My Honda has a problem and I can't find it. Have tested the individual solenoid valves and have replace all of the vacuum lines. The only item I haven't tested is the dashpot which is next on my list. If that tests out ok I'm then looking to test the ECU outputs. My factory service manual says I need an ECU test harness. Can't buy that at my local parts stores.

Anbody know where to find an ECU test harness for an 89 Accord?????

 

LXi, LX, or DX?

 

It's an LX. Near as I can tell from the factory manual the ECU doesn't produce codes, or at least the manual doesn't speak to any way to retrieve codes. It appears the only way to test the ECU is with the test harness. We're relatively certain that the problem is coming out of the Emissions system, just can't seem to nail it down. Any ideas?

P.S. sorry for the delay, I responded yesterday but through my hotmail. doh!

 

The unit is under the drivers seat; but I've not found a diagnostic chart for it.
What problem are you having?
maybe if you can give a good description of the problem someone will have good advice for you.