Diagnostic trouble code (DTC) information
Condition
Diagnostic trouble code (DTC) CCM-001F is stored if the control module registers that the signal from the air quality sensor has a pulse length which exceeds 97% of the period.
Diagnostic trouble code (DTC) CCM-001F can only be diagnosed for electronic climate control modules (CCM) (ECC version) with air quality sensors.
Substitute Value
- The control module does not permit the recirculation shutter to close in the air quality sensor mode while the fault persists
- No air quality function.
Possible Source
- Open-circuit in the signal cable between the control module and the air quality sensor
- Short-circuit to supply voltage in the signal cable between the control module and the air quality sensor
- Defective air quality sensor.
Fault symptom[s]
- Poor air quality in the passenger compartment.