Quote:
"1) Detect teh HOM mode by monitoring the red led - when the WI sees the "low" signal from wire terminal #C14, it can switch on the water injection - may be some interfacing circuitry, but put that aside for the time being. "
Answer:
If I understand this correctly and the low signal is what makes the red LED blink the WI would be injected when the red light blinks. When the red light blinks, the the PCM has diababled HOM, too late for WI at this point. I think that when the DDS3 first sees a signal going from the HOM switch to the PCM it's time to turn on the WI is better.
Quote:
2) If knock presists after depression of gas paddle after WI is mapped, the HOM mode will drop out and so does the WI - until bigger jet is used or a new map is created.
Answer:
I see no reason to stop water injection if if PCM sees knock. The PCM will bypass HOM if it sees knock, but WI can still run. IMO the DDS3 uses info to control WI components. The PCM uses info to control fuel, AND disable HOM if knock threshold is exceded (I have just way over simplified what the PCM actually does but please except this for the sake of reading this). I was just thinking about using the DDS3 to activate the HOM switch, it will have no control over it other then turning it on, after this DDS3 is done with HOM. The PCM still controls whether it will stay activated based on knock values.
Above should also answer #3 in same post
Quote:
I have one more question, looking at the wiring diagram, can the wire such as the c14 accessable from the back of the panel?
Answer:
yes
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