FIELD MAINTENANCE TROUBLESHOOTING INSTRUCTIONS - Continued
The Field Troubleshooting Symptom Index (WP 0013) lists common malfunctions which may occur and refers you
to the proper page for a troubleshooting procedure.
If you are unsure of the location or operation of an item mentioned in troubleshooting, refer to Location and
Description of Major Components (WP 0002) or Description and Use of Operator Controls (WP 0004).
Before performing troubleshooting, read and follow all safety instructions found in the Warning Summary at the
front of this manual.
The Field Troubleshooting Symptom Index (WP 0013) cannot list all malfunctions that may occur, nor all tests or
inspections and corrective actions. If a malfunction is not listed, or is not corrected by the listed corrective actions,
notify your supervisor.
When troubleshooting a malfunction:
Locate the symptom or symptoms in (WP 0013) that best describe the malfunction.
Turn to the troubleshooting procedure work package where the malfunction in question is described.
Perform each step in the order listed until the malfunction is corrected. DO NOT perform any maintenance
task unless the troubleshooting procedure tells you to do so.
Read each step before performing the troubleshooting procedure. Most troubleshooting procedures
require isolation and testing of multiple components. To achieve this, the troubleshooting fault procedure
is broken down as follows:
Symptom. Is a descriptive statement of the symptom (e.g., UP Button Inoperative). Each symptom is
followed by all possible malfunctions.
Malfunction. Each malfunction will be a descriptive statement identifying the malfunction (e.g., Hydraulic
Oil Level Low). There may be numerous malfunctions for each symptom. Each malfunction is followed by
a corrective action.
Corrective Action. A corrective action may include steps and sub-steps in order to perform the procedure.
If the corrective action does not identify a fault, proceed to the next malfunction until all malfunctions have
To view error codes from E-CHU system, remove cover from Space 4000 ST box and start vehicle.
Two numbers may alternately flash when errors are present. The first number indicates the quantity of errors
detected, and the second number is the lowest numeric code detected. After one minute, the quantity of errors
may decrease by one, as error 24 (Real Time Lost) will drop off the current error listing. Error code 24 indicates
that temporary settings were lost while the battery disconnect switch was off, and is consistent with normal
Each sensor contains Light-Emitting Diodes (LEDs) that will illuminate when metal sensor plate is detected. Use
these LEDs when adjusting and diagnosing sensors.
Middle frame and hook arm sensors are utilized by the system to control unload and load angles. Use manual
mode operation when fault is present in these sensors.
Twistlock and transport lock sensors are utilized by the system to confirm twistlocks are in stowed position while
attempting to load or unload a container. System will not operate if twistlocks and transport locks are not properly
15 amp fuse is located behind cover by relay box. 10 amp fuse is located behind cover of Space 4000 ST box.
Stowage angle sensor is utilized by system to control stowage guide angle during retrieve and stowing