P28 ECU to OBD2B
11-29-2011, 11:39 AM
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P28 ECU to OBD2B
2000 Acura Integra Type R
Is it any different then any other OBD2B car? I am trying to figure out why my car is running stupid rich this winter. I know my wideband is supposed to go into D10 ELD on the OBD1 ECU. So last night I decided to double check it. I pull up AllDataPro and look at my ECU wiring. It says Pin A30 is a Grn/Red wire going to the ELD. I look at the way my car is wired and it is going into A27 Grn/Red. EUREKA! Quick fix it was wired in wrong.....Not so lucky. Pin A30 is a Blu/Red wire?!?! WTF?!?!?! So then I open the OBD1 ECU (P28) and the board is clearly marked A, B, D and outer edge pin numbers. I ohm Pin D10 to C8 on the OBD2B engine harness. Check my wiring diagram and it says CKFP..... The original car has a P73-A04 ECU. Does anyone have any ideas or ran into anything like this before? I hooked the A30 Blu/Red wire up and it read 4.93v all the time. No change on or off throttle. So I put everything back to how it was for now. At least the A/F was changing on A27. I doubt it is right but at least it appears to be a sine wave.
Found a picture showing the same thing as my car. The bottom left is A32 (empty hole), A31 is Grn/xxx and A30 is Blu/Red.
Is it any different then any other OBD2B car? I am trying to figure out why my car is running stupid rich this winter. I know my wideband is supposed to go into D10 ELD on the OBD1 ECU. So last night I decided to double check it. I pull up AllDataPro and look at my ECU wiring. It says Pin A30 is a Grn/Red wire going to the ELD. I look at the way my car is wired and it is going into A27 Grn/Red. EUREKA! Quick fix it was wired in wrong.....Not so lucky. Pin A30 is a Blu/Red wire?!?! WTF?!?!?! So then I open the OBD1 ECU (P28) and the board is clearly marked A, B, D and outer edge pin numbers. I ohm Pin D10 to C8 on the OBD2B engine harness. Check my wiring diagram and it says CKFP..... The original car has a P73-A04 ECU. Does anyone have any ideas or ran into anything like this before? I hooked the A30 Blu/Red wire up and it read 4.93v all the time. No change on or off throttle. So I put everything back to how it was for now. At least the A/F was changing on A27. I doubt it is right but at least it appears to be a sine wave.
Found a picture showing the same thing as my car. The bottom left is A32 (empty hole), A31 is Grn/xxx and A30 is Blu/Red.
11-29-2011, 05:28 PM
#2
Honda-Tech Member
Re: P28 ECU to OBD2B
A plug
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