On-Board Diagnostics

Type of diagnosis: 

• Once per driving cycle. Interrupted when fault criteria fulfilled or OK reported. Restarts next driving cycle.

Enable criteria: 

• General conditions for this diagnostic trouble code: Atmospheric pressure must exceed 72 kPa as well as coolant and intake air temperature exceed -7°C.
• Crankshaft rotated more than 4000 engine revolutions since start.

Fault criteria: 

• Engine coolant temperature has changed less than 1°C since start.

Dependents: 

• None.

System reaction to a fault: 

• A substitute value is calculated continuously as follows: Starting intake air temperature is incremented with 1°C per 60 g air mass/s. The value is maximized to 90°C and is used as soon as fault criteria for the sensor are fulfilled.

OK report: 

• Enable criteria fulfilled without fault reports.

Fault handling:  For more information, see FAULT HANDLING III, OTHER EMISSION-RELATED COMPONENTS AND FUNCTION )

• Type III.