Ground Output Driver; Contactor Driver Permanently On; Brake Short To Battery; Brake Open Circuit - JLG 1930ES Service Maintenance Manual

SECTION 6 - DIAGNOSTIC TROUBLE CODES
3-2 Line Contactor Short Circuit
DTC FAULT MESSAGE
322 CONTACTOR DRIVER PER-
MANENTLY ON

3-3 Ground Output Driver

DTC FAULT MESSAGE
331 BRAKE SHORT TO BATTERY The ground board detected voltage while
332

BRAKE OPEN CIRCUIT

333 LIFT UP SHORT TO BATTERY The ground board detected voltage while
334

LIFT UP OPEN CIRCUIT

335 LIFT DN SHORT TO BATTERY The ground board detected voltage while
336

LIFT DN OPEN CIRCUIT

337 STEER LEFT SHORT TO BAT-
TERY
6-10
DESCRIPTION
The power modules line contactor drive
circuitry failed to de-energize when
requested. Drive, steer and lift up pre-
vented.
DESCRIPTION
the brake solenoid was commanded off.
The ground board did not detect current
flow to the brake solenoid during normal
operation.
the lift up solenoid was commanded off at
power up.
The ground board did not detect current
flow to the lift up solenoid during power
up.
the lift down solenoid was commanded
off.
The ground board did not detect current
flow to the lift down solenoid during nor-
mal operation.
The ground board detected voltage while
the steer left solenoid was commanded
off at power up.
– JLG Lift –
CHECK
• Check continuity between contactor connector pin 1 and ground
board socket J1-19.
• Check continuity between contactor connector pin 2 and power
module 12 position connector terminal 8.
• Replace power module.
CHECK
• Ensure ANALYZER -> MACHINE SETUP -> ELEV PROX is set to
NOT INSTALLED.
• Ensure ANALYZER -> MACHINE SETUP -> ELEV PROX is set to
NOT INSTALLED.
• Check for continuity through this circuit. The lift up solenoid resis-
tance should measure about 30 Ohms. The lift up solenoid is
powered with 24V from ground board J1-25, and its ground is to
ground board J1-30, 37.
• Inspect the wiring for physical damage.
• Replace ground board.
• Check for continuity through this circuit. The lift up solenoid resis-
tance should measure about 30 Ohms. The lift up solenoid is
powered with 24V from ground board J1-25, and its ground is to
ground board J1-30, 37.
• Inspect the wiring for physical damage.
• Replace ground board.
• Check ANALYZER -> MACHINE SETUP -> ELEV PROX is set to
NOT INSTALLED
• Check for continuity through this circuit. The lift down solenoid
resistance should measure about 20 Ohms. The lift down sole-
noid is powered (PWM) by ground board J1-26, and its ground is
to ground board J1-27.
• Inspect the wiring for physical damage.
• Replace ground board.
• Check for continuity through this circuit. The lift down solenoid
resistance should measure about 20 Ohms. The lift down sole-
noid is powered (PWM) by ground board J1-26, and its ground is
to ground board J1-27.
• Inspect the wiring for physical damage.
• Replace ground board.
• Check for continuity through this circuit. Steer left solenoid resis-
tance should measure about 30 Ohms. The steer left solenoid is
powered with 24V from ground board J1-21, and its ground is to
ground board J1-30, 37.
• Inspect the wiring for physical damage.
• Replace ground board.
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