ecu error code question

[stupid nissan]

My ecu gave me two codes 21 and 25. Code 25 is the idle speed control valve is that the same thing as iacv and if that is the same could that cause a motor not to start. Also how do you reset the red top sr ecu.


thanks much

me

[brokeAs240sx]

I'm guessing it's the same as a ka ecu, from searching:

...
1. turn key to on position (don't start engine)
2: turn screw fully clockwise, after it flashes the 3 times in a row, turn it back fully.
3 you are now in daignostic mode 3 which will list off the codes one at time, if your ecu is like mine, then it has a red and a green led, the red is the tens, the green is the ones so a code 12 (maf sensor) would be 1 red flash and 2 green. if there are no codes stored it will give you a code 55.
4. to keep codes stored, turn car on. or...
5. to erase codes, turn screw fully clockwise again, it will flash four times for mode 4, turn back fully. then turn key to off. entering mode 4 after being in mode 3 will reset codes.

[stupid nissan]

from what i have read and see it isnt the same as ka ecu. i only have one led. but thanks for the info.