need help

[ble]

hi just bought my new 240sx le and the check engine light stays on so i read a post saying to remove the panel by the passenger side and thers the ecu.i got that far but when i treid to turn the bolt it wont turn so what am i doing wrong!!!!!!!!
 
plz help me thank you

[240sxygrl]

ok....so what have you done so far? what bolt? be specific and maybe I can help.

[wherezmytofu]

try resetting the ecu first...to do that unplug ur battery for atlease 15mins, then put it back on...make suer u hab the code ready if ur radio is one of those coded ones &nbsp;<img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/cool.gif" border="0" valign="absmiddle" alt=':cool:'>

[rampid360]

you could turn your car on and off 100 times...that would solve the check engine light problem &nbsp; <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/tounge.gif" border="0" valign="absmiddle" alt=':p'>

[wherezmytofu]

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (rampid360 @ May 17 2002,10:29)</td></tr><tr><td id="QUOTE">you could turn your car on and off 100 times...that would solve the check engine light problem <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/tounge.gif" border="0" valign="absmiddle" alt=':p'></td></tr></table><span id='postcolor'>
nmo my answer is a real answer that is how ureset a stock ecu......also look if u notice any loose piping...even ina &nbsp;98 sumthing may slip &nbsp;<img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt=':)'>

[SaintlyCharBoy]

to reset the ecu:
1) get at it
2) (with key at on position but not running) turn the little screw thingy on the back all the way clockwise, the slot will point to a line on the unit wat 2 or more seconds (if you don't wait you'll just get different codes)
3) start motor
4) turn screw thingy back
5) drive car with no blinky or shiny lights

the battery thing didn't work on my car, neither did repeatedly turning her on and off

[anthony240]

There are 2 screws that hold the ECU in place, one at the top just underneath the bottom of the dash, and the other is beneath the ECU to the side of the panel. Once these are taken off, take the dash screw off (right above the first ECU screw). Lift the dash a little bit while wiggling the ECU out, it's tricky but it'll get out.

Turn the ECU around and get to the back of it, you will see a knob with a notch in it beside a caution sticker. Follow directions above, but if you want to know what threw the code, follow this:

-Turn ignition to on position (where most of the lights are on, brake, airbag, etc)
-Turn knob fully clockwise, wait two or more seconds, then turn knob fully counter clockwise
-The service engine light will start blinking, count the blinks. The first blinks are slow, this will represent a first digit.
-There will be a short pause, then the light will blink fast, these blinks will represent a second digit.
-For example, light blinks slow 5 times, and blinks fast 5 times, this is code 55
-If there is only one code, the light will just repeat the code over and over. If there are more, the light will also repeat each code one after the other.
-Once you know what the problem is (or if it's just general maintenance) fix it, and clear the code by starting the car.