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 10 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

A01FRWOE04

INSPECTION PROCEDURE

Note


  • When replacing the tire pressure warning ECU and receiver, read the IDs stored in the old ECU using the GTS and write them down before removal.

  • It is necessary to perform initialization Click here after registration Click here of the transmitter IDs into the tire pressure warning ECU and receiver after the ECU has been replaced.

  • If the main body ECU (multiplex network body ECU) is replaced, refer to the Service Bulletin.

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 T32 or U22 connector and main body ECU (multiplex network body ECU) N12 connector.

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

      Standard Resistance
      except AWL10R-BEXQHQ and GWL10R-BEXQBQ
      Tester Connection Condition Specified Condition
      T32-4 (RDA) - N12-16 (RDA) Always Below 1 Ω
      N12-16 (RDA) - Body ground Always 10 kΩ or higher
      for AWL10R-BEXQHQ and GWL10R-BEXQBQ
      Tester Connection Condition Specified Condition
      U22-4 (RDA2) - N12-16 (RDA) Always Below 1 Ω
      N12-16 (RDA) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. A01FV24E04
      Text in Illustration
      *A except AWL10R-BEXQHQ and GWL10R-BEXQBQ
      *B for AWL10R-BEXQHQ and GWL10R-BEXQBQ
      *a

      Front view of wire harness connector

      (to Tire Pressure Warning ECU and Receiver)

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

      Standard Resistance
      except AWL10R-BEXQHQ and GWL10R-BEXQBQ
      Tester Connection Condition Specified Condition
      T32-12 (GND) - Body ground Always Below 1 Ω
      for AWL10R-BEXQHQ and GWL10R-BEXQBQ
      Tester Connection Condition Specified Condition
      U22-12 (GND) - Body ground Always Below 1 Ω

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

      Standard Voltage
      except AWL10R-BEXQHQ and GWL10R-BEXQBQ
      Tester Connection Switch Condition Specified Condition
      T32-1 (IG) - Body ground Power switch on (IG) 10 to 16 V
      for AWL10R-BEXQHQ and GWL10R-BEXQBQ
      Tester Connection Switch Condition Specified Condition
      U22-1 (IG) - Body ground Power switch on (IG) 10 to 16 V

    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 (except AWL10R-BEXQHQ and GWL10R-BEXQBQ: Click here, for AWL10R-BEXQHQ and GWL10R-BEXQBQ: Click here.


    NEXT

  4. CHECK DTC OUTPUT (B1247)


    1. Clear the DTCs Click here.

    2. Turn the power switch off.

    3. Turn the power switch on (IG).

    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