W203 obd pinout?

[j4gg4]

Does anyone know if on a w203 if any pin on the OBD plug is ignition? and if so where does it come from? engine ECU?

On mercedes is the ignition pin usually pin 8?

Thanks

 

[television]

Are you looking for a ignition switched live that you can tap into.

 

[j4gg4]

Are you looking for a ignition switched live that you can tap into.

Something like that, only without the car.

Basically i want to set up a bench ECU to test it with star. So i only have the engine ECU not the car itself. I've not actually tested it yet but from the ECU i've figured out:

Pin 24 - 12v
Pin 1 - 12v
Pin 2 - 12v
Pin 4- ground
Pin 28 - K-line

I have a feeling that when i test it on star that it won't detect Ignition? Unless one of the 12v pins is ignition?. And i presume mercedes uses pin8 for ignition?

 

[LostKiwi]

Does this help?

 

[television]

I did not think that the 203 uses a 38 pin.

 

[LostKiwi]

Ah - I saw he mentioned pin 28 so thought it would be the 38 pin. The standard OBD is only 16 after all.
Thinking about it that one may be a bit old.

 

[television]

Ah - I saw he mentioned pin 28 so thought it would be the 38 pin. The standard OBD is only 16 after all.
Thinking about it that one may be a bit old.

I know and I saw that too

 

[LostKiwi]

Here's the 16 pin layout:
http://pinoutsguide.com/CarElectronics/mercedes_obd2_diag_pinout.shtml

 

[j4gg4]

Ah - I saw he mentioned pin 28 so thought it would be the 38 pin. The standard OBD is only 16 after all.
Thinking about it that one may be a bit old.

Sorry pin28 i refer to the pin on the ECU in question.

Attached

 

[j4gg4]

Here's the 16 pin layout:
http://pinoutsguide.com/CarElectronics/mercedes_obd2_diag_pinout.shtml

That's great, but any idea which pin from the ECU is ignition?

 

[j4gg4]

Or maybe i could bridge pin 16+8 on the OBD plug to mimic ignition ON?

 

[j4gg4]

Sorted