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

DESCRIPTION

This DTC is stored when one of the following occurs: 1) the ECM detects errors in its own communications with the transponder key ECU; 2) the ECM detects errors in the communication lines; or 3) the ECU - ECM communication ID between the transponder key ECU and ECM is different and an engine start is attempted. Before troubleshooting for this DTC, make sure no engine immobiliser DTCs are output. If output, troubleshoot the engine immobiliser DTCs first.

INSPECTION PROCEDURE

PROCEDURE

1. Click here

   CLEAR DTC

   
   

   1. Clear the DTCs (Click here).

   
   
   • NEXTClick here
2. Click here

   CHECK FOR DTC

   
   

   1. Check for DTCs (Click here).

      OK
      DTC B2799 is not output.

   
   
   • OKClick here
   • NGClick here
3. Click here

   REREGISTER ECU - ECM COMMUNICATION ID

   
   

   1. Reregister the ECU - ECM communication ID.

   
   
   • NEXTClick here
4. Click here

   CLEAR DTC

   
   

   1. Clear the DTCs (Click here).

   
   
   • NEXTClick here
5. Click here

   CHECK FOR DTC

   
   

   1. Check for DTCs (Click here).

      OK
      DTC B2799 is not output.

   
   
   • OKClick here
   • NGClick here
6. Click here

   CHECK CONNECTION OF CONNECTOR

   
   

   1. Turn the ignition switch off.

   2. Check that the connectors are properly connected to the ECM and transponder key ECU.

      OK
      Connectors are properly connected.

   
   
   • OKClick here
   • NGClick here
7. Click here

   CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU - ECM)

   
   
   1. 

      Disconnect the H110 ECU connector.

   2. Disconnect the A51 ECM connector.

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

      Standard Resistance
      for AD Series Engine
      Tester Connection Condition Specified Condition H110-13 (EFIO) - A51-16 (IMI) Always Below 1 Ω H110-12 (EFII) - A51-15 (IMO) H110-13 (EFIO) or A51-16 (IMI) - Body ground Always 10 kΩ or higher H110-12 (EFII) or A51-15 (IMO) - Body ground
      for ZR Series Engine
      Tester Connection Condition Specified Condition H110-13 (EFIO) - A51-11 (IMI) Always Below 1 Ω H110-12 (EFII) - A51-10 (IMO) H110-13 (EFIO) or A51-11 (IMI) - Body ground Always 10 kΩ or higher H110-12 (EFII) or A51-10 (IMO) - Body ground

      Table 1. Text in Illustration

      *1	for AD Series Engine
      *2	for ZR Series Engine
      *3	Front view of wire harness connector (to Transponder Key ECU)
      *4	Front view of wire harness connector (to ECM)

   
   
   • OKClick here
   • NGClick here
8. Click here

   REPLACE TRANSPONDER KEY ECU

   
   

   1. Temporarily replace the transponder key ECU with a new one.

   
   
   • NEXTClick here
9. Click here

   CLEAR DTC

   
   

   1. Clear the DTCs (Click here).

   
   
   • NEXTClick here
10. Click here

    CHECK FOR DTC

    
    

    1. Check for DTCs (Click here).

       OK
       DTC B2799 is not output.

       Table 2. Result

       Result	Proceed to
       OK	A
       NG (for 1AD-FTV)	B
       NG (for 2AD-FHV)	C
       NG (for 1ZR-FAE)	D
       NG (for 2ZR-FAE)	E

    
    
    • AClick here
    • BClick here
    • CClick here
    • DClick here
    • EClick here
11. Click here

    END (TRANSPONDER KEY ECU IS DEFECTIVE)

12. Click here

    USE SIMULATION METHOD TO CHECKClick here

13. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR

14. Click here

    REPLACE ECMClick here

15. Click here

    CONNECT CONNECTOR CORRECTLY

16. Click here

    END

17. Click here

    REPLACE ECMClick here

18. Click here

    REPLACE ECMClick here

19. Click here

    REPLACE ECMClick here