B1287

MULTIPLEX COMMUNICATION: MULTIPLEX COMMUNICATION SYSTEM: B1287: Back Door ECU Communication Stop

DTC B1287 - Back Door ECU Communication Stop

DESCRIPTION

DTC B1287 is output when communication between the back door ECU and the gateway ECU stops for more than 10 seconds.






WIRING DIAGRAM





INSPECTION PROCEDURE
HINT: When "+B or GND short malfunction of communication bus" DTCs (B1214 and B1215) are detected at the same time as "communication stop" DTC B1287, repair the "+B or GND short malfunction of communication bus" DTCs first.

PROCEDURE

1. INSPECT FUSES (ALT, PBD, ECU-B)
(a) Remove the ALT, PBD and ECU-B fuses from the fusible link block.
(b) Measure the resistance of the fuses.
Standard resistance:
Below 1 Ohms
NG -- REPLACE FUSE
OK -- Continue to next step.
2. CHECK WIRE HARNESS (BACK DOOR ECU - BATTERY AND BODY GROUND)
(a) Disconnect the P13 and P14 ECU connectors.





(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.
3. CHECK RESISTANCE OF COMMUNICATION LINE





(a) Disconnect the P13 and P22 ECU connectors.
(b) Measure the resistance between the wire harness side connectors.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE BACK DOOR ECU