DTC B1003: ECU Malfunction [11/2016 - ]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Central Gateway / Trouble Codes.

   Body Electrical > Central Gateway > Trouble Codes 

   Result

   Result	Proceed to
   DTC B1003 is not output from the network gateway ECU (Techstream display: Central Gateway)	A
   DTC B1003 is output from the network gateway ECU (Techstream display: Central Gateway)	B

Result: 

A 

USE SIMULATION METHOD TO CHECK. Refer to  ELECTRONIC CIRCUIT INSPECTION PROCEDURE [12/2013 - ] 

Result: 

B 

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU). Refer to  REMOVAL [11/2016 - ]