BLOCKING SYSTEM, Diagnostic DTC:B1586

DTC Code DTC Name
B1586 Open in Immobiliser Communication Circuit

DESCRIPTION

If the communication line (EFIO - BLK4) between the ID code box (immobiliser code ECU) 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 An open communication line (EFIO - BLK4) between the ID code box (immobiliser code ECU) and telephone transceiver assembly is detected.

  • 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.

PROCEDURE


  1. CHECK FOR DTC


    1. Clear the DTCs.

      Click here


      Body Electrical > Telematics > Clear DTCs

    2. Turn the engine switch off.

    3. Turn the engine switch on (IG).

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


      Body Electrical > Telematics > Trouble Codes
      Result
      Result Proceed to
      DTCs are not output A
      Only DTC B1586 is output B
      DTC B1586 and other DTCs are output C

    A

    USE SIMULATION METHOD TO CHECK Click here

    C

    GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

    B

  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 ID code box (immobiliser code ECU).

      OK
      Connectors are properly connected.
      Result
      Proceed to
      OK
      NG

    NG

    CONNECT CONNECTORS CORRECTLY

    OK

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


    1. Disconnect the K76 telephone transceiver assembly connector.

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      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
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK ID CODE BOX (IMMOBILISER CODE ECU) OUTPUT


    1. Reconnect the K76 telephone transceiver assembly connector.

    2. Reconnect the K83 ID code box (immobiliser code ECU) 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.

      B003UUOC01
      *a

      Component with harness connected

      (ID Code Box (Immobiliser Code ECU))

      		 *b Approximately 160 ms
      *c Approximately 270 ms - -
      Measurement Condition
      Tester Connection Content
      Tester Connection K83-4 (EFIO) - K83-5 (GND)
      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).
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE TELEPHONE TRANSCEIVER ASSEMBLY

    NG

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


    1. Disconnect the K76 telephone transceiver assembly connector.

    2. B003WL9C03
      *a

      Front view of wire harness connector

      (to Telephone Transceiver Assembly)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      K76-12 (+B) - Body ground Always 9 to 16 V
      K76-6 (IG2) - Body ground Engine switch off Below 1 V
      K76-6 (IG2) - Body ground Engine switch on (IG) 9 to 16 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K76-9 (E) - Body ground Always Below 1 Ω
      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. PERFORM REGISTRATION


    1. Perform registration.

      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. Turn the engine switch on (IG).

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


      Body Electrical > Telematics > Trouble Codes
      OK
      DTC B1586 is not output.
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPLACE TELEPHONE TRANSCEIVER ASSEMBLY