Bendix Commercial Vehicle Systems VORAD VS-400 INSTALLATION NOTES - Manual (Page 22)

General Information
20
Pretest Procedures
Step Procedure
L 1. Vehicle Ignition: Key-OFF.
2 . Measure the J1939 data link resistance across pins 4 and 5 of the FLR harness connector .
(J1939 High to J1939 Low)
a . If the resistance is between 57 and 63 ohms .
i .
Proceed to Step M .
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 .