DESCRIPTION
- DTC B2793 is stored when a malfunction is found in the key during key ID
code registration or a key ID code is not registered normally. Replace the key
if key ID code registration cannot be performed normally and this DTC is output.
- DTC B2794 is stored when a key with an incomplete key ID code is inserted
into the ignition key cylinder.
- DTC B2797 is stored when a key with a BCC malfunction is inserted into the
ignition key cylinder.
- DTC B2798 is stored when a key is inserted into the ignition key cylinder
but a communication error occurs between the key and transponder key ECU assembly.
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DTC No.
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Detection Item
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DTC Detection Condition
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Trouble Area
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Note
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B2793
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Transponder Chip Malfunction
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A transponder chip malfunction (1 trip detection logic*).
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- Transponder key coil
- Transponder key ECU assembly
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- Insert the key into the ignition key cylinder.
|
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B2794
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Unmatched Encryption Code
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A key with an incomplete key ID code is inserted into the ignition key
cylinder (1 trip detection logic*).
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- Transponder key coil
- Transponder key ECU assembly
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- Insert the key into the ignition key cylinder.
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B2797
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Communication Malfunction No. 1
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A key with a BCC malfunction is inserted into the ignition key cylinder
(1 trip detection logic*).
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- Transponder key coil
- Transponder key ECU assembly
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- Insert the key into the ignition key cylinder.
|
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B2798
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Communication Malfunction No. 2
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Key ID code identification cannot be completed within the specified time
(1 trip detection logic*).
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- Transponder key coil
- Transponder key ECU assembly
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- Insert the key into the ignition key cylinder.
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- *: Only output while a malfunction is present.
Vehicle Condition and Fail-safe Operation when Malfunction Detected
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Vehicle Condition when Malfunction Detected
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Fail-safe Operation when Malfunction Detected
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Engine cannot be started
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-
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Related Data List and Active Test
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DTC No.
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Data List and Active Test
|
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B2793
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Abnormal Status
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B2794
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Different Encrypt Code
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B2797
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Bcc Malfunction
|
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B2798
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Frame Error
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CAUTION / NOTICE / HINT
NOTICE:
- If the transponder key ECU assembly is replaced, refer to Registration
Click here 
- After repair, confirm that no DTCs are output by performing "DTC Output
Confirmation Operation".
PROCEDURE
(a) Clear the DTCs.
Click here
| NEXT |
|
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(a) Insert and remove each registered key one at a time, and check for DTCs each
time.
Click here
HINT:
- Before checking for DTCs, perform "DTC Output Confirmation Operation" procedure.
- If DTC B2793, B2794, B2797 or B2798 are stored, clear the DTCs before checking
the next key.
OK:
DTC B2793, B2974, B2797 or B2798 is not output.
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Result
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Proceed to
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DTCs are not output
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A
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DTCs are output for all of the keys
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B
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DTCs are output for any of the keys
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C
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| A |
 |
USE SIMULATION METHOD TO CHECK
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| C |
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REPLACE KEY THAT DTC IS OUTPUT
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| B |
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3.
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CHECK CONNECTION OF CONNECTOR
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(a) Check that the connectors are properly connected to the transponder key coil.
(b) Check that the engine starts with the key.
OK:
Engine starts.
| OK |
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END (CONNECTOR WAS NOT CONNECTED PROPERLY)
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| NG |
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4.
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CHECK TRANSPONDER KEY COIL
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(a) Clear the DTCs.
Click here
(b) Replace the transponder key coil.
Click here
(c) Check that the engine starts with the key.
OK:
Engine starts.
| OK |
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END (TRANSPONDER KEY COIL WAS DEFECTIVE)
|
| NG |
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REPLACE TRANSPONDER KEY ECU ASSEMBLY
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