DTC B2799-86: Engine Immobilizer System Signal (Some Circuit Quantity, Reported via Serial Data) Invalid [08/2016 - ]: Procedure

1. Clear the DTCs (Refer to DTC CHECK / CLEAR [08/2016 - ] ).
2. Recheck for DTCs (Refer to DTC CHECK / CLEAR [08/2016 - ] ).

   OK

   DTC B2799-86 is not output.

Result: 

OK 

USE SIMULATION METHOD TO CHECK 

(Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2016 - 11/2017] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2017 - ] )

Result: 

NG 

See step  2

1. Re-register the ECU communication ID (Refer to REGISTRATION [08/2016 - ] ).

Result: 

NEXT 

See step  3

1. Clear the DTCs (Refer to DTC CHECK / CLEAR [08/2016 - ] ).
2. Recheck for DTCs (Refer to DTC CHECK / CLEAR [08/2016 - ] ).

   OK

   DTC B2799-86 is not output.

Result: 

OK 

END (ECU COMMUNICATION ID WAS INCORRECT) 

Result: 

NG 

See step  4

1. Turn the engine switch off.
2. Check that the connectors are properly connected to the ECM and certification ECU.

   OK

   Connectors are properly connected.

Result: 

NG 

CONNECT CONNECTORS PROPERLY 

Result: 

OK 

See step  5

1. Disconnect the certification ECU connector.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D88-34 (EFII) - A69-45 (IMO)	Always	Below 1 Ω
   D88-35 (EFIO) - A69-59 (IMI)	Always	Below 1 Ω
   D88-34 (EFII) - Body ground	Always	10 kΩ or higher
   D88-35 (EFIO) - Body ground	Always	10 kΩ or higher

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  6

1. Replace the ECM (Refer to REMOVAL [08/2016 - ] ).

Result: 

NEXT 

See step  7

1. Clear the DTCs (Refer to DTC CHECK / CLEAR [08/2016 - ] ).
2. Recheck for DTCs (Refer to DTC CHECK / CLEAR [08/2016 - ] ).

   OK

   DTC B2799-86 is not output.

Result: 

OK 

END (ECM WAS DEFECTIVE) 

Result: 

NG 

REPLACE SMART KEY ECU ASSEMBLY 

(Refer to REMOVAL [12/2015 - 11/2017] , or refer to REMOVAL [11/2017 - ] )