I have a 1991 Mazda B2600i with 185,000. I've looked all over the B-Series forum and if it's here, I apologize that I did not see it . . .
I've seen the posts about codes but, what I need to know is how do you check the ECU without a scanner, if this is possible?
I went to avproecm.com and saw their page on the Mazda engine error codes and their description of how to retrieve them, however, the "single wire that will have a single green connector" does not seem to be located where they say it should be. I'm wondering if it could be located somewhere else, as an anomaly of some sort.
Also, MANY miles back the check engine light came on and stayed for quite sometime. Quite frankly I was broke and was in no postion to see about it. After an extended period, the light went out. The truck has passed emissions tests with flying colors before and since that were required in certain areas of TX where I used to live. Where I live in TX now, none are required. In fact the mechanic doing the check was surprised at how low the emissions were given the age of the truck. The check engine light is not on now. After reading the board, I suspect that this was part of the routine maintenance signal. I have not changed the black and white wire connections under the dash either, not knowing at this point whether or not I need to. Any other ideas? . . . . Of course if it ain't broke, I don't want to fix it. The light does come on with all of the other panel lights when I turn the key to the "on" position and goes out when started. I just want to make sure it ain't broke. Ii is my hope that if the light is not on then all is well . . .
I had two leaky fuel injectors that essentially had my truck as an unlit rolling fire bomb. I wound up replacing all of them. I have recently performed a tune up consisting of plugs, wires, rotor, air filter, and pcv valve. I am about to have the timing checked and replace the oxygen sensor because I know it's been better than 80K miles. Hopefully my mileage will improve.
I would like to check the ECU just to make sure I know how and make sure there are not any unknown code issues. Any other thoughts or suggestions?
I apologize for the length . . . I figured if I didn't state it, you wouldn't know.
THANKS IN ADVANCE!