DTC    B2284    Brake Signal Malfunction

for Preparation Click here


DESCRIPTION

The power management control ECU*1 or power source control ECU*2 receives brake signal information from 2 sources. It receives a signal from the stop light switch assembly via a direct line, and a signal from the ECM via CAN. If the information from these 2 sources is inconsistent, this DTC will be stored.

HINT:
When the power management control ECU*1 or power source control ECU*2 is replaced with a new one and the cable is connected to the negative (-) battery terminal, the power source mode becomes the IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.


DTC No.
DTC Detection Condition
Trouble Area
B2284
Stop light switch assembly operation information received by power management control ECU*1 or power source control ECU*2 from the stop light switch assembly via a direct line and stop light switch assembly information from the ECM via CAN are inconsistent.
  1. AM2 No. 2 fuse
  2. MAIN fuse
  3. STOP fuse
  4. ALT fuse
  5. Stop light switch assembly
  6. Power management control ECU*1
  7. Power source control ECU*2
  8. SFI system*1
  9. ECD system*2
  10. Wire harness or connector
*1: for 1KR-FE and 1NR-FE
*2: for 1ND-TV

WIRING DIAGRAM


B213282E02


INSPECTION PROCEDURE

NOTICE:
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 (POWER SOURCE)
C185500E33

  1. Disconnect the D38 or D73 ECU connector.

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

    1. for 1KR-FE and 1NR-FE

      Standard Voltage:
      Tester Connection
      		Condition
      		Specified Condition
      D38-2 (AM21) - Body ground
      		Always
      		9.5 to 16 V
      D38-1 (AM22) - Body ground

      Text in Illustration 
      *A
      		for 1KR-FE and 1NR-FE
      *B
      		for 1ND-TV
      *1
      		Rear view of wire harness connector
      (to Power Management Control ECU) (for 1KR-FE and 1NR-FE)
      *2
      		Rear view of wire harness connector
      (to Power Source Control ECU) (for 1ND-TV)

    2. for 1ND-TV

      Standard Voltage:
      Tester Connection
      		Condition
      		Specified Condition
      D73-2 (AM21) - Body ground
      		Always
      		9.5 to 16 V
      D73-1 (AM22) - Body ground



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


2.CHECK HARNESS AND CONNECTOR (GROUND)
C185500E34

  1. Disconnect the D38 or D73 ECU connector.

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

    1. for 1KR-FE and 1NR-FE

      Standard Resistance:
      Tester Connection
      		Condition
      		Specified Condition
      D38-6 (GND) - Body ground
      		Always
      		Below 1 Ω
      D38-5 (GND2) - Body ground

      Text in Illustration 
      *A
      		for 1KR-FE and 1NR-FE
      *B
      		for 1ND-TV
      *1
      		Rear view of wire harness connector
      (to Power Management Control ECU) (for 1KR-FE and 1NR-FE)
      *2
      		Rear view of wire harness connector
      (to Power Source Control ECU) (for 1ND-TV)

    2. for 1ND-TV

      Standard Resistance:
      Tester Connection
      		Condition
      		Specified Condition
      D73-6 (GND) - Body ground
      		Always
      		Below 1 Ω
      D73-5 (GND2) - Body ground



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.INSPECT STOP LIGHT SWITCH ASSEMBLY


    E168613E02

  1. Disconnect the stop light switch assembly connector.

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    1 - 2
    		Pushed
    		10 kΩ or higher
    3 - 4
    1 - 2
    		Not pushed
    		Below 1 Ω
    3 - 4



NG
REPLACE STOP LIGHT SWITCH ASSEMBLY
OK


4.CHECK HARNESS AND CONNECTOR (ECU - STOP LIGHT SWITCH ASSEMBLY)
B213322E02

  1. Disconnect the D36 or D72 ECU connector.

  1. Disconnect the stop light switch assembly connector.

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

    1. for 1KR-FE and 1NR-FE

      Standard Resistance:
      Tester Connection
      		Condition
      		Specified Condition
      D36-11 (STP1) - A27-1
      		Always
      		Below 1 Ω
      D36-11 (STP1) - Body ground
      		10 kΩ or higher

      Text in Illustration 
      *A
      		for 1KR-FE and 1NR-FE
      *B
      		for 1ND-TV
      *1
      		Rear view of wire harness connector
      (to Power Management Control ECU) (for 1KR-FE and 1NR-FE)
      *2
      		Rear view of wire harness connector
      (to Power Source Control ECU) (for 1ND-TV)
      *3
      		Front view of wire harness connector
      (to Stop Light Switch Assembly)

    2. for 1ND-TV

      Standard Resistance:
      Tester Connection
      		Condition
      		Specified Condition
      D72-11 (STP1) - 1
      		Always
      		Below 1 Ω
      D72-11 (STP1) - Body ground
      		10 kΩ or higher

  1. Reconnect the stop light switch assembly connector.

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

    1. for 1KR-FE and 1NR-FE

      Standard Voltage:
      Tester Connection
      		Brake Pedal Operation
      		Specified Condition
      D36-11 (STP1) - Body ground
      		Released
      		Below 1.0 V
      Depressed
      		Output voltage at terminal AM21 or AM22 -2.5 V or more

    2. for 1ND-TV

      Standard Voltage:
      Tester Connection
      		Brake Pedal Operation
      		Specified Condition
      D72-11 (STP1) - Body ground
      		Released
      		Below 1.0 V
      Depressed
      		Output voltage at terminal AM21 or AM22 -2 V or more



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


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

  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. Read the Data List according to the display on the intelligent tester.

    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) and OFF (brake pedal released) appear on the screen.

    Result 
    Result
    		Proceed to
    OK (for 1KR-FE)
    		A
    NG (for 1KR-FE and 1NR-FE)
    		B
    OK (for 1NR-FE)
    		C
    OK (for 1ND-TV)
    		C
    NG (for 1ND-TV)
    		D



B
REPLACE POWER MANAGEMENT CONTROL ECU (Click here)

C
GO TO SFI SYSTEM (Click here)

D
GO TO ECD SYSTEM (Click here)

E
REPLACE POWER SOURCE CONTROL ECU (Click here)
A

GO TO SFI SYSTEM (Click here)