3. Diagnostics Applications
12
b. Non-OBD II Vehicle Cable
Connection
There can be three possible conditions for
Non-OBD II Vehicle Cable Connection:
1) DLC connection supplies both
communication and power;
2) DLC connection supplies communication,
and power is to be supplied via cigarette
lighter connection;
3) DLC connection supplies communication,
and power is to be supplied through cable
connection to vehicle battery.
This type of connection generally requires the
vehicle-specific OBD I adapter and the 15-pin
main cable. To connect the DB15 main cable or
another similar cable, please follow these steps:
1. Locate the required OBD I adapter and
connect the adapter’s 15-pin adapter to the
cable’s 15-pin male adapter.
Figure 3.4: OBD I Adapter Connection
to the DB15 Main Cable
2. Connect the cable’s 15-pin female adapter to
the DB15 port on the top of the scan tool.
Finger tighten the connecting screws.
Figure 3.5: Main Cable Connection
to the Scan Tool
3. Connect the main cable’s OBD I adapter into
the vehicle’s DLC.
Figure 3.6: Main Cable Connection
to Vehicle DLC
