40inches
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| posted on 30/3/16 at 01:58 PM |
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Another Denso Alternator question
Got round to wiring the alternator, and found it has different connections to the other Denso Alternators 
Am I right in thinking that I have an ECU controlled Alternator, that C is the ECU control connection, G is ignition and L is dash lamp?
Also if I don't connect the C connection the output will default to 13.5 volts? As it did on the wife's Focus after the ECU wire came
adrift.
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tims31
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| posted on 30/3/16 at 02:44 PM |
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Does this help
 
Description
Build: http://www.martinsfurybuild.co.uk/
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SJ
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| posted on 31/3/16 at 07:59 AM |
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That looks like mine. It is diagram 4 in Tims31 post. It isn't ecu controlled. Mine is from a Kubota digger. From memory I think the connections
are permanent live, switched live and warning light.
The light output is just a signal though and won't light a bulb. I used mine to switch a diode that controls the LED on my Acewell dash.
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ChrisL
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| posted on 13/5/16 at 03:40 PM |
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I thought it is: Lamp; Ignition switched live and an Output for the ECU (to see what the alternator is doing as opposed to controlling it)
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40inches
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| posted on 13/5/16 at 04:32 PM |
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quote:
Originally posted by ChrisL
I thought it is: Lamp; Ignition switched live and an Output for the ECU (to see what the alternator is doing as opposed to controlling it)
My thoughts exactly, I have left the ECU output wire off, will see when I start her up 
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britishtrident
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| posted on 13/5/16 at 05:15 PM |
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It is the signal from the alternator to the ECU to enable the ECU to adjust the idle speed to prevent stalling.
The output is the a square wave the duty cycle of which varies with load, normally about 40 pecent duty cycle at idle with no load, 0 percent at full
electrical load.
Here is a capture I grabbed from a 105 Amp Denso at idle
 
Denso Alt Duty Cycle Idle
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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