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. INSPECT FUSE (ECU-IG)
(a) Remove the ECU-IG fuse from the driver 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 WARNING ECU - BATTERY AND BODY GROUND)




(a) Disconnect the T11 ECU connector.
(b) Turn the power switch ON (IG).
(c) 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 T11, S11*1 and T4*2 ECU connectors.
(b) Disconnect the C10 meter connector.
(c) Measure the resistance of the wire harness side connector.
Standard resistance:





HINT: *1: w/ Smart key system (for door lock)
*2: w/o Smart key system (for door lock)

Result:






C -- REPAIR OR REPLACE HARNESS AND CONNECTOR
B -- REPLACE TIRE PRESSURE WARNING ECU AND REPAIR OR REPLACE HARNESS AND CONNECTOR
A -- REPLACE TIRE PRESSURE WARNING ECU