JLG TOUCAN 10E Service And Maintenance Manual page 118

SECTION 10 - DIAGNOSTIC TROUBLE CODES
DTC FAULT MESSAGE
MAIN MAST LIMIT SWITCH -
2378
DECOUPLED
MAIN MAST LIMIT SWITCH -
2379
NOT RESPONDING
MAIN MAST LIMIT SWITCH -
2380
FAULTY
MAST LIMIT SWITCH 2 -
2381
FAULTY
10-6
DESCRIPTION
The information from the Mast Limit
switches is not consistent.
The status of the Main Mast limit switch
does not change while raising the mast.
N.O. and N.C. contacts show the same
electrical status for more than 1 second.
N.O. and N.C. contacts show the same
electrical status for more than 1 second.
– JLG Lift –
CHECK
• Check if one of the concerned limit switches is
damaged, obstructed or jammed.
• Check the mast switches wiring :
Mast stowed :
@ +Vbatt : CR4(A), CR23(1), CR23(4), CR23(3),
CR23(6), CR5(3), CR5(5), CR2(31), CR2(20).
@ -Vbatt : CR4(B), CR4(C), CR23(2), CR23(5).
Mast elevated :
@ +Vbatt : CR4(A), CR4(B), CR23(1), CR23(2),
CR23(4), CR23(6), CR5(5), CR2(20).
@ -Vbatt : CR4(C), CR23(3), CR23(5), CR5(3),
CR2(31).
Mast fully elevated :
@ +Vbatt : CR4(A), CR4(B), CR4(C), CR23(1),
CR23(2), CR23(4), CR23(5).
@ -Vbatt : CR23(3), CR23(6), CR5(3), CR5(5),
CR2(20), CR2(31).
• If the mast is not raising while the function is con-
trolled :
- Pump not running : check the voltage applied to the
pump motor;
- Pump running : check the oil level; check the
hydraulic pressure and the voltage applied to the
pressure relief valve; check mast lift valve; check
the mast for obstruction or damages.
• If the mast is raising while the function is controlled :
- Check if the Main Mast limit switch (left switch) is
damaged, obstructed or jammed;
- Check the Main Mast limit switch wiring :
Mast stowed :
@ +Vbatt : CR4(A), CR23(1), CR23(3), CR5(3),
CR2(31).
@ -Vbatt : CR4(B), CR23(2).
Mast elevated :
@ +Vbatt : CR4(A), CR4(B), CR23(1), CR23(2).
@ -Vbatt : CR23(3), CR5(3), CR2(31).
• Check if the Main Mast limit switch (left switch) is
damaged;
• Check the Main Mast limit switch wiring :
Mast stowed :
@ +Vbatt : CR4(A), CR23(1), CR23(3), CR5(3),
CR2(31).
@ -Vbatt : CR4(B), CR23(2).
Mast elevated :
@ +Vbatt : CR4(A), CR4(B), CR23(1), CR23(2).
@ -Vbatt : CR23(3), CR5(3), CR2(31).
• Check if the Main Mast limit switch (left switch) is
damaged;
• Check the Main Mast limit switch wiring :
Mast stowed :
@ +Vbatt : CR4(A), CR23(4), CR23(6), CR5(5),
CR2(20).
@ -Vbatt : CR4(C), CR23(5).
Mast elevated :
@ +Vbatt : CR4(A), CR4(C), CR23(4), CR23(5).
@ -Vbatt : CR23(6), CR5(5), CR2(20).
31210090