Ignition wiring question.
Jim Wright
wrightj at apple.com
Thu Aug 23 15:33:59 CDT 2007
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?
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