98
12/04
SPIDER MAX 500
B
Check the connection to the central unit.
Make sure the central unit is receiving power
supply.
Replace the central unit if necessary.
Restore or replace the connections.
Start the engine and make sure that the voltage decreases according to the increase in temperature, as
indicated in the table.
The temperature signal is normal.
Replace the temperature sensor.
NOTE - In order to perform a more precise check of the
sensor, remove it from the engine and check its resistance
at controlled temperature.
Using a suitable container, plunge part of the sensor metal
prod into the water, warm it up gradually and read the
temperature and resistance values.
Compare with the table values.
TERMINALS
CONDITIONS
STANDARD
18 - 22
intake air temperature 20°
With the sensor connected:
3750 ± 200
Ω
16.
INTAKE AIR TEMPERATURE SENSOR
Sch. 10
F. 82
CENTRAL UNIT
Central unit ground
Throttle
potentiometer
Air
temperature
sensor
Dashboard
connector
Engine
temperature
sensor
Dashboard
