DTC C1605 Can Hardware Error: General Description

The HECU sends 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.