Fiat Bravo Service Manual page 138

Engine
Fuel system
10.
Wiring connector
The numbers in boxes indicate the corre-
sponding control unit pins.
36
LAMBDA PROBE (0.258.003.466)
The vehicle is fitted with a four channel hot
lambda probe which measures exhaust gas
oxygen content. Refer to Fuel System section
in the 1581 16V manual for a full description
of the lambda probe
A
Removing-refitting
P4A004B02
- Place the vehicle on a lift.
- Disconnect battery negative lead.
- Raise the vehicle
- Disconnect electrical connection
- Remove the lambda probe from its seat.
- When tightening, do not force the compo-
nent or it could be irreparably damaged.
A
Checking resistance
Probe heater resistance may be measured by
disconnecting connector and connecting an
ohmmeter as shown in the figure.
Resistance: 4.5 ± 0.5 ohm at 20 °C
Bravo-Brava
The probe may be swiftly put out of
service by the presence
slight amounts of lead in the fuel.
If fitting a new lambda
spread threaded part with anti-seize
graphite grease (e.g.
14016- FT).
Tightening torque 5 - 6 daIMm
Publication
12v
of even
probe,
Bosch VS
no. 506.670