I haven't got a subaru ECU, and so trying to work out how the turbo dizy works;

This one has reluctor sensor and vac adv unit;

the 4 wires:

yellow

blk/white

blk/yellow

blk/red

 

so far I think

yellow - wire to (-) side of coil (ie "points!")

blk/white - 12V Batt

 

I hooked up the dizy to a electric motor; connected the Yellow thru a 100ohm resistor to +12V. I get a 10V square wave signal on the Yellow and a in phase 1Volt square wave on blk/red;

 

I suppose blk/yellow and blk/red go to a knock control, but does anyone have any insight as to how the knock control does its job? what signaling it does?

what signal should be on that blk/yellow?

I don't have a knock control unit to test it myself.

 

mighty thanks to anyone who has this sort of teci info on this dizy

If I'm reading my diagram right,

 

Yellow ==> coil -

Blk/wht==> coil +

blk/red==> Knock control unit

Blk/yel==> knock control unit

I suppose blk/yellow and blk/red go to a knock control, but does anyone have any insight as to how the knock control does its job? what signaling it does?

what signal should be on that blk/yellow?

I don't have a knock control unit to test it myself.

 

mighty thanks to anyone who has this sort of teci info on this dizy

 

 

BY is the phase control signal.

BR is the ignition timing signal.Both connect to the KCU.

Under normal running KCU, provides 3.1V on BY for nominal timing.

Under detonation,KCU increases BY voltage in steps up to 5.8V to provide up to 10 degrees of ignition retard as long as RPM is less than 4850.No retard function above 4850 RPM.

 

When the KCU gets a high altitude signal,it will advance timing 5 degrees(by decreasing BY to 1.7 volts I think).

wow what a forum this is, that was my first post and I get an answer to this

sort of question!!

many thanks naru, thats just what i needed to know

If it has a Varible Reluctor it is not a turbo disty, turbos had optical disty's so the computer could 'see' where the crankshaft is in its rotation.

 

 

Matt

If it has a Varible Reluctor it is not a turbo disty, turbos had optical disty's so the computer could 'see' where the crankshaft is in its rotation.

 

 

Matt

 

That's only on later turbos with the hotwire MAF.

Okie dokie didnt know on the eariler ones.

 

 

Matt