does ne one kno the ecu codes for a 93 240sx???

 

same as any other nissan of that era. Here's what I remember off the top of my head:

13 - coolant temp sensor
34 - mafs
11? - knock sensor
55 - all good
10? - O2 sensor

 

is that how many blinks or what? cuz it blinked like 4 long times and stayed solid the rest of the time

 

that would be 40, its long long long long (4) and then 0 short which is the second number so like
L-L-L-L-L S-S-S-S-S is 55 (all clear)

 

I knew my FSM would come in handy often!
Here ya go...

11* - crank angle sensor circuit
12 - air flow meter circuit
13 - engine temperature sensor circuit
14 - vehicle speed sensor circuit
21* - ignition signal circuit
31 - ECU
32 - EGR fuction ------------ california models
33 - exhaust gas sensor circuit
34 - detonation sensor circuit
35 - exhaust gas temperature sensor circuit --------- california models
43 - throttle sensor circuit
45 - injector leak
54 - signal circuit from A/T control unit to ECU (AT only)
55 - No malfuntion in the above circuits

* if 11 and 21 are displayed at the same time, check crank angle sensor first.

 

where is 40?

 

*shrug*
My FSM is for a 91, but should be the same no?

the list I gave is all my book has in it.

 

so if it was four long and a continuious solid it would be what??? lost me....srry......

 

Whoa, I was way off.

If you notice the trend, there are no "zero" digits in ECU codes. How are you reading codes? Here's what I suggest:

I'm assuming that you've found the potentiometer (screw thingy) in the side of the ECU. With the key in the 'off' position, it should be all the way counter clockwise. Turn the key to 'on', turn the potentiometer all the way clockwise, count to 3 and then counter clockwise. The LED next to the potentiometer will blink out the codes.

If this is what you're doing, something funny is going on. Take it to Autozone, and they can read your codes through the consult port.

 

Or it might be a bad ECU lol