Sealey VS8801 Manual page 26

Code reader doesn't power up
If the code reader won‟t power up or operates incorrectly in any other
way, you need to do the following to check up:
 Check if the code reader‟s EOBD connector is securely connected
to the vehicle‟s DLC;
 Check if the DLC pins are bent or broken. Clean the DLC pins if
necessary.
 Check vehicle battery to make sure it is still good with at least 8.0
volts.
LED lamps not working
If you turn on the code reader and perform the I/M Readiness test but
the LED lamps are not working, there may be several possible causes,
including bad connection and ignition off. In this case, follow these
steps to check the code reader.

Make sure the EOBD cable is connected to the DLC securely.

Verify the ignition key is in the KOER position.

Run the LED Test in the System Setup menu. (see 3.7 System
Setup). If the code reader did not pass this test, there is a problem
with the LED lamp. Please contact Sealey or your local distributor.
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