Wednesday, July 20, 2011

Chart of Inputs and Outputs

Engines at room 108 :)

Coolant Temperature (THW or ECT)
DC volts

Cold engine

3.415v
Warmed-up engine

0.9v
Throttle Position Sensor
DC volts
                              

Closed throttle

0.578v
Open throttle

2.010v
Crank or RPM sensor
AC volts and Hertz


Idle rpm

6.5v  1.001Hz
2500 rpm

7.97v  1.858Hz
MAP sensor
DC volts 


Idle vacuum

0.5v
No vacuum or key on engine off

1.834v
Air Temperature (THA or IAT)
DC volts

Cold engine

3.625v
Warmed-up engine

3v
Throttle Position Switch
(Idle and/or WOT)
DC volts

Closed throttle

None
Open throttle

None
CAM sensor
AC volts & Hertz


Idle rpm

2.0v  0.080Hz
2500 rpm

2.569v   0.154Hz
Fuel Injector
Duty cycle %


Idle

5.9% 5.9%
5.9% 5.9%
Acceleration

7.2% 7.2%
7.4% 7.2%
Idle Air Control
Duty cycle %



Idle

35%
Cranking or 2500

45%

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