Secondary Parameters And Enable Conditions

Dynamic diagnosis:

Enable Conditions:

• engine running (after start phase reached)
• IAT within min/max thresholds: -9.75 °C < IAT < 110.25 °C
• ECT higher than min threshold: > -9.75 °C
• cold start conditions fulfilled:

  |ECT at engine stop - ECT at engine start| > 45 °C

  |ECT at engine start - measured value of IAT at engine start| < 3.75 °C

• time after start higher than min threshold: > 1,000 s
• distance driven since start higher than min threshold: > 10,000 m
• IAT dynamic diagnosis not performed within this driving cycle yet

Plausibility diagnosis:

• engine coolant temperature value higher than min threshold: > -9.75 °C
• mass air flow integral value higher than calibrated threshold: > 0 kg
• conditions for "decrease test" must have been fulfilled at least one time
• specific additional conditions for "increase test"

Conditions for increase tests:

• mass air flow integral value higher than calibrated threshold: > 3.99 kg
• increase test request

Conditions for decrease tests:

• mass air flow integral value higher than calibrated threshold: > 7 kg
• increase test request