B1263

MULTIPLEX COMMUNICATION: MULTIPLEX COMMUNICATION SYSTEM: B1263: Luggage Room Junction Block ECU Communication Stop

DTC B1263 - Luggage Room Junction Block ECU Communication Stop

DESCRIPTION

B1263 will be output when the communication between the luggage room junction block ECU and network gateway ECU stops for more than 10 seconds.






WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK WIRE HARNESS (LUGGAGE ROOM JUNCTION BLOCK ECU - BATTERY AND BODY GROUND)




(a) Disconnect the 6A and 6F junction block connectors.
(b) Disconnect the L24 ECU connector.
(c) Measure the resistance and voltage of the wire harness side connectors.
Standard voltage:






Standard resistance:






NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- Continue to next step.
2. CHECK RESISTANCE OF COMMUNICATION LINE




(a) Disconnect the C11 switch connector.
(b) Disconnect the G3 and L24 ECU connectors.
(c) Measure the resistance of the wire harness side connectors.
Standard resistance:






Result





C -- REPAIR OR REPLACE HARNESS AND CONNECTOR
B -- REPLACE LUGGAGE ROOM JUNCTION BLOCK ASSEMBLY AND REPAIR OR REPLACE HARNESS AND CONNECTOR
A -- REPLACE LUGGAGE ROOM JUNCTION BLOCK ASSEMBLY