1.3 MULTIJET 16V
(75 & 90 HP)
FIAT PUNTO TRAINING OUTLINE
Fiat Auto S.p.A.
After Sales Training
Diagram for sucked air temperature ground digital meter
3
2
B
C
A
A = temperature value digital output
B = power supply (12 V)
C = ground
E = air flow value digital output.
1 = function generator
2 = data memory
3 = A/D converter.
DIGITAL AIR FLOW METER OPERATION
Temperature signal trend
In the digital air flow meter, the temperature value (sent to the engine management control
unit) is a signal of the PWM, duty-cycle type (fixed frequency).
The working voltage is 5 V, whereas the measuring interval ranges between –50 ºC and +150
ºC (with a resulting duty-cycle value in the range of 10% to 90%).
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E