General Information

Component Location





General Description

The 6 components related with Body Control Module (hereinafter referred to BCM) connect with each other via CAN (Controller Area Network) communication system. These are BCM. Assist Door Module (ADM), Drive Door Module (DDM), Power Seat Unit (PS), tilt/telescope control unit and Personal Identification Card (PIC).
Wiper Motor Module (WMM) and Multi-Function Switch (M/F) connect with BCM via LIN (Local Interconnect Network). Therefore it is possible to diagnose an overall system with scantool.
* CAN (Cotroller Area Network) : CAN is a serial bus system especially suited for networking "intelligent" devices as well as sensors and actuators within a system or sub-system.
*2 LIN (Local Interconnect Network) : LIN is a new low cost serial communication system intended to be used for distributed electronic systems in vehicles, which complements the existing portfolio of automotive multiplex networks.






DTC Description

Table 1 Bus failures





This code is set if IC in the control module detects the following error although an communication condition is normal ; CANH wire interrupted, CANL wire interrupted, CANH short-circuited to battery, CANH short-circuited to ground, CANH short-circuited to ground, CANL short-circuited to battery, CANL and CANH mutually short-circuited.

DTC Detecting Condition





Diagnostic Circuit





Signal Waveform




Fig 1) CAN low communication waveform
Fig 2) CAN high communication waveform




Fig 3) CAN BUS VOLTAGE LEVEL (LOW SPEED CAN)