DTC U1002: Lost Communication with Gateway Module: Description

WARNING: This page is about a different car, the 2008 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.

If 2 or more DTCs are output during the DTC check, one side of the CAN branch wire may he open. (One side of the CANH [branch wire]/CANL [branch wire] of the ECU and/or sensor is open.)

DTC TABLE

DTC Code	Symptom	Trouble Area
U1002	Lost communication with gateway module	MS bus circuit Front power seat control ECU and switch LH branch wire or connector Multiplex tilt and telescopic ECU branch wire or connector Outer mirror control ECU branch wire or connector Combination meter ECU main wire or connector Main body ECU main wire or connector Front power seat control ECU and switch LH Multiplex tilt and telescopic ECU Outer mirror control ECU Combination meter ECU Main body ECU No. 3 junction connector