B1247

TIRE PRESSURE MONITORING: TIRE PRESSURE WARNING SYSTEM: B1247: Tire Pressure Monitor Receiver Communication Stop
B1247 - Tire Pressure Monitor Receiver Communication Stop

DESCRIPTION

The main body ECU (multiplex network body ECU) and tire pressure warning ECU and receiver are connected using 2 direct lines that they use to communicate with each other.





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
* When replacing the tire pressure warning ECU and receiver, read the IDs stored in the old ECU using the Techstream and write them down before removal.
* It is necessary to perform initialization Initialization after registration Registration of the transmitter IDs into the tire pressure warning ECU and receiver after the ECU has been replaced.
* When replacing the tire pressure warning ECU and receiver on vehicles equipped with the wireless door lock control system (w/o smart key system), be sure to perform Registration of Recognition Code to register the transmitter IDs after ECU replacement Registration.

HINT
Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) - TIRE PRESSURE WARNING ECU AND RECEIVER)

(a) Disconnect the tire pressure warning ECU and receiver O25 or O33 connector and main body ECU (multiplex network body ECU) I13 connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





*1: w/ Wireless Door Lock Control System

*2: w/o Wireless Door Lock Control System

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (POWER SOURCE OF TIRE PRESSURE WARNING ECU AND RECEIVER)

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





*1: w/ Wireless Door Lock Control System

*2: w/o Wireless Door Lock Control System

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:





*1: w/ Wireless Door Lock Control System

*2: w/o Wireless Door Lock Control System

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

3. REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER

(a) Replace the tire pressure warning ECU and receiver Removal.

NEXT -- Continue to next step.

4. CHECK DTC OUTPUT (B1247)

(a) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.

(b) Turn the ignition switch off.

(c) Turn the ignition switch to ON.

(d) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.

OK:

DTC B1247 is not output.

NG -- REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Removal

OK -- END