On-Board Diagnostics

Type of diagnosis: 

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

Enable criteria: 

• Tests 1, 2 and 3:  Engine running. A counter accumulates a value for each second that passes since the engine was started. With the accelerator pedal depressed, the value is 1 and with the accelerator pedal released, the value is 0.5. Starting temperatures for intake air and coolant have been registered and the lowest of them has been selected.

Fault criteria: 

• Test 1:  When the temperature value is below -7°C, the counter reaches 600 before closed loop starts.
• Test 2:  When the temperature value is between -7°C and 10°C, the counter reaches 300 before closed loop starts.
• Test 3:  When the temperature value exceeds 10°C, the counter reaches 120 before closed loop starts.

Dependents: 

• P0115 . P0119 , P1131 , P1132 , P1133 .

System reaction to a fault: 

• None.

OK report: 

• Test 1: The number of adapted engine revolutions has at some time dropped. Test 2 performed once and fault criteria not fulfilled.

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

• Type III.