Module Communications Network: Other Land Rover Range Rover III facelift

AiNET

The Ai Net is an Alpine proprietary network used to communicate between the Rear Seat Entertainment module and the digital versatile disc (DVD) autochanger.

CAN BUS

The controller area network (CAN) bus is a high speed broadcast network where control modules automatically transmit information every few milliseconds. Information is broadcast down a pair of twisted wires, known as controller area network (CAN) high and controller area network (CAN) low. Information is transmitted on the controller area network (CAN) bus as a voltage difference between the 2 wires.

Two controller area network (CAN) networks are used on the vehicle; medium speed and high speed, with the instrument cluster acting as a gateway between the 2 networks.

Both the medium and high speed controller area network (CAN) bus are connected to the instrument cluster and the diagnostic socket. The medium speed controller area network (CAN) bus terminates at the integrated head unit and the immobilization control module. The high speed controller area network (CAN) bus terminates at the parking brake control module and the anti-lock brake system (ABS) control module.

Control modules are connected in a loop or spur configuration. Should a control module that is looped suffer a connector failure, the bus system will separate into 2 sub-busses. Some communication may still be possible within each sub-bus, but symptoms may be noticed by the driver.

GVIF

The GVIF bus is a Sony proprietary network for the transmission of video between a transmitter device and a display device. In this instance it is used to transmit navigation graphics from the navigation computer to the Touch Screen Display only.

I BUS

The I bus is a Land Rover corporate network connected between control modules of the 'Information and Entertainment' systems.

IS BUS

The IS bus is a dedicated Land Rover corporate network used to transfer information between the rear seat entertainment module and the two rear liquid crystal display (LCD) screens.

K BUS

The K bus is a Land Rover corporate network connected between control modules of the 'body' systems.

LIN BUS

The LIN bus is a low speed broadcast network that employs master and slave components. The master component transmits a message along a single wire to the slave components identifying which slave is to respond. The message has a header (slave identifier) and an empty data field. The identified slave component fills the data field with the relevant information and returns a message to the master component along the same wire.

M BUS

The M bus is a Land Rover corporate network connected between the automatic temperature control (ATC) module and motors on the heater assembly.

MOST RING

The MOST ring uses fiber optic cables to transport data and audio signals around the information and entertainment system. The fiber optic cables are arranged in a ring, with each unit on the ring having a 'MOST in' and 'MOST out' connection.

The MOST ring is a synchronous network. A timing master supplies the clock and all other components on the ring synchronize their operation to this clock. The timing master for the MOST ring is the integrated head unit.

When handling MOST fiber optic cables the following precautions should be observed

1. After disconnection of any cables carefully install appropriate dust caps to protect the mating faces of the connectors from damage and contamination.
2. Avoid introducing bends of less than 25 mm (0.98 inches) radius or kinks into the fibre optic cable during service or repair. Tight bends or kinks could impair operation, cause immediate system failure, or future system failure.
3. Avoid excessive force, strain or stress on the fibers or connectors especially permanent stress after reinstallation.

P BUS

The P bus is a Land Rover corporate network connected between the generic electronic module (GEM) and 'peripheral' control modules.

SPDIF

The SPDIF is an digital optical network connected between the digital versatile disc (DVD) autochanger and the audio amplifier and is used to output the audio from the digital versatile disc (DVD) autochanger to the audio amplifier.

Scheme 9

Note. S = AiNet

Scheme 10

Note. N = Medium speed controller area network (CAN) bus

Note. Terminating resistors for the medium speed controller area network (CAN) bus are located in the integrated head unit and the immobilization control module

Scheme 11

Note. D = High speed controller area network (CAN) bus

Note. Terminating resistors for the high speed controller area network (CAN) bus are located in the anti-lock brake system (ABS) module and the parking brake control module.

Scheme 12

Note. C = DS2 diagnostic bus

Scheme 13

Note. Q = GVIF

Scheme 14

Note. K = I bus

Scheme 15

Note. X = IS bus

Scheme 16

Note. B = K bus

Scheme 17

Note. O = Local Interconnect Network (LIN) bus

Note. The LIN bus is a private network and does not communicate with other networks.

Scheme 18

Note. L = M bus

Scheme 19

Note. P = Media Orientated System Transport (MOST) ring

Scheme 20

Note. M = P bus

Scheme 21

Note. R = SPDIF