Bendix Commercial Vehicle Systems VORAD VS-400 INSTALLATION NOTES User Manual
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Pretest Procedures
Step
Procedure
F
1. Vehicle Ignition: Key-OFF.
2 . Measure for J1939 data link resistance across pins 7 and 6 of the DIU harness connector .
(J1939 High to J1939 Low)
a .
If the resistance is between 57 and 63 ohms .
i .
Proceed to Step G .
b .
If the resistance is greater than 63 ohms or open (Infinite Resistance .)
i.
Test Failed. Check for missing J1939 data link terminating resistor(s) or open/loose connections in
the vehicle’s J1939 data link harness . (See Note)
c .
If the resistance is less than 57 ohms or near zero .
i .
Test Failed . Check for shorted connections in the vehicle’s J1939 data link harness . Unplug all J1939
data link components from the data link to isolate a potential defective component .
(See Note)
Note: Refer to vehicle OEM repair manual or contact the OEM for more information on the J1939 data link harness .
Pin #
Description
J1-7
J1-6
J1939-