CAN Buses

The Nissan Leaf uses multiple CAN buses. The two most researched and most important are EV-CAN and CAR-CAN.

CAR-CAN (or VEHICLE CAN)

This bus connects various low-voltage control systems, including:

• Vehicle Control Module (VCM)
• Intelligent Power Distribution Module (IPDM)
• Combination Meter
• Vehicle Sound for Pedestrians (VSP) module
• Body Control Module (BCM)
• CAN Gateway

EV-CAN

This bus connects the high-voltage components, plus the VCM. Devices on this bus:

• Vehicle Control Module (VCM)
• Traction Motor Inverter
• Power Delivery Module (PDM)
• Air Conditioning system
• Lithium Battery Controller (LBC)
• CAN Gateway

CHASSIS-CAN

Devices on this bus:

• Steering angle sensor
• EPS control unit
• Chassis Control Module
• Electric parking brake
• Brake control module
• ABS system
• CAN Gateway

ADAS-CAN

Stands for "Advanced Driver Assistance System".

Devices on this bus:

• ADAS control unit
• Chassis Control Module
• CAN Gateway

ITS-CAN

May stand for "Intelligent Transportation Systems".

Devices on this bus:

• Around View Monitor Control Unit
• Side radars (left and right)
• Distance sensor
• Lane camera unit
• ADAS control unit
• CAN Gateway

AV-CAN

Only for ZE0/AZE0. Connects the buttons surrounding the AV Control Unit to the AV Control Unit.

IT-CAN

May stand for "Information Technology".

The functionality of the IT-CAN bus is not well-documented. Devices on this bus:

• Telematics Control Unit (TCU)
• AV Control Unit
• CAN Gateway

M-CAN

Devices on this bus:

• Telematics Control Unit (TCU)
• Combination Meter
• AV Control Unit

External Links

• https://github.com/dalathegreat/leaf_can_bus_messages