CAN communication is applied just for FTCSs( Full Traction Control Systems) installed in the vehicle for sending requirement data, such as Torque reduction, the number of fuel cut cylinders, and TCS control requests, to the Engine ECM & TCU. The Engine ECM performs fuel cut functions according to requests from the ABS ECU and retards ignition timing by torque reduction requests. The TCU maintains current gear positions during TCS control time, by not increasing power which causes a Kickdown shift.
The HECU checks the CAN communcation lines for normal TCS control, and sets this code if an TCU message is not received within 500ms. The HECU does not detect this code until 3 seconds after the IG KEY is turned to ON.
Item | Detecting Condition | Possible cause |
DTC Strategy | ● CAN message monitoring | ● Faulty TCU ● Faulty HECU |
Detect Mode | ● Outside the ABS control cycle ● Inside the ABS control cycle ● Diagnosis mode ● Failure mode | |
Enable Conditions | ● In case that TCU message was not received for more than 500ms within normal voltage condition. - The Monitoring starts 2000 ms after Power Up. | |
Fail Safe | ● Inhibit the TCS/ESP control and allow the ABS/EBD control. Meanwhile, stop checking the TCS/ESP switch failure under the TCS/ESP control. ● The TCS/ESP warning lamps are activated. |
