This is DTC which is related with communication error between CLU and other units.
? Body CAN communication Control Units : BCM(Body Control Module), CLU(Cluster), SMK(Smart Key), SJB(Smart Junction Box).
*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.)
Type
Condition
Remark
1
CANH Circuit Open
B1602 is presented when IC detects one of errors among 7 types under normal communication condition.
According to operation condition, some of module which are connected to CAN line may not detect B1602.
Also, B1603 can be detected together.
2
CANL Circuit Open
3
CANH Circuit Short to Power
4
CANL Circuit Short to Power
5
CANH Circuit Short to Ground
6
CANL Circuit Short to Ground
7
CANH and CANL Short to each other
Item
Detecting Condition
Possible Cause
DTC Strategy
CAN Communication Check
BCM, CLU are not Sleep condition
CAN High Line short to battery
CAN Low Line short to battery
CAN High Line short to ground
CAN Low Line short to ground
CAN High and Low line short to each other
CAN High Line short to 5V power
CAN High Line open
CAN Low Line open
Under Sleep condition, CAN High Line is 0V and CAN Low Line is battery voltage
Enable Conditions
BCM, CLU power on
(Under normal communication)
Threshold Value
CAN high : 0V or B+
CAN low : 0V or B+
Diagnostic Time
Immediately
DTC Erasing Time
DTC is erased immediately after trouble fixed
Fig.1) CAN Low/High Signal Waveform
Fig.2) CAN BUS Volatage Level (Low Speed CAN)