The body electrical system is comprised of four ECU applied CAN*¹ communication nodes.
?Body CAN communication Control Units : BCM(Body Control Module), CLU(Cluster), PDM(Power Distribution Module), SMK(Smart Key), RPAS(Rear Parking Assist System).
*¹ CAN(Controller Area Network) : CAN is serial bus communication type which links not only communication system but also control units each other.
*² LIN(Local Interconnect Network) : LIN is serial communication type which is used in electrical control system. (This is less expensive.)
The steering wheel lock/unlock state of ESCL and the required data when EMS(Engine Management System) controls starting are sent to PDM by the serial communication line.
This code is outputted when power circuit is shorted to battery.
(During no power supply from PDM to ESCL)
Item
Detecting Condition
Possible Cause
DTC Strategy
ESCL power output line check
(by voltage monitoring)
Short to power in ESCL power circuit
Enable Conditions
No power supply from PDM to ESCL
Threshold Value
ESCL power circuit is shorted to power (7V and above)
Diagnostic Time
Immediately
DTC Erasing Time
DTC is erased immediately after trouble fixed. (Under no power supply from PDM to ESCL state)
Fig.1) ESCL Data Signal Waveform