THEFT DETERRENT / KEYLESS ENTRY  SMART 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*)
·

SFI system

·

AM2 fuse

·

STOP fuse

·

Certification ECU (smart key ECU assembly)

·

Wire harness or connector

·

Stop light switch assembly


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).


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.


-

Related Data List and Active Test Items
DTC No. Data List Item Active Test Item
B2284
Power Source Control
·

Stop Light Switch1


Engine and ECT
·

ST1


-

WIRING DIAGRAM

B361495E17
0.24,0.406 2.073,0.604 1.833,0.198 10 false from Battery 0.271,1.229 2.104,1.427 1.833,0.198 10 false from Battery 2.385,0.573 2.823,0.792 0.438,0.219 10 false AM2 1.698,1.406 2.271,1.656 0.573,0.25 10 false STOP 2.448,2.01 3.021,2.26 0.573,0.25 10 false A1 2.438,2.167 3.552,2.656 1.115,0.49 10 false Stop Light Switch Assembly 3.958,1.146 4.271,1.344 0.313,0.198 10 false 18 2.458,1.135 2.771,1.333 0.313,0.198 10 false 1 3.438,1.125 3.75,1.323 0.313,0.198 10 false 2 4.052,0.323 4.365,0.521 0.313,0.198 10 false 2 3.979,2.156 4.292,2.354 0.313,0.198 10 false 11 4.24,0.438 4.552,0.635 0.313,0.198 10 false +B 4.25,1.25 4.74,1.5 0.49,0.25 10 false STP1 4.25,2.302 4.74,2.552 0.49,0.25 10 false E 6.094,2.01 6.583,2.26 0.49,0.25 10 false ECM 3.823,2.792 4.313,3.042 0.49,0.25 10 false E108 3.823,2.958 5.354,3.427 1.531,0.469 10 false Certification ECU (Smart Key ECU Assembly) 0.906,3.292 2.792,3.667 1.885,0.375 10 false : CAN Communication Line 3.448,1.583 3.76,1.781 0.313,0.198 10 false 3 2.656,1.24 3.146,1.49 0.49,0.25 10 false B 3.26,1.25 3.75,1.5 0.49,0.25 10 false L 3.042,1.719 3.531,1.969 0.49,0.25 10 false GND

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.

Click hereVehicle Interior>THEFT DETERRENT / KEYLESS ENTRY>SMART ENTRY AND START SYSTEM(for Start Function)>HOW TO PROCEED WITH TROUBLESHOOTING

·

Before replacing the certification ECU (smart key ECU assembly), refer to smart entry and start system (for Start Function) Precaution.

Click hereVehicle Interior>THEFT DETERRENT / KEYLESS ENTRY>SMART ENTRY AND START SYSTEM(for Start Function)>PRECAUTION

·

Inspect the fuses of circuits related to this system before performing the following procedure.

·

After performing repairs, perform the operation that fulfills the DTC output confirmation operation, and then confirm that no DTCs are output again.



HINT:

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

1.READ VALUE USING GTS (STOP LIGHT SWITCH1)
a.

Connect the GTS to the DLC3.


b.

Turn the engine switch on (IG).


c.

Turn the GTS on.


d.

Enter the following menus: Body Electrical / Power Source Control / Data List.


e.

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 ON or OFF ON: Brake pedal depressed
OFF: Brake pedal released
·

Use this item to determine whether the stop light switch is malfunctioning.

·

The engine cannot be started when this item is OFF.

·

When this item 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

2.CHECK HARNESS AND CONNECTOR (POWER SOURCE)

NG

GO TO SFI SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

Click hereEngine / Hybrid System>2ZR-FE ENGINE CONTROL>SFI SYSTEM>HOW TO PROCEED WITH TROUBLESHOOTING


2.CHECK HARNESS AND CONNECTOR (POWER SOURCE)

Click hereVehicle Interior>THEFT DETERRENT / KEYLESS ENTRY>SMART ENTRY AND START SYSTEM(for Start Function)>B2271

Result:
Proceed to
OK
NG



OK

3.CHECK HARNESS AND CONNECTOR (GROUND)

NG

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

3.CHECK HARNESS AND CONNECTOR (GROUND)

Click hereVehicle Interior>THEFT DETERRENT / KEYLESS ENTRY>SMART ENTRY AND START SYSTEM(for Start Function)>B2271

Result:
Proceed to
OK
NG



OK

4.INSPECT STOP LIGHT SWITCH ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.INSPECT STOP LIGHT SWITCH ASSEMBLY

Click hereVehicle Exterior>LIGHTING (EXT)>STOP LIGHT SWITCH>ON-VEHICLE INSPECTION

Result:
Proceed to
OK
NG



OK

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

NG

REPLACE STOP LIGHT SWITCH ASSEMBLY

Click hereVehicle Exterior>LIGHTING (EXT)>STOP LIGHT SWITCH>REMOVAL


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

Disconnect the A1 stop light switch assembly connector.


b.
B269097C33
0.344,1.979 0.802,2.26 0.458,0.281 1.354,2.323 0.979,2.833 false 0.073,0.156 0.406,0.396 0.333,0.24 10 false *a 0.406,2.031 0.854,2.292 0.448,0.26 10 false E108 0.792,2.854 1.219,3.094 0.427,0.24 10 false STP1
*a Rear view of wire harness connector
(to Certification ECU (Smart Key ECU Assembly))


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

Standard Resistance:
Tester Connection Condition Specified Condition
E108-18 (STP1) - A1-2 (L) Always Below 1 Ω
E108-18 (STP1) or A1-2 (L) - Body ground Always 10 kΩ or higher



c.

Reconnect the A1 stop light switch assembly connector.


d.

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

Standard Voltage:
Tester Connection Condition Specified Condition
E108-18 (STP1) - Body ground Brake pedal released 1 V or less
Brake pedal depressed 9 V or higher



Result:
Proceed to
OK
NG



OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR