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Old 12-01-2003, 10:28 AM
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Join Date: Aug 2001
Location: secret
Posts: 3,044
EHA numbers , need a reference

I know this is all in the archives but I got bogged down trying to decipher it. On the M103 with CISE someone please fill in the blanks.

Key On Engine Off;
EHA current = 20 ma
Duty cycle = 70%

Engine running (warm)
EHA = _______
EHA wit O2 unplugged = 0.00 ma
EHA ma under acceleration = ______
EHA ma on deceleration = -62 ma (is this correct?)
Duty cycle = 45-50% w no fixed numbers
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Old 12-01-2003, 10:35 AM
engatwork's Avatar
Join Date: May 2000
Location: Soperton, Ga. USA
Posts: 11,246
Cap'n - I am going to run it over to C. Potts at lunch and get him to resolve it. I am not going to have time for the remainder of the week.

In the CD there is a sheet in there that tells you what the "fault" is at the different duty cycle %'ages. Example is 70% has something to do with the "signal" from the fuel pump relay.
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Old 12-01-2003, 11:09 AM
pesuazo's Avatar
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Join Date: Oct 2002
Location: Near Raleigh, NC
Posts: 580
Engine running (idle) EHA = hovering around 0ma if duty cycle is set at 45 to 55%
If duty cyle set a little rich (hovering at 35 to 45%) EHA current will be hovering around -3.5 to 0 ma.
If duty cycle set a little lean (hovering at 55 to 65%) EHA current will be hovering around 0 to +3.5ma.
I have never tested under acceleration, but I will assume it will be the same as above (do not quote me on this).
No steady duty cycle numbers mean no faults (with engine running)
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