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Something next to the brake Master cylinder

Tiny
ANONYMOUS
  • MEMBER
  • 1994 CHEVROLET CAPRICE
  • 4.3L
  • V8
  • 2WD
  • AUTOMATIC
  • 150 MILES
Today saw the thing next to the brake master cylinder.
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Wednesday, October 2nd, 2019 AT 10:52 AM

7 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good afternoon,

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

Roy
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Wednesday, October 2nd, 2019 AT 1:08 PM
Tiny
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Check is on.
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Thursday, October 3rd, 2019 AT 1:02 AM
Tiny
ASEMASTER6371
  • MECHANIC
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Please explain? Do not understand.

Roy
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Thursday, October 3rd, 2019 AT 2:03 AM
Tiny
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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.
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Thursday, October 3rd, 2019 AT 2:09 AM
Tiny
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  • MECHANIC
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Do you mean the engine will not start?

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

Roy
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Thursday, October 3rd, 2019 AT 2:11 AM
Tiny
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Yeah, I mean, the self-diagnosis doesn't work.
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Thursday, October 3rd, 2019 AT 3:17 AM
Tiny
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  • MECHANIC
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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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Thursday, October 3rd, 2019 AT 3:29 AM

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