Body electrical system is consist of 3 Units BCM(Body Control Module), CLU(Cluster), SMK(Smart Key Control Module) constructing the Body Wiring system is connected to BODY CAN*¹.
*¹ CAN (Controller Area Network): CAN is serial bus communication type which links not only communication system but also control units each other.
DTC is set if SMK unit detects that CAN HIGH or CAN LOW is short to battery, short to ground, open and short between CAN High and CAN Low each other.
Check wirings if the DTC is set.
Item
Detecting Condition
Possible Cause
DTC Strategy
CAN Signal Check
Driver door opens, No sleeping mode in Smartkey Unit
Open or short circuit in CAN High line
Open or short circuit in CAN Low line
Short circuit in CAN High and Low circuit
NoteSignal level in sleeping mode
- CAN High line : low
- CAN Low line : high
Enable Conditions
Battery voltage applied to Smartkey Unit
1. Short to battery in CAN High/Low circuit
2. Short to ground in CAN High/Low circuit
3. Short circuit between CAN High and CAN Low each other
4. Short to B+(5V) in CAN High circuit
5. Open in CAN High/Low circuit
Threshold value
CAN High/Low: Voltage is "0" means short to ground,
Voltage is "B+" means short to battery
Diagnostic Time
Above 2 seconds
DTC Erasing Time
Immediately