User Guide

BDS Diagnostics
29-3
29.3. Load Module (BDS)
String View > Diagnostics|Load Module
The Load Module diagnostic tests each load connection to the battery. This diagnostic tests
the connections, load cable fuses, load relays and load module, and can confirm actual load
current. Depending how the system is set up, only the load module for the selected DCM is
enabled. Typically, all ten load steps are used and are distributed across multiple DCM units.
The Load Module also has a diagnostic that can confirm the direction of the current
transducer.
To test each load connection, open Load Module Diagnostics, select Load Module, then click
the Test Current tab on the dialog box. Select the DCM for the desired load module. You can
turn on each load step and confirm the current for that step.
IMPORTANT NOTE: If the screen displays only Load Module buttons 1 to 5, this indicates
the DIP switch in the DCM is set so the internal load bank is selected. This is an incorrect
state on newer DCM units. On older multiboard DCM units, this condition is normal if the
unit actually has an internal load bank. Confirm the setting before proceeding. View the
Diagnostics DIP screen. If Bank 2, Bit 1 Status is ON, this is incorrect for newer hardware.
The ON status is valid only for older hardware with internal load banks.
WARNING: When testing, do not leave the load module on for a long time. The load
module can overheat and damage hardware if not allowed to cool between tests. The load
module automatically turns off after about 10 seconds.
Figure 142. Diagnostics - Load Module - Test Current (BDS)
Under Select Load Module, select a load module, then click Load On. To stop the test,
click Load Off. Click the arrows to select other DCM units.