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 assembly (smart key ECU assembly) and telephone transceiver assembly is open, the telephone transceiver assembly stores DTC B1586.

DTC Code DTC Detection Condition Trouble Area
B1586 The communication line (EFIO - BLK4) between the certification ECU assembly (smart key ECU assembly) and telephone transceiver assembly is open.

  • Telephone transceiver assembly

  • Certification ECU assembly (smart key ECU assembly)

  • Wire harness or connector

WIRING DIAGRAM

A01EVVWE01

INSPECTION PROCEDURE

Note


  • Before troubleshooting for this DTC, make sure no engine immobiliser system DTCs are present. If present, troubleshoot the engine 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 or certification ECU (smart key ECU assembly), refer to the Service Bulletin.

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

PROCEDURE


  1. CHECK DTC OUTPUT


    1. Clear the DTCs Click here.

    2. Turn the engine switch off.

    3. Turn the engine switch on (IG).

    4. After 6 seconds have elapsed, check for DTCs.

      Result
      Result Proceed to
      DTC is not output. A
      Only DTC B1586 is output. B
      DTC B1586 and other DTCs are output. C

    B

    CHECK CONNECTION OF CONNECTOR Click here

    C

    GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

    A

    USE SIMULATION METHOD TO CHECK Click here

  2. CHECK CONNECTION OF CONNECTOR


    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.

    NG

    CONNECT CONNECTOR CORRECTLY

    OK

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


    1. Disconnect the I70 telephone transceiver assembly connector.

    2. Disconnect the A43 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
      I70-2 (BLK4) - A43-13 (EFIO) Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Reconnect the I70 telephone transceiver assembly connector.

    2. Reconnect the A43 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.

      A01EY94E02
      Text in Illustration
      *a

      Component with harness connected

      (Certification ECU (Smart Key ECU Assembly))

      		 *b Approximately 160 ms
      *c Approximately 270 ms - -
      Measurement Condition
      Item Content
      Tester Connection A43-13 (EFIO) - A43-11 (E)
      Tool Setting 2 V/DIV., 500 ms./DIV.
      Condition Within 3 seconds of engine start or within 3 seconds of engine switch turned on (IG) after battery cable disconnected and reconnected
      OK
      The waveform is output normally (refer to illustration).

    NG

    CHECK HARNESS AND CONNECTOR (TELEPHONE TRANSCEIVER ASSEMBLY - BATTERY AND BODY GROUND) Click here

    OK

    REPLACE TELEPHONE TRANSCEIVER ASSEMBLY

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


    1. Disconnect the I70 telephone transceiver assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      I70-12 (+B) - Body ground Always 11 to 14 V
      I70-6 (IG2) - Body ground Engine switch off Below 1 V
      I70-6 (IG2) - Body ground Engine switch on (IG) 11 to 14 V
      Standard Resistance
      Tester Connection Condition Specified Condition
      I70-9 (E) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


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

      Tech Tips

      Refer to the Service Bulletin.


    NEXT

  7. PERFORM REGISTRATION


    1. Perform the registration.

      Tech Tips

      Refer to the Service Bulletin.


    NEXT

  8. CHECK DTC OUTPUT


    1. Clear the DTCs Click here.

    2. Turn the engine switch off.

    3. Turn the engine switch on (IG).

    4. After 6 seconds have elapsed, check for DTCs.

      OK
      DTC B1586 is not output.

    NG

    REPLACE TELEPHONE TRANSCEIVER ASSEMBLY

    OK

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