OPERATOR'S MANUAL MAINTENANCE

Section C - Electrics
Basic System Operation
A.M.S (Advanced Management System)
C-9 C-9
9803/9880-3
A.M.S (Advanced Management System)
TC-011
Operation
The JCB A.M.S system is a whole machine electronic
control system. The system controls engine speed, pump
power, transmission, excavator functions, lights, wiper,
auxiliary circuits, warning lamps, etc. The system is a 'CAN
BUS' system which links Electronic Control Units (ECUs)
on the vehicle. This stands for 'Controlled Area Network'
and uses a special cable in the vehicle harness which
consists of two signal wires twisted together covered by a
metal foil to prevent any electrical interference. These
signal wires form the CAN -BUS. The CAN - BUS is used
to send text and fault codes between the ECUs. The
electronic units receive inputs from switches and sensors
and drive outputs such as solenoids, lamp bulbs and
motors. The outputs of the ECUs are rated to the current
requirement of the actuator.
The system comprises of the following main electronic
components.
C030670-C3
Fig 6.
401741-C4
Fig 7.
A Electronic Control Unit -1 (ECU-1)
B Electronic Monitoring System (EMS)
C Fascia switch panel (FSP).
D Engine Control Module (ECM)
A
D
401741-C3
C
B