3B ECU pin 54

[Bernie Benz]

Scott, SJM Auto-Technik identifies ECU pins 38, 39, and 54 as “Coding  
plug”. Must be a ground connection for a coding device to the ECU  
ground. Is it connected within the ECU to 10, 14, and 24?

Bernie


On Feb 27, 2010, at 12:47 PM, Mike Sylvester wrote:

> The Bentley sect. 28.44 states that the 3B ECU pin 54 is ground.
> The wiring diagram page 541 current track 43 shows it going to  
> connector
> T6f pin 3.
> It doesn't appear that this is pin is connected to anything on the  
> other
> half of the connector.
>
> I think T6f is the software coding plug.
>
> I measured this pin on my car, with the ECU connector removed, and  
> it is
> not connected to ground.
>
> Can anyone tell me if it is grounded on your car?
>
> I'm trying to debug some running issues.
>
> 1.)  Occasional hard misfire at very light throttle.
> 2.)  erratic acceleration and low boost.
>
> I've already verified the following sensors and wiring:
>
> MFTS
> intake air temp
> engine speed sensor
> timing reference sensor
> Altitude sensor
> coolant temp sensor
> Ground connections at ECU pins 10,14,24
>
> I ran the ECU output test and everything clicks as it should.
>
> I'm running out of things to check.
>
> Mike
>
> www.urq20v.com
>
>
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