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*) |
- Electronically controlled brake system
- Stop light switch assembly
- Certification ECU (smart key ECU assembly)
- Wire harness or connector
|
- Connect the cable to the negative (-) auxiliary 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 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 key indicator display is not displayed on the
multi-information display). 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 brake signal sent via 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 brake signal sent via 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 No. | Data List and Active Test | |
B2284 | Power Source Control
Hybrid Control
| WIRING DIAGRAM
 CAUTION / NOTICE / HINT
NOTICE:
- When using the Techstream with the power 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, HV 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, HV 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 power 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 hybrid control system cannot be started when this item is OFF.
- If the stop light switch assembly is malfunctioning, the hybrid control
system can be started by pressing and holding the power 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 ELECTRONICALLY CONTROLLED BRAKE 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 A35 skid control ECU (brake booster with master cylinder assembly) connector.
(d) Disconnect the A23 hybrid vehicle control ECU connector. (e) 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 | | 
