The HECU sends requirement data, such as torque reduction, the number of fuel cut cylinders, and the ESP control request, to the ECM through CAN bus line. The ECM performs the fuel cut function according to a request signal from the HECU and then retards an ignition timing. The ECM 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/HAC control and allow the ABS/EBD control
•
The ESP warning lamp is activated |
