B1206

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

DTC B1206 - P/W Master Switch Communication Stop

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





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK OPERATION
(a) Turn the power switch ON (IG) and check that the power window can be operated using the multiplex network master switch.
OK:
Power window can be operated using multiplex network master switch.
OK -- REPLACE MULTIPLEX NETWORK MASTER SWITCH
NG -- Continue to next step.
2. CHECK WIRE HARNESS (MULTIPLEX NETWORK MASTER SWITCH - BATTERY)





(a) Disconnect the Q13 switch connector.
(b) Measure the voltage of the wire harness side connector.
Standard voltage:






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





(a) Disconnect the M9 and K73 ECU connectors.
(b) Disconnect the Q13 switch connector.
(c) Measure the resistance of the wire harness side connectors.
Standard resistance:






Result





C -- REPAIR OR REPLACE HARNESS OR CONNECTOR
B -- REPAIR OR REPLACE MULTIPLEX MASTER SWITCH AND WIRE HARNESS OR CONNECTOR
A -- REPLACE MULTIPLEX NETWORK MASTER SWITCH