31
P3 Pin #
Where to
Description
OBD-II Connector
[using AVT OBD-II cable]
1
JP1 pin 16
2
JP1 pin 2
JP1 pin 4
J1850 bus +
3
JP1 pin 18
4
ground plane
Ground
Ground
5
ground plane
Ground
Ground
6
JP1 pin 12
7
JP1 pin 8
K-line
8
JP1 pin 20
9
JP1 pin 19
10
JP1 pin 6
J1850 bus -
11
JP1 pin 21
12
JP1 pin 22
13
power input
protection circuit
+V-battery
+V-battery
14
JP1 pin 14
15
JP1 pin 10
L-line
Table 6 Connector P3 (revisions “AA” and later)
6.3.7 Connector P4
Connector P4 on the AVT-718 is a DE-9S connector and will mate to any industry standard
DE-9P connector. Through this connection the control computer communicates with the
AVT-718 Multiple Interface. Hardware handshaking (RTS/CTS) is required for proper operation
of the AVT-718.
When the AVT-718 board is installed in the enclosure, P4 is labeled: “HOST COMPUTER.”
All signals and directions indicated are relative to the AVT-718 interface.
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