B1204

MULTIPLEX COMMUNICATION: MULTIPLEX COMMUNICATION SYSTEM: B1204: Driver Side Seat Switch ECU Communication Stop

DTC B1204 - Driver Side Seat Switch ECU Communication Stop

DESCRIPTION

This DTC is detected when communication between the integration control and panel and network gateway ECU stops for more than 10 seconds.






WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1.
CHECK WIRE HARNESS (INTEGRATION CONTROL AND PANEL - BATTERY AND BODY GROUND)




(a) Disconnect K12 panel connector.
(b) Measure the voltage and resistance of the wire harness side connector.
Standard voltage:





Standard resistance





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
2. CHECK WIRE HARNESS (INTEGRATION CONTROL AND PANEL - GATEWAY ECU)




(a) Disconnect the K12 and K66 ECU connectors.
(b) Disconnect the K52 A/C amplifier connector.
(c) Measure the resistance of the wire harness side connectors.
Standard resistance:






Result





C -- REPAIR OR REPLACE INTEGRATION CONTROL AND PANEL ASSEMBLY AND REPAIR OR REPLACE HARNESS OR CONNECTOR
B -- REPAIR OR REPLACE HARNESS OR CONNECTOR
A -- REPLACE INTEGRATION CONTROL AND PANEL