B1248

MULTIPLEX COMMUNICATION: MULTIPLEX COMMUNICATION SYSTEM: B1248: AVC-LAN Communication Impossible

DTC B1248 - AVC-LAN Communication Impossible

DESCRIPTION

This DTC is detected when communication is impossible between the radio receiver assembly and network gateway ECU.






WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK OPERATION (STEERING PAD SWITCH)
(a) Check that the steering pad switch can operate the audio system normally.
OK:
Steering pad switch can operate the audio system normally.
OK -- REPLACE RADIO RECEIVER ASSEMBLY
NG -- Continue to next step.
2. CHECK RESISTANCE OF COMMUNICATION LINE




(a) Disconnect the G3 ECU connector.
(b) Disconnect the R1 receiver connector.
(c) Measure the resistance of the wire harness side connectors.
Standard resistance:






Result





C -- REPAIR OR REPLACE HARNESS AND CONNECTOR
B -- REPLACE RADIO RECEIVER ASSEMBLY AND REPAIR OR REPLACE HARNESS AND CONNECTOR
A -- REPLACE RADIO RECEIVER ASSEMBLY