On-vehicle Inspection ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT FOG LIGHT RELAY 
(a) Remove the fog light relay from the engine room relay box.
(c) Install the fog light relay to the engine room relay box. |
Toyota Tundra Service Manual > Lighting System: Lost Communication With Image Processing Module "A" (U023A)
DESCRIPTION These DTCs are stored when the CAN communication system is malfunctioning. DTC No. Detection Item DTC Detection Condition Trouble Area U023A Lost Communication With Image Processing Module "A" The main body ECU (multiplex network body ECU) does not receive data from the forward ...
