DTC U1002: Lost Communication with Gateway Module (Network Gateway ECU) [10/2014 - 10/2015]: Description

The network gateway ECU will store this DTC when no signals can be received from the ECUs that have been memorized as those that are connected to sub bus 2.
When the network gateway ECU receives a response signal from the ECUs connected to sub bus 2, the network gateway ECU recognizes and memorizes that the ECU is connected to sub bus 2. Based on this memorized data, the network gateway ECU monitors for malfunctions in the ECUs connected to sub bus 2 when communicating with those ECUs. If the network gateway ECU cannot receive response signals from the ECUs that have been memorized as those connected to sub bus 2, the network gateway ECU determines that a malfunction exists.

DTC No.	DTC Detection Condition	Trouble Area
U1002	The network gateway ECU cannot receive signals from all ECUs that have been memorized as those connected to sub bus 2.	Open or short in sub bus 2 main lines or connector Open or short in sub bus 2 branch lines or connector Network gateway ECU Seat belt control ECU1 Driving support ECU assembly1 Blind spot monitor sensor LH2 Rear television camera assembly3 Open or short in No. 4 CAN junction connector Open or short in No. 5 CAN junction connector Open or short in No. 2 CAN junction terminal

HINT:

This diagnosis procedure is for when DTC U1002 is output by the network gateway ECU (Techstream display: Gateway).