4. Check traction control switch input/signal circuit for short to ground. Repair as necessary. After repairs, go to step  9 . If circuit is okay, go to next step.
  5. Check for poor connections at BCM harness connector. Repair as necessary, go to step  9 . If connections are okay, go to step  7 .
  6. Check for poor connections at traction control switch connector. Repair as necessary. After repairs, go to step  9 . If connections are okay, go to step  8 .
  7. Replace BCM. After repairs, go to step  9 .
  8. Replace traction control switch. After replacing switch, go to next step.
  9. Using scan tool, clear DTCs. Ensure battery voltage is 9-16 volts and parking brake is not applied. Recheck DTCs. If DTC resets, go to step  2 . If DTC does not reset, system is okay.
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