B - air intake circuit (page 2 of 2)

Make

Fiat

Model

Punto (176) Factory Service Manual

Year

1993–1999

Section

Fuel system (1242 MPI)

10 EngineB - air intake circuit · page 2 of 2

Terminal no.	Information received or transmitted	Terminal no.	Information received or transmitted
Input signals		Output signals
5	Available	1	Governor for supply to ignition coil primary winding no. 1
7	Available	2	Governor for supply to step motor, stage B
8	Air conditioner signal input	3	Supply to step motor, stage D
9	Available	4	Internal earth (high or low) with electronic safety feature for governing ECU relay
10	L serial line input for Fiat-Lancia tester diagnostic socket.	6	Failure warning light control
11	Input for rpm sensor negative and synchronism	14	Supply (+ 5V) to absolute pressure and throttle position sensors
12	Input for oxygen sensor negative (or lambda probe)	15	To serial line K for Fiat-Lancia tester diagnostic socket
13	Coolant sensor input	16	Earth for sensors: throttle position, coolant, intake air temperature
23	Earth (high or low)	17	Power earth
26	Available - for automatic transmission (selection D/N).	18	Governor for injector supply
27	Available	19	Governor for supply to ignition coil primary winding n° 2
28	Rpm and synchronism sensor positive input	20	Governor for supply to step motor, stage A
29	Input for oxygen sensor positive (or lambda probe)	21	Governor for supply to step motor, stage C
30	Input for throttle open position potentiometer signal	22	Activation of petrol vapour cut-off solenoid to active carbon filter
31	Input for intake air temperature sensor signal	23	Signal for pump safety stop and rev counter control (if fitted)
32	Input for absolute pressure sensor signal	24	Air conditioner relay control
34	Power earth	25	Available
35	Input for 12 Volt supply: activates all ECU functions	33	Available

02 Engine