DTC C1648-08: CAN Signal Error EMS For ACC: General Description

The IBAU sends requirement data, such as torque reduction, the number of fuel cut cylinders, and the ESP (ESC) control request, to the PCM (ECM & TCM) through CAN bus line. The PCM (ECM) performs the fuel cut function according to a request signal from the IBAU and then retards an ignition timing. The PCM (TCM) maintains current gear position during the ESP (ESC) control period in order not to increase power which causes a Kick down shift.