B2799

THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILIZER SYSTEM: B2799: Engine Immobilizer System Malfunction
B2799 - Engine Immobilizer System Malfunction

DESCRIPTION

This DTC is stored when one of the following occurs: 1) the hybrid vehicle control ECU detects an error in its own communication with the ID code box (immobilizer code ECU); 2) the hybrid vehicle control ECU detects an error in the communication lines; or 3) the ECU communication ID between the ID code box (immobilizer code ECU) and hybrid vehicle control ECU is different and a hybrid control system start is attempted.

HINT
Before troubleshooting this DTC, make sure that no certification ECU (smart key ECU assembly) DTCs are present. If present, troubleshoot the certification ECU (smart key ECU assembly) DTCs first.





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
If the ID code box (immobilizer code ECU) is replaced, register the ECU code and ECU communication ID Engine Immobilizer System.

PROCEDURE

1. CHECK DTC OUTPUT

(a) Clear the DTCs Engine Immobilizer System.

(b) Recheck for DTCs Engine Immobilizer System.

OK:

DTC B2799 is not output.

NG -- RE-REGISTER ECU COMMUNICATION ID

OK -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting

2. RE-REGISTER ECU COMMUNICATION ID

(a) Re-register the ECU communication ID Engine Immobilizer System.

NEXT -- Continue to next step.

3. CHECK DTC OUTPUT

(a) Clear the DTCs Engine Immobilizer System.

(b) Recheck for DTCs Engine Immobilizer System.

OK:

DTC B2799 is not output.

NG -- CHECK CONNECTOR CONNECTION CONDITION

OK -- END (ECU COMMUNICATION ID WAS NOT REGISTERED CORRECTLY)

4. CHECK CONNECTOR CONNECTION CONDITION

(a) Turn the power switch off.

(b) Check that the connectors are properly connected to the hybrid vehicle control ECU and ID code box (immobilizer code ECU).

OK:

Connectors are properly connected.

NG -- CONNECT CONNECTORS PROPERLY
OK -- Continue to next step.

5. CHECK HARNESS AND CONNECTOR (ID CODE BOX - HYBRID VEHICLE CONTROL ECU)

(a) Disconnect the ID code box (immobilizer code ECU) connector.

(b) Disconnect the hybrid vehicle control ECU connector.

(c) Measure the resistance and voltage according to the value(s) in the table below.

Standard Resistance:





Standard Voltage:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

6. REPLACE HYBRID VEHICLE CONTROL ECU

(a) Replace the hybrid vehicle control ECU Removal.

NEXT -- Continue to next step.

7. CHECK DTC OUTPUT

(a) Clear the DTCs Engine Immobilizer System.

(b) Recheck for DTCs Engine Immobilizer System.

OK:

DTC B2799 is not output.

NG -- REPLACE ID CODE BOX (IMMOBILIZER CODE ECU) Removal

OK -- END (HYBRID VEHICLE CONTROL ECU WAS DEFECTIVE)