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

A01X58PE24

CAUTION / NOTICE / HINT

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 (See page ) 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. Turn the engine switch off.

    2. Disconnect the L65*1 or L75*2 tire pressure warning ECU and receiver connector.


      • *1: w/o Front Antenna

      • *2: w/ Front Antenna

    3. Disconnect the E118 main body ECU (multiplex network body ECU) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition

      L65-4 (RDA) - E118-4 (RDA)*1

      L75-4 (RDA2) - E118-4 (RDA)*2

      		 Always Below 1 Ω

      L65-4 (RDA) or E118-4 (RDA) - Body ground*1

      L75-4 (RDA2) or E118-4 (RDA) - Body ground*2

      		 Always 10 kΩ or higher

      • *1: w/o Front Antenna

      • *2: w/ Front Antenna


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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

    A01X5ZXE02
    Text in Illustration
    *A w/o Front Antenna
    *B w/ Front Antenna
    *a

    Front view of wire harness connector

    (to 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

      L65-12 (GND) - Body ground*1

      L75-12 (GND) - Body ground*2

      		 Always Below 1 Ω

      • *1: w/o Front Antenna

      • *2: w/ Front Antenna

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

      Standard Voltage
      Tester Connection Condition Specified Condition

      L65-1 (IG) - Body ground*1

      L75-1 (IG) - Body ground*2

      		 Engine switch on (IG) 10 to 16 V

      • *1: w/o Front Antenna

      • *2: w/ Front Antenna


    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 engine switch off.

    3. Turn the engine switch on (IG).

    4. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC B1247 is not output. A
      DTC B1247 is output. for LHD B
      for RHD C

    A

    END

    B

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

    C

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