Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information UEM-0090

Condition
The upper electronic module (UEM) checks the power supply to the LEDs in the display in the rear view mirror. The five LEDs are supplied with power via the same cable and are internally mounted in the rear view mirror.
Diagnostic trouble code (DTC) UEM-0090 is stored in the control module if the upper electronic module (UEM) registers too low a signal for the power supply to the LEDs in the display in the rear view mirror.
Diagnostic trouble code (DTC) UEM-0090 can be diagnosed when the LEDs in the rear view mirror are supplied with power, i.e. when the LEDs in the display satisfy conditions for lighting.

Substitute value
- None.

Possible source
- The power supply cable to LEDs in the display in the rear view mirror is short-circuited to ground.

Fault symptom[s]
- The SRS indicator lamp is lit.