B1201

MULTIPLEX COMMUNICATION: MULTIPLEX COMMUNICATION SYSTEM: B1201: Mayday ECU Communication Stop

DTC B1201 - Mayday ECU Communication Stop

DESCRIPTION
- This DTC is output when communication stops between the mayday ECU and body ECU.






WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (COMMUNICATION LINE)




(a) Disconnect the M15, S28 and B5 ECU connectors.
(b) Check the resistance between the wire harness side connectors.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (POWER SOURCE)




(a) Check the voltage between the wire harness side connectors.
Standard voltage:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (GROUND)




(a) Check the resistance between the wire harness side connectors.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE MAYDAY ECU