Workshop Manuals Factory service & repair Fiat
Fiat Punto (176) Factory Service Manual (1993-1999)02 · 10 Engine
02 · Engine

Wiring connector

Make
Fiat
Model
Punto (176) Factory Service Manual
Year
1993–1999
Section
Fuel system (1242 16v) › Wiring connector
10 EngineWiring connector
Diagram of the butterfly valve position sensor connector showing pins A, B, and C with their corresponding polarity symbols (-), (+), and (S).
A Negative (pin 16) B Positive (pin 14) C Signal (pin 30) This sensor comprises a potentiometer with the moving part operated by the butterfly valve shaft. The potentiometer, is the single ramp type and has the following main features: Useful electric angle 90° ± 2° Mechanical angle 105° ± 4° Total mechanical travel 110° ± 8° Temperature operating range -30°C - +125°C.
Schematic diagram of the wiring connector showing the pin layout for terminals A, B, and C mapped to control unit pins 16, 14, and 30 respectively.

Wiring connector

The numbers indicate the corresponding control unit pins.

Checking the electrical resistance

The sensor resistance can be measured in the following way: - connect an ohmmeter between pins A and B of the sensor and carry out the checked with a fixed resistance of 1440 ohm; - then connect the ohmmeter between pins A and C and on opening/closing the butterfly valve, check that the resistance value varies between 960 and 1440 ohm.
Circuit diagram illustrating the connection of an ohmmeter across pins A and C of the sensor's internal potentiometer to measure resistance variation.

Recovery

An angular value is taken according to the engine speed and pressure relating to the nominal idle speed.

Parts & tools for this job For 1993 Fiat Punto

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