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Farmer 400
Fav 700
Fav 900
Electrics / General system
A012 - ECU, cold-start aid
E
Testing
Fav 900 chassis number 23/3001 and up
09.08.2001
9000
000147
E
a
7/12
Capitel
Docu-No.
Index
Date
Version
Page
A012 - ECU, cold-start aid
Afterburn time
Afterburning with the engine running ensures better fuel combustion and faster warming of the engine
to an ideal operating temperature.
The afterburn time depends on the resistance of the temperature sensor in the A012 - ECU when
preheating starts.
Text-module
Clocking heater plug output
While afterburning is taking place, the output at the R001 - heater plug is limited by clocking (voltage
ON - voltage OFF - voltage ON - etc.) pins P,N (A012 - ECU).
If the voltage at pin G (A012 - ECU ) rises above approx. 11.5 VDC during afterburning, the outputs for
the R001 - heater plug are clocked such that an effective voltage of approx. 11.5 VDC is applied at the
outputs.
Text-module
Sensor temperature
Afterburn time
[
°
C]
[sec]
Tol/- 2.5
°
C
Tol/- 1.0 sec
> 2.5
0
2.5
60
- 12.5
80
- 22.5
100
- 32.5
120
< - 32.5
120