Hola, creo que he encontrado un artículo muy interesante sobre como chekear sistema LE-Jetronic (mierda el kadett usa LE3-Jectronic).
Buscar jetronic
http://hrsbstaff.ednet.ns.ca/bvogel/...ont-start1.htm
Os pongo un resumen:
LE-Jetronic female connector:
The following table show the results expected at the female connector
and NOT at the computer pins.
NEVER use your meter on the computer pins! |
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 |
0Ω |
7 |
Info on air flow meter |
between pin#7 and pin #5 |
Ω |
See below for data collected on 5 units |
7 |
Info on air flow meter |
between pin#7 and pin #8 |
Ω |
8 |
Info on air temperature |
between pin#8 and pin#9 |
Ω |
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 |
0Ω |
|
This is the EFI connector where the test has to be done |
 |
 |
Air flow 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 |
|
Air temperature sensor test
(in the mouth of the Airflow meter)
Values obtained between pin #8 and #9 of the airflow meter.
Under 30 degrees Celsius, the value of the resistance is decreasing by only 1 to 2Ω per degree.
A corroded connection will greatly affect these values.