B1272

MULTIPLEX COMMUNICATION: MULTIPLEX COMMUNICATION SYSTEM: B1272: Power Seat ECU Communication Stop

DTC B1272 - Power Seat ECU Communication Stop

DESCRIPTION

This DTC is detected when communication between the power seat ECU and gateway ECU stops for more than 10 seconds.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (POWER SEAT ECU - BATTERY AND BODY GROUND)
(a) Disconnect the P13 and P14 ECU connectors.




(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 P13 and G1 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 POWER SEAT ECU