B1207

MULTIPLEX COMMUNICATION: MULTIPLEX COMMUNICATION SYSTEM: B1207: Certification ECU Communication Malfunction
B1207 - Certification ECU Communication Malfunction

DESCRIPTION

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





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - BATTERY AND BODY GROUND)

(a) Disconnect the D39 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 D13, D39 and D44 ECU connectors.

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

Resistance:





Result:





C -- REPAIR OR REPLACE HARNESS OR CONNECTOR

B -- REPLACE CERTIFICATION ECU AND REPAIR OR REPLACE HARNESS OR CONNECTOR

A -- REPLACE CERTIFICATION ECU