UEM-0031

Condition
If the control unit detects that the rear left reading lamp is on when the front left reading lamp is off, a faulty control signal from the lamp circuit displays the diagnostic trouble code.

Condition
- The lamp goes off.

Possible source
- Open circuit in signal wire for rear left reading lamp. Short circuit to voltage supply on signal wire for rear left reading lamp.

Condition
- Courtesy lighting does not work.