JLG 3246ES Service Manual - Manual (Page 164)

SECTION 6 - DIAGNOSTIC TROUBLE CODES
6-12 – JLG Lift – 3121166
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.
339 STEER RIGHT SHORT TO
BATTERY The ground board detected
voltage while the steer right
solenoid was commanded off. • Check for continuity through this circuit. Steer right
solenoid resistance should measure about 30 Ohms.
The steer right solenoid is powered with 24V from
ground board J1-22, and its ground is to ground
board J1-30, 37.
• Inspect the wiring for physical damage.
• Replace ground board.
3310 STEER RIGHT OPEN CIR-
CUIT
The ground board did not
detect current flow to the steer
right solenoid during normal
operation. • Check for continuity through this circuit. Steer right
solenoid resistance should measure about 30 Ohms.
The steer right solenoid is powered with 24V from
ground board J1-22, and its ground is to ground
board J1-30, 37.
• Inspect the wiring for physical damage.
• Replace ground board.
3311 GROUND ALARM
SHORT TO BATTERY
The ground board detected
voltage while the ground alarm
was commanded off. • Check for continuity through this circuit. The ground
alarm solenoid is powered with 24V from ground
board J1-19, its PWM signal is from ground board J1-
28, and its ground is to ground board J1-30, 37. There
should be about 1500 Ohms between ground alarm
connector pin 1 and pin 3.
• Inspect the wiring for physical damage.
• Replace ground board.
3-3 Ground Output Driver
DTC FAULT MESSAGE DESCRIPTION CHECK