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5. With the pointer at READ PUBLIC BUS, press the Select key. The HDT will dis-
play the following:
6. To see the names of the J1708 data bus gauges the for which the Interface Module
has been programmed, use the Up and Down keys to scroll through the list. The
J1708 data bus gauge names are: TACHOMETER, ENGINE LOAD, ENGINE OIL
PSI, BOOST PRESSURE, ENG/BRAKESAV OIL TP, COOLANT TEMPERA-
TURE, and SPEEDOMETER. Other gauge names that appear are private data bus
gauges.
7. To see the data the Engine ECU is sending to a particular gauge, move the
pointer to that gauge's name and then press the Select key. After a few seconds
the HDT will display the name of the gauge and the value being sent to it:
a.
If the Engine ECU is broadcasting data for the selected gauge, that data
should appear after VALUE within 15 seconds. This data can be com-
pared to the corresponding gauge indication.
b. If data does not appear after 15 seconds, the Engine ECU is not broad-
casting data for the selected gauge. Follow the troubleshooting procedures.
8. To select another gauge, press the Return key to exit this display and return to
the gauge list. You can also press the Return key again to go back to previous
menus to access other functions.
9. When finished, disconnect the HDT.
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