TM 5-2420-230-24-1
Table 3-3. Hydraulic Error Codes. -- Continued
DEVICE
LIKELY FAULT
CODE
TYPE
Bucket sensor wiring
Signal shorted to ground
22
3
Signal shorted to power
23
3
RPM
No RPM
25
3
Bad frequency
26
3
Controller
Internal fault, sensor reading circuits
92
3
Boom not calibrated
94
3
Loader bucket not calibrated
95
3
Internal fault, other
93
4
Load-holding valve solenoid
Overload or power output fault
55
4
Float valve section B
Overload or power output fault
56
4
Valve control wiring
Loader arm signal shorted to ground
71
4
Backhoe boom signal shorted to ground
72
4
Loader bucket signal shorted to ground
73
4
Backhoe bucket signal shorted to ground
74
4
Dipper signal shorted to ground
76
4
Auxiliary signal shorted to ground
77
4
Swing signal shorted to ground
78
4
4-in-1 signal shorted to ground
79
4
Loader arm signal shorted to power
81
4
Backhoe boom signal shorted to power
82
4
Loader bucket signal shorted to power
83
4
Backhoe bucket signal shorted to power
84
4
Dipper signal shorted to power
86
4
Auxiliary signal shorted to power
87
4
Swing signal shorted to power
88
4
4-in-1 signal shorted to power
89
4
Float valve section A
57
4
Stabilizer valve
Power output shorted to ground
59
4
3-14. TYPES OF REACTION OF ECU TO FAILURES DETECTED.
a. Type 1. The operation of the electronic control box continues as before, except FAILURE is displayed. If the supply
voltage overall is not correct, the equipment supply switch turns OFF the electronic control box. If DIAGNOSTIC
FAILURE (91) is activated, regulation inputs are ignored.
b. Type 2. Operation continues as before, except defective inputs are ignored (inactive state) and DEFECT is displayed
until the electronic control box is switched OFF by the operator. If the error displayed involves a control lever, defective
outputs from the control lever are ignored.
