TCM Diagnostics

All PCS TCM’s constantly monitor transmission performance to detect if a problem has occurred. Depending on the failure, the TCM can command the transmission into a limp mode to potentially prevent further damage while allowing the vehicle to move. The TCM can signal an issue to thedriver by activating an indicator light on the instrument cluster. To further diagnose the problem diagnostic trouble codes can be signaled through a flashing light.

Alternatively, trouble codes can be read using the PCS TCM Diagnostic Tool (Model TDT-2000), most scan tools, or a laptop with PCS software. Both the software and TDT-2000 allow the user to view and data log transmission parameters, such as current gear, TPS %, engine RPM, etc, to help troubleshoot the most difficult intermittent issues.