Theory Of Operation

WARNING: This page is about a different variant/trim than selected.

The Vehicle Speed Sensor (VSS) signal is transmitted to the Anti-Lock Brake System (ABS) Module via dedicated hard wire. The VSS signal is then transmitted over the Controller Area Network (CAN) bus to the Transmission Control Module (TCM).

The Output Speed Sensor signal is a direct input to the TCM.

The TCM monitors these signals to determine if the VSS signal CAN message is valid. If the VSS signal and the Output Speed Sensor signal do not match, this Diagnostic Trouble Code (DTC) is set.

Incorrect tire size may influence this DTC. If the incorrect tire size is programmed into the BCM, this can contribute to this DTC.

NOTE:

A non-production size tire cannot be programmed into the BCM. The production Powertrain, with the production size tires, is the only emissions certified configuration that is available for reprogramming.