BLOCKING SYSTEM, Diagnostic DTC:B1586

DTC Code DTC Name
B1586 Open in Immobiliser Communication Circuit

DESCRIPTION

When 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 Code DTC Detection Condition Trouble Area
B1586 The communication line (EFIO - BLK4) between the ID code box (immobiliser code ECU) and telephone transceiver assembly is open.

  • Telephone transceiver assembly

  • ID code box (immobiliser code ECU)

  • Wire harness or connector

WIRING DIAGRAM

A01JCDYE10

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 ID code box (immobiliser code ECU), 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 power switch off.

    3. Turn the power 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 power 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.

    NG

    CONNECT CONNECTOR CORRECTLY

    OK

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


    1. Disconnect the L156 telephone transceiver assembly connector.

    2. Disconnect the L10 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
      L156-2 (BLK4) - L10-6 (EFIO) Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Reconnect the L156 telephone transceiver assembly connector.

    2. Reconnect the L10 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.

      A01JC5PE03
      Text in Illustration
      *a

      Component with harness connected

      (ID Code Box (Immobiliser Code ECU))

      		 *b Approximately 160 ms
      *c Approximately 510 ms - -
      Measurement Condition
      Item Content
      Tester Connection L10-6 (EFIO) - L10-8 (GND)
      Tool Setting 2 V/DIV., 500 ms./DIV.
      Condition Within 3 seconds of power switch on (READY), or within 3 seconds of power switch turned on (IG) after auxiliary battery cable disconnected and reconnected
      OK
      The waveform is output normally (refer to illustration).

    NG

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

    OK

    REPLACE TELEPHONE TRANSCEIVER ASSEMBLY

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


    1. Disconnect the L156 telephone transceiver assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L156-9 (E) - Body ground Always Below 1 Ω
      Standard Voltage
      Tester Connection Condition Specified Condition
      L156-12 (+B) - Body ground Power switch off 11 to 14 V
      L156-6 (IG2) - Body ground Power switch off Below 1 V
      L156-6 (IG2) - Body ground Power switch on (IG) 11 to 14 V

    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 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 power switch off.

    3. Turn the power switch on (IG).

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

      OK
      DTC B1586 is not output.

    NG

    REPLACE TELEPHONE TRANSCEIVER ASSEMBLY

    OK

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