STEP 6. Check the lighting control sensor.
Disconnect lighting control sensor connector E-08, and check whether the following DTC U1109 is set.(1) Connect all the relevant ECUs, and disconnect lighting control sensor connector E-08 only.
(2) Erase the DTC.
(3) Turn the ignition switch from "LOCK" (OFF) to "ON" position.
(4) Check whether DTC U1109 is set.
(5) Turn the ignition switch to the "LOCK" (OFF) position.
Is the DTC set?
Reconnect the lighting control sensor connector, and go to Step 7. Replace the lighting control sensor.