Dtc B2284 Brake Signal Malfunction


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK HARNESS AND CONNECTOR (BATTERY - POWER MANAGEMENT CONTROL ECU)

CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND)

INSPECT STOP LIGHT SWITCH ASSEMBLY

CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - STOP LIGHT SWITCH ASSEMBLY)

READ VALUE USING INTELLIGENT TESTER (STOP LIGHT SWITCH)

CHECK SFI SYSTEM*1 OR ECD SYSTEM*2

DTC B2284 Brake Signal Malfunction


DESCRIPTION

This DTC is stored when the brake signal information from the cable and the brake signal information from the CAN communication line are inconsistent
HINT:
When the power management control ECU is replaced with a new one and the cable is connected to the negative (-) battery terminal, the power source mode is reset to on (IG). When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.

DTC Code
DTC Detection Condition
Trouble Area
B2284
The brake signal information from the cable and the brake signal information from the CAN communication line are inconsistent.
  1. STOP fuse
  2. AM2 fuse
  3. Stop light switch assembly
  4. Engine control system
  5. Power management control ECU
  6. Harness or connector

WIRING DIAGRAM


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Theft Deterrent Keyless Entry.Entry And Start System (For Entry Function). Dtc B2284 Brake Signal Malfunction


INSPECTION PROCEDURE

NOTICE:
  1. When using the intelligent tester with the engine switch off to troubleshoot: Connect the intelligent tester to the vehicle and turn a courtesy light switch on and off at 1.5 second intervals until communication between the intelligent tester and vehicle begins.
  2. Before performing the inspection, check that there are no problems related to the CAN communication system and LIN communication system.
  3. Inspect the fuses for circuits related to this system before performing the following inspection procedure.
HINT:
Check the connector connections and terminals to make sure that there are no abnormalities such as loose connections, deformation, etc.
1.CHECK HARNESS AND CONNECTOR (BATTERY - POWER MANAGEMENT CONTROL ECU)


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Theft Deterrent Keyless Entry.Entry And Start System (For Entry Function). Dtc B2284 Brake Signal Malfunction

  1. Disconnect the G51 power management control ECU connector.

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    G51-2 (AM21) - Body ground
    		Always
    		9.5 to 14 V
    G51-1 (AM22) - Body ground
    Text in Illustration
    *a
    		Rear view of wire harness connector
    (to Power Management Control ECU)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


2.CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND)

  1. Disconnect the G51 power management control ECU connector.



    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.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
    G51-6 (GND) - Body ground
    		Always
    		Below 1 Ω
    G51-5 (GND2) - Body ground
    Text in Illustration
    *a
    		Rear view of wire harness connector
    (to Power Management Control ECU)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.INSPECT STOP LIGHT SWITCH ASSEMBLY

  1. Inspect the stop light switch assembly (LandCruiser RM000003QJR00YX_01_0001.html).



NG
REPLACE STOP LIGHT SWITCH ASSEMBLY (LandCruiser RM000003QJT01GX.html)
OK


4.CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - STOP LIGHT SWITCH ASSEMBLY)

  1. Disconnect the G50 power management control ECU connector.

  1. Disconnect the A85 stop light switch assembly connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    G50-11 (STP1) - A85-2 (L)
    		Always
    		Below 1 Ω
    G50-11 (STP1) or A85-2 (L) - Body ground
    		Always
    		10 kΩ or higher
    A85-3 (GND) - Body ground
    		Always
    		Below 1 Ω


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Theft Deterrent Keyless Entry.Entry And Start System (For Entry Function). Dtc B2284 Brake Signal Malfunction

  1. Reconnect the A85 stop light switch assembly connector.

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    G50-11 (STP1) - Body ground
    		Brake pedal not depressed
    		Below 1 V
    Brake pedal depressed
    		([Voltage at terminal AM21 or AM22] minus 2.0 V) or higher
    Text in Illustration
    *a
    		Rear view of wire harness connector
    (to Power Management Control ECU)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.READ VALUE USING INTELLIGENT TESTER (STOP LIGHT SWITCH)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch on (IG).

  1. Turn the intelligent tester on.

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

  1. According to the display on the intelligent tester, read the Data List.

    Power Source Control
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Stop Light Switch1
    		Stop light switch 1 / ON or OFF
    		ON: Brake pedal depressed
    OFF: Brake pedal released
    		-
    OK:
    ON (brake pedal depressed) or OFF (brake pedal released) appears on the screen according to the stop light switch condition.


NG
Go to step 6
OK

REPLACE POWER MANAGEMENT CONTROL ECU (LandCruiser RM0000039R5026X.html)

6.CHECK SFI SYSTEM*1 OR ECD SYSTEM*2

  1. Check the SFI system*1 or ECD system*2.

    1. *1: for 1GR-FE and 2TR-FE
    2. *2: for 1KD-FTV and 1GD-FTV
Result
Result
Proceed to
OK (for 1GR-FE and 2TR-FE)
A
OK (for 1KD-FTV and 1GD-FTV)
B
NG
C
HINT:
  1. for 1GR-FE:
    If it is necessary to refer to the SFI system, refer to the following procedure (LandCruiser RM000000PD915IX.html).
  2. for 2TR-FE:
    If it is necessary to refer to the SFI system, refer to the following procedure (LandCruiser RM000000VNB00DX.html).
  3. for 1KD-FTV:
    If it is necessary to refer to the ECD system, refer to the following procedure (LandCruiser RM0000012WB0A9X.html).
  4. for 1GD-FTV:
    If it is necessary to refer to the ECD system, refer to the following procedure (LandCruiser RM0000012WB0ADX.html).
  5. for 1GD-FTV (w/ Urea SCR System):
    If it is necessary to refer to the ECD system, refer to the following procedure (LandCruiser RM0000012WB0ACX.html).


B
GO TO ECD SYSTEM
A

GO TO SFI SYSTEM