Prins VSI CNG, Installation Manual

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Copyright © Prins Autogassystemen B.V. 2013 Page 31
Electrical connections Petrol Pressure Simulator 091/0252
Engines equipped with a return less fuel system. These engines can generate trouble codes and/or have
difficulties with the fuel trims(mixture) on both petrol and lpg.
Brands: Mainly brands who are connected with Ford technologies like:
* Ford models from 2003/2004
* Jaguar models from 2003/2004
* Some Volvo models from 2003
Connections and Set-up
Connect the PPS module according the shown schematic. Measure the voltage, on petrol, for the blue wire
(pressure sensor signal wire) when the engine is idling. Or read the actual petrol pressure when you have
the disposal of a scan tool which can read the actual petrol system pressure.
Next we have to setup the same Voltage (pressure) when running on LPG via de pot meter. The pot meter
is accessible when you remove the small protection cover of the module.
RED-
WH
ITE
B
L
U
E
B
L
U
E
-W
HITE
B
R
O
WN
VSI
PETROL ECU
Petrol Pressure signal sensor side Petrol Pressure signal ECU side
12 Volt C VSI wire 13
Sim Low=On VSI wire 26
Ground Battery VSI wire 50
PETROL
PRESSURE
SENSOR
Petrol Pressure Simulator
091/0252
1 2 3 4 4
Interrupt the petrol
pressure signal wire
GR
EY
-BLAC
K
0-5 Volt