JLG 3248RS/10RS Service Manual - Manual (Page 121)

SECTION 6 - DIAGNOSTIC TROUBLE CODES
3121273 – JLG Lift – 6-11
3314 LEFT BRAKE - OPEN CIRCUIT Current flow to the Left Brake Solenoid
was not detected (J1-34 NLB).
• Check for continuity through this circuit. The left brake is powered
with 24V from ground board, and its ground is to ground board.
Brake solenoid resistance should measure about 20 Ohms.
• Inspect the wiring for physical damage.
• Replace ground board.
• HEALTH (Status LED) - ON
3315 RIGHT BRAKE OPEN CIRCUIT Current flow to the Right Brake Solenoid
was not detected (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, and its ground is to ground board.
• Inspect the wiring for physical damage.
• Replace ground board.
• HEALTH (Status LED) - ON
3349 LINE CONTACTOR COIL -
SHORT TO GROUND An external short to ground was
detected on the Negative Main Line
Contactor (J1-32 NMC). • HEALTH (Status LED) - ON
33297 LEFT BRAKE - SHORT TO
GROUND Excessive current flow to the Left Brake
Solenoid was detected (J1-34 NLB). • HEALTH (Status LED) - ON
33298 STEER LEFT VALVE - SHORT
TO GROUND Excessive current flow to the steer left
solenoid detected (J2-9 NLV). • HEALTH (Status LED) - ON
33299 LINE CONTACTOR COIL -
SHORT TO BATTERY Voltage from an external source was
detected on the Negative Main Line
Contactor. • HEALTH (Status LED) - ON
33302 NEGATIVE SUPPLY - SHORT
TO BATTERY At power-up, the system module
detected an external short on J1-12, J1-
17, J1-23, J2-14 or J2-15 when in plat-
form mode. Normally these pins are
grounded by the System Module. All
functions are prevented to protect the
control system. • HEALTH (Status LED) - ON
33303 NEGATIVE SUPPLY - SHORT
TO GROUND At power-up, the System Module
detected an external short on J1-12, J1-
17, J2-14 or J2-15 when in platform
mode. Normally these pins are
grounded by the System Module. Since
the external ground may compromise
integrity, all functions will be prevented. • HEALTH (Status LED) - ON
33304 RIGHT BRAKE - SHORT TO
GROUND Excessive current flow to the Right
Brake solenoid was detected (J1-33
NRB). • HEALTH (Status LED) - ON
33305 STEER RIGHT VALVE -
SHORT TO GROUND Excessive current flow to the Steer
Right Solenoid was detected (J2-18
NRV). • HEALTH (Status LED) - ON
33406 LiFT UP VALVE - SHORT TO
GROUND Excessive current flow to the Lift Up
Solenoid was detected (J2-17 NUV). • HEALTH (Status LED) - ON
33407 LIFT DN VALVE - SHORT TO
GROUND Excessive current flow to the Lift Down
Solenoid was detected (J2-16 NDV). • HEALTH (Status LED) - ON
3-3 Ground Output Driver
DTC FAULT MESSAGE DESCRIPTION CHECK