BLOCKING SYSTEM, Diagnostic DTC:B1587

DTC Code DTC Name
B1587 Lost Communication for Immobiliser Communication Circuit

DESCRIPTION

If any of the following conditions occur: 1) the telephone transceiver assembly detects errors in its own communications with the ID code box (immobiliser code ECU); 2) the telephone transceiver assembly detects errors in the communication lines; 3) the ECU communication ID between the ID code box (immobiliser code ECU) and telephone transceiver assembly are different and an engine start is attempted, the telephone transceiver assembly stores DTC B1587.

DTC No. Detection Item DTC Detection Condition Trouble Area
B1587 Lost Communication for Immobiliser Communication Circuit

    Any of the following conditions occur

  • An error in communication between the telephone transceiver assembly and ID code box (immobiliser code ECU)

  • An error in communication lines

  • The communication ID is different during communication with the ID code box (immobiliser code ECU)

  • Telephone transceiver assembly

  • ID code box (immobiliser code ECU)

  • Wire harness or connector

WIRING DIAGRAM

B003W6WE03

CAUTION / NOTICE / HINT

Note


  • Before troubleshooting this DTC, make sure no immobiliser system DTCs are output. If output, troubleshoot the immobiliser system DTCs first.

  • Inspect the fuses for circuits related to this system before performing the following procedure.

  • When replacing the telephone transceiver assembly or ID code box (immobiliser code ECU), refer to Service Bulletin.

  • When the telephone transceiver assembly is replaced, it is necessary to set the contract mode.

Tech Tips


  • When DTC B1587 and B2799 are output simultaneously, perform troubleshooting for DTC B2799 first.

  • After troubleshooting for this DTC, make sure B2799 is not output. If output, troubleshoot the blocking system DTCs next.

PROCEDURE


  1. CHECK FOR DTC


    1. Clear the DTCs.

      Click here


      Body Electrical > Telematics > Clear DTCs

    2. Turn the engine switch off.

    3. Start the engine.

    4. Check for DTCs.

      Click here


      Body Electrical > Telematics > Trouble Codes
      OK
      DTC B1587 is not output.
      Result
      Proceed to
      OK
      NG

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

  2. REGISTER ECU COMMUNICATION ID


    1. Register the ECU communication ID.

      Tech Tips

      Refer to Service Bulletin.

      Result
      Proceed to
      NEXT

    NEXT

  3. CHECK FOR DTC


    1. Clear the DTCs.

      Click here


      Body Electrical > Telematics > Clear DTCs

    2. Turn the engine switch off.

    3. Start the engine.

    4. Check for DTCs.

      Click here


      Body Electrical > Telematics > Trouble Codes
      OK
      DTC B1587 is not output.
      Result
      Proceed to
      OK
      NG

    OK

    END

    NG

  4. CHECK CONNECTION OF CONNECTORS


    1. Turn the engine switch off.

    2. Check that the connectors are properly connected to the telephone transceiver assembly and ID code box (immobiliser code ECU).

      OK
      Connectors are properly connected.
      Result
      Proceed to
      OK
      NG

    NG

    CONNECT CONNECTORS CORRECTLY

    OK

  5. CHECK HARNESS AND CONNECTOR (TELEPHONE TRANSCEIVER ASSEMBLY - ID CODE BOX (IMMOBILISER CODE ECU))


    1. Disconnect the K83 ID code box (immobiliser code ECU) connector.

    2. Disconnect the K76 telephone transceiver assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K76-1 (BLK1) - K83-3 (EFII) Always Below 1 Ω
      K76-1 (BLK1) - Body ground Always 10 kΩ or higher
      K83-3 (EFII) - Body ground Always 10 kΩ or higher
      K76-2 (BLK4) - K83-4 (EFIO) Always Below 1 Ω
      K76-2 (BLK4) - Body ground Always 10 kΩ or higher
      K83-4 (EFIO) - Body ground Always 10 kΩ or higher

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      K76-1 (BLK1) - Body ground Always Below 1 V
      K76-2 (BLK4) - Body ground Always Below 1 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. REPLACE ID CODE BOX (IMMOBILISER CODE ECU)


    1. Temporarily replace the ID code box (immobiliser code ECU) with a new one.

      Tech Tips

      Refer to Service Bulletin.

      Result
      Proceed to
      NEXT

    NEXT

  7. REGISTER ECU COMMUNICATION ID


    1. Reregister the ECU communication ID.

      Tech Tips

      Refer to Service Bulletin.

      Result
      Proceed to
      NEXT

    NEXT

  8. CHECK FOR DTC


    1. Clear the DTCs.

      Click here


      Body Electrical > Telematics > Clear DTCs

    2. Turn the engine switch off.

    3. Start the engine.

    4. Check for DTCs.

      Click here


      Body Electrical > Telematics > Trouble Codes
      OK
      DTC B1587 is not output.
      Result
      Proceed to
      OK
      NG

    OK

    END (ID CODE BOX (IMMOBILISER CODE ECU) WAS DEFECTIVE)

    NG

    REPLACE TELEPHONE TRANSCEIVER ASSEMBLY