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 is for main body ECU (multiplex network body ECU)

WIRING DIAGRAM

B004Q2XE29
*a from IG Circuit
*b ECU-IG1 NO. 4
*c Main Body ECU (Multiplex Network Body ECU)
*d Tire Pressure Warning ECU and Receiver

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.

  • Before replacing the main body ECU (multiplex network body ECU), 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 M14 tire pressure warning ECU and receiver connector.

    2. Disconnect the F17 main body ECU (multiplex network body ECU) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      M14-4 (RDA) - F17-4 (RDA) Always Below 1 Ω
      M14-4 (RDA) or F17-4 (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. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      M14-12 (GND) - Body ground Always Below 1 Ω

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      M14-1 (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.

      Tech Tips

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  4. CLEAR DTC


    1. Clear the DTCs.


      Chassis > Tire Pressure Monitor > Clear DTCs
      Result
      Proceed to
      NEXT

    NEXT

  5. CHECK DTC OUTPUT


    1. Turn the power switch off.

    2. Turn the power switch on (IG).

    3. Check for DTCs.


      Chassis > Tire Pressure Monitor > Trouble Codes
      Result
      Result Proceed to
      B1247 is not output A
      B1247 is output B

    A

    END

    B

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