Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information CCM-0040

Condition




The diagnostic trouble code (DTC) is stored if the climate control module (CCM) detects a fault in the air quality sensor (AQS).
The climate control module (CCM) communicates with the air quality sensor (AQS) via LIN bus 1 for right-hand drive cars and via LIN bus 2 for left-hand drive cars.
The air quality sensor (AQS) sends information to the climate control module (CCM) about status.
The diagnostic trouble code (DTC) can only be diagnosed for the climate control module (CCM) of electronic climate control (ECC) equipped with the air quality sensor (AQS).
The diagnostic trouble code (DTC) can be detected at key positions 1 and 2 (not key position 3).

Substitute value
- None.

Possible source
- The air quality sensor (AQS) is not functioning.

Fault symptom[s]
- Poor air quality in the passenger compartment.