CAN Gateway

The CAN Gateway is a module in the ZE1 Nissan Leaf. It connects multiple CAN Buses together. It is described in the service manual as a 6 channel CAN gateway, implying that it can communicate on up to 6 CAN buses. However, wiring diagrams show 10 different CAN bus connections, so it must in some cases either act as both ends of a bus, or operate in the middle of a bus with connections in and out.

Connections

The CAN Gateway has a single 24-pin connector (M101) of type TH24FW-NH.

Terminal No.	Color of Wire	Signal Name
1	L	VEHICLE CAN COMMUNICATION CIRCUIT-H
2	BR	ADAS CAN COMMUNICATION-H
3	W	BATTERY
4	SB	IT CAN COMMUNICATION CIRCUIT-H (EXCEPT FOR MEXICO)
5	B	GROUND
6	GR	CHASSIS CAN COMMUNICATION CIRCUIT-H
7	BR	ITS CAN COMMUNICATION CIRCUIT 2-H
8	L	DIAGNOSTIC CAN COMMUNICATION CIRCUIT-H
9	GR	CHASSIS CAN COMMUNICATION CIRCUIT-H
10	BR	ADAS CAN COMMUNICATION-H
11	L	DIAGNOSTIC CAN COMMUNICATION CIRCUIT-H
12	L	–
13	P	VEHICLE CAN COMMUNICATION CIRCUIT-L
14	W	ADAS CAN COMMUNICATION-L
15	G	IGNITION
16	V	IT CAN COMMUNICATION CIRCUIT-L (EXCEPT FOR MEXICO)
17	B	GROUND
18	G	CHASSIS CAN COMMUNICATION CIRCUIT-L
19	R	ITS CAN COMMUNICATION CIRCUIT 2-L
20	W	DIAGNOSTIC CAN COMMUNICATION CIRCUIT-L
21	G	CHASSIS CAN COMMUNICATION CIRCUIT-L
22	W	ADAS CAN COMMUNICATION-L
23	W	DIAGNOSTIC CAN COMMUNICATION CIRCUIT-L
24	G	–

Accessing CAN buses

Pins	Bus	Comments
10+2, 22+14		10 and 2 are joined at M09, 22 and 14 are joined ADAS
6, 18 at one end, 9,21 at the other		Steering angle sensor, EPS control unit, chassis control module, parking brake, brakes, ABS
4,16	IT-CAN	AV control unit, TCU, CAN terminator
1,13		VCM, IPDM, Air bag diagnosis, combination meter, keyless entry, TPMS, VSP, BCM
12,24	EV-CAN	VCM, Inverter, PDM, A/C, LBC
7,19	ITS-CAN	Around View Monitor Control Unit, Side Radars, CAN terminator (ITS)

External Links

• https://blog.jingo.uk/notes-on-integrating-a-nissan-leaf-ze1-and-home-assistant/