BLOCKING SYSTEM, Diagnostic DTC:B1587

DTC Code DTC Name
B1587 Lost Communication for Immobiliser Communication Circuit

DESCRIPTION

When one of the following occurs: 1) the telephone transceiver assembly detects errors in its own communications with the certification ECU (smart key ECU assembly)*1 or transponder key ECU assembly*2, 2) the telephone transceiver assembly detects errors in the communication lines, or 3) the ECU communication ID between the certification ECU (smart key ECU assembly)*1 or transponder key ECU assembly*2 and telephone transceiver assembly is 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

    Either condition is met:

  • An error in communication between the telephone transceiver assembly and certification ECU (smart key ECU assembly)*1 or transponder key ECU assembly*2

  • An error in communication lines

  • The communication ID is different during communication with the certification ECU (smart key ECU assembly)*1 or transponder key ECU assembly*2

  • Telephone transceiver assembly

  • Certification ECU (smart key ECU assembly)*1

  • Transponder key ECU assembly*2

  • Harness or connector

WIRING DIAGRAM

A01KBGLE01

CAUTION / NOTICE / HINT

Note


  • Before troubleshooting for these DTCs, 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 inspection procedure.

  • When replacing the telephone transceiver assembly, certification ECU (smart key ECU assembly)*1 or transponder key ECU assembly*2, refer to the Service Bulletin.

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


  • *1: w/ Entry and Start System

  • *2: w/o Entry and Start System

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 ignition switch off.

    3. Start the engine.

    4. Check for DTCs.

      Click here


      Body Electrical > Telematics > Clear DTCs
      Result
      Proceed to
      DTC B1587 is not output
      DTC B1587 is output

    DTC B1587 is not output

    USE SIMULATION METHOD TO CHECK Click here

    DTC B1587 is output

  2. PERFORM ECU COMMUNICATION ID


    1. Reregister the ECU communication ID.

      Tech Tips

      Refer to the 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 ignition switch off.

    3. Start the engine.

    4. Check for DTCs.

      Click here


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

    DTC B1587 is not output

    END

    DTC B1587 is output

  4. CHECK CONNECTION OF CONNECTORS


    1. Turn the ignition switch off.

    2. Check that the connectors are properly connected to the telephone transceiver assembly and certification ECU (smart key ECU assembly)*1 or transponder key ECU assembly*2.


      • *1: w/ Entry and Start System

      • *2: w/o Entry and Start System

      OK
      Connectors are properly connected.
      Result
      Proceed to
      OK (w/ Entry and Start System)
      OK (w/o Entry and Start System)
      NG

    OK (w/o Entry and Start System)

    CHECK HARNESS AND CONNECTOR (TELEPHONE TRANSCEIVER ASSEMBLY - TRANSPONDER KEY ECU ASSEMBLY) Click here

    NG

    CONNECT CONNECTORS CORRECTLY

    OK (w/ Entry and Start System)

  5. CHECK HARNESS AND CONNECTOR (TELEPHONE TRANSCEIVER ASSEMBLY - CERTIFICATION ECU [SMART KEY ECU ASSEMBLY])


    1. Disconnect the G82 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the G58 telephone transceiver assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G58-1 (BLK1) - G82-14 (EFII) Always Below 1 Ω
      G58-1 (BLK1) or G82-14 (EFII) - Body ground Always 10 kΩ or higher
      G58-2 (BLK4) - G82-13 (EFIO) Always Below 1 Ω
      G58-2 (BLK4) or G82-13 (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
      G58-1 (BLK1) - Body ground Always Below 1 V
      G58-2 (BLK4) - Body ground Always Below 1 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


    1. Replace the certification ECU (smart key ECU assembly) with a new one.

      Tech Tips

      Refer to the Service Bulletin.

      Result
      Proceed to
      NEXT

    NEXT

  7. REGISTER ECU COMMUNICATION ID


    1. Register the ECU communication ID.

      Tech Tips

      Refer to the 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
      Result
      Proceed to
      DTC B1587 is not output
      DTC B1587 is output

    DTC B1587 is not output

    END (CERTIFICATION ECU [SMART KEY ECU ASSEMBLY] WAS DEFECTIVE)

    DTC B1587 is output

    REPLACE TELEPHONE TRANSCEIVER ASSEMBLY

  9. CHECK HARNESS AND CONNECTOR (TELEPHONE TRANSCEIVER ASSEMBLY - TRANSPONDER KEY ECU ASSEMBLY)


    1. Disconnect the G88 transponder key ECU assembly connector.

    2. Disconnect the G58 telephone transceiver assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G58-1 (BLK1) - G88-12 (EFII) Always Below 1 Ω
      G58-1 (BLK1) or G88-12 (EFII) - Body ground Always 10 kΩ or higher
      G58-2 (BLK4) - G88-13 (EFIO) Always Below 1 Ω
      G58-2 (BLK4) or G88-13 (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
      G58-1 (BLK1) - Body ground Always Below 1 V
      G58-2 (BLK4) - Body ground Always Below 1 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  10. REPLACE TRANSPONDER KEY ECU ASSEMBLY


    1. Replace the transponder key ECU assembly with a new one.

      Tech Tips

      Refer to the Service Bulletin.

      Result
      Proceed to
      NEXT

    NEXT

  11. REGISTER ECU COMMUNICATION ID


    1. Register the ECU communication ID.

      Tech Tips

      Refer to the Service Bulletin.

      Result
      Proceed to
      NEXT

    NEXT

  12. CHECK FOR DTC


    1. Clear the DTCs.

      Click here


      Body Electrical > Telematics > Clear DTCs

    2. Turn the ignition switch off.

    3. Start the engine.

    4. Check for DTCs.

      Click here


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

    DTC B1587 is not output

    END (TRANSPONDER KEY ECU ASSEMBLY WAS DEFECTIVE)

    DTC B1587 is output

    REPLACE TELEPHONE TRANSCEIVER ASSEMBLY