Communication; Canbus Failure - Power Module - Oshkosh JLG 1930ES Service Maintenance Manual

SECTION 6 - DIAGNOSTIC TROUBLE CODES
4-4 Battery Supply
DTC FAULT MESSAGE
4422 LOGIC SUPPLY VOLTAGE
OUT OF RANGE

6-6 Communication

DTC FAULT MESSAGE
661 CANBUS FAILURE -
POWER MODULE
6-16
DESCRIPTION
The system module logic supply
voltage was measured by the
power PCB to be less than 11V
for 10uS.
DESCRIPTION
The control system failed to
receive messages from the
power module.
CHECK
• This may be caused by a loose battery terminal,
severely discharged batteries, damaged battery, or an
improper wire harness connection.
• Drive, Steer, and Lift Prevented
• ZAPI - HEALTH (Status LED) - ON
• Check for 24V between power module 12 position
connector terminal 1 and the power module B- termi-
nal. If this is the problem, the line contactor may be
cycling on and off, making a clicking noise when the
machine is powered.
• Disconnect ground board J1 and power module con-
nector. Ground board socket J1-31 to power module
connector socket 10 should have continuity. Ground
board socket J1-32 to power module connector
socket 11 should have continuity.
• Turn on machine in platform mode. If DTC 662 is pres-
ent, troubleshoot that DTC before continuing.
CHECK
3121656