Question about 1997 Geo Metro
Hello, I have a 1997 GEO Metro and doing a lot of work on it. The problem is that the Engine light is on and I cannot get the Code's to see what is the problem. 1st it needed a new muffer and the exhaust manifold had 6 cracks because the car sounded like a lawn mower when driving. For a long story short the engine light didn't go out and then the mech hooked the car up to a diagnostic computer to get the code's and the computer could not communitate with the car, even my neigbor used a hand OBD-II diag computer and there was no power at all to get a reading or a code. I used a fuse tester to see if any power in the diag connector and there was no power. The fuses are all ok but I cannot check the relay switches to see if they are good. The car runs a lot better now since the muffer and manifold problem. please help me. I am very close to resolving the engine light problem, just need to get some power at the diag connector to get a code. thx u.
Check the fuse for the cigarette lighter. it is the same circuit as the diag. port power.
replace fuse if failed and check codes.
Posted on May 31, 2009
Yes! Thank you for this thread! I had just assumed that the port was powered through the PCM and thus tossing the solution out of my reach. Sure enough, the lighter fuse was blown. From pin 16 on the OBD connecter, I was able to read 20 kohms of continuity to ground when the fuse was blown which still confuses me a little bit, but I guess who cares now. Incidentally, that was part of the reason I believed that the power came from the PCM... I thought I was reading resistance through some failed power circuit in the PCM. BTW, I'm working on a 2003 Saturn Ion.
Posted on Jan 16, 2010
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Posted on Jan 02, 2017
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