The HECU sends requirement data, such as torque reduction, the number of fuel cut cylinders, and the ESP 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 HECU and then retards an ignition timing. The PCM(TCM) maintains current gear position during the ESP control period in order not to increase power which causes a Kickdown shift.
The HECU checks the CAN communication lines for normal TCS control, and sets this code if CAN BUS OFF status is detected for more than 100ms.
Item | Detecting Condition | Possible cause |
DTC Strategy |
•
Open or short circuit monitoring | 1. Open or short circuit in CAN line 2. Faulty HECU |
Enable Conditions |
•
In case CAN BUS off state continued for more than 100ms. | |
Fail Safe |
•
Inhibit the ESP/DBC control and allow the ABS/EBD control.
•
The ESP/DBC warning lamp is activated. |
