Dtc B2284 Brake Signal Malfunction

Engine. Camry. Acv40 Gsv40
2Gr-Fe Starting. Camry. Acv40 Gsv40

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING INTELLIGENT TESTER (STOP LIGHT SWITCH)

CHECK DTC OUTPUT (CAN COMMUNICATION SYSTEM)

CHECK DTC OUTPUT (ENGINE CONTROL SYSTEM)

INSPECT FUSE (STOP SW)

CHECK HARNESS AND CONNECTOR (BATTERY - MAIN BODY ECU)

INSPECT STOP LIGHT SWITCH

DTC B2284 Brake Signal Malfunction


DESCRIPTION

This DTC is output when: 1) the brake signal circuit between the main body ECU and the stop light switch is malfunctioning; and 2) the CAN information is inconsistent.
HINT:
When the main body ECU is replaced with a new one and the negative (-) battery terminal is connected, 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.
After the main body ECU is replaced, perform the registration procedures for the engine immobiliser system.

DTC No.
DTC Detection Condition
Trouble Area
B2284
Communication or communication line is abnormal between the main body ECU and the stop light switch
  1. Stop light switch
  2. CAN communication system
  3. ECM
  4. Main body ECU
  5. Wire harness or connector

WIRING DIAGRAM


Camry. Acv40 Gsv40.2Gr-Fe Starting.Starting System. Dtc B2284 Brake Signal Malfunction


INSPECTION PROCEDURE


EMERGENCY ENGINE START CONTROL

  1. If there is a malfunction in the stop light switch or STOP fuse, their signals may not be correctly transmitted to the main body ECU. This may result in the engine not starting even if the engine switch is pressed while the brake pedal is depressed and the shift lever is in the P position.
    To activate the starter:

    1. Turn the engine switch from off to on (ACC).

    2. Press and hold the engine switch for 15 seconds.

HINT:
Before performing the inspection, depress the brake pedal and check that the stop lights come on. If the stop lights do not come on when the brake pedal is depressed, refer to the page shown in the brackets (CAMRY_ACV40 RM000002CE201SX.html).
1.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 / Body / Data List.

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

    Body:
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Stop Light SW
    		Stop light switch/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.


NG
Go to step 4
OK


2.CHECK DTC OUTPUT (CAN COMMUNICATION SYSTEM)

  1. Clear the DTCs (CAMRY_ACV40 RM000000YEH05QX.html).

  1. Check for CAN communication system DTCs (for LHD: CAMRY_ACV40 RM000000WI605LX.html) (for RHD: CAMRY_ACV40 RM000000WI605KX.html).

    HINT:
    If the DTCs for the CAN communication system malfunction are output, inspect those DTCs first.
    Result:
    Result
    		Proceed to
    DTC is not output
    		A
    CAN DTCs are output (for LHD)
    		B
    CAN DTCs are output (for RHD)
    		C


B
GO TO CAN COMMUNICATION SYSTEM (CAMRY_ACV40 RM000000WIB05NX.html)

C
GO TO CAN COMMUNICATION SYSTEM (CAMRY_ACV40 RM000000WIB05SX.html)
A


3.CHECK DTC OUTPUT (ENGINE CONTROL SYSTEM)

  1. Clear the DTCs (CAMRY_ACV40 RM000000YEH05QX.html).

  1. Check for DTC P0500 and P0503 (CAMRY_ACV40 RM000000W8E04DX.html).

    OK:
    DTC is not output.


NG
GO TO ENGINE CONTROL SYSTEM
OK

REPLACE MAIN BODY ECU

4.INSPECT FUSE (STOP SW)

  1. Remove the STOP SW fuse from the instrument panel J/B.

  1. Measure the resistance of the fuse.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    STOP fuse
    		Always
    		Below 1 Ω


NG
REPLACE FUSE (STOP)
OK


5.CHECK HARNESS AND CONNECTOR (BATTERY - MAIN BODY ECU)


    Camry. Acv40 Gsv40.2Gr-Fe Starting.Starting System. Dtc B2284 Brake Signal Malfunction

  1. Disconnect the IL ECU connector.

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    IL-7 - Body ground
    		Brake pedal released
    		Below 1 V
    IL-7 - Body ground
    		Brake pedal depressed
    		11 to 14 V


OK
REPAIR OR REPLACE HARNESS OR CONNECTOR
NG


6.INSPECT STOP LIGHT SWITCH


    Camry. Acv40 Gsv40.2Gr-Fe Starting.Starting System. Dtc B2284 Brake Signal Malfunction

  1. Remove the switch (CAMRY_ACV40 RM000001WI400WX.html).

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    1 - 2
    		Switch pin free
    		Below 1 Ω
    3 - 4
    		Switch pin free
    		10 kΩ or higher
    1 - 2
    		Switch pin pushed in
    		10 kΩ or higher
    3 - 4
    		Switch pin pushed in
    		Below 1 Ω


NG
REPLACE STOP LIGHT SWITCH (CAMRY_ACV40 RM000001WI400WX.html)
OK

REPLACE MAIN BODY ECU