The CAN bus line consists of two lines, CAN_L and CAN_H (CAN Low and CAN High, respectively), as well as two terminal resistors (A twisted-pair cable, highly resistant to noise, is used for the communications line).
The CAN bus line connecting the two terminal resistors is the main bus line, and the CAN bus line connecting each ECU is the sub-bus line.
The terminal resistors are installed in the engine-ECU <M/T> or the engine-A-M/T-ECU <Automated manual transmission> module and connection meter to stabilize communication signals (The terminal resistance is set at approximately 120 Ω).
A maximum of 10 ECUs are connected in the CAN bus line as follows.
Engine-ECU <M/T>
Engine-A-M/T-ECU* <Automated manual transmission>
ABS-ECU <Vehicles without active stability control system>
ABS/Active stability control system-ECU <Vehicles with active stability control system>
Steering wheel sensor <Vehicles with active stability control system>
G and yaw rate sensor <Vehicles with active stability control system>
Electric power steering-ECU
SRS-ECU
A/C-ECU
ETACS-ECU
Multi-centre display
Combination meter
note
Engine-A-M/T-ECU*: Engine automated manual transmission electronic control unit
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