Land Cruiser URJ200 URJ202 GRJ200 VDJ200 - THEFT DETERRENT / KEYLESS ENTRY

DESCRIPTION

INSPECTION PROCEDURE

CLEAR DTC

CHECK FOR DTC

CHECK CONNECTION OF CONNECTOR

REPLACE TRANSPONDER KEY AMPLIFIER

DTC B2793 Transponder Chip Malfunction

DTC B2794 Unmatched Encryption Code

DTC B2797 Communication Malfunction No. 1

DTC B2798 Communication Malfunction No. 2

DESCRIPTION

DTC B2793 is stored when a malfunction is found in the key during key code registration or a key code is not registered normally. Replace the key if key code registration cannot be performed normally and this DTC is output.
DTC B2794 is stored when a key with an incomplete key 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.
DTC CodeDTC Detection ConditionTrouble AreaDTC Output Confirmation Operation
B2793A transponder chip malfunction (1 trip detection logic*).
Key
Harness or connector
Transponder key amplifier
Transponder key ECU assembly
Insert the key into the ignition key cylinder.
B2794A key with an incomplete key code is inserted into the ignition key cylinder (1 trip detection logic*).
B2797A key with a Bcc malfunction is inserted into the ignition key cylinder (1 trip detection logic*).
B2798Key code identification cannot be completed within the specified time (1 trip detection logic*).
*: Only output while a malfunction is present.
Vehicle Condition and Fail-safe Operation when Malfunction Detected
Vehicle Condition when Malfunction DetectedFail-safe Operation When Malfunction Detected
Engine cannot be started-
Related Data List and Active Test
DTC CodeData List and Active Test
B2793Abnormal Status
B2794Different Encrypt Code
B2797Bcc Malfunction
B2798Frame Error

INSPECTION PROCEDURE

  • NOTICE:
When replacing the key and transponder key ECU assembly, refer to the Service Bulletin.
After performing repairs, perform the operation that fulfills the DTC output confirmation operation, and then confirm that no DTCs are output again.
1.CLEAR DTC

Clear the DTCs ().

NEXT
2.CHECK FOR DTC

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

  • HINT:
Before checking for DTCs, perform the "DTC Output Confirmation Operation" procedure.
If a DTC is output, clear the DTCs before checking the next key.
  • OK:
  • DTCs B2793, B2974, B2797 and B2798 are not output.
Result
Result Proceed to
OKA
NG (all keys)B
NG (any key)C
B
Go to step 3
C
REPLACE KEY THAT CANNOT START ENGINE
A
USE SIMULATION METHOD TO CHECK ()
3.CHECK CONNECTION OF CONNECTOR

Check that the connectors are properly connected to the transponder key amplifier.

Check that the engine starts with the key.

  • OK:
  • Engine starts.
NG
Go to step 4
OK
END (CONNECTOR WAS NOT CONNECTED PROPERLY)
4.REPLACE TRANSPONDER KEY AMPLIFIER

Clear the DTCs. ().

Replace the transponder key amplifier ().

Check that the engine starts with the key.

  • OK:
  • Engine starts.
NG
REPLACE TRANSPONDER KEY ECU ASSEMBLY
OK
END (TRANSPONDER KEY AMPLIFIER WAS DEFECTIVE)
THEFT DETERRENT / KEYLESS ENTRY
Land Cruiser URJ200 URJ202 GRJ200 VDJ200
ENGINE IMMOBILISER SYSTEM w/o Entry and Start System