jcb EcoMAX - Low Fuel Level Switch; Electric Lift Pump; Displays; Power Relay Box

JCB EcoMAX Engine Installation Manual
© JCB Power Systems Ltd. 320/A9164-1 Page 43 of 64
13.7.3 Low Fuel Level Switch
The engine ECU needs a low fuel level input. The input can be hard wired or through a CAN
Bus message. When a hard wired input is selected and Pin #46 is switched to ground, a low
fuel level condition is determined. Please contact JCB Power Systems Applications
department for more information.
13.7.4 Electric Lift Pump
The JCB EcoMAX Common Rail engine uses an electric lift pump and fuel pre filter supplied
loose with the engine. This unit must not be installed on the engine but to the machine
chassis as close as possible to the engine and away from significant sources of vibration.
The electric lift pump is a 12 V device and is controlled by the engine ECU through a suitable
(10 A
DC
, SPNO) relay. The ECU will disable the electric lift pump if the engine is not run
within 15 seconds of the ignition being switched on. The electric lift pump and fuel pre filter
also incorporates a water in fuel sensor which must be connected to the engine ECU. The
positive feed to the water in the fuel sensor must come from the ignition relay.
13.7.5 Displays
CAN enabled displays driven by the CAN Bus must be capable of supporting messages
which conform to the SAE J1939 communication protocol. Please contact JCB Power
Systems Applications department for more information and advice.
13.7.6 Power Relay Box
Included within the scope of supply is a Power Relay and Distribution box which includes
various fuses and relays for the operation. This component should be mounted in a position
where it is not subjected to excessive vibration, temperature and where service access is
possible to change fuses if required.
Power relays included within the box carry out the following fuctions:
Power Hold Relay
Grid Heater Relay
Fuel Lift Pump Relay
13.7.7 Fault Manager
Faults on the ECU system are managed and displayed through a CAN enabled display.
Fault diagnosis is also available through the JCB ServiceMaster
TM
tool. Please contact JCB
Power Systems for more information.