Component Location
General Description
This is DTC which is related with communication error between CLU and other units.
? Body CAN communication Control Units : IPM(Inter Panel Module), CLU(Cluster), SMK(Smart Key), HU(Head Unit).
*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.)
DTC Description
This is DTC which is related with communication error between IPM and other units.
(? Control Units : IPM(Inter Panel Module), CLU(Cluster), SMK(Smart Key), HU(Head Unit).
Case1: After short between CAN Low Line and High Line, short to ground together.
Case2: After short between CAN Low Line and High Line, short to power together.
? This code is occurred when It is not possible to transmit data by CAN Line in those way of Software and Hardware. But, It is possible to receive data by CAN Line.
This code reports BUS OFF status when data transmit error count number is over 255. The purpose is to verify the status of CAN controller and CAN communication line when error is detected.
According to operation condition, some of module which are connected to CAN line may not detect B1603.
Also, B1602 coincides with B1603 at all times.
cautionDifference between CAN ERROR and CAN BUS ERROR
CAN Error : MIL On, CAN Bus Error : No MIL
DTC Detecting Condition
Item | Detecting Condition | Possible Cause |
DTC Strategy | CAN Communication Check
| IPM, CLU are not Sleep condition CAN High and Low Line short to ground coincident CAN High and Low Line short to battery coincident |
Enable Conditions | IPM, CLU power on
|
Threshold Value | CAN High/Low : 0V or B+
|
Diagnostic Time | Immediately
|
DTC Erasing Time | DTC is erased immediately after trouble fixed
|
Diagnostic Circuit Diagram
Signal Waveform & Data
Fig.1) CAN Low/High Signal Waveform
Fig.2) CAN BUS Volatage Level (Low Speed CAN)