B1206

NETWORKING: MULTIPLEX COMMUNICATION SYSTEM: B1206: P/W Master Switch Communication Stop

DTC B1206 - P/W Master Switch Communication Stop

DESCRIPTION

This DTC is detected if communication between the multiplex network master switch and gateway ECU stops for more than 10 seconds.





WIRING DIAGRAM





INSPECTION PROCEDURE
HINT: If "+B of GND short malfunction of communication bus" DTCs (B1214 and B1215) are detected at the same time as "communication stop" DTC B1206, repair the "+B or GND short malfunction of communication bus" DTCs first B1214.

PROCEDURE

1. INSPECT FUSE (FR DOOR LH)
(a) Remove the FR DOOR LH fuse from the main body ECU LH (cowl side junction block LH).
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:






NG -- REPLACE FUSE (FR DOOR LH)
OK -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK MASTER SWITCH - BATTERY AND BODY GROUND)





(a) Disconnect the M7 connector.
(b) Turn the engine switch on (IG).
(c) Measure the voltage and resistance according to the value(s) in the table below.
Standard Voltage:






Standard Resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (MULTIPLEX NETWORK MASTER SWITCH - BATTERY AND BODY GROUND)
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (COMMUNICATION LINE)





(a) Disconnect the M7, Q3 and P33 connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE MULTIPLEX NETWORK MASTER SWITCH