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 ECM message is not received within 500ms.
The HECU does not detect this code until 2 seconds after the IG KEY is turned to ON.
Item
Detecting Condition
Possible cause
DTC Strategy
? CAN message monitoring
? Faulty ECM
? Faulty HECU
Detect Mode
? Outside the ABS control cycle
? Inside the ABS control cycle
? Diagnosis mode
? Failure mode
Enable Conditions
? In case that EMS1 or EMS2 message was not received for more than 500ms within normal voltage condition.
- The Monitoring starts 2000 ms after Power Up.
Fail Safe
? Inhibit the ESP control and allow the ABS/EBD control.
Meanwhile, stop checking the ESP switch failure under the ESP control.