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

  • Harness or connector

  • Main body ECU (multiplex network body ECU)

  • ECU-IG NO.1 FUSE

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

WIRING DIAGRAM

B002KA3E11

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 P11*1 or Q46*2 tire pressure warning ECU and receiver connector.


      • *1: except AYZ10R-AWXLBQ or AYZ15R-AWXLBQ Deck Floor Box LH without Compact Spare Tire Caution Label

      • *2: for AYZ10R-AWXLBQ or AYZ15R-AWXLBQ Deck Floor Box LH without Compact Spare Tire Caution Label

    2. Disconnect the I48 main body ECU (multiplex network body ECU) connector.

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

      Standard Resistance
      except AYZ10R-AWXLBQ or AYZ15R-AWXLBQ Deck Floor Box LH without Compact Spare Tire Caution Label
      Tester Connection Condition Specified Condition
      P11-4 (RDA) - I48-4 (RDA) Always Below 1 Ω
      P11-4 (RDA) or I48-4 (RDA) - Body ground Always 10 kΩ or higher
      for AYZ10R-AWXLBQ or AYZ15R-AWXLBQ Deck Floor Box LH without Compact Spare Tire Caution Label
      Tester Connection Condition Specified Condition
      Q46-4 (RDA2) - I48-4 (RDA) Always Below 1 Ω
      Q46-4 (RDA2) or I48-4 (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. B002KANC35
      *A except AYZ10R-AWXLBQ or AYZ15R-AWXLBQ Deck Floor Box LH without Compact Spare Tire Caution Label
      *B for AYZ10R-AWXLBQ or AYZ15R-AWXLBQ Deck Floor Box LH without Compact Spare Tire Caution Label
      *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 AYZ10R-AWXLBQ or AYZ15R-AWXLBQ Deck Floor Box LH without Compact Spare Tire Caution Label
      Tester Connection Condition Specified Condition
      P11-12 (GND) - Body ground Always Below 1 Ω
      for AYZ10R-AWXLBQ or AYZ15R-AWXLBQ Deck Floor Box LH without Compact Spare Tire Caution Label
      Tester Connection Condition Specified Condition
      Q46-12 (GND) - Body ground Always Below 1 Ω

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

      Standard Voltage
      except AYZ10R-AWXLBQ or AYZ15R-AWXLBQ Deck Floor Box LH without Compact Spare Tire Caution Label
      Tester Connection Condition Specified Condition
      P11-1 (IG) - Body ground Power switch on (IG) 10 to 16 V
      for AYZ10R-AWXLBQ or AYZ15R-AWXLBQ Deck Floor Box LH without Compact Spare Tire Caution Label
      Tester Connection Condition Specified Condition
      Q46-1 (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 (except AYZ10R-AWXLBQ or AYZ15R-AWXLBQ Deck Floor Box LH without Compact Spare Tire Caution Label: Click here, for AYZ10R-AWXLBQ or AYZ15R-AWXLBQ Deck Floor Box LH without Compact Spare Tire Caution Label: Click here.

      Result
      Proceed to
      NEXT

    NEXT

  4. CHECK DTC OUTPUT


    1. Clear the DTCs.

      Click here


      Body Electrical > Main Body > Clear DTCs

    2. Turn the power switch off.

    3. Turn the power switch on (IG).

    4. Check for DTCs.

      Click here


      Body Electrical > Main Body > Trouble Codes
      OK
      DTC B1247 is not output.
      Result
      Proceed to
      OK
      NG

    OK

    END

    NG

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) for LHD: Click here
    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) for RHD: Click here