A04 & A03 ECU differences?

[HondaFan81]

have two ECUs with the same prefix, then in middle have PT3 and at end have A03 and A04 respectively. Both are from 90-93 Accords.

XXXXX-PT3-A03

XXXXX-PT3-A04

what are the differences between the two?

[HondaFan81]

anyone?

[HondaFan81]

Well to answer my own question... information obtained from friend at Honda Dealer.

To restate my situation. I have a friend that has possibly bad ECU in his 91 LX 5-speed. I have a spare ECU from what I thought was a 91 LX 5 speed. However, I stand corrected becuase it was from a 92 LX coupe 5-speed. Now the manufactured date stamped on it makes sense!

His ECU (91 LX 5-speed) - Dated 1990 37820-PT3- A03 is indeed from a 91 LX 5 speed.

My ECU (92 LX 5-speed) - Dated 1992 37820-PT3-A04 is from a 92-93 DX/LX 5-speed.

FYI: DX and LX are same engine/trans combo. Only interior luxury differences.

[accordztech]

hehe i thought it was auto and manual.

hehe out of all the things i know about cars, ecu is another story haha

[HondaFan81]

Originally posted by accordztech
hehe i thought it was auto and manual.

hehe out of all the things i know about cars, ecu is another story haha

Just FYI, I made corrections to the thread above. The differences are not in manual vs automatic..it's in the model year. I made a booboo in thinking my ECU was from 91 LX 5 speed...it's from a 92 LX 5 speed. Big diff eh?

[HenRoc]

GUYS I BOUGHT A PT6...is there a diff? before i install it?

[accordztech]

pt6 is the 1991 se or 92 93 ex se ecu.

i bought that to run my f22a6 manifold. it should work?