Condition for fault identification

Test condition:

A fault is recognized when the engine temperature is below 80 °C when the test is executed. Because the test time is defined by the temperature model, it is also determined by the model's input variables (air mass, ambient temperature and model temperature).

Potential problem source(s):

• Defective wiring harness
• Characteristic map thermostat defective

Terminal condition: none

Voltage condition:

• Onboard electrical system voltage between 9 V and 16 V

Temperature condition:

• Coolant temperature sensor less than 40 °C

Time condition:

• None

Other conditions:

• Engine cold start
• Vehicle speed in excess of 30 km/h
• Ambient temperature higher than minus 10°C
• Engine speed between 800 RPM and 7000 RPM