Pretest procedures – Bendix Commercial Vehicle Systems VORAD VS-400 INSTALLATION NOTES User Manual
Page 17
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15
Pretest Procedures
Step
Procedure
G
1. Vehicle Ignition: Key-OFF.
2 . Measure the resistance across pins 7 and 5 (J1939 High to Ground .)
3 . Measure the resistance across pins 6 and 5 (J1939 Low to Ground .)
a.
If both resistances are greater than 100K ohms or open (Infinite Resistance).
i .
Proceed to Step H .
b.
If either resistance is between 0 to 100K ohms.
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 .
V
COM
A
Pin #
Description
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