p28 with OBD2a built in adaptor analog input

[Kiwi_racer]

I have a p28 s300 with a built in OBD2a adaptor.

Car is currently running and according to the Hondata manual D12 on the OBD1 (EGRL) is used for analog 1.

On the OBD2a D9 is the EGRL channel so I have had a 0.1uF capacitor inserted into C42 on the board.

Have tried wiring up the sensor according to Hondata instructions but am not getting any reading.

Do these ecu's use this channel?

Any help would be appreciated.

I have set the settings in the Smanager, do I need to enable the sensor or should it be getting a signal?

[Spunkster]

http://www.hondata.com/help/smanager/ecuconnectors.htm

The built in adapter harness does not have this circuitry. YOu will have to connect it directly to the ECU circuit board at the correct pin.

[Kiwi_racer]

http://www.hondata.com/help/smanager/ecuconnectors.htm

The built in adapter harness does not have this circuitry. YOu will have to connect it directly to the ECU circuit board at the correct pin.

Thank you very much Spunkster.

So I guess I'll have to trace the circuit back or find the D12 pin location and solder a wire in place is this what you are saying?

[Spunkster]

Correct

[Kiwi_racer]

Correct

Thanks heaps.

Hi from Al Stewart and all the NZ Honda cup guys btw

[Kiwi_racer]

Correct

Spunkster sorry to be a pain but can you tell me which pin I need to solder onto? I realize it is D12 but could you post a picture for me perhaps?

Thanks in advance

[Kiwi_racer]

http://www.hondata.com/help/smanager/ecuconnectors.htm

The built in adapter harness does not have this circuitry. YOu will have to connect it directly to the ECU circuit board at the correct pin.

Thank you very much Spunkster.

So I guess I'll have to trace the circuit back or find the D12 pin location and solder a wire in place is this what you are saying?

Spunkster I just did a continuity test from D9 OBD2a to D12 on the board and I got a signal.
Is there something else missing?

[Spunkster]

If you have continuity then it should work. Make sure you have the the necessary components for D12 to work. http://www.hondata.com/help/smanager/an ... ghtsub=d12

[Kiwi_racer]

If you have continuity then it should work. Make sure you have the the necessary components for D12 to work. http://www.hondata.com/help/smanager/an ... ghtsub=d12

Hiya Spunkster,

all working now

Cheers :)