Vogels Autogas Systems VGI Hardware Manual
System Description and Installation
VGI Technical Manual 2014-01-14.pdf
Pagina 36 van 44
1.14.2 Injection Signal Cutting Installation Instructions:
How to check which cut injector wiring to use
There are different types of cut injector wiring to match with the injection control unit:
SA144 / SA143: Injection cutting wiring with standard connectors (Bosch) 4 Cylinder / 3 Cylinder.
SA144INV / SA143INV : Injection cutting wiring with inverted connectors (Bosch) 4 Cylinder / 3 Cylinder.
SA144J : Injection cutting wiring with standard connectors (Japan) 4 Cylinder / 3 Cylinder.
SA144JINV : Injection cutting wiring with inverted connectors (Japan) 4 Cylinder / 3 Cylinder.
SA144U: Universal Injection cutting wiring. This wiring has no connectors and needs to be soldered to the injection
wires of the car.
Bosch
Japan
Standard: Pin Nr. 1 = Positive – Pin Nr. 2 = Negative (also called “Pulse”)
Inverted: Pin Nr. 2 = Positive – Pin Nr. 1 = Negative (also called “Pulse”)
How to know if a connection is “Standard” or “Inverted”?
To identify which of the two wires is positive, do the following:
- Detach all the connectors from the injectors;
- Set a multimeter to measure DC voltage;
- Connect the negative probe to ground;
- Connect the positive probe to one of the two pins of the injector wiring;
- Turn on the ignition of the car and immediately check the multimeter reading.
If the multimeter reads +12 volts, that pin is the positive.
WARNING: the injector +12 volt on some cars might be timed; therefore the reading might disappear a few
seconds after the ignition is turned on. Check the polarity of all injector wiring connectors to make sure that they
are all polarised in the same way.
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