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13.5.3 Crankshaft trigger sensor
When controlling the ignition with a trigger wheel, it is necessary to have a sensor that reads the signal from its
teeth and informs the engine position to the injection. There are two types of crankshaft trigger sensors:
Magnetic sensor: this is the type that is most commonly used in cars nowadays, especially with 60-2 and 36-1
trigger wheels. One of its main characteristics is that it does not receive 12V or 5V; it only generates an
electromagnetic signal based on induction. It might have 2 or 3 wires (the third wire is an electromagnetic shield).
Hall Effect sensor: it is usually found on 2, 3 and 4-tooth trigger wheels and some 36-1 and 60-2 types. It receives
a 5V or 12V feed and emits a square wave signal. It invariably has 3 pins: voltage, negative and signal.
Crank trigger sensors table
Chevrolet Corsa 8V MPFI, Omega 2.2, 4.1 e 2.0
(Alcohol), S10 2.2, Silverado, Astra, Kadett MPFI,
Vectra, Calibra, VW Golf, Passat, Alfa 164 3.0
Pin 1: red wire (2 core shielded cable)
Pin 2: white wire (2 core shielded cable)
Pin 3:
Chevrolet Omega 2.0 Gasoline e 3.0, Corsa 16V/GSi,
Tigra, Fiat Marea 5 Cylinders, Citroën ZX 2.0, Xantia
2.0, Peugeot 306 2.0 16V, Peugeot 405MI
Fiat Linea 1.9 16V
Pin 1: white wire (2 core shielded cable)
Pin 2: red wire (2 core shielded cable)
Pin 3: shield (2 core shielded cable)
Pin 1: red wire (2 core shielded cable)
Pin 2: white wire (2 core shielded cable)
Pin A: red wire (2 core shielded cable)
Pin B: white wire (2 core shielded cable)
Magneti Marelli
(Nº Fiat 464.457.31)
(Nº Marelli
4820171010)
Fiat Palio, Uno, Strada, Siena 1.0 1.5 8V MPI
Pin +: red wire (2 core shielded cable)
Pin : white wire (2 core shielded cable)
Pin S : shield (2 core shielded cable)
Delphi 3 Wires
(3 teeth wheel)
Pin A: 5V (FT green/red wire)
Pin B: battery negative
Pin C: red wire (2 core shielded cable)
Fiat engine E-TorQ
1.8 16V
Fiat engine E-TorQ
1.8 16V
Pin 1: battery negative
Pin 2: red wire (2 core shielded cable)
Pin 3: 5V (FT green/red wire)
VW TotalFlex/Gol Gti
Hyundai Tucson 2.0 16V
All VW AP TotalFlex
Hyundai Tucson 2.0 16V
Pin 1: 5V (FT green/red wire)
Pin 2: red wire (2 core shielded cable)
Pin 3: battery negative
Suzuki Hayabusa and Suzuki SRAD
Pin 1: red wire (2 core shielded cable)
Pin 2: white wire (2 core shielded cable)
Mitsubishi 1.6 16V
(2 teeth)
Mitsubishi Colt and Lancer
Pin 1 - black: battery negative
Pin 2 - brown: red wire (2 core shielded
cable)
Pin 3 - red: 5V (FT green/red wire)
VW/Audi 20V 3 wires
Bosch 0261210148
Audi A3 1.8 20V
VW Golf 1.8 20V/Golf 1.6, 2.0/Bora 2.0
Pin 1: shield (2 core shielded cable)
Pin 2: white wire (2 core shielded cable)
Pin 3: red wire (2 core shielded cable)
Pin 1: 5V (FT green/red wire)
Pin 2: shield (2 core shielded cable)
Pin 3: red wire (2 core shielded cable)
Testing a sensor for hall or magnetic
A very simple test using a tester can identify if a Crankshaft Trigger Sensor is an inductive or a Hall Effect sensor.
Turn the tester
pin 1 with the other two. If a resistance of 600-1200
found among any of the pins, or if the resistance found is much higher than 1200
inductive sensor with a broken coil.
Notice that, when finding the resistance between pins 2 and 3, for example, pin 1 must be connected to the
white and red wires connections.
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