jim beam wrote:
> anyone know the ecu switching voltage for the ignitor?
>
> i want to test one out of the car. i've read this:
> http://www.gcw.org.uk/rover/ign.zip from graham woods excellent rover
> 200 web page. the only info it doesn't give is what signal voltage
> the ecu gives the ignitor - and that would allow me to rig up a dry
> test. i'm guessing it's 5v as the ecu is old skool electronics, but
> anyone know for sure?
>
> any help much appreciated!

It's me!

Make up the LED test device as described in the zip file and
use that and the text instructions and the f/finding diagram.

Voltage signals are the wrong concept since the devices work
by current like 74 series TTL does. If you uncouple the signal]
wire to measure it on voltage alone, the lack of current may lead
you astray!

If the ECU can 'suck' a milliamp or two through the LED, making
it flash, then things are working.

HTH
--
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