ENGINE IMMOBILISER SYSTEM (w/o Entry and Start System) Engine does not Start but Initial Combustion Occurs

DESCRIPTION

The key ID code of the transponder chip inside the IG key is compared against the key ID code registered in the transponder key ECU assembly. While checking the code, the transponder key ECU assembly supplies electrical power to the transponder chip in the key by means of the transponder key amplifier. If the codes match, the immobiliser is then UNSET (released), and after the engine start permission signal is sent to the ECM, if communication is functioning properly, engine start can be performed.

INSPECTION PROCEDURE

PROCEDURE

1. Click here

   CHECK FOR DTC

   
   

   1. Check for DTCs (Click here).

      Tip:

      Before checking for DTCs, perform the "DTC Output Confirmation Operation" procedure.

      Table 1. Result

      Result	Proceed to
      No DTC output	A
      DTC output	B

   
   
   • AClick here
   • BClick here
2. Click here

   CONFIRM ENGINE MODEL

   
   

   1. Check the vehicle specifications.

      Table 2. Result

      Result	Proceed to
      1GR-FE	A
      1VD-FTV	B

   
   
   • AClick here
   • BClick here
3. Click here

   READ VALUE USING INTELLIGENT TESTER

   
   

   1. Turn the ignition switch off.

   2. Connect the intelligent tester to the DLC3.

   3. Turn the ignition switch to ON.

   4. Turn the intelligent tester on.

   5. Enter the following menus: Powertrain / Engine and ECT / Data List.

      Table 3. Engine and ECT

      Tester Display	Measurement Item/Range	Normal Condition	Stored as Freeze Frame Data
      Immobiliser Fuel Cut	Status of immobiliser fuel cut/ ON or OFF	-	Yes

      OK
      The item in the Data List indicates "OFF".

   
   
   • OKClick here
   • NGClick here
4. Click here

   CHECK WHETHER ENGINE STARTS

   
   

   1. Turn the ignition switch to ON, wait for 5 seconds, and then attempt to start the engine.

      Table 4. Result

      Result	Proceed to
      Engine cannot be started	A
      Engine can be started	B

   
   
   • AClick here
   • BClick here
5. Click here

   CHECK ECM (TERMINAL IMI)

   
   
   1. 

      Using an oscilloscope, check the waveform.

      Table 5. Text in Illustration

      *A	for LHD	*B	for RHD
      *a	Component with harness connected (ECM)	*b	Component with harness connected (Transponder Key ECU Assembly)
      *c	Waveform 1	*d	Waveform 2
      *e	Waveform A	-	-

      Table 6. Measurement Condition

      Item	Content
      Tester Connection	A38-11 (IMI) - E96-13 (EFIO)*1 A52-11 (IMI) - E96-13 (EFIO)*2
      Tool Setting	2 V/DIV., 500 ms./DIV.
      Condition	Within 3 seconds after starter operates and initial combustion occurs, or within 3 seconds after ignition switch first turned to ON after battery disconnected and reconnected

      
      

      • *1: for LHD

      • *2: for RHD

      Tip:

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

      OK
      Waveform is output normally (refer to illustration).

      Table 7. Result

      Result	Proceed to
      Normal waveform	A
      Waveform 1 or 2 (Waveform A) not output, or has abnormal wavelength or shape	B

   
   
   • AClick here
   • BClick here
6. Click here

   CHECK ECM (TERMINAL IMO)

   
   
   1. 

      Using an oscilloscope, check the waveform.

      Table 8. Text in Illustration

      *A	for LHD	*B	for RHD
      *a	Component with harness connected (ECM)	*b	Component with harness connected (Transponder Key ECU Assembly)
      *c	Waveform 1	*d	Waveform 2
      *e	Waveform B	*f	160 ms
      *g	510 ms	*h	270 ms

      Table 9. Measurement Condition

      Item	Content
      Tester Connection	A38-10 (IMO) - E96-12 (EFII)*1 A52-10 (IMO) - E96-12 (EFII)*2
      Tool Setting	2 V/DIV., 500 ms./DIV.
      Condition	Within 3 seconds after starter operates and initial combustion occurs, or within 3 seconds after ignition switch first turned to ON after battery disconnected and reconnected

      
      

      • *1: for LHD

      • *2: for RHD

      Tip:

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

      OK
      Waveform is output normally (refer to illustration).

      Table 10. Result

      Result	Proceed to
      Normal waveform	A
      Waveform 1 or 2 (Waveform B) not output, or has abnormal wavelength or shape (for 1GR-FE)	B
      Waveform 1 or 2 (Waveform B) not output, or has abnormal wavelength or shape (for 1VD-FTV)	C

   
   
   • AClick here
   • BClick here
   • CClick here
7. Click here

   CHECK ECM (TERMINAL IMI)

   
   
   1. 

      Using an oscilloscope, check the waveform.

      Table 11. Text in Illustration

      *A	for LHD	*B	for RHD
      *a	Component with harness connected (ECM)	*b	Component with harness connected (Transponder Key ECU Assembly)
      *c	Waveform 1	*d	Waveform 2
      *e	Waveform C	*f	160 ms
      *g	510 ms	*h	270 ms

      Table 12. Measurement Condition

      Item	Content
      Tester Connection	A38-11 (IMI) - E96-13 (EFIO)*1 A52-11 (IMI) - E96-13 (EFIO)*2
      Tool Setting	2 V/DIV., 500 ms./DIV.
      Condition	Within 3 seconds after starter operates and initial combustion occurs, or within 3 seconds after ignition switch first turned to ON after battery disconnected and reconnected

      
      

      • *1: for LHD

      • *2: for RHD

      Tip:

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

      OK
      Waveform is output normally (refer to illustration).

      Table 13. Result

      Result	Proceed to
      Normal waveform	A
      Waveform 1 or 2 (Waveform C) not output, or has abnormal wavelength or shape	B

   
   
   • AClick here
   • BClick here
8. Click here

   REGISTER ECU COMMUNICATION ID

   
   

   1. Register the ECU communication ID (refer to the Service Bulletin).

   
   
   • NEXTClick here
9. Click here

   CHECK WHETHER ENGINE STARTS

   
   

   1. Check that the engine starts with the key.

      OK
      Engine starts normally.

   
   
   • OKClick here
   • NGClick here
10. Click here

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

    
    

    1. for LHD:

       
       

       1. Disconnect the A38 ECM connector.

       2. Disconnect the E96 transponder key ECU assembly connector.

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

          Standard Resistance
          Tester Connection Condition Specified Condition A38-11 (IMI) - E96-13 (EFIO) Always Below 1 Ω E96-13 (EFIO) - Body ground Always 10 kΩ or higher

    2. for RHD:

       
       

       1. Disconnect the A52 ECM connector.

       2. Disconnect the E96 transponder key ECU assembly connector.

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

          Standard Resistance
          Tester Connection Condition Specified Condition A52-11 (IMI) - E96-13 (EFIO) Always Below 1 Ω E96-13 (EFIO) - Body ground Always 10 kΩ or higher

    
    
    • OKClick here
    • NGClick here
11. Click here

    REPLACE TRANSPONDER KEY ECU ASSEMBLY

    
    

    1. Replace the transponder key ECU assembly.

    2. Check that the engine starts with the key.

       OK
       Engine starts normally.

       Table 14. Result

       Result	Proceed to
       OK	A
       NG (for 1GR-FE)	B
       NG (for 1VD-FTV)	C

    
    
    • AClick here
    • BClick here
    • CClick here
12. Click here

    GO TO DIAGNOSTIC TROUBLE CODE CHARTClick here

13. Click here

    USE SIMULATION METHOD TO CHECKClick here

14. Click here

    REPLACE ECMClick here

15. Click here

    REPLACE ECMClick here

16. Click here

    END

17. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR

18. Click here

    END

19. Click here

    GO TO SFI SYSTEMClick here

20. Click here

    GO TO ECD SYSTEMClick here