1990 B21A1 blinking light on dash S1

Third Generation Honda Prelude topics

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johnedouglass
Prelude Enthusiast
Posts: 2
Joined: Fri Feb 17, 2012 10:54 am

1990 B21A1 blinking light on dash S1

Post by johnedouglass »

S1 light blinking and trans slipping 1 to 2 and 2 to 3 - but not at first. Only slips after engine warms.

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spiffyguido
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Joined: Fri Nov 11, 2005 2:55 am
Prelude Model: 1991 SE-SR
Location: Alberta, Canada
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Re: 1990 B21A1 blinking light on dash S1

Post by spiffyguido »

Hi John,

You'll want to start by getting the error code from your A/T control unit. The error code light can be seen through the carpet flap in your passenger side footwell. Download the 1988 service manual from our manuals section and see page 9-12 to get an idea of how to check the code. On page 9-13 there is a description of what each page means. Let us know what you find.

johnedouglass
Prelude Enthusiast
Posts: 2
Joined: Fri Feb 17, 2012 10:54 am

Re: 1990 B21A1 blinking light on dash S1

Post by johnedouglass »

My mistake:

Flashing light is S3 just below the D for Drive and 2 for Second Gear.

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spiffyguido
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Posts: 2196
Joined: Fri Nov 11, 2005 2:55 am
Prelude Model: 1991 SE-SR
Location: Alberta, Canada
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Re: 1990 B21A1 blinking light on dash S1

Post by spiffyguido »

Ok. No problem. You should still be able get a reading off the A/T control unit. Does it give you an error code value?



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