jcb JS300 Service Manual page 476

Removal and Replacement Guide
The DECU is a reliable and robust component. Before
removing and replacing the DECU carry out all the relevant
1
7
Removal
The DECU is bound on the CANbus system. Do not
remove or disconnect the DECU unless you have access
to the applicable JCB Servicemaster software tools.
1 Park the machine and make it safe. Obey the care
and safety procedures. Refer to Section 2,
Maintenance.
2 Use Servicemaster to view the machine Set-up.
Record the details from the Set-up screen. Refer to
Servicemaster SYSTEM.
3 Carry out the unlock binding procedure. Refer to the
ECU Set-up instructions.
4 Carry out the correct power down sequence.
Set-up ( T C-39)
5 Disconnect the harness connectors 5 (J1) and the
grey harness connector 6 (J2) at the DECU. Do not
touch the connector pins. Put some tape over the
connectors to protect the pins.
6 Remove three screws 7 and cover 1.
C-51
2
6
K ECU Set-up ( T C-39)
K ECU
9813/5100-1
diagnostic and fault finding procedures. Most faults are
usually due to damaged wires, connectors or connected
devices such as switches or sensors.
3
5
Fig 11.
7 Support the DECU and remove four screws 3.
Remove the DECU from the machine.
Replacement
Replace the DECU as follows:
1 Connect the harness connectors at the correct
sockets on the MECU.
2 Torque tighten the screws 7 and 3 to 4 Nm.
3 Carry out the correct power up procedure.
Set-up ( T C-39)
4 Use Servicemaster to install the ECU software. Refer
to Servicemaster SYSTEM.
5 Use Servicemaster to enter the applicable machine
set-up options. Refer to Servicemaster SYSTEM.
6 Use Servicemaster to bind the machine ECU's.
K ECU Set-up ( T C-39)
7 Use Servicemaster to update the immobiliser lock
and unlock codes.
Section C - Electrics
Electronic Controllers
Display ECU (DECU)
4
K ECU Set-up ( T C-39)
C128590
K ECU
C-51