Diagnostic Trouble Code Information UEM-0084

Condition 

Fig 1: Locating Rain Sensor Module

Courtesy of VOLVO CARS OF NORTH AMERICA.

The upper electronic module (UEM) regularly checks communication with the rain sensor.

The diagnostic trouble code (DTC) is generated if the upper electronic module or the rain sensor registers a fault in communication.

The diagnostic trouble code can be diagnosed when the ignition is on.

Substitute Value 

• Intermittent windshield wiping.
• High speed windshield wiping.

Possible Source 

• Contact resistance or oxidation on the signal cable.
• Communication disrupted.
• Faulty rain sensor.

Fault symptom[s] 

• No rain sensor function.