1991 Accord "S" light flicker and speedo malfunction.

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Spoon - 30 Jan 2006 17:16 GMT

I have a 1991 Sccord with 176k miles. The trans computer was replaced
about three years ago. It was replaced because the car "hung" in second
gear and this problem was determined to be the TCU.
Now I have a flashing "S" light occasionally and the spedo fails to
register , some times. The car seems to shift properly.

Any help would be appriciated.

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TeGGeR® - 01 Feb 2006 04:41 GMT

> I have a 1991 Sccord with 176k miles. The trans computer was replaced
> about three years ago. It was replaced because the car "hung" in second
[quoted text clipped - 3 lines]
>
> Any help would be appriciated.

How many times does the light flash?

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TeGGeR®

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J. - 03 Feb 2006 00:24 GMT

>I have a 1991 Sccord with 176k miles. The trans computer was replaced
> about three years ago. It was replaced because the car "hung" in second
[quoted text clipped - 3 lines]
>
> Any help would be appriciated.

Most likely the speed sensor sending unit on the transmission.

My relatives had an almost identical problem last fall with an early-mid
90's Accord. The speedometer was intermittent, the auto tranny "S" would
light AND the cruise control would disengage the moment the speedo dropped
out. The dealer claimed it was the speedometer cluster (circuitboard, etc),
but with a junkyard replacement cluster it did the same exact thing. Using
my Prelude manual and tracing what was common between the speedo and cruise
control, it made sense that the Accord's problem had to be the speed sensor.
They replaced it and it's still fine 4 months later.

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