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Home >> BMW >> 2009 >> 528xi Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 2259 (Self Diagnosis - Theory & Operation (N54)) >> 1.14 Comprehensive Component Monitoring OBD II Siemens VDO function definition >> 1.14.3 Intake Air Temperature (IAT) Monitoring >> 1.14.3.1 Electrical Intake Air Temperature Diagnosis >> 1.14.3.1.1 General description

1.14.3.1.1 General description

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The purpose of this diagnosis is to detect electrical faults as defined in OBDI requirements. The input signal is analog from a NTC and has to be in a calibratible range. Short circuit to ground can be detected immediately, short circuit to voltage battery or open load after a delay time. If an error symptom is detected, the error counter is de-bounced.

Error Symptoms

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