JLG G12-55A AccuPlace Service Manual - Manual (Page 214)

Electrical System
9.96 G10-55A & G12-55A AccuPlace
CANBUS
FAILURE – BOOM
LENGTH
SENSOR 6624 UGM has not received Left
Boom Angle Sensor CAN
Bus message within 120ms. Y Cycle power to see if fault clears. If
multiple CAN Bus faults are occurring, the
integrity of connections and continuity of
the entire CAN Bus must be checked.
Otherwise, plug and unplug each end of
the Boom Length cable, both at the sensor
and CAN Distribution module. Verify
integrity of pins and that none are bent
within the small round M12 connector. If
fault still exists after cycling power,
disconnect cable at Boom Angle sensor
and connect to Boom Length sensor (may
need to unbolt length sensor). If Boom
Length CAN Bus fault still exists (Boom
Angle CAN Bus fault will also be present
since that sensor is disconnected), then
Boom Length sensor can be considered
suspicious. If fault clears, then try Boom
Angle cable at connection occupied by
Boom Length sensor to verify the integrity
of CAN Distribution module. If successful,
replace Boom Length cable.
Check sensor for damage.
CANBUS
FAILURE – FORK
SENSOR 6625 UGM has not received Left
Boom Angle Sensor CAN
Bus message within 60ms. Y Cycle power to see if fault clears. If
multiple CAN Bus faults are occurring, the
integrity of connections and continuity of
the entire CAN Bus must be checked.
Otherwise, unplug the Fork sensor and
with a multimeter verify approximately
60ohms between CAN-H and CAN-L in
the machine harness. Turn power on a
verify +12V between power and ground
pins. Also, verify that the ground pin has
less than 1.0ohms resistance to a good
chassis (B-) connection. Turn power off,
reconnect Fork sensor and power on. If
fault still exists, check connections for
Fork sensor. Remove the 4 screws
holding the sensor and firmly, but gently
wiggle the connector forward to get to the
back of the 4-pin Deutsch connector.
Remove each pin and check the integrity
of the terminations. Prior to reinserting into
cylinder, sealant must be applied in back
of connector flange to prevent water
intrusion.
Help Message
1
DTC Fault Condition
(for configurable items,
fault applies only if
configured)
Fault
Requires
AccuPlace
Reset?
Action(s)