THEFT DETERRENT / KEYLESS ENTRY SMART ENTRY AND START SYSTEM(for Start Function, Gasoline Model (NR Series)) 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*) | ·
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 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 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. |
- |
| DTC No. | Data List and Active Test |
|---|---|
| B2284 | Power Source Control
·
Stop Light Switch1 Engine
·
Stop Light SW |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
- NOTICE:
- ·
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 smart 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 smart entry and start system (for Start Function) after confirming that the communication systems are functioning properly.
·Inspect the fuses for circuits related to this system before performing the following procedure.
·Before replacing the certification ECU (smart key ECU assembly), refer to Service Bulletin.
·After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".
PROCEDURE
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 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 - 50003 223 3
- OK:
The GTS display changes correctly in response to the brake pedal operation.
- Result:
Proceed to OK NG
OK
NG
Disconnect the O61 certification ECU (smart key ECU assembly) connector.
Disconnect the A53 stop light switch assembly connector.
Disconnect the A46 ECM connector.
Disconnect the A51 skid control ECU (brake actuator assembly) connector.
Disconnect the I18 shift lock control unit assembly connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition O61-24 (STP1) - A53-3 (L) Always Below 1 Ω
- Result:
Proceed to OK NG
OK
NG
Connect the O61 certification ECU (smart key ECU assembly) connector.
Connect the A53 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 O61-24 (STP1) - Body ground Brake pedal released → depressed 1 V or less → 9 V or higher
- Result:
Proceed to OK NG
OK
NG