Komatsu 830E-AC Shop Manual page 349

Preliminary
1. Turn the key switch to the OFF position to stop
the engine.
2. Turn the key switch to the ON position, but DO
NOT start the engine.
3. Allow the VHMS controller to start up. This
should take about one minute. Verify the red
LED display starts counting up.
4. Attach the VHMS serial cable to the machine's
VHMS diagnostic port (2, Figure 13-3), and the
other end to the laptop PC's serial port.
FIGURE 13-3. DIAGNOSTIC PORTS
1. IM Diagnostic Port
5. Double-click on the VHMS Technical Analysis
Tool Box icon on the computer's desktop.
6. Enter the appropriate User Name and Pass-
word and click the [OK] button.
D13004
2. VHMS Diagnostic Port
VHMS CHECK-OUT & TROUBLESHOOTING
7. Check for fault codes associated with the inter-
face module.
a. Perform a VHMS download with the VHMS
Technical Analysis Toolbox program. Refer
to VHMS Download for detailed instructions
on performing a download.
b. In the download data, view the fault history
and confirm that there are no fault codes
associated with the interface module. If any
are found, these circuits should be analyzed
to determine the cause of the fault and
repaired.
c. Confirm that there are no fault codes associ-
ated with the communications between PLM
III, engine controller, interface module, drive
system controller or the Orbcomm controller.
If any are found, these circuits should be
analyzed to determine the cause of the fault
and repaired.
Checking Inputs And Outputs From The Interface
Module
1. Attach the VHMS serial cable to the machine's
IM diagnostic port (1, Figure 13-3), and the
other end to the laptop PC's serial port.
2. Start the Interface Module Real Time Data
Monitor program by double-clicking on the
shortcut. The program begins with a blank win-
dow. On the menu bar, there are five items:
Select Serial Port, Start/Stop, Logging, Screen-
shot, and Units.
3. Click on [Select Serial Port] in the menu bar.
Select the correct communication port. It will
usually be Com1.
4. Click on [Start/Stop] in the menu bar and select
Start.
5. The program should display data as shown in
Figures 13-4 and 13-5.
D13-5