BR16F84-1.07 ETC, BR16F84-1.07 Datasheet - Page 10

• Manufacturer Part Number: BR16F84-1.07
• Description: OBD II Interface Chip
• Manufacturer: ETC

CIRCUIT NOTES FOR THOSE BUILDING THEIR OWN INTERFACE :
The schematic is shown with simple pads for signals to the vehicle
and the personal computer. Below is information to wire the connector
to the vehicle and also the connector to the PC serial port.
--------------- VEHICLE 16 PIN CONNECTOR -----------
Diagramatically, the diagnostic connector looks like this:
REAR view of male plug from interface device (where pins are inserted)
_____________________________________
\ | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | /
Here is how to hook them up to the interface circuit.
Note that only a few of the pins are used and listed here.
If you are wiring a male connector, remember:
The above diagram referrs to the REAR of the Male connector,
and be sure to wire the male connector properly:
INTERFACE SIGNAL
12 Volts (vehicle battery)
Signal ground
Bus + (for VPW & PWM)
Bus - (for Pwm only)
L line (for ISO 9141)
K line (for ISO 9141)
All other pins are not used.
This cable should be no longer than 3 to 4 ft. A sheild is not needed,
so if present, leave it unconnected to reduce capacitance.
--------------- SERIAL CONNECTOR ------------------
The only other connector to wire is the standard 9 Pin Female D connector
which plugs into your PC. Only 3 pins need be wired.
REAR view of Female 9 pin D connector.
(where the pins are inserted or the wires are soldered).
__________________________
\ | 1 | 2 | 3 | 4 | 5 | /
Here is how to hook them up to the interface circuit.
Note that only a few of the pins are used and listed here.
Remember that the diagram refers to the REAR of the female D connector,
and be sure to wire the connector properly:
INTERFACE
SIGNAL
Out
In
Gnd
(Use a fixed width font to view this diagram)
\| 9 |l0 |11 |12 |13 |14 |15 |16 |/
\
(This is also the Front view of Female Connector in the vehicle)
\-------------------------------/
\-------------------/
| 6 | 7 | 8 | 9 |
PC SIGNAL
Rx Data
Tx Data
Ground
Name
/
D CONNECTOR
CONNECTOR PIN #
PIN #
16
10
15
2
3
5
5
2
7