B1209

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

DESCRIPTION

* This DTC is detected if communication between the outer mirror control ECU LH and gateway ECU stops for more than 10 seconds.





WIRING DIAGRAM





INSPECTION PROCEDURE

HINT
If "+B of GND short malfunction of communication bus" DTCs (B1214 and B1215) are detected at the same time as "communication stop" DTC B1209, repair the "+B or GND short malfunction of communication bus" DTCs first B1214.

PROCEDURE

1. INSPECT FUSE (FR DOOR LH, MPX-B)

(a) Remove the FR DOOR LH fuse from the main body ECU LH (cowl side junction block LH).

(b) Remove the MPX-B fuse from the engine room relay block No. 1.

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

Standard Resistance:





NG -- REPLACE FUSE (FR DOOR LH, MPX-B)
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (OUTER MIRROR CONTROL ECU LH - BATTERY AND BODY GROUND)

(a) Disconnect the M10 connector.





(b) Measure the voltage and resistance according to the value(s) in the table below.

Standard Voltage:





Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (OUTER MIRROR CONTROL ECU LH - BATTERY AND BODY GROUND)
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (COMMUNICATION LINE)

(a) Disconnect the M10, J55 and 2F connectors.





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

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE OUTER MIRROR CONTROL ECU LH Removal