Diagnostic Trouble Code (DTC) Information UEM-00A9

Condition 

Fig 1: Identifying Rear View Mirror

Courtesy of VOLVO CARS OF NORTH AMERICA.

The upper electronic module (UEM) has a configuration file which controls certain internal settings. The upper electronic module (UEM) checks that the configuration file is correct.

The diagnostic trouble code (DTC) is stored if the upper electronic module (UEM) registers that the configuration file is incorrect or missing.

The diagnostic trouble code (DTC) can be detected when the control module is initialized after being reset or when diagnostic trouble codes (DTCs) are erased.

Substitute Value 

• Factory settings are used.

Possible Source 

• Incorrect or missing configuration file.

Fault symptom[s] 

• None.