Checking Diagnostic Trouble Code (DTC) Status

Checking diagnostic trouble code (DTC) status

Hint: Diagnostic trouble codes (DTCs) ECC-122, ECC-211, ECC-222, ECC-231 and ECC-235 stored at the same time indicate a fault in a common section of the damper motors and outside temperature sensor circuit. The status of the fault can be read off by checking the diagnostic trouble code (DTC) counter. This is why this fault-tracing should be carried out.









- Ignition on.
- Wait at least 10 seconds for the control module to carry out its diagnostic.

Read off diagnostic trouble codes (DTCs).

Has the DTC status changed to intermittent fault?

Yes Intermittent Fault

No Checking Cables