Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Unmatched Encryption Code (B2794)

Toyota Corolla Cross (2022-2026) Service Manual / Vehicle Interior / Theft Deterrent / Keyless Entry / Immobiliser System (w/o Smart Key System) / 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 Condition

Trouble Area

Note

B2794

Unmatched Encryption Code

A door control transmitter assembly with an incomplete key ID code 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

B2794

-

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.

REGISTRATION OF TRANSMITTER ID

(a) Register the door control transmitter assembly which caused the DTC to be stored.

NEXT

2.

CLEAR DTC

(a) Clear the DTCs.

Body Electrical > Immobiliser > Clear DTCs
NEXT

3.

CHECK FOR DTC

(a) Perform "DTC Output Confirmation Operation" procedure.

(b) Check for DTCs.

Body Electrical > Immobiliser > Trouble Codes

Result

Proceed to

B2794 is not output

A

B2794 is output

B
A

END (DOOR CONTROL TRANSMITTER ASSEMBLY WAS NOT REGISTERED)
B

REPLACE DOOR CONTROL TRANSMITTER ASSEMBLY THAT DTC IS OUTPUT

    READ NEXT:

     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

     Engine Immobiliser System Signal (Some Circuit Quantity, Reported via Serial Data) Invalid (B279986)

    DESCRIPTION The ECM stores this DTC when a communication line between the ECM and transponder key ECU assembly is malfunctioning or the communication ID of the ECM and transponder key ECU assembly do

    SEE MORE:

     Utility

    UTILITY REFRIGERANT SHORTAGE CHECK USING GTS (a) Check that the following conditions are met and perform the refrigerant shortage check according to the display on the GTS. Measurement Condition: Item Condition A/C switch On Ambient temperature*1 0 to 49°C (32 to 120

     Hybrid/EV Battery Cooling Fan 1 Component Internal Failure (P0A8196,P0A8198)

    DESCRIPTION Refer to the description for DTC P0A8111. Click here DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate Note P0A8196 Hybrid/EV Battery Cooling Fan 1 Component Internal Failure The battery cooling blower a

    © 2020-2026 Copyright www.tcorollacross.com PT NL