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*1

  • Backup boost converter circuit*2

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

WIRING DIAGRAM

B005AGCE03

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.

    Click here

  • 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 the Service Bulletin.

  • As the door control battery is installed between the vehicle battery and main body ECU (multiplex network body ECU), first perform the inspections in On-Vehicle Inspection to confirm that there are no malfunctions in the power source circuit for the main body ECU (multiplex network body ECU) before performing this troubleshooting procedure.*

    *: w/ Rear Pretensioner

Tech Tips

w/o Stop and Start System:

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 AGZ10R-AWTLTQ or AGZ15R-AWTLTQ Deck Floor Box LH without Compact Spare Tire Caution Label

      • *2: for AGZ10R-AWTLTQ or AGZ15R-AWTLTQ 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 AGZ10R-AWTLTQ or AGZ15R-AWTLTQ 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 AGZ10R-AWTLTQ or AGZ15R-AWTLTQ 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. B005BANC35
      *A except AGZ10R-AWTLTQ or AGZ15R-AWTLTQ Deck Floor Box LH without Compact Spare Tire Caution Label
      *B for AGZ10R-AWTLTQ or AGZ15R-AWTLTQ 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 AGZ10R-AWTLTQ or AGZ15R-AWTLTQ 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 AGZ10R-AWTLTQ or AGZ15R-AWTLTQ 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 AGZ10R-AWTLTQ or AGZ15R-AWTLTQ Deck Floor Box LH without Compact Spare Tire Caution Label
      Tester Connection Condition Specified Condition
      P11-1 (IG) - Body ground Engine switch on (IG) 10 to 16 V
      for AGZ10R-AWTLTQ or AGZ15R-AWTLTQ Deck Floor Box LH without Compact Spare Tire Caution Label
      Tester Connection Condition Specified Condition
      Q46-1 (IG) - Body ground Engine switch on (IG) 10 to 16 V
      Result
      Proceed to
      OK
      NG (w/o Stop and Start System)
      NG (w/ Stop and Start System)

    NG (w/o Stop and Start System)

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    NG (w/ Stop and Start System)

    INSPECT STOP AND START SYSTEM (BACKUP BOOST CONVERTER CIRCUIT) Click here

    OK

  3. REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER


    1. Replace the tire pressure warning ECU and receiver.

      except AGZ10R-AWTLTQ or AGZ15R-AWTLTQ Deck Floor Box LH without Compact Spare Tire Caution Label: Click here

      for AGZ10R-AWTLTQ or AGZ15R-AWTLTQ 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 engine switch off.

    3. Turn the engine 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