DTC C1612 Can Time-Out TCM: General Description

The HECU send requirement data, such as Torque reduction, the number of fuel cut cylinders, and ESC control requests, to the Engine PCM (ECM & TCM) through CAN bus line.

The Engine PCM (ECM) performs fuel cut functions according to requests from the HECU and retards ignition timing by torque reduction requests.

The PCM (TCM) maintains current gear positions during ESC control time, in order not to increase power which causes a Kickdown shift.