ENGINE IMMOBILISER SYSTEM(w/o Entry and Start System), Diagnostic DTC:B2799

DTC Code DTC Name
B2799 Engine Immobiliser System Malfunction

DESCRIPTION

This DTC is stored when one of the following occurs: 1) the ECM detects errors in its own communication with the transponder key ECU assembly; 2) the ECM detects errors in the communication lines; or 3) the ECU communication ID between the transponder key ECU assembly and ECM is different and an engine start is attempted.

DTC No. DTC Detection Condition Trouble Area DTC Output Confirmation Operation
B2799

One of the following conditions is met:


  • Error in communication between ECM and transponder key ECU assembly.

  • Error in communication lines.

  • Communication ID is different during communication between ECM and transponder key ECU assembly.

  • Harness or connector

  • ECM

  • Transponder key ECU assembly

  • Start the engine and wait 10 seconds.

  • After disconnecting and reconnecting the cable to the negative (-) battery terminal, turn the ignition switch to ON and wait 10 seconds.
Vehicle Condition and Fail-safe Operation when Malfunction Detected
Vehicle Condition when Malfunction Detected Fail-safe Operation when Malfunction Detected
Engine cannot be started -
Related Data List and Active Test
DTC No. Data List and Active Test
B2799 -

WIRING DIAGRAM

B001CX7E14

CAUTION / NOTICE / HINT

Note


  • If the transponder key ECU assembly or ECM is replaced, refer to the Service Bulletin.

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

  • When using the GTS with the vehicle ignition switch off, connect the GTS to the vehicle 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 the Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Immobiliser. 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.

Tech Tips

If the transponder key ECU assembly DTC is output simultaneously, troubleshoot the transponder key ECU assembly DTCs first.

PROCEDURE


  1. CLEAR DTC


    1. Clear the DTCs Click here.


    NEXT

  2. CHECK FOR DTC


    1. Perform "DTC Output Confirmation Operation" procedure.

    2. Check for DTCs Click here.

      OK
      DTC B2799 is not output.
      Result
      Result Proceed to
      NG (DTC B2799 is output) A
      NG (Other DTCs are output) B
      OK C

    B

    GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

    C

    USE SIMULATION METHOD TO CHECK Click here

    A

  3. INSPECT ECM (TERMINAL IMO)


    1. Using an oscilloscope, check the waveform.

      B001EG2E01
      Text in Illustration
      *A for 1KD-FTV *B for 2TR-FE (for Automatic Transmission)
      *C for 2TR-FE (for Manual Transmission) *D for 5L-E
      *a

      Component with harness connected

      (ECM)

      		 *b Waveform
      *c Approximately 160 ms *d Approximately 270 ms
      Measurement Condition
      Tester Connection Condition Tool Setting Specified Condition

      G58-29 (IMO) - Body ground*1

      G181-9 (IMO) - Body ground*2

      G182-18 (IMO) - Body ground*3

      		 Within 3 seconds of starter operation and initial combustion, or within 3 seconds of ignition switch first being turned to ON after cable disconnected and reconnected to negative (-) battery terminal 2 V/DIV., 500 ms./DIV.

      Pulse generation

      (See waveform)

      • *1: for 1KD-FTV

      • *2: for 2TR-FE

      • *3: for 5L-E

      OK
      Waveform is similar to that shown in the illustration.
      Result
      Result Proceed to
      Normal waveform A
      Terminal IMO stuck low (2.4 V or less) B
      Terminal IMO stuck high (12 V) or abnormal waveform C

    B

    INSPECT ECM (IMO TERMINAL VOLTAGE) Click here

    C

    REPLACE ECM Click here

    A

  4. INSPECT ECM (TERMINAL IMI)


    1. Using an oscilloscope, check the waveform.

      B001I6IE01
      Text in Illustration
      *A for 1KD-FTV *B for 2TR-FE (for Automatic Transmission)
      *C for 2TR-FE (for Manual Transmission) *D for 5L-E
      *a

      Component with harness connected

      (ECM)

      		 *b Waveform
      *c Approximately 160 ms *d Approximately 270 ms
      Measurement Condition
      Tester Connection Condition Tool Setting Specified Condition

      G58-28 (IMI) - Body ground*1

      G181-10 (IMI) - Body ground*2

      G182-19 (IMI) - Body ground*3

      		 Within 3 seconds of starter operation and initial combustion, or within 3 seconds of ignition switch first being turned to ON after cable disconnected and reconnected to negative (-) battery terminal 2 V/DIV., 500 ms./DIV.

      Pulse generation

      (See waveform)

      • *1: for 1KD-FTV

      • *2: for 2TR-FE

      • *3: for 5L-E

      OK
      Waveform is similar to that shown in the illustration.

    NG

    REPLACE TRANSPONDER KEY ECU ASSEMBLY Click here

    OK

  5. REGISTER ECU COMMUNICATION ID


    1. Register the ECU communication ID.

      Tech Tips

      Refer to the Service Bulletin.


    NEXT

  6. CHECK WHETHER ENGINE STARTS


    1. Using a registered door control transmitter assembly, turn the ignition switch to ON.

    2. Check that the engine starts 5 seconds after the ignition switch was turned to ON.

      OK
      Engine starts normally.

    OK

    END (COMMUNICATION ID REGISTRATION WAS DEFECTIVE)

    NG

    REPLACE ECM Click here

  7. INSPECT ECM (IMO TERMINAL VOLTAGE)


    1. Disconnect the G58*1, G181*2 or G182*3 ECM connector.


      • *1: for 1KD-FTV

      • *2: for 2TR-FE

      • *3: for 5L-E

      B001DYME01
      Text in Illustration
      *A for 1KD-FTV *B for 2TR-FE
      *C for 5L-E - -
      *a

      Front view of wire harness connector

      (to ECM)

      		 - -

    2. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Condition Specified Condition

      G58-29 (IMO) - Body ground*1

      G181-9 (IMO) - Body ground*2

      G182-18 (IMO) - Body ground*3

      		 Ignition switch turned to ON using registered door control transmitter assembly Terminal IMO stuck low (2.4 V or less)

      • *1: for 1KD-FTV

      • *2: for 2TR-FE

      • *3: for 5L-E

      Result
      Result Proceed to
      Terminal IMO stuck low (2.4 V or less) A
      Terminal IMO stuck high (12 V) or abnormal waveform B

    B

    REPLACE ECM Click here

    A

  8. CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU ASSEMBLY - ECM)


    1. Disconnect the G74 transponder key ECU assembly connector.

    2. Disconnect the G58*1, G181*2 or G182*3 ECM connector.


      • *1: for 1KD-FTV

      • *2: for 2TR-FE

      • *3: for 5L-E

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

      Standard Resistance
      for 1KD-FTV
      Tester Connection Condition Specified Condition
      G74-12 (EFII) - G58-29 (IMO) Always Below 1 Ω
      G74-13 (EFIO) - G58-28 (IMI) Always Below 1 Ω
      G74-12 (EFII) or G58-29 (IMO) - Body ground Always 10 kΩ or higher
      G74-13 (EFIO) or G58-28 (IMI) - Body ground Always 10 kΩ or higher
      for 2TR-FE
      Tester Connection Condition Specified Condition
      G74-12 (EFII) - G181-9 (IMO) Always Below 1 Ω
      G74-13 (EFIO) - G181-10 (IMI) Always Below 1 Ω
      G74-12 (EFII) or G181-9 (IMO) - Body ground Always 10 kΩ or higher
      G74-13 (EFIO) or G181-10 (IMI) - Body ground Always 10 kΩ or higher
      for 5L-E
      Tester Connection Condition Specified Condition
      G74-12 (EFII) - G182-18 (IMO) Always Below 1 Ω
      G74-13 (EFIO) - G182-19 (IMI) Always Below 1 Ω
      G74-12 (EFII) or G182-18 (IMO) - Body ground Always 10 kΩ or higher
      G74-13 (EFIO) or G182-19 (IMI) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  9. REPLACE TRANSPONDER KEY ECU ASSEMBLY


    1. Replace the transponder key ECU assembly with a new one.

      Tech Tips

      Refer to the Service Bulletin.

      Note

      Key ID code registration is necessary when replacing the transponder key ECU assembly, refer to the Service Bulletin.


    NEXT

  10. CHECK WHETHER ENGINE STARTS


    1. Using a registered door control transmitter assembly, turn the ignition switch to ON.

    2. Check that the engine starts 5 seconds after the ignition switch was turned to ON

      OK
      Engine starts normally.
      Result
      Result Proceed to
      OK A
      NG (for 1KD-FTV) B
      NG (for 2TR-FE) C
      NG (for 5L-E) D

    A

    END (TRANSPONDER KEY ECU ASSEMBLY WAS DEFECTIVE)

    B

    REPLACE ECM Click here

    C

    REPLACE ECM Click here

    D

    REPLACE ECM Click here

  11. REPLACE ECM


    1. Temporarily replace the ECM with a new one.



    NEXT

  12. REGISTER ECU COMMUNICATION ID


    1. Register the ECU communication ID.

      Tech Tips

      Refer to the Service Bulletin.


    NEXT

  13. CHECK WHETHER ENGINE STARTS


    1. Using a registered door control transmitter assembly, turn the ignition switch to ON.

    2. Check that the engine starts 5 seconds after the ignition switch was turned to ON

      OK
      Engine starts normally.

    OK

    END (ECM WAS DEFECTIVE)

    NG

    REPLACE TRANSPONDER KEY ECU ASSEMBLY