This is DTC which is related with communication error between PDM and other units.
※ 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.)
Pattern | Status |
1 | Open in CAN High circuit |
2 | Open in CAN Low circuit |
3 | Short to battery in CAN High circuit |
4 | Short to battery in CAN Low circuit |
5 | Short to ground in CAN High circuit |
6 | Short to ground in CAN Low circuit |
7 | Short between CAN High and Low circuit |
Communication is normal but DTC set if PDM detects 7 error status as follows.
Short to battery in CAN High circuit
Short to ground in CAN High circuit
Short to battery in CAN Low circuit
Short to ground in CAN Low circuit
Short between CAN High and Low circuit
Open or Poor connection in CAN Low circuit
Open or Poor connection in CAN High circuit
Item | Detecting Condition | Possible Cause | ||
DTC Strategy |
•
CAN communication status |
•
Short to battery / ground in CAN high circuit
•
Short to battery / ground in CAN low circuit
•
Short between CAN high and CAN low circuit
•
Open or poor connection in CAN high and low circuit.
•
Faulty IPM | ||
Enable Conditions |
•
IG "ON"
•
Engine "START"
•
B/T voltage engerzied to PDM | |||
Threshold Value | CAN high | 0 V | Short to ground | |
B+ V | Short to battery | |||
CAN low | 0 V | Short to ground | ||
B+ V | Short to battery | |||
Diagnostic Time |
•
Failure has been continued for 2sec. | |||
DTC Erasing Time |
•
DTC is erased immediately after trouble fixed (In case of the past error, perform DTC erasing procedure.) | |||
Fig.1) Signal waveform of CAN Low and HIGH
Fig.2) CAN BUS VOLTAGE LEVEL (LOW SPEED CAN)
