ENTRY AND START SYSTEM(for Start Function), Diagnostic DTC:B2284

DTC Code	DTC Name
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.

Tech Tips

When the cable is disconnected and reconnected to the negative (-) auxiliary 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.	AM2 fuse STOP fuse Electronically controlled brake system CAN communication system Power management control ECU Harness or connector	Connect the cable to the negative (-) auxiliary battery terminal, release the brake pedal and wait 20 seconds or more. Then depress the brake pedal for 20 seconds or more.

*: Only detected while a malfunction is present and the power 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 a hybrid control system start operation is performed, the hybrid control system does not start (the entry indicator in the combination meter assembly does not illuminates in green). However, the hybrid control system can be started by turning the power switch on (ACC) and then pressing and holding it. If there is a malfunction when the direct line is on, the hybrid control system can be started by pressing the power switch with the brake pedal released. If there is a malfunction when the direct line is off, the hybrid control system cannot be started by pressing the power switch with the brake pedal depressed.	-

Related Data List and Active Test Items
DTC	Data List Item	Active Test Item
B2284	Power Source Control Stop Light Switch1 ABS/VSC/TRAC Stop Light SW	-

WIRING DIAGRAM

CAUTION / NOTICE / HINT

Note

When using the GTS with the vehicle power switch off, connect the GTS to the vehicle 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 Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry & Start(CAN). 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.
The entry and start system uses multiplex communication. First perform the inspections in "How to Proceed with Troubleshooting" to confirm that there are no communication malfunctions before proceeding with troubleshooting Click here.
Before replacing the power management control ECU, refer to the entry and start system (for Entry Function) precaution Click here.
After performing repairs, perform the operation that fulfills the DTC output confirmation operation, and then confirm that no DTCs are output again.
Inspect the fuses of circuits related to this system before performing the following inspection procedure.

Tech Tips

Check the connector connection to the terminal to make sure that there is no abnormality such as a loose connection, deformation, etc.

PROCEDURE

READ VALUE USING GTS (STOP LIGHT SWITCH1)

Connect the GTS to the DLC3.
Turn the power switch on (IG).
Turn the GTS on.
Enter the following menus: Body Electrical / Power Source Control / Data List.

According to the display on the GTS, read the Data List.

Power Source Control
Tester Display	Measurement Item/Range	Normal Condition	Specified Condition
Stop Light Switch1	Stop light switch1/ON or OFF	ON: Brake pedal depressed OFF: Brake pedal released	Use this item to determine whether the stop light switch is malfunctioning. The hybrid control system cannot be started when this item is OFF. When this item is malfunctioning, the hybrid control system can be started by pressing and holding the power switch for a certain period of time.

OK
ON (brake pedal is depressed) and OFF (brake pedal is released) appear on the screen.

GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here

CHECK HARNESS AND CONNECTOR (POWER SOURCE)

Text in Illustration

*a
Front view of wire harness connector

(to Power Management Control ECU)

Disconnect the power management control ECU connectors.

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

Standard Voltage

Tester Connection	Switch Condition	Specified Condition
F55-1 (AM22) - Body ground	Power switch off	11 to 14 V
F56-7 (AM21) - Body ground	Power switch off	11 to 14 V

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

CHECK HARNESS AND CONNECTOR (GROUND)

Text in Illustration
*a	Front view of wire harness connector (to Power Management Control ECU)

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

Standard Resistance

Tester Connection	Condition	Specified Condition
F55-5 (E01) - Body ground	Always	Below 1 Ω
F55-6 (E1) - Body ground	Always	Below 1 Ω
F56-5 (E02) - Body ground	Always	Below 1 Ω

REPAIR OR REPLACE HARNESS OR CONNECTOR

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

Disconnect the A22*1 or A23*2 stop light switch assembly connector.
- *1: for LED Type Stop Light
- *2: for Bulb Type Stop Light