TM 5-5420-234-14&P
Table 4-1. Error Codes for LHS Digital Contoller
Ec01
Data line is open
Loss of power or ground
Ec02
Short or open detected to Main Unload Valve Solenoid
Eco3
Short or open detected to Main Load Valve Solenoid
Ec04
Short or open detected to Hook Arm Unload Valve Solenoid
Ec05
Short or open detected to Hook Arm Load Valve Solenoid
Ec06
Short or open detected to Winch Out Valve Solenoid
Ec07
Short or open detected to Winch in Valve Solenoid
Ec08
Short or open detected to Free Flow Valve Solenoid
Ec09
Short or open detected to High Idle Solenoid
Ec11
Short or open detected to Hand-held Spotlight Circuit
Ec12
Short or open detected to Main Frame Work Light Circuit
Ec17
Short or open detected to Remote Controller Circuit
Ec19
Short or open detected to Transit Valve Circuit
Ec25
Short or open detected to Remote Controller Light Circuit
Ec26
Short or open detected to PS1 circuit (PS1 out of range, high/low volts)
Ec27
Short or open detected to PS2 circuit (PS2 out of range, high/low volts)
NOTE
For each error code, an open or short in the ground circuit will generate the same code.
The PS1 and PS2 sensors operate within a voltage range and if either too high or too
low a voltage is detected, an out of range code will show.
The proximity switches are not part of the built in test circuits, and will not trigger an
error code.
With an Ec01 error code, check continuity of the wire harness between the cab digital
control box and the LHS digital controller. If all wires check good, replace the cab
digital control box.
All other codes require all of the wires, switches, solenoids and other components from
the digital controller to be checked for continuity or shorts to ground.
The LHS digital controller or the cab digital control box are not repairable.
