Insert the test lead of the diagnostic module into socket 7 of module A
Switch on the ignition
Press the test button on the diagnostic unit five times briefly but firmly
If the LED illuminates and stays illuminated, press once and wait for LED
If the LED illuminates, press once again and wait for LED
If the LED illuminates, press two times and wait for LED
Now You should see three series of LED flashes
First - hundreds
Second - tens
Third - ones
If the LED flashes ten times, it means 0
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1975 164 w/174,800mi (Sold) 1995 850T w/91,000mi, 1998 V70R w/129,000mi
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