Something next to the brake master cylinder

1994 CHEVROLET CAPRICE
150 MILES • 4.3L • V8 • 2WD • AUTOMATIC
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today saw the thing next to the brake master cylinder.
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Oct 2, 2019 at 10:52 AM
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ASEMASTER6371
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Good afternoon,

Is it attached to anything? Looks like it is just laying there.

Roy
Oct 2, 2019 at 1:08 PM
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Check is on.
Oct 3, 2019 at 1:02 AM
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ASEMASTER6371
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Please explain? Do not understand.

Roy
Oct 3, 2019 at 2:03 AM
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The check burns, self-diagnosis does not work. that is, if you close A and B then the check will not burn at all and the cooler will spin and nothing else happens.
Oct 3, 2019 at 2:09 AM
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ASEMASTER6371
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Do you mean the engine will not start?

Do you mean the ECM will not respond to show codes?

Roy
Oct 3, 2019 at 2:11 AM
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Yeah, I mean, the self-diagnosis doesn't work.
Oct 3, 2019 at 3:17 AM
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ASEMASTER6371
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Okay, sorry.

If you jump the 2 pins and it will not flash codes at the check engine light, that indicates a bad ECM. You will need to replace it.

Roy
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Oct 3, 2019 at 3:29 AM