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 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) Turn the engine switch on (IG)
(c) Measure the voltage of the wire harness side connector.
Standard voltage:






NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- Continue to next step.
2. CHECK WIRE HARNESS (TIRE PRESSURE WARNING ECU - BODY GROUND)





(a) Disconnect the K45 ECU connector.
(b) Measure the resistance of the wire harness side connector.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- Continue to next step.
3. CHECK WIRE HARNESS (TIRE PRESSURE WARNING ECU - COMBINATION METER)





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






NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- Continue to next step.
4. CHECK WIRE HARNESS (TIRE PRESSURE WARNING ECU - GATEWAY ECU)





(a) Disconnect the K45 ECU connector.
(b) Disconnect the K66 gateway ECU connector.
(c) Measure the resistance of the wire harness side connector.
Standard resistance:






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