SECTION 8 - DIAGNOSTIC TROUBLE CODES
3121222
– JLG Lift –
8-11
322
CONTACTOR DRIVER
PERMANENTLY ON
The power modules line contac-
tor drive circuitry failed to de-
energize when requested. Drive,
steer and lift up prevented.
•
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.
3-3 Ground Output Driver
DTC
FAULT MESSAGE
DESCRIPTION
CHECK
331
BRAKE SHORT TO BAT-
TERY
The ground board detected
voltage while the brake sole-
noid was commanded off.
•
Ensure ANALYZER -> MACHINE SETUP -> ELEV PROX is set to NOT
INSTALLED.
332
BRAKE OPEN CIRCUIT
The ground board did not
detect current flow to the brake
solenoid during normal opera-
tion.
•
Ensure ANALYZER -> MACHINE SETUP -> ELEV PROX is set to NOT
INSTALLED.
333
LIFT UP SHORT TO BAT-
TERY
The ground board detected
voltage while the lift up sole-
noid was commanded off at
power up.
•
Check for continuity through this circuit. The lift up solenoid resistance
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.
334
LIFT UP OPEN CIRCUIT
The ground board did not
detect current flow to the lift up
solenoid during power up.
•
Check for continuity through this circuit. The lift up solenoid resistance
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.
335
LIFT DN SHORT TO BAT-
TERY
The ground board detected
voltage while the lift down sole-
noid was commanded off.
•
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 solenoid 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.
336
LIFT DN OPEN CIRCUIT
The ground board did not
detect current flow to the lift
down solenoid during normal
operation.
•
Check for continuity through this circuit. The lift down solenoid resistance
should measure about 20 Ohms. The lift down solenoid 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.
337
STEER LEFT SHORT TO
BATTERY
The ground board detected
voltage while the steer left sole-
noid was commanded off at
power up.
•
Check for continuity through this circuit. Steer left solenoid resistance
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.
338
STEER LEFT OPEN CIR-
CUIT
The ground board did not
detect current flow to the steer
left solenoid during normal
operation.
•
Check for continuity through this circuit. Steer left solenoid resistance
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.
3-2 Line Contactor Short Circuit
DTC
FAULT MESSAGE
DESCRIPTION
CHECK
Summary of Contents for 1230ES
Page 1: ...AS NZS Service and Maintenance Manual Model s 1230ES P N 3121222 June 22 2017 ...
Page 2: ...NOTES ...
Page 24: ...SECTION 1 MACHINE SPECIFICATIONS 1 12 JLG Lift 3121222 NOTES ...
Page 32: ...SECTION 2 GENERAL SERVICE INFORMATION 2 8 JLG Lift 3121222 NOTES ...
Page 78: ...SECTION 4 BASE COMPONENTS 4 40 JLG Lift 3121222 NOTES ...
Page 104: ...SECTION 5 CONTROL COMPONENTS 5 26 JLG Lift 3121222 NOTES ...
Page 158: ...SECTION 8 DIAGNOSTIC TROUBLE CODES 8 22 JLG Lift 3121222 NOTES ...
Page 198: ...SECTION 9 GENERAL ELECTRICAL INFORMATION SCHEMATICS 9 40 JLG Lift 3121222 ...
Page 199: ...SECTION 9 GENERAL ELECTRICAL INFORMATION SCHEMATICS 3121222 JLG Lift 9 41 ...
Page 200: ...SECTION 9 GENERAL ELECTRICAL INFORMATION SCHEMATICS 9 42 JLG Lift 3121222 ...
Page 202: ...SECTION 9 GENERAL ELECTRICAL INFORMATION SCHEMATICS 9 44 JLG Lift 3121222 NOTES ...