TIRE PRESSURE WARNING SYSTEM, Diagnostic DTC:B1247

DTC Code DTC Name
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.

DTC No. DTC Detection Condition Trouble Area
B1247 In diagnostic mode, an applicable RDA signal cannot be received within 2.4 seconds after a PRG signal is sent from the main body ECU (multiplex network body ECU).

  • Tire pressure warning ECU and receiver

  • Wire harness or connector

  • Main body ECU (multiplex network body ECU)

WIRING DIAGRAM

A01HMGBE11

INSPECTION PROCEDURE

Note


  • 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 registration Click here 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 Click here.

Tech Tips

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)


    1. Disconnect the tire pressure warning ECU and receiver O25, O33 or N41 connector and main body ECU (multiplex network body ECU) I13 connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition

      O25-4 (RDA) - I13-16 (RDA)*1

      O33-4 (RDA) - I13-16 (RDA)*2

      N41-4 (RDA) - I13-16 (RDA)*3

      		 Always Below 1 Ω
      I13-16 (RDA) - Body ground Always 10 kΩ or higher

      • *1: w/o Intuitive Parking Assist System with Wireless Door Lock Control System

      • *2: w/o Intuitive Parking Assist System without Wireless Door Lock Control System

      • *3: w/ Intuitive Parking Assist System


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


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

      Standard Resistance
      Tester Connection Condition Specified Condition

      O25-12 (GND) - Body ground*1

      O33-12 (GND) - Body ground*2

      N41-12 (GND) - Body ground*3

      		 Always Below 1 Ω

      • *1: w/o Intuitive Parking Assist System with Wireless Door Lock Control System

      • *2: w/o Intuitive Parking Assist System without Wireless Door Lock Control System

      • *3: w/ Intuitive Parking Assist System

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

      Standard Voltage
      Tester Connection Condition Specified Condition

      O25-1 (IG) - Body ground*1

      O33-1 (IG) - Body ground*2

      N41-1 (IG) - Body ground*3

      		 Ignition switch ON 10 to 16 V

      • *1: w/o Intuitive Parking Assist System with Wireless Door Lock Control System

      • *2: w/o Intuitive Parking Assist System without Wireless Door Lock Control System

      • *3: w/ Intuitive Parking Assist System


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER


    1. Replace the tire pressure warning ECU and receiver Click here.


    NEXT

  4. CHECK DTC OUTPUT (B1247)


    1. Clear the DTCs Click here.

    2. Turn the ignition switch off.

    3. Turn the ignition switch to ON.

    4. Check for DTCs Click here.

      OK
      DTC B1247 is not output.

    NG

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

    OK

    END