Ecu Dignostic

[R33A31]

Hi can somebody tell me how to dignostic the r33 s2 ecu.

After turn on the ig. on there is no led on my ecu

[edspaged2]

your exhaust temp light?

[R33A31]

exh. temp. light ON due to I'm not use exh. temp sensor. My exhaust pipe re straight pipi 3" from front to rear muffler.

[edspaged2]

Just did a quick search for you:

http://www.skylinesaustralia.com/forums/in...=ECU+diagnostic

It may be helpful. Make sure your ignition is on, but the car not idling. If your doing it right, then i suppose the exhaust temp light was the only 'flashing' light source?

[R33A31]

After open the ecu cover, I found there is no LED at all.

[edspaged2]

After open the ecu cover, I found there is no LED at all.

uhhh, you shouldnt be opening that. You dont need to. Your exhaust temp light acts as a 'engine check' light too. If your exhaust temp light is on all the time cos you got no exhaust temp sensor, give the turn screw on the ECU a go to see if the exhaust light will flash anyway in correspondence with a possible electrical fault. I still think AFM's. Its almost always the case