BLOCKING SYSTEM, Diagnostic DTC:B1586

DTC Code DTC Name
B1586 Open in Immobiliser Communication Circuit

DESCRIPTION

When the communication line (EFIO - BLK4) between the certification ECU (smart key ECU assembly)*1 or transponder key ECU assembly*2 and telephone transceiver assembly is open, the telephone transceiver assembly stores DTC B1586.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B1586

Open in Immobiliser Communication Circuit

The communication line (EFIO - BLK4) between the certification ECU (smart key ECU assembly)*1 or transponder key ECU assembly*2 and telephone transceiver assembly is open.

  • Telephone transceiver assembly

  • Certification ECU (smart key ECU assembly)*1

  • Transponder key ECU assembly*2

  • Harness or connector

  • *1: w/ Entry and Start System

  • *2: w/o Entry and Start System

WIRING DIAGRAM

B341302E01

CAUTION / NOTICE / HINT

Note:

  • Before troubleshooting for 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 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

PROCEDURE

  1. CHECK FOR DTC

    1. Clear the DTCs.

      Click here

      Body Electrical > Telematics > Clear DTCs

    2. Turn the ignition switch off.

    3. Turn the ignition switch to ON.

    4. After 10 seconds have elapsed, check for DTCs.

      Body Electrical > Telematics > Trouble Codes

    Result

    Proceed to

    DTC B1586 is not output

    Only DTC B1586 is output (w/ Entry and Start System)

    Only DTC B1586 is output (w/o Entry and Start System)

    DTC B1586 and other DTCs are output
    DTC B1586 is not output

    USE SIMULATION METHOD TO CHECK

    Click hereClick hereClick hereClick here

    Only DTC B1586 is output (w/o Entry and Start System)

    CHECK CONNECTION OF CONNECTORSClick here

    DTC B1586 and other DTCs are output

    GO TO DIAGNOSTIC TROUBLE CODE CHART

    Click here

    Only DTC B1586 is output (w/ Entry and Start System)

  2. CHECK CONNECTION OF CONNECTORS

    1. Turn the engine switch off.

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

      OK

      Connectors are properly connected.

    Result

    Proceed to

    OK

    NG
    NG

    CONNECT CONNECTORS CORRECTLY

    OK

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

    1. Disconnect the G58 telephone transceiver assembly connector.

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

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      G58-2 (BLK4) - G82-13 (EFIO)

      Always

      Below 1 Ω

      G58-2 (BLK4) - Body ground

      Always

      10 kΩ or higher

      G82-13 (EFIO) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (OUTPUT)

    1. Reconnect the G58 telephone transceiver assembly connector.

    2. Reconnect the G82 certification ECU (smart key ECU assembly) connector.

    3. Using an oscilloscope, check the waveform.

      Note:

      The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

      B278908C01

      *a

      Component with harness connected

      (Certification ECU [Smart Key ECU Assembly])

      *b

      Approximately 160 ms

      *c

      Approximately 270 ms

      -

      -
      Table 1. Measurement Condition

      Tester Connection

      Content

      Tester Connection

      G82-13 (EFIO) - G82-11 (E)

      Tool Setting

      2 V/DIV., 500 ms./DIV.

      Condition

      Check waveform within 3 seconds of starter operation and initial combustion, or within 3 seconds of engine switch first being turned on (IG) after cable disconnected and reconnected to negative (-) battery terminal

      OK

      The waveform is output normally (refer to illustration).

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE TELEPHONE TRANSCEIVER ASSEMBLY

    NG

  5. CHECK HARNESS AND CONNECTOR (TELEPHONE TRANSCEIVER ASSEMBLY - BATTERY AND BODY GROUND)

    1. B263444N01

      Disconnect the G58 telephone transceiver assembly connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      G58-9 (E) - Body ground

      Always

      Below 1 Ω

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      G58-12 (+B) - Body ground

      Always

      11 to 14 V

      G58-6 (IG2) - Body ground

      Engine switch off

      Below 1 V

      G58-6 (IG2) - Body ground

      Engine switch on (IG)

      11 to 14 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.

      Tip:

      Refer to the Service Bulletin.

    Result

    Proceed to

    NEXT
    NEXT

  7. PERFORM REGISTRATION

    1. Perform the registration.

      Tip:

      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 on (IG).

    3. After 10 seconds have elapsed, check for DTCs.

      Body Electrical > Telematics > Trouble Codes

      OK

      DTC B1586 is not output.

    Result

    Proceed to

    DTC B1586 is not output

    DTC B1586 is output
    DTC B1586 is not output

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

    DTC B1586 is output

    REPLACE TELEPHONE TRANSCEIVER ASSEMBLY

  9. CHECK CONNECTION OF CONNECTORS

    1. Turn the ignition switch off.

    2. Check that the connectors are properly connected to the telephone transceiver assembly and transponder key ECU assembly.

      OK

      Connectors are properly connected.

    Result

    Proceed to

    OK

    NG
    NG

    CONNECT CONNECTORS CORRECTLY

    OK

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

    1. Disconnect the G58 telephone transceiver assembly connector.

    2. Disconnect the G88 transponder key ECU assembly connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      G58-2 (BLK4) - G88-13 (EFIO)

      Always

      Below 1 Ω

      G58-2 (BLK4) - Body ground

      Always

      10 kΩ or higher

      G88-13 (EFIO) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  11. CHECK TRANSPONDER KEY ECU ASSEMBLY (OUTPUT)

    1. Reconnect the G58 telephone transceiver assembly connector.

    2. Reconnect the G88 transponder key ECU assembly connector.

    3. Using an oscilloscope, check the waveform.

      Note:

      The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

      B341223C02

      *a

      Component with harness connected

      (Transponder Key ECU Assembly)

      *b

      Approximately 160 ms

      *c

      Approximately 270 ms

      -

      -
      Table 2. Measurement Condition

      Tester Connection

      Content

      Tester Connection

      G88-13 (EFIO) - G88-5 (E)

      Tool Setting

      2 V/DIV., 500 ms./DIV.

      Condition

      Check waveform within 3 seconds of starter operation and initial combustion, or within 3 seconds of ignition switch first being turned to ON after cable disconnected and reconnected to negative (-) battery terminal

      OK

      The waveform is output normally (refer to illustration).

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE TELEPHONE TRANSCEIVER ASSEMBLY

    NG

  12. CHECK HARNESS AND CONNECTOR (TELEPHONE TRANSCEIVER ASSEMBLY - BATTERY AND BODY GROUND)

    1. B263444N01

      Disconnect the G58 telephone transceiver assembly connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      G58-9 (E) - Body ground

      Always

      Below 1 Ω

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      G58-12 (+B) - Body ground

      Always

      11 to 14 V

      G58-6 (IG2) - Body ground

      Ignition switch off

      Below 1 V

      G58-6 (IG2) - Body ground

      Ignition switch ON

      11 to 14 V

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  13. REPLACE TRANSPONDER KEY ECU ASSEMBLY

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

      Tip:

      Refer to the Service Bulletin.

    Result

    Proceed to

    NEXT
    NEXT

  14. PERFORM REGISTRATION

    1. Perform the registration.

      Tip:

      Refer to the Service Bulletin.

    Result

    Proceed to

    NEXT
    NEXT

  15. CHECK FOR DTC

    1. Clear the DTCs.

      Click here

      Body Electrical > Telematics > Clear DTCs

    2. Turn the ignition switch to ON.

    3. After 10 seconds have elapsed, check for DTCs.

      Body Electrical > Telematics > Trouble Codes

      OK

      DTC B1586 is not output.

    Result

    Proceed to

    DTC B1586 is not output

    DTC B1586 is output
    DTC B1586 is not output

    END (TRANSPONDER KEY ECU ASSEMBLY WAS DEFECTIVE)

    DTC B1586 is output

    REPLACE TELEPHONE TRANSCEIVER ASSEMBLY