SECTION 5 - JLG CONTROL SYSTEM
5-14 – JLG Lift– 3121166
2 5 E LEV PROX PERM ANENTLY CLOSED – CHECK
PROX AND ANGLE ADJUSTMENT
The Elevation Proximity Switch is closed to indicate that the
platform is stowed, but the elevation sensor’s voltage indi-
cates that the platform is elevated. To be conservative, the
control system will assume that the platform is elevated,
and the drive speed will be restricted to elevated.
Elevation Sensor is “Healthy” AND
the Elevation Sensor’s
Zeroed Voltage is > 0.15V AND the Elevation Prox Switch
is Closed for 2000mS. Retained until situation changes.
Refer to Platform Position Sensor Functionality.
Check elevation switches.
Replace if necessary.
2 5 DRIVE & LIFT PREVENTED – BRAKES ELECTRI-
CALLY RELEASED FOR TOWING
The manual brake release has been activated to allow the
vehicle to be towed.
Brake release digital input is energized
Drive and Lift Prevented
Disengage the manual brake
release.
2 5 DRIVE PREVENTED – ELEVATED ABOVE DRIVE
CUTOUT HEIGHT
The Drive Cutout functionality is enabled, and the platform
is elevated above the calibrated cutout height.
Drive Cutout is set to 1=YES AND
the Elevation Sensor is
“Healthy” AND the Elevation Sensor’s Zeroed Voltage is
Greater Than the Calibrated Drive Cutout Voltage.
Refer to Drive Cutout Functionality.
Check elevation switches
Check pothole switches.
2 5 M ODEL CHANGED -- HYDRAULICS SUSPEN DED
- CYCLE EMS
The model selection has been changed. Check ANALYZER ->
MACHINE SETUP -> MODEL
NUMBER.
Replace ground board.
2 5 DRIVE PREVENTED -- BRAKES NOT RELEASING While driving on a level surface, armature current was >
150A for five seconds. Brakes assumed to not be releasing
properly.
Ensure vehicle is not stuck on
something preventing move-
ment. Check/repair drive
motor wiring, brakes or
mechanical issues.
Help messages with the 3-1 flash code indicate that a contactor did not close when energized.
3 1 OPEN CIRCUIT LINE CONTACTOR The Power Module’s line contactor drive circuitry passed
power-up self-tests, but the line contactor did not close
when energized.
The Power Module is reporting a “Contactor Did Not Close”
Fault Code (15d).
Drive, Steer, & Lift Up Prevented.
Refer to CANbus documenta-
tion for Power Module Mes-
sage - Status.
3 1 CONTACTOR DR IVER PERMANE NTLY OFF T he Power Modul e’s Line Conta ctor drive circuitry fa iled to
energize during power-up self-tests.
The Power Module is reporting a “Contactor Driver 1 Per-
manently Off” Fault Code (22d).
Drive, Steer, & Lift Up Prevented.
Refer to CANbus documenta-
tion for Power Module Mes-
sage - Status.
Help messages with the 3-2 flash code indicate that a contactor did not open when de-energized.
3 2 LINE CONTACTOR MISWIRED ON OR WELDED The Power Module’s Line Contactor Drive Circuitry passed
power-up self-tests, but the line contactor did not open
when de-energized.
The Power Module is reporting a “Contactor Welded” Fault
Code (14d).
Drive, Steer, & Lift Up Prevented.
Refer to CANbus documenta-
tion for Power Module Mes-
sage - Status.
Table 5-2. Flash Code Listing
FLASH
CODE
HELP MESSAGE CAUSE POSSIBLE RESOLVE
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