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.
No CAN communication status.
Case1: CAN High and Low, short to battery together.
Case2: CAN High and Low, short to ground together.
This code reports BUS OFF status and it is necessary to verify the status of CAN communication line.
Difference between CAN error(B1602) and CAN BUS error(B1603)
CAN Error : MIL On, CAN Bus Error : No MIL when Hazard On
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
CAN Signal Check | 1. Driver door opens, No sleeping mode in Smartkey Unit (1) Open or short circuit in CAN High line (2) Open or short circuit in CAN Low line (3) Short circuit in CAN High and Low circuit 2. Faulty Smartkey Unit |
Enable Conditions |
•
Battery voltage applied to Smartkey Unit 1. Short to ground between CAN High and CAN Low lines each other 2. Short to battery between CAN High and CAN Low lines each other | |
Threshold value |
•
Short to ground : CAN High/Low line voltage is approx. 0
•
Short to battery : CAN High/Low line voltage is approx. B+ | |
Diagnostic Time |
•
Immediately | |
DTC Erasing Time |
•
Immediately |
