B1216

MULTIPLEX COMMUNICATION: MULTIPLEX COMMUNICATION SYSTEM: B1216: Rear Door ECU RH Communication Stop
B1216 - Rear Door ECU RH Communication Stop

DESCRIPTION

* This DTC is detected when communication between the multiplex network door ECU rear RH (rear door RH ECU) and the network gateway ECU stops for more than 10 seconds.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK OPERATION

(a) Open the rear door RH and check that the door warning light (built in the combination meter) illuminates.

OK:

Door warning light illuminates.

NG -- CHECK WIRE HARNESS (MULTIPLEX NETWORK DOOR ECU REAR RH (REAR DOOR RH ECU) - BATTERY AND BODY GROUND)

OK -- REPLACE MULTIPLEX NETWORK DOOR ECU REAR RH

2. CHECK WIRE HARNESS (MULTIPLEX NETWORK DOOR ECU REAR RH (REAR DOOR RH ECU) - BATTERY AND BODY GROUND)





(a) Disconnect the O3 ECU connector.

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

Standard voltage:





Standard resistance:





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

3. CHECK RESISTANCE OF COMMUNICATION LINE





(a) Disconnect the O3, O7 and M4 ECU connectors.

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

Standard resistance:





Result:





C -- REPAIR OR REPLACE HARNESS AND CONNECTOR

B -- REPLACE MULTIPLEX NETWORK DOOR ECU REAR RH AND WIRE HARNESS CONNECTOR

A -- REPLACE MULTIPLEX NETWORK DOOR ECU REAR RH