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.


DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Note
B2284	Brake Signal Malfunction	The brake signal sent via direct line and the brake signal sent via CAN communication do not match. (1-trip detection logic*)	AM2 NO. 3 fuse STOP fuse Stop light switch assembly SFI system Certification ECU (smart key ECU assembly) Wire harness or connector	DTC Output Confirmation Operation: 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.

*: Only detected while a malfunction is present and the engine switch is on (IG).

Table 1. 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). However, the engine can be started by turning the engine switch on (ACC) and then pressing and holding it. 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. 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.	-

Table 2. Related Data List and Active Test Items
DTC No.	Data List and Active Test
B2284	Power Source Control Stop Light Switch1 Engine and ECT ST1

WIRING DIAGRAM

CAUTION / NOTICE / HINT

Note:

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 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 (for Start Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the entry and start system (for Start Function) after confirming that the communication systems are functioning properly.
Click here
Inspect the fuses of circuits related to this system before performing the following procedure.
Before replacing the certification ECU (smart key ECU assembly), refer to the entry and start system (for Start Function) Precaution.
Click here
After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".

Tip:

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.

PROCEDURE

READ VALUE USING GTS (STOP LIGHT SWITCH1)

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

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

Body Electrical > Power Source Control > Data List


Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Stop Light Switch1	State of brake pedal*	OFF or ON	OFF: Brake pedal released ON: Brake pedal depressed	Use this item to determine whether the stop light switch is malfunctioning. The engine cannot be started when this item is OFF. If the stop light switch is malfunctioning, the engine can be started by pressing and holding the engine switch for a certain period of time.

*: for Multi-Mode Manual Transaxle

Body Electrical > Power Source Control > Data List


Tester Display
Stop Light Switch1

The GTS display changes correctly in response to the brake pedal operation.

Result


Proceed to
OK
NG

GO TO SFI SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

for 1KR-FE:Click here

for 1PP:Click here

CHECK HARNESS AND CONNECTOR (POWER SOURCE)

Click here

Result


Proceed to
OK
NG

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

CHECK HARNESS AND CONNECTOR (GROUND)

Click here

Result


Proceed to
OK
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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

Disconnect the E49 certification ECU (smart Key ECU assembly) connector.
Disconnect the A20 stop light switch assembly connector.

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

Standard Resistance


Tester Connection	Condition	Specified Condition
E49-11 (STP1) - A20-1 (L)	Always	Below 1 Ω
E49-11 (STP1) or A20-1 (L) - Body ground	Always	10 kΩ or higher

Result


Proceed to
OK
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

INSPECT STOP LIGHT SWITCH ASSEMBLY

Remove the stop light switch assembly.
Click here
Inspect the stop light switch assembly.
Click here

Result


Proceed to
OK
NG

REPLACE STOP LIGHT SWITCH ASSEMBLY

Click here

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

Reconnect the E49 certification ECU (smart Key ECU assembly) connector.
Reconnect the A20 stop light switch assembly connector.

*a	Component with harness connected (Certification ECU (Smart Key ECU Assembly))

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

Standard Voltage


Tester Connection	Condition	Specified Condition
E49-11 (STP1) - Body ground	Brake pedal released → depressed	1 V or less → 9 V or higher

Result


Proceed to
OK
NG

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

REPAIR OR REPLACE HARNESS OR CONNECTOR