Ignition wiring question.

[Jim Wright]

On Aug 23, 2007, at 2:25 PM, Wayne wrote:

> Ben Fenner wrote:
>> I'm having trouble figuring out exactly what the resistor shown in  
>> the FSM is for. Here is the picture:
>> Does anyone know what it's use is? Someone thinks it might be used  
>> to detect misfires. My electrical engineer friend is also not  
>> confident as
>
> Where's Calum when you need him?!  It sorta looks like it puts a  
> bias voltage onto the coil or driver transistor.  No idea why or  
> what that would do;  any idea what pin#3 on the ECU is?  Oh  
> well.... I flunked out of EE 22 years ago anyway, so I'll just shut  
> up.

Since the resistor goes to the output of the power transistor, I  
wonder if it's there to bleed off excess voltage, if pin 3 on the  
ECCS gets shunted to ground?