Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Transponder Chip Malfunction (B2793,B2797)

Toyota Corolla Cross (2022-2024) Service Manual / Vehicle Interior / Theft Deterrent / Keyless Entry / Immobiliser System (w/o Smart Key System) / Transponder Chip Malfunction (B2793,B2797)

DESCRIPTION

  • DTC B2793 is stored when a malfunction is found in the door control transmitter assembly during key ID code registration or a key ID code is not registered normally. Replace the door control transmitter assembly if key ID code registration cannot be performed normally and this DTC is output.
  • DTC B2797 is stored when a door control transmitter assembly with a BCC malfunction is inserted into the ignition key cylinder.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Note

B2793

Transponder Chip Malfunction

A transponder chip malfunction (1 trip detection logic*).

Door control transmitter assembly

 DTC Output Confirmation Operation:
  • Insert the door control transmitter assembly into the ignition key cylinder.

B2797

Communication Malfunction No. 1

A door control transmitter assembly with a BCC malfunction is inserted into the ignition key cylinder (1 trip detection logic*).

Door control transmitter assembly

 DTC Output Confirmation Operation:
  • Insert the door control transmitter assembly into the ignition key cylinder.
  • *: Only output while a malfunction is present.
Vehicle Condition and Fail-safe Operation when Malfunction Detected

Vehicle Condition when Malfunction Detected

Fail-safe Operation when Malfunction Detected

Engine cannot be started

-
Related Data List and Active Test

DTC No.

Data List and Active Test

B2793

-

B2797

-

CAUTION / NOTICE / HINT

NOTICE:

  • If the door control transmitter assembly is replaced, refer to Registration.

    Click here

  • After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".

PROCEDURE

1.

REPLACE DOOR CONTROL TRANSMITTER ASSEMBLY

(a) Replace the door control transmitter assembly.

NEXT

END (DOOR CONTROL TRANSMITTER ASSEMBLY WAS DEFECTIVE)

    READ NEXT:

     Unmatched Encryption Code (B2794)

    DESCRIPTION This DTC is stored when a door control transmitter assembly with an incomplete key ID code is inserted into the ignition key cylinder. DTC No. Detection Item DTC Detection Con

     Unmatched Key Code (B2795)

    DESCRIPTION This DTC is stored when a door control transmitter assembly with a different vehicle serial number is inserted into the ignition key cylinder. DTC No. Detection Item DTC Detec

     No Communication in Immobiliser System (B2796,B2798)

    DESCRIPTION This DTC is stored when a door control transmitter assembly is inserted into the ignition key cylinder but no communication occurs between the door control transmitter assembly and transpo

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