JCB EcoMAX Engine Installation Manual
Page 38 of 64 320/A9164-1 © JCB Power Systems Ltd.
(pin numbers 58, 59, 61, 62)) as close to the ECU as possible. Make the splice using
ultrasonic weld and cover it in adhesive lined heat shrink. Make the ECU ground as close as
possible to the battery negative, while retaining the battery isolator if fitted.
Twisted core shielded cable to SAE J 1939-11 specification must be used for all CAN Bus
wires. A minimum of 33 twists per metre must be used, with the twist starting and finishing as
close to the connector shells as possible.
The installer must make sure that:
The ECU is earthed back to the battery negative terminal, through the isolator
where fitted.
All loads must be powered through the ECU in accordance with the Electrical
Wiring Diagrams chapter.
The ECU will take a maximum of 40 seconds to remove power from the control
system through the Power Hold Relay, following removal of the switched
ignition supply. Therefore, the Power Hold Relay coil must take a supply from
the battery positive and not the switched ignition supply. During this time, the
power must not be removed through the battery isolator.
All CAN Bus wiring must be terminated with two 120 Ω resistors (60 Ω total resistance) at
each end of the CAN Bus. CAN Bus termination is not provided in the ECU. If the ECU is
located at the end of the CAN Bus, you need to make a ‘splice’ into the harness as close to
the ECU as possible to accommodate the CAN termination resistor. CAN terminating
resistors are available from JCB Power Systems in either 2 way; JCB part no. 7212/0059 or
3 way; JCB part no.727/00002 or 727/00003.
13.6 Required Operator Warnings
13.6.1 Operator Interface & Warnings
For more information please refer to JCB Systems Integration Document 320/A9167 or
contact JCB Applications Department.
The following warnings must be displayed to the operator in a clean clear position:
Oil low pressure
Coolant over temperature (Configured to Specific Coolant Temperature)
Check engine
Malfunction indicator
Water in fuel
Alternator charging indication
J1939 Suspect Parameter Numbers (SPN) and Failure Mode Indicator (FMI)
codes
In addition there are specific aftertreatment warnings which must be displayed to meet
legislative requirements. Please refer to the Systems Integration Document 320/A9167 for
these requirements. This document also defines the inducement strategy which is outlined in
both Figure 7 and Figure 8.
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