Code P093, Traction Control System PWM Link Failure: Action

TRACTION DISABLED message displayed in DIC. PCM disables 1st gear and transaxle shift adapts are maintained at current levels.

1. Checks for traction control communication code that was set. Determines if it is a PCM problem or not.
2. Checks for proper output voltage from PCM.
3. Checks circuit No. 594 for open.
4. Checks circuit No. 594 for short to ground.
5. Checks circuit No. 594 for short to voltage.
6. Checks for intermittent traction control problem. If traction control system is okay, check for faulty PCM or EBTCM.

Fig 1: Code P093 Schematic, Traction Control System PWM Link Failure

Courtesy of GENERAL MOTORS CORP.

Fig 2: Code P093 Diagnostic Flow Chart, Traction Control System PWM Link Failure

Courtesy of GENERAL MOTORS CORP.