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

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)

  • ECU-IG NO. 2 fuse*1

  • Backup boost converter circuit*2

  • *1: w/o Stop and Start System

  • *2: w/ Stop and Start System

WIRING DIAGRAM

C279316E12

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 (Click here) after registration (Click here) of the transmitter IDs into the tire pressure warning ECU and receiver after the ECU has been replaced.

  • When replacing the main body ECU (multiplex network body ECU), make sure to replace it with a new one.

Tip:

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 tire pressure warning ECU and receiver M11*1, *3 or M30*2 connector and main body ECU (multiplex network body ECU) G78 connector.

      • *1: for Air Bag Caution Label with "9L" Identification Mark

      • *2: except Air Bag Caution Label with "9L" Identification Mark for ECE-R64 Type

      • *3: except Air Bag Caution Label with "9L" Identification Mark for FMVSS138 Type

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

      Standard Resistance

      Table 1. for Air Bag Caution Label with "9L" Identification Mark, except Air Bag Caution Label with "9L" Identification Mark for FMVSS138 Type

      Tester Connection

      Condition

      Specified Condition

      M11-4 (RDA) - G78-16 (RDA)

      Always

      Below 1 Ω

      M11-4 (RDA) or G78-16 (RDA) - Body ground

      Always

      10 kΩ or higher
      Table 2. except Air Bag Caution Label with "9L" Identification Mark for ECE-R64 Type

      Tester Connection

      Condition

      Specified Condition

      M30-4 (RDA2) - G78-16 (RDA)

      Always

      Below 1 Ω

      M30-4 (RDA2) or G78-16 (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. Disconnect the tire pressure warning ECU and receiver M11*1, *3 or M30*2 connector.

      • *1: for Air Bag Caution Label with "9L" Identification Mark

      • *2: except Air Bag Caution Label with "9L" Identification Mark for ECE-R64 Type

      • *3: except Air Bag Caution Label with "9L" Identification Mark for FMVSS138 Type

    2. E198671C32

      *A

      for Air Bag Caution Label with "9L" Identification Mark

      *B

      except Air Bag Caution Label with "9L" Identification Mark for ECE-R64 Type

      *C

      except Air Bag Caution Label with "9L" Identification Mark for FMVSS138 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

      Table 3. for Air Bag Caution Label with "9L" Identification Mark, except Air Bag Caution Label with "9L" Identification Mark for FMVSS138 Type

      Tester Connection

      Condition

      Specified Condition

      M11-12 (E) - Body ground

      Always

      Below 1 Ω
      Table 4. except Air Bag Caution Label with "9L" Identification Mark for ECE-R64 Type

      Tester Connection

      Condition

      Specified Condition

      M30-12 (GND) - Body ground

      Always

      Below 1 Ω

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

      Standard Voltage

      Table 5. for Air Bag Caution Label with "9L" Identification Mark, except Air Bag Caution Label with "9L" Identification Mark for FMVSS138 Type

      Tester Connection

      Switch Condition

      Specified Condition

      M11-1 (IG) - Body ground

      Ignition switch ON

      10 to 16 V
      Table 6. except Air Bag Caution Label with "9L" Identification Mark for ECE-R64 Type

      Tester Connection

      Switch Condition

      Specified Condition

      M30-1 (IG) - Body ground

      Ignition switch ON

      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)

    for 2WW:Click here

    for 3ZR-FAE:Click here

    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 (B1247)

    1. Clear the DTCs.

      Click here

      Body Electrical > Main Body > Clear DTCs

    2. Turn the ignition switch off.

    3. Turn the ignition switch to ON.

    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

    for RHD:Click here