JLG 3246ES Service Manual - Manual (Page 167)

SECTION 6 - DIAGNOSTIC TROUBLE CODES
3121166 – JLG Lift – 6-15
444 LSS BATTERY VOLTAGE
TOO LOW The load sensing system mod-
ule momentarily measured bat-
tery voltage < 9V. • Recharge batteries or check for damaged batteries.
• Refer to Section 2.3: Troubleshooting in the LSS man-
ual, 3124288.
446 LOGIC SUPPLY VOLTAGE
OUT OF RANGE The system module logic supply
voltage was measured to be out
of normal operating range by
the interface PCB (<11V). • 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
4421 LOGIC SUPPLY VOLTAGE
OUT OF RANGE
The system module logic supply
voltage was measured by the
power PCB to be more than 34V
for 10uS. • 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
4422 LOGIC SUPPLY VOLTAGE
OUT OF RANGE
The system module logic supply
voltage was measured by the
power PCB to be less than 11V
for 10uS. • 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
6-6 Communication
DTC FAULT MESSAGE DESCRIPTION CHECK
661 CANBUS FAILURE -
POWER MODULE The control system failed to
receive messages from the
power module. • 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.
4-4 Battery Supply
DTC FAULT MESSAGE DESCRIPTION CHECK