Toyota CH-R Service Manual: Unmatched Key Code (B2795)

Toyota CH-R Service Manual / Theft Deterrent / Keyless Entry / Immobiliser System(w/o Smart Key System) / Unmatched Key Code (B2795)

DESCRIPTION

This DTC is stored when a key with a different vehicle serial number is inserted into the ignition key cylinder.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Note

B2795

Unmatched Key Code

A key with a different vehicle serial number is inserted into the ignition key cylinder (1 trip detection logic*).
  • Key
  • Transponder key ECU assembly
  • Insert the key 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 Items

DTC No.

Data List and Active Test

B2795

-

CAUTION / NOTICE / HINT

NOTICE:

  • If the transponder key ECU assembly or key is replaced, refer to Registration.

    Click here

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

PROCEDURE

1.

CLEAR DTC

(a) Clear the DTCs.

Body Electrical > Immobiliser > Clear DTCs
NEXT

2.

CHECK FOR DTC

(a) Insert and remove each registered key one at a time, and check for DTCs each time.

Body Electrical > Immobiliser > Trouble Codes

HINT:

  • Before checking for DTCs, perform the "DTC Output Confirmation Operation" procedure.
  • If DTC B2795 is stored, check for DTCs with the next key after clearing the DTCs.

OK:

DTC B2795 is not output.

Result

Proceed to

B2795 is not output

A

DTC B2795 is output for all of the keys

B

DTC B2795 is output for any of the keys

C
A

USE SIMULATION METHOD TO CHECK

B

REPLACE TRANSPONDER KEY ECU ASSEMBLY

C

3.

CHECK OPERATION (IG ON)

(a) Check that the ignition switch can be turned to ON using the key for which the DTC was stored.

OK:

Ignition switch can be turned to ON using the key (for which the DTC was stored).

NG

REPLACE KEY THAT DTC IS OUTPUT
OK

4.

REREGISTRATION

(a) Clear the DTCs.

Click here

Body Electrical > Immobiliser > Clear DTCs

(b) Reregister the key ID code with the transponder key ECU assembly.

OK:

Registration procedure can be completed.

OK

END (KEY REGISTRATION FAILURE)
NG

REPLACE KEY THAT DTC IS OUTPUT
    Transponder Chip Malfunction (B2793,B2794,B2797,B2798)
    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 regis ...

    Push Switch / Key Unlock Warning Switch Malfunction (B2780)
    DESCRIPTION This DTC is stored if the transponder key ECU assembly does not detect that the unlock warning switch assembly is on even when the ignition switch is ON. DTC No. ...

    Other materials:

    Toyota CH-R Service Manual > Blind Spot Monitor System: Parts Location
    PARTS LOCATION ILLUSTRATION *1 OUTER REAR VIEW MIRROR ASSEMBLY LH *2 OUTER REAR VIEW MIRROR ASSEMBLY RH *3 BRAKE ACTUATOR ASSEMBLY - SKID CONTROL ECU *4 ECM ILLUSTRATION *1 ...

    Toyota CH-R Service Manual > Pre-collision System: Other System Malfunction (C1A63)
    DESCRIPTION The millimeter wave radar sensor receives the throttle signal from the ECM and judges whether the driver is making an acceleration request. When the ECM detects an electronic throttle malfunction, it informs the millimeter wave radar sensor via CAN communication and sets DTC C1A63. ...

    Toyota C-HR (AX20) 2023-2026 Owner's Manual

    Toyota CH-R Owners Manual

    Toyota CH-R Service Manual

    © 2017-2026 Copyright www.tochr.net
    0.0084