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. Detection Item DTC Detection Condition Trouble Area Note
B1247 Tire Pressure Monitor Receiver Communication Stop 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)

 This DTC for main body ECU (multiplex network body ECU)

WIRING DIAGRAM

A011QBZE06

CAUTION / NOTICE / HINT

Note


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

  • It is necessary to perform initialization 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 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 Q38 or Q36 tire pressure warning ECU and receiver connector.

    2. Disconnect the K2 main body ECU (multiplex network body ECU) connector.

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

      Standard Resistance
      for FMVSS138 Type
      Tester Connection Condition Specified Condition
      Q38-4 (RDA) - K2-4 (RDA) Always Below 1 Ω
      Q38-4 (RDA) or K2-4 (RDA) - Body ground Always 10 kΩ or higher
      for ECE-R64 Type
      Tester Connection Condition Specified Condition
      Q36-4 (RDA2) - K2-4 (RDA) Always Below 1 Ω
      Q36-4 (RDA2) or K2-4 (RDA) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. A01D03ZC18
      *A for FMVSS138 Type
      *B for ECE-R64 Type
      *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
      for FMVSS138 Type
      Tester Connection Condition Specified Condition
      Q38-12 (GND) - Body ground Always Below 1 Ω
      for ECE-R64 Type
      Tester Connection Condition Specified Condition
      Q36-12 (GND) - Body ground Always Below 1 Ω

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

      Standard Voltage
      for FMVSS138 Type
      Tester Connection Condition Specified Condition
      Q38-1 (IG) - Body ground Power switch on (IG) 10 to 16 V
      for ECE-R64 Type
      Tester Connection Condition Specified Condition
      Q36-1 (IG) - Body ground Power switch on (IG) 10 to 16 V
      Result
      Proceed to
      OK
      NG

    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

      Result
      Proceed to
      NEXT

    NEXT

  4. CHECK DTC OUTPUT


    1. Clear the DTCs.

      Click here


      Chassis > Tire Pressure Monitor > Clear DTCs

    2. Turn the power switch off.

    3. Turn the power switch on (IG).

    4. Check for DTCs.

      Click here


      Chassis > Tire Pressure Monitor > Trouble Codes
      OK
      DTC B1247 is not output.
      Result
      Proceed to
      OK
      NG

    OK

    END

    NG

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