B1204

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

DESCRIPTION

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





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

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





(a) Disconnect K12 ECU connector.

(b) Measure the voltage and resistance of the wire harness side connector.

Standard voltage:





Standard resistance:





OK -- Continue to next step.

2. CHECK WIRE HARNESS (INTEGRATION CONTROL AND PANEL ASSEMBLY - GATEWAY ECU)





(a) Disconnect the K12 and K66 ECU connectors.

(b) Measure the resistance of the wire harness side connectors.

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- Continue to next step.

3. CHECK WIRE HARNESS (INTEGRATION CONTROL AND PANEL ASSEMBLY - A/C AMPLIFIER)





(a) Disconnect the K12 ECU connector.

(b) Disconnect the K52 A/C amplifier connector.

(c) Measure the resistance of the wire harness side connectors.

Standard resistance:





Result:





C -- REPLACE INSTRUMENT CONTROL AND PANEL ASSEMBLY AND REPAIR OR REPLACE HARNESS AND CONNECTOR

B -- REPAIR OR REPLACE HARNESS AND CONNECTOR

A -- REPLACE INSTRUMENT CONTROL AND PANEL ASSEMBLY