Transmission Control Module Interface

Transmission Control Module Interface

The Transmission Control Module (TCM) is linked to the ECM providing input/output link to control engine torque request adaptation. Changes in vehicle operating criteria can result in fluctuating torque demands on the engine.

Signals from the Engine Control Module (ECM) relating to engine speed, throttle position and engine torque (or warm-up cycle) are relayed to TCM to assist in achieving efficient operation.

A signal is transmitted to the ECM from the TCM when torque reduction is required, causing subsequent retardation of ignition timing. This signal also indicates transmission fault condition to the ECM.