Steer Right Short To Battery; 3310 Steer Right Open Circuit; 3311 Ground Alarm Short To Battery; 3312 Left Brake Short To Battery - Oshkosh JLG 1930ES Service Maintenance Manual

3-3 Ground Output Driver
DTC FAULT MESSAGE
339 STEER RIGHT SHORT TO
BATTERY
3310 STEER RIGHT OPEN CIR-
CUIT
3311 GROUND ALARM
SHORT TO BATTERY
3312 LEFT BRAKE SHORT TO
BATTERY
3313 RIGHT BRAKE SHORT TO
BATTERY
3314 LEFT BRAKE OPEN CIR-
CUIT
3315 RIGHT BRAKE OPEN CIR-
CUIT
33297 LEFT BRAKE - SHORT TO
GROUND
3121656
DESCRIPTION
The ground board detected
voltage while the steer right
solenoid was commanded off.
The ground board did not
detect current flow to the steer
right solenoid during normal
operation.
The ground board detected
voltage while the ground alarm
was commanded off.
The ground board detected
voltage while the left brake was
commanded off.
Voltage was detected on the
right brake solenoid when the
ground board output was com-
manded off during power-up.
Current flow to the left brake
solenoid was not detected dur-
ing normal left brake operation.
The ground board did not
detect current flow to the right
brake during normal operation.
Drive and Steer Prevented
SECTION 6 - DIAGNOSTIC TROUBLE CODES
CHECK
• 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.
• 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.
• 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.
• Check for continuity through this circuit. The left
brake is powered with 24V from ground board J1-23,
and its ground is to ground board J1-30, 37. Brake
solenoid resistance should measure about 20 Ohms.
• Inspect the wiring for physical damage.
• Replace ground board.
• Check for continuity through this circuit. Brake sole-
noid resistance should measure about 20 Ohms. The
right brake is powered with 24V from ground board
J1-24, 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 left
brake is powered with 24V from ground board J1-23,
and its ground is to ground board J1-30, 37. Brake
solenoid resistance should measure about 20 Ohms.
• Inspect the wiring for physical damage.
• Replace ground board.
• Check for continuity through this circuit. Brake sole-
noid resistance should measure about 20 Ohms. The
right brake is powered with 24V from ground board
J1-24, and its ground is to ground board J1-30, 37.
• Inspect the wiring for physical damage.
• Replace ground board.
• Excessive current flow to the Left Brake Solenoid was
detected (J1-34 NLB).
• ZAPI - HEALTH (Status LED) - ON
6-13