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 communication between the tire pressure monitor receiver and network gateway ECU stops for more than 10 seconds.






WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT FUSE (MPX-B2)
(a) Remove the P-IG fuse from the passenger side junction block.
(b) Measure the resistance of the fuse.
Standard resistance:
Below 1 Ohms
NG -- REPLACE FUSE
OK -- Continue to next step.
2. CHECK WIRE HARNESS (TIRE PRESSURE MONITOR RECEIVER - BATTERY AND BODY GROUND)




(a) Disconnect the T9 receiver connector.
(b) Measure the voltage and resistance of the wire harness side connector.
Standard voltage:






Standard resistance:






NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- Continue to next step.
3. CHECK RESISTANCE OF COMMUNICATION LINE




(a) Disconnect the A9 and G3 ECU connectors.
(b) Disconnect the T9 receiver connector.
(c) Measure the resistance of the wire harness side connectors.
Standard resistance:






Result





C -- REPAIR OR REPLACE HARNESS AND CONNECTOR
B -- REPLACE TIRE PRESSURE MONITOR RECEIVER ASSEMBLY AND REPAIR OR REPLACE HARNESS AND CONNECTOR
A -- REPLACE TIRE PRESSURE MONITOR RECEIVER ASSEMBLY