Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information CCM-DD01

Condition




The diagnostic trouble code (DTC) is stored if the climate control module (CCM) detects a short-circuit to supply voltage or ground in LIN bus 1.
A short-circuit to supply voltage or ground in the LIN bus will affect communications and the function of all the components.
The climate control module (CCM) communicates with damper motors, air quality sensors and seat heating via two LIN buses.
The number of components in LIN bus 1 can vary depending on the vehicle equipment (ECC/MCC and options) and if the vehicle has right-hand drive or left-hand drive.
The following components communicate on LIN bus 1:
- damper motor air distribution
- damper motor, temperature left
- damper motor recirculation (only on right-hand drive cars)
- air quality sensor (AQS) (only on right-hand drive cars)
- left seat heater.
The diagnostic trouble code (DTC) can be detected at key position 1 or 2 (not key position 3).

Substitute value
- None.

Possible source
- LIN bus 1 short-circuited to supply voltage
- LIN bus 1 short-circuited to ground.

Fault symptom[s]
- Misting on the windows and/or door mirrors.
- Air flow problem.
- Poor heating in the passenger compartment.
- Temperature control/Uneven temperature
- The front seat heating does not function.
- Poor air quality in the passenger compartment.