B1209

MULTIPLEX COMMUNICATION: MULTIPLEX COMMUNICATION SYSTEM: B1209: Driver Side Outer Mirror

DTC B1209 - Driver Side Outer Mirror

DESCRIPTION
This DTC is detected when communication between the driver side outer mirror ECU (memory mirror ECU) and gateway ECU stops for more than 10 seconds.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (MEMORY MIRROR ECU - BATTERY AND BODY GROUND)
(a) Disconnect the H1 ECU connector.




(b) Measure the voltage according to the value(s) in the table below.
Voltage:





(c) Measure the resistance according to the value(s) in the table below.
Resistance:






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

2. CHECK RESISTANCE OF COMMUNICATION LINE
(a) Disconnect the H1 and E2 ECU connectors.




(b) Measure the resistance according to the value(s) in the table below.
Resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE MEMORY MIRROR ECU