The HECU send requirement data, such as Torque reduction, the number of fuel cut cylinders, and ESP 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 ESP control time, 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 |
•
Open or short circuit in CAN line
•
Faulty HECU |
Enable Conditions |
•
In case CAN BUS off state continued for more than 100ms. | |
Fail Safe |
•
Inhibit the ESP control and allow the ABS/EBD control.
•
The ESP warning lamp is activated. |
