This is DTC which is related with communication error between PDM and other units.
(? Control Units : BCM (Body Control Module), PDM(Power Distribution Module), SMK(Smart Key) ECU.
*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.
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
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)