Torque Reduction Control System

Torque Reduction System Flowchart:

DESCRIPTION
In order to minimize shift shock, a torque reduction control system is used. This system temporarily reduces engine torque to improve shift quality by cutting off fuel delivery during upshifts and retarding ignition timing during downshifts. If torque reduction is not possible, the Transmission Control Module (TCM) adjusts line pressure to a pre-programmed amount to reduce shift shock. The TCM sends two reduce torque signals (Reduce Torque Signal 1 for upshifts, Reduce Torque Signal 2 for downshifts) to the Powertrain Control Module (PCM). The PCM sends a Torque Reduced/Engine Coolant Temperature signal to the TCM which notifies the transaxle of torque reduction.