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 bac 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.
√ Turn the ignition off and wait for about 10 seconds. Turn the
ignition bac to on and continue the testing.
• Scan tool doesn’t power up
If the scan tool won't power up or operates incorrectly in any other
way, you need to do the following to check up:
√ Check if the scan tool's OBD II connector is securely connected
to the vehicle's DLC;
√ Check if the DLC pins are bent or broken. Clean the DLC pins if
necessary.
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