uncle K wrote in news:997d6b44-1da9-4582-8ea0- snipped-for-privacy@r8g2000vbj.googlegroups.com:
'90 Accord LX coupe, 4-banger, auto trans. This car only has 101K on
> it and is in remarkable condition, always carefully maintained,
> extremely reliable. Suddenly, the S light in the instrument cluster
> is flashing. Reading the manual, the number and length of flashes
> should indicate the problem code. However, it flashes repeatedly, for
> as long as the ignition is on.
You need to jump the two pins in the Service Check connector, THEN turn the ignition on and count the flashes.
The Service Check connector is a loose plug (gray, I think) above the passenger kick panel (the plastic trim under the dash, just ahead of the door).