B1205

MULTIPLEX COMMUNICATION: MULTIPLEX COMMUNICATION SYSTEM: B1205: AFS ECU Communication Stop
B1205 - AFS ECU Communication Stop

DESCRIPTION

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





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT FUSE (H-LP LVL)

(a) Remove the H-LP LVL fuse from main body ECU LH.

(b) Measure the resistance of the fuse.

Standard resistance:

Below 1 Ohms

NG -- REPLACE FUSE
OK -- Continue to next step.

2. CHECK WIRE HARNESS (AFS ECU - BODY GROUND)

(a) Disconnect the A29 ECU connector.





(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 A29 and A30 ECU connectors.

(b) Disconnect the 1X relay block connector.

(c) Measure the resistance of the wire harness side connectors.

Standard resistance:





Result





C -- REPAIR OR REPLACE AFS ECU AND REPAIR OR REPLACE HARNESS OR CONNECTOR

B -- REPAIR OR REPLACE HARNESS OR CONNECTOR

A -- REPLACE AFS ECU