SECTION 5 - JLG CONTROL SYSTEM
31215923
5-37
23108 2
3 "Function Problem - Lift Down Perma-
nently Selected"
Lift Up & Down Prevented
• The Ground Module Input for Ground Mode Lift Up (J4-7) is
High at Machine Power On.
• Check the select switch for damage or faulty wiring.
23245 2
3 "Elevation Sensors - Disagreement"
Lift Up is Prevented
• The Machine's Arm Angle Sensor is reading as Elevated and
the Platform Stow Switch is reading as Stowed.
• Check the platform stow switch status in the JLG Analyzer >
Diagnostics > Elev Sensor. The NO status should be Open,
and the NC status should be Closed in the stowed platform
position. Check the stow switch for damage or faulty wiring.
Check the stow switch arm is functioning properly. If stow
switch is operating correctly then check the Arm Angle Sen-
sor for damage or faulty wiring.
23264 2
3 "Platform Stow Switch - Faulty"
Lift Up is Prevented
• The UGM is detecting that the Platform Stow Switch NO and
NC inputs (J4-5/J4-8) are both reading the same state.
• Check switch for damage or faulty wiring. The Switch may
need replaced.
243
2
4 “Front Left Leveling Jack Pressure Trans-
ducer Failure”
No Restrictions.
• The Front Left Leveling Jack Pressure Transducer Voltage is
reading Greater than 4.75V or Less than 0.25V at UGM pin
J7-4.
• Check Pressure Transducer for damage or faulty wiring.
244
2
4 “Front Right Leveling Jack Pressure Trans-
ducer Failure”
No Restrictions.
• The Front Right Leveling Jack Pressure Transducer Voltage is
reading Greater than 4.75V or Less than 0.25V at UGM pin
J7-7.
• Check Pressure Transducer for damage or faulty wiring.
245
2
4 “Rear Left Leveling Jack Pressure Trans-
ducer Failure”
No Restrictions.
• The Rear Left Leveling Jack Pressure Transducer Voltage is
reading Greater than 4.75V or Less than 0.25V at UGM pin
J7-20.
• Check Pressure Transducer for damage or faulty wiring.
246
2
4 “Rear Right Leveling Jack Pressure Trans-
ducer Failure”
No Restrictions.
• The Rear Right Leveling Jack Pressure Transducer Voltage is
reading Greater than 4.75V or Less than 0.25V at UGM pin
J7-8.
• Check Pressure Transducer for damage or faulty wiring.
247
2
4 “Front Left Leveling Jack Stow Switch
Faulty “
No Restrictions.
• Front Left Leveling Jack Stow Switch is reading Stowed while
the rest of the Leveling Jack Switches are reading Set.
• Check switch for damage or faulty wiring.
248
2
4 “Front Right Leveling Jack Stow Switch
Faulty”
No Restrictions.
• Front Right Leveling Jack Stow Switch is reading Stowed
while the rest of the Leveling Jack Switches are reading Set.
• Check switch for damage or faulty wiring.
249
2
4 “Rear Left Leveling Jack Stow Switch
Faulty”
No Restrictions.
• Rear Left Leveling Jack Stow Switch is reading Stowed while
the rest of the Leveling Jack Switches are reading Set.
• Check switch for damage or faulty wiring.
2410
2
4 “Rear Right Leveling Jack Stow Switch
Faulty”
No Restrictions.
• Rear Right Leveling Jack Stow Switch is reading Stowed
while the rest of the Leveling Jack Switches are reading Set.
• Check switch for damage or faulty wiring.
25101 2
5 “Functions Prevented - Brakes Electroni-
cally Released For Towing”
All Machine Functions Prevented
• UGM is detecting that Electronic Brake release mode is
Active.
DTC
Code
Flash
Code
Description
Action
Item Check List
Summary of Contents for ERT2669
Page 2: ......
Page 4: ...INTRODUCTION A 2 31215923 REVISON LOG Original Issue A January 08 2021...
Page 12: ...viii 31215923 TABLE OF CONTENTS...
Page 40: ...SECTION 1 SPECIFICATIONS 1 22 31215923...
Page 58: ...SECTION 2 GENERAL 2 18 31215923...
Page 187: ...SECTION 4 BASIC HYDRAULIC INFORMATION SCHEMATICS 31215923 4 11...
Page 206: ...SECTION 4 BASIC HYDRAULIC INFORMATION SCHEMATICS 4 30 31215923...
Page 225: ...SECTION 4 BASIC HYDRAULIC INFORMATION SCHEMATICS 31215923 4 49...
Page 242: ...SECTION 4 BASIC HYDRAULIC INFORMATION SCHEMATICS 4 66 31215923...
Page 307: ...SECTION 5 JLG CONTROL SYSTEM 31215923 5 65...
Page 334: ...SECTION 6 LSS SETUP CALIBRATION SERVICE 6 12 31215923...
Page 362: ...SECTION 7 GENERAL ELECTRICAL INFORMATION SCHEMATICS 7 28 31215923...
Page 374: ...SECTION 7 GENERAL ELECTRICAL INFORMATION SCHEMATICS 7 40 31215923...
Page 375: ......
