Dtc B2284 Brake Signal Malfunction

Vehicle Interior. Land Cruiser. Urj200, 202 Grj200 Vdj200
Theft Deterrent Keyless Entry. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING GTS (STOP LIGHT SWITCH 1)

CHECK HARNESS AND CONNECTOR (POWER SOURCE)

CHECK HARNESS AND CONNECTOR (GROUND)

CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - STOP LIGHT SWITCH ASSEMBLY)

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

DTC B2284 Brake Signal Malfunction


DESCRIPTION

This DTC is stored when the brake signal sent via direct line and the brake signal sent via CAN communication do not match.
HINT:
When the cable is disconnected and reconnected to the negative (-) battery terminal, the power source mode returns to the state it was in before the cable was disconnected.

DTC Code
DTC Detection Condition
Trouble Area
DTC Output Confirmation Operation
B2284
The brake signal sent via direct line and the brake signal sent via CAN communication (1-trip detection logic*) do not match.
  1. AM2 fuse
  2. STOP fuse
  3. SFI system
  4. ECD system
  5. Certification ECU (smart key ECU assembly)
  6. Harness or connector
Connect the cable to the negative (-) battery terminal, release the brake pedal and wait 20 seconds or more. Then depress the brake pedal for 20 seconds or more.
  1. *: Only detected while a malfunction is present and the engine switch is on (IG)

Vehicle Condition and Fail-safe Function when Malfunction Detected
Vehicle Condition when Malfunction Detected
Fail-safe Function when Malfunction Detected
With the electrical key transmitter sub-assembly in the cabin, even if an engine start operation is performed, the engine does not start (the indicator in the combination meter is not illuminated in green). However, the engine can be started by turning the engine switch on (ACC) and then pressing and holding it.
  1. If there is a malfunction when the direct line is on, the engine can be started by pressing the engine switch with the brake pedal released.
  2. If there is a malfunction when the direct line is off, the engine cannot be started by pressing the engine switch with the brake pedal depressed.
-

Related Data List and Active Test Items
DTC
Data List Item
Active Test Item
B2284
Power Source Control
  1. Stop Light Switch1
-

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Theft Deterrent Keyless Entry.Entry And Start System (For Entry Function). Dtc B2284 Brake Signal Malfunction


INSPECTION PROCEDURE

HINT:
Check the connector connection to the terminal to make sure that there is no abnormality such as a loose connection, deformation, etc.
NOTICE:
  1. When using the GTS with the engine switch off, connect the GTS to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus:
    Body Electrical / Entry&Start. While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.
  2. The entry and start system (for Start Function) uses a multiplex communication system (LIN communication system) and the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting (Click here). Troubleshoot the entry and start system (for Start Function) after confirming that the communication systems are functioning properly.
  3. Before replacing the certification ECU (smart key ECU assembly) or ECM, refer to the entry and start system (for Start Function) precaution (Click here).
  4. Inspect the fuses of circuits related to this system before performing the following inspection procedure.
  5. After performing repairs, perform the operation that fulfills the DTC output confirmation operation, and then confirm that no DTCs are output again.
1.READ VALUE USING GTS (STOP LIGHT SWITCH 1)

  1. Connect the GTS to the DLC3.

  1. Turn the engine switch on (IG).

  1. Turn the GTS on.

  1. Enter the following menus: Body Electrical / Power Source Control / Data List.

  1. Read the Data List according to the display on the GTS.

    Power Source Control
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Specified Condition
    Stop Light Switch1
    		State of brake pedal/ON or OFF
    		ON: Brake pedal depressed
    OFF: Brake pedal released
    1. Use this item to determine whether the stop light switch is malfunctioning.
    2. The engine cannot be started when this item is OFF.
    3. When this item is malfunctioning, the engine can be started by pressing and holding the engine switch for a certain period of time.
    OK:
    The GTS display changes correctly in response to the brake pedal operation.
    Result
    Result
    		Proceed to
    OK
    		A
    NG
    		for SFI system
    		B
    for ECD system
    		C
    HINT:
    1. For the SFI SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING), refer to the following:
      1. for 1GR-FE: Click here .
      2. for 1UR-FE: Click here.
      3. for 3UR-FE: Click here.
    1. For the ECD SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING), refer to the following:
      1. for 1VD-FTV (w/ DPF): Click here.
      2. for 1VD-FTV (w/o DPF): Click here.


B
GO TO SFI SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

C
GO TO ECD SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)
A


2.CHECK HARNESS AND CONNECTOR (POWER SOURCE)

  1. Disconnect the E130 certification ECU (smart key ECU assembly) connector.



    Land Cruiser. Urj200, 202 Grj200 Vdj200.Theft Deterrent Keyless Entry.Entry And Start System (For Entry Function). Dtc B2284 Brake Signal Malfunction

  1. Measure the voltage according to the value(s) in the table below.

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    E130-10 (+B) - Body ground
    		Always
    		11 to 14 V
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Certification ECU (smart key ECU assembly))


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE
OK


3.CHECK HARNESS AND CONNECTOR (GROUND)

  1. Disconnect the E130 certification ECU (smart key ECU assembly) connector.



    Land Cruiser. Urj200, 202 Grj200 Vdj200.Theft Deterrent Keyless Entry.Entry And Start System (For Entry Function). Dtc B2284 Brake Signal Malfunction

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		 Specified Condition
    E130-11 (E) - Body ground
    		Always
    		Below 1 Ω
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Certification ECU (smart key ECU assembly))


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - STOP LIGHT SWITCH ASSEMBLY)

  1. Disconnect the E128 certification ECU (smart Key ECU assembly) connector.

  1. Disconnect the A73 connector from the stop light switch assembly.



    Land Cruiser. Urj200, 202 Grj200 Vdj200.Theft Deterrent Keyless Entry.Entry And Start System (For Entry Function). Dtc B2284 Brake Signal Malfunction

  1. Measure the voltage and resistance according to the value(s) in the table below.

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    A73-1 (B) - Body ground
    		Always
    		11 to 14 V
    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E128-2 (STP1) - A73-2 (L)
    		Always
    		Below 1 Ω
    A73-3 (GND) - Body ground
    		Always
    		Below 1 Ω
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Stop Light Switch Assembly)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

  1. Reconnect the E128 and E130 certification ECU (smart Key ECU assembly) connectors.

  1. Reconnect the A73 connectors from the stop light switch assembly.



    Land Cruiser. Urj200, 202 Grj200 Vdj200.Theft Deterrent Keyless Entry.Entry And Start System (For Entry Function). Dtc B2284 Brake Signal Malfunction

  1. Measure the voltage according to the value(s) in the table below.

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    E128-2 (STP1) - Body ground
    		Brake pedal released → depressed
    		1 V or less → 9 V or higher
    Text in Illustration
    *a
    		Component with harness connected
    (Certification ECU (Smart Key ECU Assembly))


NG
REPLACE STOP LIGHT SWITCH ASSEMBLY (Click here)
OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)