Alfa Romeo 159 Training Material page 103

ENGINE
The current crosses a Wheatstone bridge which imbalances it and determines a potential difference which is
detected. The analogue flow meter has a 5 pin connector.
The connections to the engine ECU are:
CONNECTION TO ECU
- connector pin 1 to ECU pin 27 side
A
- pin 2 power from ECU (used to
guarantee air flow signal output
independent from battery voltage
variations)
- connector pin 3 to ECU pin 11 side
A
- connector pin 4 to ECU pin 26 side
A
- connector pin 5 to ECU pin 12
side A
STRUCTURE
1. Female connector
2. Cylindrical body
3. Circuit cover
4. Measuring conduit cover
5. Measuring conduit
6. Circuit
7. Sensor
8. Circuit assembly plate
9. O-ring
10. Temperature sensor
Traccia Didattica Alfa 159-en-ridotta
ALFA 159 TRAINING MATERIAL
CONNECTOR
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