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 communcation lines for the normal ESP control, and sets this code if the data received from EMS is not the same with that from TCM.
Item | Detecting Condition | Possible cause |
DTC Strategy |
•
CAN message monitoring |
•
Faulty PCM(ECM) |
Monitoring Period |
•
- | |
Enable Conditions |
•
In case that the information about transmission is different in the EMS message and TCM message within normal voltage condition. | |
Fail Safe |
•
Inhibit the ESP control and allow the ABS/EBD control. |
