JLG TOUCAN 8E Service And Maintenance Manual page 149

DTC FAULT MESSAGE
2379 MAIN MAST LIMIT SWITCH -
NOT RESPONDING
2380 MAIN MAST LIMIT SWITCH -
FAULTY
2381 MAST LIMIT SWITCH 2 -
FAULTY
2382 FUNCTION PREVENTED -
OVERSWING DETECTED
31210090
DESCRIPTION
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.
The structure is swung beyond the rear
tires or further in either direction.
– JLG Lift –
SECTION 10 - DIAGNOSTIC TROUBLE CODES
• 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).
• If the structure is in line with the chassis, check the
Drive Orientation switch (on the turntable) for dam-
age.
• Check the switch setting (refer to Section 8)
• Check the switch wiring :
Structure in line with the chassis :
@+Vbatt : CR21(1), CR21(2);
@ -Vbatt : CR21(3).
Structure swung :
@+Vbatt : CR21(1);
@ -Vbatt : CR21(3);
Insulated : CR21(2).
CHECK
10-7