BMW K100 LT Bedienungsanleitung Seite 25

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LE-Jetronic (EFI) test:
Pin #
Function
Testing mode
type
expected value
1
info on engine rpm
When starter is running
Volts ~
10 to 20mv
2
Idle switch (idle)
Ignition ON, FI relay ON, throttle OFF
Volts --
12v
3
Idle switch (full throttle)
Ignition ON, FI relay ON, throttle full
Volts --
12v
4
starter running
Starter switch depressed
Volts --
12v
5
Ground air flow meter
Ω
7
Info on air flow meter
between pin#7 and pin #5
Ω
See next table
7
Info on air flow meter
between pin#7 and pin #8
Ω
See next table
8
Info on air temperature
between pin#8 and pin#9
Ω
See next table
9
Power (+) to computer, air
flow meter and injectors
When starter is running
Volts --
12
10
Water temperature
Between pin #10 and ground
Ω
2.5KΩ @20 ̊C
300Ω @ 80 ̊C
12
Ground to injectors
Between pin #12 and pin #9
Ω
1 injector 16Ω
Ω
2 injectors 8Ω
Ω
3 injectors 5.33Ω
Ω
4 injectors 4Ω
13
Ground
Between ground of battery and pin 13
Ω
Testing the airflow meter:
Test can be done directly at the airflow meter. (Pin # 5-7-8-9)
If you are checking the airflow meter at the injection computer plug, it must be done with the fuel tank
electrics unplugged. Otherwise pin 9 is earthed via the fuel pump and all the readings between pins 5-
7-8-9 are wrong.
The airflow meter can be tested by applying 12v between pins 5 and 8 and measuring the voltage across
pin 5 and 7 while moving the vane. The reading moves smoothly between about 2v and 12v.
The following resistance value reflects test from 3 people on 5 different units.
Pin 7-5
Pin 7-8
Pin 8-5
Pin 8-9
Status
Vane
closed(value
changes
with vane
position)
Vane
closed(value
changes
with vane
position)
Constant
(not
affected
by vane
position)
air
temperature
152
403
361
207
Have problem starting the bike with this unit
82
334
363
207
OK
93
358
360
202
OK
76.6
334
360
205
OK
66
161
33
132
Bike doesn't start
Seitenansicht 24
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