LR3/Disco 3
CONTROLLER AREA NETWORK (CAN)
The high speed CAN broadcast bus network is used to connect the powertrain modules. The CAN bus is connected
between the following electronic units:
High Speed CAN Bus
TCM
Instrument cluster
Air suspension module
Steering angle sensor
Rear differential module
Centre console switch pack
Electric park brake module
Restraints control module
Engine Control Module (ECM)
ABS control module
Adaptive front lighting control module
Transfer box control module
Adaptive cruise control module
Diagnostic socket.
The CAN bus allows a fast exchange of data between modules. The CAN bus comprises two wires which are identified as
CAN high (H) and CAN low (L). The two wires are coloured yellow/black (H) and yellow/brown (L) and are twisted
together to minimise electromagnetic interference (noise) produced by the CAN bus messages. For additional information,
refer to
Communications Network
(418-00 )
In the event of CAN bus failure, the following symptoms may be observed:
Transmission operates in default mode
Torque converter lock-up clutch control is disabled
Gear position indication in instrument cluster message centre inoperative (this will also occur with any
transmission fault).
DRIVING MODES
P096800
EPRS 3
Short circuit to ground or power break Circuit break
P097000
EPRS 3
Short circuit to ground
P097100
EPRS 3
Short circuit to power supply
P178300
Hot shutdown
General fault type
P182500
Shift interlock solenoid
Short circuit to ground Short circuit to power supply Circuit break
P271600
EPRS 4
Signal voltage too high or too low
P271800
EPRS 4
Short circuit to ground or power break Circuit break
P272000
EPRS 4
Short circuit to ground
P272100
EPRS 4
Short circuit to power supply
P272500
EPRS 5
Signal voltage too high or too low
P272700
EPRS 5
Short circuit to ground or power break Circuit break
P272900
EPRS 5
Short circuit to ground
P273000
EPRS 5
Short circuit to power supply
P275900
EPRS 6
Signal voltage too high
P276100
EPRS 6
Short circuit to ground or power break
P276200
EPRS 6
Signal voltage too small
P276300
EPRS 6
Short circuit to power supply
P276400
EPRS 6
Short circuit to ground
