B1247

MULTIPLEX COMMUNICATION: MULTIPLEX COMMUNICATION SYSTEM: B1247: Tire Pressure Monitor Receiver Communication Stop

DTC B1247 - Tire Pressure Monitor Receiver Communication Stop

DESCRIPTION

This DTC is detected when the communication between the tire pressure warning ECU and network gateway ECU stops for more than 10 seconds.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1.
CHECK WIRE HARNESS (TIRE PRESSURE WARNING ECU - BATTERY AND BODY GROUND)




(a) Disconnect the K45 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.
2. CHECK RESISTANCE OF COMMUNICATION LINE




(a) Disconnect the K45 ECU connector.
(b) Disconnect the K66 network gateway ECU and K31 combination meter connector.
(c) Measure the resistance of the wire harness side connectors.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE TIRE PRESSURE WARNING ECU