06 trx400fa at
I know this may have been covered but I haven't been able to find a solution to this and I'm a mechanic!
It has a fault code 4, One long blink, four short ones after the "N" blinks. No blinks on the 4x4 light. I have a service manual and done all the checks and replaced the ECM, TPS and angle sensor. It still shows the code 4 and will NOT do anything else. I have checked everything and tried many times to do a re-set and initialize to no effect.
I'm at the end of what I can do. Do I just tell my customer to take it back to a Honda dealer? That's embarrassing to me as I have worked on a few of these and was always able to fix them. Anybody have any good ideas?