3s light is flashing - 1988 Honda Prelude

no car or truck told
makers name, model, year, and engine name,
and if super savvy , the country.
sorry cars are not all the same ever.
some cars sold with 20 + engines, (land cruiser)
amazing no?
the vin on the car can be decoded, try that. online.
then tell what you own.
3s-fe is toyota. and is Fuel injected EFI of some kind ,vast
wiki says
1987 to 2000 only
Celica GT (US), Celica ZR (Japan, ST162)????

and states this (FSE is not the same so ....)to 2003.
The Toyota 3S-FE is a 16-valve 2.0 L twin camshaft, single cam gear engine built by Toyota from 1986 to 2000. European version produces 128 PS (94 kW; 126 hp) at 5,600 rpm and 179 Nm (132 ft-lb) at 4,400 rpm without a catalytic converter; with, maximum power is 121 PS (89 kW; 119 hp).[11] It is commonly used in the Camry 1987-1992 model, the Celica T160/T180/T200, Carina 1987-1992, Carina 1988-2001, Caldina 1992-2002, Carina ED 1985-1998 and Carina E 1993-1998 models, Corona T170/T190 as well as Avensis 1997-2000 models and RAV4, 1994-2000, Picnic/Ipsum 1996-2002 and Comfort 2001-2007. The 3S-FE was also used in some MR2 Mk2 cars due to its torque band being suitable for the automatic models. The 3S-FE is fitted with EFI. The 3S-FE engine is fitted with a cast iron crankshaft, whereas the 3S-GE/GELU engines have forged crankshafts.[10]

O/d flashing indicates a problem in the transmission. It's like a check engine light for the transmission. Count the pattern and Google it. Some will flash just to say help, some will have a pattern. If it has no pattern take to a kragen/oriley pepboys type or a shop to get a scan.

check to see if there is a separate ect for the trans,scanner would be best if able to find a obd2 scan tool

The flashing lights are indicating that there ia problem setting up the airbags at time of iginiton. The problem could be a simple sensor switch in the passender or drive's seat or wiring connection to the seneor or computer or it could actually be the airbag not being detected by the computer. Usually these problem come up in areas where there is high ambient air humidity. suggest a visit to dealersip for a diagnosis of the problem.

3s, humm...... what is that, google shows ZERO for that.
can i know what object shows that? dash, ECU, trans shift.? what?
where are your eyes looking,?
is this the ECU flash code>? LED? at ECU?

"1985-91 Prelude models, there is only one LED display."
ECU code 3 is bad MAP (or bad vacuum to it)

Carb engine or EFI engine./ and which engine?> "options"

here is the FSM , look it up , gen 2 to 5
http://hondatech.info/downloads/Auto/Manuals/Prelude/

Greetings

"Best deal with your choice".Please visit the site

3.0 Liter V6 engine use Dayco 95257
2.2 Liter 4 cyc engine use Dayco 95199

======== 94167 is an old Deyco Euro part #
It will fit the following
Toyota Camry 2.0 i 1996 3S-FE Petrol 10/86-06/91

Toyota Camry 2.0 i 16V 1998 3S-FE Petrol 10/86-06/91

Toyota Camry 2.2 i 16V 2164 5S-FE Petrol 06/91-07/01

Toyota Carina E 2.0 i 16V 1998 3S-FE Petrol 02/92-10/97

Toyota Carina E 2.0 i 16V 1998 3S-FE Petrol 02/92-10/97

I am having the same problem at present, try reading this.http://www.fixya.com/cars/t4544375-1999_toyota_altezza_tiptronic_3s_ge

I can give you all you need, but I need your engine type....2S-E, 3S-GE, 3S-GTE, 3S-FE, 5S-FE?

There is no problem with your computer box, it says 3S-GT on it, thats the way toyota did them back then. same with the 3S-FE (says 3S-F on the comp. box) and 3S-GE (3S-G on comp. box.) i dont recommend removin the cat. you will get defected (or waht is equivelant to a defect where you are) due to smog and stuff like that. Turbo timer is wired to the igntion system, no problems there. and as for gauges: get a pro to install them, but there should be zero trouble.