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 RAM for normal TCS control, and sets this code if a CAN RAM malfunction is detected.
Item | Detecting Condition | Possible cause |
DTC Strategy |
•
CAN RAM monitoring | 1. Faulty HECU |
Enable Conditions |
•
Faults are detected immediately if the initialization software can't have write access to the configuration registers of the CAN-controller module | |
Fail Safe |
•
Inhibit the ESP/HAC control and allow the ABS/EBD control
•
The ESP warning lamp is activated |
