Traction Off Message Always On/Inoperative
- If Anti-Lock Brake System (ABS) diagnostic system check has been performed, go to next step. If ABS diagnostic system check has not been performed, go to appropriate ABS diagnostic system check in appropriate ANTI-LOCK article in BRAKES.
- Turn ignition off. Connect scan tool to Data Link Connector (DLC). See Figure . Using scan tool, select Instrument Panel Module (IPM) data list. Monitor TCS SWITCH status. If TCS SWITCH status is OFF, go to next step. If TCS SWITCH status is not OFF, go to step 4 .
- Activate traction control switch. Monitor TCS SWITCH status. If TCS SWITCH status does not change, go to next step. If TCS SWITCH status changes, check for intermittent connections or circuits.
- Turn ignition off. Disconnect traction control switch connector. See TRACTION CONTROL SWITCH under REMOVAL & INSTALLATION. Turn ignition on. Monitor TCS SWITCH status. If TCS SWITCH status is not OFF, go to next step. If TCS SWITCH status is OFF, go to step 7 .
- Check for short to ground in Light Blue wire between traction control switch and IPM connector C2 terminal A11. See Figure . If circuit is okay, go to next step. If faulty circuit is found and repaired, go to step 10 .
- Check for poor connections at IPM connector. See Figure . If connections are okay, go to step 8 . If faulty connections are found and repaired, go to step 10 .
- Check for poor connections at traction control switch connector. If connections are okay, go to step 9 . If faulty connections are found and repaired, go to step 10 .
- Replace IPM. See INSTRUMENT PANEL MODULE under REMOVAL & INSTALLATION in BODY CONTROL MODULES - DEVILLE article. After repairs, go to step 10 .
- Replace traction control switch. See TRACTION CONTROL SWITCH under REMOVAL & INSTALLATION. After repairs, go to next step.
- After repairs, recheck operation of TRACTION OFF message. If TRACTION OFF message operates properly, repair is complete. If TRACTION OFF message does not operate properly, go to step 2 .