OBD-I LED Code Reader
Volvo Forum Contributor and all-around DIY uberguru Ben850 fabricated an OBD-I code reader. OBD-I cars are typically model year 1988 to 1995, and have a more crude way to display codes… by displaying a series of light flashes (like Morse code) rather than storing and outputting codes in a more “human readable” fashion that OBD-II does.
OBD-I cars’ diagnostic boxes that display the flashes are small and black, and found in front of the shock tower on the driver’s side (LHD markets).
I made this a couple weeks ago to read the ECC codes from the OBD II port on my ’96 Turbo Wagon.
It is documented in my ongoing thread (at this point) to determine my intermittent ECC failure, but I thought it could be mentioned in the tool section.
I was going to do a simple momentary switch, LED and three lead wires. Not needing it until the next day I was bored and decided to repurpose a garbage item.
How to make an OBD I LED Code Reader.
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Last Updated on January 22, 2021
