B1200

MULTIPLEX COMMUNICATION: MULTIPLEX COMMUNICATION SYSTEM: B1200: MPX Body ECU Stop
B1200 - MPX Body ECU Stop

DESCRIPTION

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





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

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

(a) Disconnect the IA and IF 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 D6, D13, IR and E30 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 BODY ECU AND REPAIR OR REPLACE HARNESS OR CONNECTOR

A -- REPLACE BODY ECU