BLOCKING SYSTEM Engine does not Start

DESCRIPTION

If the engine does not start and no DTCs are output, the following conditions may apply:


WIRING DIAGRAM

A01EVVWE01

INSPECTION PROCEDURE

Note


  • Before troubleshooting this symptom, make sure no engine immobiliser system DTCs or blocking system DTCs are present. If present, troubleshoot the engine immobiliser system DTCs or blocking system DTCs first.

  • When replacing the telephone transceiver assembly and 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.

  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE


  1. CHECK BLOCKING SYSTEM (SETTING)


    1. Check the blocking system setting.

      Tech Tips

      Check with the customer's contracted service provider to determine whether the blocking system is set.

      Result
      Result Proceed to
      Blocking system is unset. A
      Blocking system is set. B

    B

    UNSET BLOCKING SYSTEM

    A

  2. 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
      I70-1 (BLK1) - A43-14 (EFII) Always 10 kΩ or higher
      I70-2 (BLK4) - A43-13 (EFIO) Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. 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).
      Result
      Result Proceed to
      NG (stuck high) A
      NG (stuck low) B
      OK C

    B

    REPLACE TELEPHONE TRANSCEIVER ASSEMBLY

    C

    REGISTER ECU COMMUNICATION ID Click here

    A

  4. 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

  5. PERFORM REGISTRATION


    1. Perform the registration.

      Tech Tips

      Refer to the Service Bulletin.


    NEXT

  6. CHECK WHETHER ENGINE STARTS


    1. Check that the engine starts normally.

      OK
      Engine starts normally.

    NG

    REPLACE TELEPHONE TRANSCEIVER ASSEMBLY

    OK

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

  7. REGISTER ECU COMMUNICATION ID


    1. Register the ECU communication ID between the ECM and certification ECU (smart key ECU assembly).

      Tech Tips

      Refer to the Service Bulletin.


    NEXT

  8. CHECK WHETHER ENGINE STARTS


    1. Check that the engine starts normally.

      OK
      Engine starts normally.

    NG

    REPLACE TELEPHONE TRANSCEIVER ASSEMBLY

    OK

    END (ECU COMMUNICATION ID WAS NOT REGISTERED CORRECTLY)