THEFT DETERRENT / KEYLESS ENTRY ENTRY AND START SYSTEM(for Start Function) 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*) | ·
Electronically controlled brake system ·
Stop light switch assembly ·
Certification ECU (smart key ECU assembly) ·
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.
| 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 |
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. 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.
·Before replacing the certification ECU (smart key ECU assembly), refer to the Service Bulletin.
·After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".
·Check the electronically controlled brake system before performing the following procedure.
w/ VSC OFF Switch:
w/o VSC OFF Switch:
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 (w/ VSC OFF Switch) OK (w/o VSC OFF Switch) NG
OK (w/ VSC OFF Switch)
OK (w/o VSC OFF Switch)
NG
Disconnect the N155 certification ECU (smart key ECU assembly) connector.
Disconnect the M2 stop light switch assembly connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition N155-25 (STP1) - M2-3 (L) Always Below 1 Ω
- Result:
Proceed to OK NG
OK
NG
Reconnect the certification ECU (smart Key ECU assembly) connector.
Reconnect the M2 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 M155-25 (STP1) - Body ground Brake pedal released → depressed 1 V or less → 9 V or higher
- Result:
Proceed to OK NG
OK
NG