B2796

THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM (w/o Smart Key System): B2796, B2798:

B2798 - Communication Malfunction No. 2

DESCRIPTION

* DTC B2796 is stored when a key is inserted into the ignition key cylinder but no communication occurs between the key and transponder key ECU assembly.





* *: Only output while a malfunction is present.

Vehicle Condition and Fail-safe Operation when Malfunction Detected





Related Data List and Active Test





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
* When replacing the transponder key ECU assembly or key, refer to Registration How To Proceed With Troubleshooting.
* After performing repairs, perform the operation that fulfills the DTC output confirmation operation, and then confirm that no DTCs are output again.

PROCEDURE

1. CLEAR DTC

(a) Clear the DTCs Engine Immobilizer System (w/o Smart Key System).

NEXT -- Continue to next step.

2. CHECK FOR DTC

(a) Check for DTCs Engine Immobilizer System (w/o Smart Key System).

OK:

DTC B2796 is not output.

NG -- CHECK WHETHER ENGINE STARTS WITH OTHER KEYS

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

3. CHECK WHETHER ENGINE STARTS WITH OTHER KEYS

(a) Check if the engine starts with an already registered vehicle key.

OK:

Engine starts.

NG -- CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU - TRANSPONDER KEY AMPLIFIER)

OK -- REREGISTER KEY CODE OR REPLACE KEY THAT CANNOT START ENGINE

4. CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU - TRANSPONDER KEY AMPLIFIER)

(a) Disconnect the C39 transponder key ECU assembly connector.

(b) Disconnect the C17 transponder key amplifier connector.

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

Standard Resistance:





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

5. REPLACE TRANSPONDER KEY AMPLIFIER

(a) Temporarily replace the transponder key amplifier with a new or normally functioning one Removal.

NEXT -- Continue to next step.

6. CHECK WHETHER ENGINE STARTS

(a) Check that the engine starts normally.

OK:

Engine starts normally.

NG -- REPLACE TRANSPONDER KEY ECU ASSEMBLY Removal

OK -- END (TRANSPONDER KEY AMPLIFIER IS DEFECTIVE)