I have a couple of questions about engine sensors and their relationship to the ecu. To make a long story short me and a friend of mine are putting an OBDII JDM H22 into his 91 accord EX. I have done plenty of b-series swaps but they require little to no pin swapping or wire running and things of that nature. This requires a bit of that. Here are my questions:

1. When you are looking at a sensor how can you tell which pin in the sensor does what ? Most I would assume have a power/ground/signal. But how can you know which is which ?

2. When wires come from the sensor to the ecu, which actually go to the ecu ? For instance in the case of this H22 the MAP sensor has 3 pins in it however the ecu diagrams for P13 that I have seen show a MAP at D17 and an MAP at D21. These pins on the ecu only support 1 wire so where do the other 2 that originally came from the MAP go ?

3. Are all OBDI dash harnesses coded with the same colors for their respective ecu pins ? For example if pin D5 connects to a blue wire in an EG hatch will that same pin connect to a blue wire in a CB7 accord.

Any information would be much appreciated. Didnt know if this would be the correct forum for this question but it is more of a general on sensors and wiring than H22/accord. Thanx for any help.

 

you should get a helms for the car and it tells you what color wires at said sensors do what, voltages everything you need to know. its like a bible for honda sawps.

 

That would be great. Do you know where I can possible get them online. I have heard that they are expensive. I have gone to the spoon site and DL'd some of their manuals but a lot of them are not really that helpful. Thanks