JLG 3248RS/10RS Service Manual - Manual (Page 120)

SECTION 6 - DIAGNOSTIC TROUBLE CODES
6-10 – JLG Lift – 3121273
336 LIFT DOWN VALVE - OPEN
CIRCUIT The power module did not detect cur-
rent flow to the lift down solenoid during
normal operation. (J2-16 NDV) • 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, and its ground is to
ground board.
• Inspect the wiring for physical damage.
• Replace ground board.
• HEALTH (Status LED) - ON
337 STEER LEFT VALVE - SHORT
TO BATTERY Voltage from an external source was
detected on the Steer Left Solenoid (J2-
9 NLV). • 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 J2-1, and its ground is to
ground board J2-9.
• Inspect the wiring for physical damage.
• Replace ground board.
• HEALTH (Status LED) - ON
338 STEER LEFT VALVE - OPEN
CIRCUIT Current flow to the Steer Left Solenoid
was not detected (J2-9 NLV). • 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, and its ground is to ground
board.
• Inspect the wiring for physical damage.
• Replace ground board.
• HEALTH (Status LED) - ON
339 STEER RIGHT VALVE -
SHORT TO BATTERY Voltage from an external source was
detected on the Steer Left Solenoid (J2-
18 NRV). • Check for continuity through this circuit. Steer right solenoid
resistance should measure about 30 Ohms. The steer right sole-
noid is powered with 24V from ground board J2-1, and its ground
is to ground board J2-18.
• Inspect the wiring for physical damage.
• Replace ground board.
• HEALTH (Status LED) - ON
3310 STEER RIGHT VALVE - OPEN
CIRCUIT Current flow to the Steer Right Solenoid
was not detected (J2-18 NRV). • Check for continuity through this circuit. Steer right solenoid
resistance should measure about 30 Ohms. The steer right sole-
noid is powered with 24V from ground board, and its ground is to
ground board.
• Inspect the wiring for physical damage.
• Replace ground board.
• HEALTH (Status LED) - ON
3312 LEFT BRAKE - SHORT TO
BATTERY Voltage from an external source was
detected on the Left Brake Solenoid (J1-
34 NLB). • Check for continuity through this circuit. The left brake is powered
with 24V from ground board J1-29, and its ground is to ground
board J1-34. Brake solenoid resistance should measure about 20
Ohms.
• Inspect the wiring for physical damage.
• Replace ground board.
3313 RIGHT BRAKE SHORT TO
BATTERY Voltage from an external source was
detected on the Right Brake Solenoid
(J1-33 NRB). • Check for continuity through this circuit. Brake solenoid resis-
tance should measure about 20 Ohms. The right brake is powered
with 24V from ground board J1-30, and its ground is to ground
board J1-33.
• Inspect the wiring for physical damage.
• Replace ground board.
3-3 Ground Output Driver
DTC FAULT MESSAGE DESCRIPTION CHECK