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The ECU on 1988-1991 Honda CRX cars is located under the carpet at the passenger's feet. Four bolts hold a metal panel covering the ECU.
under the passenger side floor mat
under the coin holder next to the ecu chips
Well the 1987 Honda crx si ECU is interchangable with the 1987 Integra ECU, plugs rite up
Yes the ecu will work. First disconnect the battery and connect the new one then reconnect the batter. Start up the 240sx and it should work it not it needs to be diagnoste goggle 1990 240sx ECU CODES FOLLOW THE STEPS AND THAT SHOULD WORK I know cause I'm using a 1992 ECU FROM Nissan Stanza. I was told it's alittle advanced on the horse power side and idle moves quicker.
On a '90 CRX there is no OBD port because it does not have an OBD. If the check engine light comes on, pull back the carpet on the passanger side and look into the glass port on the ECU to see the flashes that the ECU puts out. Long flashes are tens and short flashes are ones....example.....2 long flashes and 2 short flashes would mean code 22.......and so forth....
There is no ECU reset button.
An ecu for this car would cost about $120
no because it doesnt have the right proportions and air intakes. The ECU is located on the passenger side under the carpet. Don't waste time looking for a OBD plug, that year uses a sequence of flashing lights that can be observed through a "port" window that is in the center of the ECU.
ecu is in the centre console behind the stereo
if your talkin about the ecu(engine control unit) any 1990 dsm (talon, eclipse or laser) non turbo ecu will fit the 1991-94will fit after mods to the 6 pin an 14 pin an coil pack wire switched
because your ecu sends more fuel to warm up the engine faster