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Electrical Requirements
J-1939/15 (lite) Data Link Specifications
Maximum 40 meter Length.
Maximum 3 meter stub length.
Maximum 10 modules on segment.
Twisted pair (18 or 20 AWG) with 1 twist per inch.
120 Ohm terminating resistors must be used.
Connector at ECU is not defined.
The third pin for shield is not used in ‘in-line’ and T-connectors.
Recommended
Cable
Manufacturer
Cable
Part
Number
Round
J-1939 (+)
(PIN "A")
Color
J-1939 (-)
(PIN "B")
Color
Champlain
J1939/15
Yes
Yellow
Green
Twisted Pair
J1939 (+)
J1939 (-)
J1939 (-)
ECU #1
ECU #2
Terminating
Resistor
120 ohms
Terminating
Resistor
120 ohms
J1939 (+)