DTC B2747: Traction Control Switch Circuit Shorted To Ground
- Perform diagnostic system check. See DIAGNOSTIC SYSTEM CHECK under DIAGNOSIS & TESTING. After performing diagnostic system check, go to next step.
- 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 for a traction control switch that may be sticking in pressed position. If problem is intermittent, see INTERMITTENTS & POOR CONNECTIONS under DIAGNOSIS & TESTING.
- 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.
- Check traction control switch connector terminal "D" (Brown/White wire) for a short to ground. See Figure. Repair circuit as necessary, then go to step 9. If condition was not found, go to next step.
- Inspect for poor connections at BCM harness connector. Repair as necessary, then go to step 9. If condition was not found, go to step 7
- Inspect for poor connections at traction control switch harness connector. Repair as necessary, then go to step 9. If condition was not found, go to step 8.
- Replace BCM. See appropriate BODY CONTROL MODULE article in ACCESSORIES & EQUIPMENT. Go to step 9.
- Replace traction control switch. See TRACTION CONTROL SWITCH under REMOVAL & INSTALLATION. Go to next step.
- Using scan tool, clear DTCs. Operate vehicle to verify repair. If DTC resets, go to step 2 If DTC does not reset, system is okay.