I have a 92 accord Ex with AT. It was throwing a bunch of transmission control unit codes and the transmission was in limp mode. I took everyone's advice and replaced the tcu. Original pn was 28100-PX0-731-1M 3EX which I replaced with 28100-PX4-731 from ebay. The car shifts fine now and "seems" to be working. However, I cannot remember what the start up dash board light sequence is supposed to be so I am not sure if My repair was 100 percent successful/compatible. Upon turning key to on I see check engine, srs, and d4 light up solid and then go off after a few seconds. This leaves me with oil, battery, abs, and park light still lit. Once I start car only park light is left illuminated. I guess I never paid close attention. Let me know if this correct or if there is some error code here. FYI-- I jumpered the service connector after resetting tcu and cel light comes on solid that's it. No blinking D4 etc.
Thanks for any help or let me know if more info is needed.

 

Sounds good to me. Each of those systems should do a "bulb" check when the key is first turned to "on/pos II". So they come on and go off....bulbs are good and systems are good to go.

 

thanks..I will keep driving for a few days and see what happens. However, I feel much better now and my car has a new lease on life after 270k.