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*) |
- Stop light switch assembly
- SFI system
- Certification ECU (smart key ECU assembly)
- Wire harness or connector
|
- Connect the cable to the negative (-) battery terminal, release the
brake pedal and wait at least 20 seconds. Then depress the brake pedal
for 20 seconds or more.
|
- *: Only detected while a malfunction is present and the engine 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 an
engine start operation is performed, the engine does not start (the key
indicator display is not displayed on the multi-information display).
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 brake signal sent via 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 brake signal sent via direct line is
off, the engine cannot be started by pressing the engine switch with the
brake pedal depressed.
| - | Related Data List and Active Test Items |
DTC No. | Data List and Active Test | |
B2284 | Power Source Control
Engine
| WIRING DIAGRAM
 CAUTION / NOTICE / HINT
NOTICE:
- When using the Techstream with the engine switch off, connect the
Techstream to the DLC3 and turn a courtesy light switch on and off at
intervals of 1.5 seconds or less until communication between the
Techstream and the vehicle begins. Then select the vehicle type under
manual mode and enter the following menus: Body Electrical / Smart Key.
While using the Techstream, periodically turn a courtesy light switch on
and off at intervals of 1.5 seconds or less to maintain communication
between the Techstream and the vehicle.
- The smart key system (for Start Function, Gasoline Model) uses the LIN
communication system and CAN communication system. Inspect the
communication function by following How to Proceed with Troubleshooting.
Troubleshoot the smart key system (for Start Function, Gasoline Model)
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 Registration.
Click here
- After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".
PROCEDURE |
1. | READ VALUE USING TECHSTREAM (STOP LIGHT SWITCH1) |
(a) Connect the Techstream to the DLC3. (b) Turn the engine switch on (IG).
(c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / Power Source Control / Data List.
(e) Read the Data List according to the display on the Techstream. 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 if the stop light switch assembly is malfunctioning.
- The engine cannot be started when this item is OFF.
- If the stop light switch assembly is malfunctioning, the engine can be
started by pressing and holding the engine switch for a certain period
of time.
| Body Electrical > Power Source Control > Data List
|
Tester Display | | Stop Light Switch1 |
OK: The Techstream display changes correctly in response to the brake pedal operation.
| OK |
 | GO TO SFI SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) |
|
NG |
 | |
| 2. |
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - STOP LIGHT SWITCH ASSEMBLY) |
(a) Disconnect the K10 certification ECU (smart key ECU assembly) connector.
(b) Disconnect the A33 stop light switch assembly connector. (c) Disconnect the A18 ECM connector.
(d) Disconnect the A28 skid control ECU (brake actuator assembly) connector.
(e) Disconnect the G21 shift lock control unit assembly connector. (f) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
K10-25 (STP1) - A33-3 (L) |
Always | Below 1 Ω |
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
OK | |
| |
| 3. |
CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
(a) Connect the K10 certification ECU (smart key ECU assembly) connector.
(b) Connect the A33 stop light switch assembly connector.
| (c) Measure the voltage according to the value(s) in the table below.
Standard Voltage: |
Tester Connection | Condition |
Specified Condition | |
K10-25 (STP1) - Body ground |
Brake pedal released → depressed |
1 V or less → 9 V or higher | |
 |
|
*a | Component with harness connected
(Certification ECU (Smart Key ECU Assembly)) | | |
| OK |
| REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
| NG |
| REPLACE STOP LIGHT SWITCH ASSEMBLY | | 
