Product Troubleshooting - Autel AutoLink AL419 Manual

A small number of 1994 and 1995 model year gasoline vehicles are
OBD II compliant. To verify if a 1994 or 1995 vehicle is OBD II
compliant, check the Vehicle Emissions Control Information (VECI)
Label which is located under the hood or by the radiator of most
vehicles. If the vehicle is OBD II compliant, the label will designate
"OBD II Certified". Additionally, Government regulations mandate
that all OBD II compliant vehicles must have a "common"
sixteen-pin Data Link Connector (DLC).
For your vehicle to be OBD II compliant it must have a 16-pin DLC
(Data Link Connector) under the dash and the Vehicle Emission
Control Information Label must state that the vehicle is OBD II
compliant.

3.11 Product Troubleshooting

This part describes problems that you may encounter while using the
scan tool.
Vehicle Linking Error
A communication error occurs if the scan tool fails to communicate
with the vehicle‟s ECU (Engine Control Unit). You need to do the
following to check up:
 Verify that the ignition is ON.
 Check if the scan tool‟s OBD II connector is securely
connected to the vehicle‟s DLC.
 Verify that the vehicle is OBD2 compliant.
 Turn the ignition off and wait for about 10 seconds. Turn the
ignition back to on and continue the testing.
 Verify the control module is not defective.
Operating Error
If the scan tool freezes, then an exception occurs or the vehicle‟s
ECU (Engine Control Unit) is too slow to respond to requests. You
need to do the following to reset the tool:
 Reset the scan tool.
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