ENTRY AND START SYSTEM(for Start Function) Immobiliser System does not Operate Properly

DESCRIPTION

The immobiliser function compares the ID code that is registered to the certification ECU (smart key ECU assembly) with the ID code of the transponder chip that is embedded in the electrical key transmitter sub-assembly.

WIRING DIAGRAM

B004AE3E27
*a ID Code Box (Immobiliser Code ECU)
*b Hybrid Vehicle Control ECU Assembly

CAUTION / NOTICE / HINT

Note


  • When using the GTS with the power switch off, connect the GTS to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry&Start. While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.

  • The entry and start system (for Start Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the entry and start system (for Start Function) after confirming that the communication systems are functioning properly.

    Click here

  • Before replacing the ID code box (immobiliser code ECU) or hybrid vehicle control ECU assembly, refer to the Service Bulletin.

  • Make sure that no DTCs are output. If any DTCs are output, proceed to the Diagnostic Trouble Code Chart.

  • After completing repairs, confirm that the problem does not recur.

  • After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".

PROCEDURE


  1. CHECK FOR DTC


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Entry&Start / Trouble Codes.

    5. Check for DTCs.


      Body Electrical > Entry&Start > Trouble Codes
      Powertrain > Hybrid Control > Trouble Codes
      Result
      Result Proceed to
      DTCs are not output A
      DTCs are output B

    B

    GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

    A

  2. CHECK WHETHER HYBRID CONTROL SYSTEM STARTS


    1. Check that the hybrid control system starts within 5 seconds of the power switch being turned on (READY).

      OK
      Hybrid control system starts normally.
      Result
      Proceed to
      OK
      NG

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

  3. CHECK HYBRID VEHICLE CONTROL ECU ASSEMBLY (TERMINAL IMI AND IMO)


    1. Using an oscilloscope, check the waveform.

      B004CETC11
      *a

      Component with harness connected

      (Hybrid Vehicle Control ECU Assembly)

      		 *b Approximately 160 ms.
      *c Approximately 270 ms. *d Approximately 40 ms.
      *e Approximately 60 ms. *f IMO Waveform
      *g IMI Waveform *h Waveform A
      *i Waveform B *j Waveform C
      *k Waveform A (detail) - -

      Note

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

      Measurement Condition
      Tester Connection Condition Tool Setting Specified Condition
      P64-12 (IMO) - Body ground Within 3 seconds of hybrid control system start or within 3 seconds of power switch turned on (IG) after cable disconnected and reconnected to auxiliary battery 2 V/DIV., 500 ms./DIV.

      Pulse generation

      (See waveform 2)
      P64-11 (IMI) - Body ground Within 3 seconds of hybrid control system start or within 3 seconds of power switch turned on (IG) after cable disconnected and reconnected to auxiliary battery 2 V/DIV., 500 ms./DIV.

      Pulse generation

      (See waveform 1 and 3)
      Result
      Result Proceed to
      Normal waveform A
      Waveform A is not output, or has abnormal wavelength or shape B
      Waveform B is not output, or has abnormal wavelength or shape C
      Waveform C is not output, or has abnormal wavelength or shape D

    B

    CHECK HARNESS AND CONNECTOR (ID CODE BOX (IMMOBILISER CODE ECU) - HYBRID VEHICLE CONTROL ECU ASSEMBLY) Click here

    C

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY Click here

    D

    REPLACE ID CODE BOX (IMMOBILISER CODE ECU) Click here

    A

  4. REGISTER ECU COMMUNICATION ID (ID CODE BOX (IMMOBILISER CODE ECU) - HYBRID VEHICLE CONTROL ECU ASSEMBLY)


    1. Register the ECU communication ID codes.

      Tech Tips

      Refer to Service Bulletin.

      Result
      Proceed to
      NEXT

    NEXT

  5. CHECK WHETHER HYBRID CONTROL SYSTEM STARTS


    1. Check that the hybrid control system starts.

      OK
      Hybrid control system starts normally.
      Result
      Proceed to
      OK
      NG

    OK

    END (COMMUNICATION ID WAS NOT REGISTERED)

    NG

    GO TO STEP 7 Click here

  6. CHECK HARNESS AND CONNECTOR (ID CODE BOX (IMMOBILISER CODE ECU) - HYBRID VEHICLE CONTROL ECU ASSEMBLY)


    1. Disconnect the P51 ID code box (immobiliser code ECU) connector.

    2. Disconnect the P64 hybrid vehicle control ECU assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      P51-3 (EFII) - P64-12 (IMO) Always Below 1 Ω
      P51-4 (EFIO) - P64-11 (IMI) Always Below 1 Ω
      P51-3 (EFII) or P64-12 (IMO) - Other terminals and body ground Always 10 kΩ or higher
      P51-4 (EFIO) or P64-11 (IMI) - Other terminals and body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. REPLACE ID CODE BOX (IMMOBILISER CODE ECU)


    1. Replace the ID code box (immobiliser code ECU) with a new one.

      Tech Tips

      Refer to Service Bulletin.

      Result
      Proceed to
      NEXT

    NEXT

  8. REGISTER RECOGNITION CODE


    1. Register the recognition codes to the ECUs.

      Tech Tips

      Refer to Service Bulletin.

      Result
      Proceed to
      NEXT

    NEXT

  9. REGISTER ECU COMMUNICATION ID


    1. Register the ECU communication ID codes.

      Tech Tips

      Refer to Service Bulletin.

      Result
      Proceed to
      NEXT

    NEXT

  10. CHECK WHETHER HYBRID CONTROL SYSTEM STARTS


    1. Check that the hybrid control system starts.

      OK
      Hybrid control system starts normally.
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    GO TO HYBRID CONTROL SYSTEM Click here