B1205

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

DTC B1205 - AFS ECU Communication Stop

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





WIRING DIAGRAM





INSPECTION PROCEDURE
HINT:
When "+B of GND short malfunction of communication bus" DTCs (B1266 and B1267) are detected at the same time as "communication stop" DTC B1205, repair the "+B or GND short malfunction of communication bus" DTCs first.

PROCEDURE

1. INSPECT FUSE (H-LP LVL)
(a) Remove the H-LP LVL fuse from the cowl side J/B 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 - BATTERY AND BODY GROUND)




(a) Disconnect the A27 ECU connector.
(b) Turn the engine switch on (IG).
(c) 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 A27, J58 and J34 ECU connectors.
(b) Measure the resistance between the specified terminals on the wire harness side connectors.
Standard resistance:






Result:






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