Last Modified: 05-13-2024 |
6.11:8.1.0 |
Doc ID: RM1000000026A6K |
Model Year Start: 2023 |
Model: GR Corolla |
Prod Date Range: [09/2022 - 11/2022] |
Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function (Gasoline Model, TMMMS Made)): B2284; Brake Signal Malfunction; 2023 MY Corolla Corolla Hatchback GR Corolla [09/2022 - 11/2022] |
DTC
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B2284
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Brake Signal Malfunction
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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.
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Detection Item
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DTC Detection Condition
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Trouble Area
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Note
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B2284
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Brake Signal Malfunction
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The brake signal sent via direct line and the brake signal sent via CAN communication do not match. (1-trip detection logic*)
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-
Stop light switch assembly
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SFI system
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Certification ECU (smart key ECU assembly)
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Wire harness or connector
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DTC Output Confirmation Operation:
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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.
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-
*: 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
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Fail-safe Function when Malfunction Detected
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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.
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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.
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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.
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-
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Related Data List and Active Test Items
DTC No.
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Data List and Active Test
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B2284
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|
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.
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The smart key 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 key system (for Start Function) after confirming that the communication systems are functioning properly.
Click here
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Inspect the fuses for circuits related to this system before performing the following procedure.
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Before replacing the certification ECU (smart key ECU assembly), refer to Registration.
Click here
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After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".
PROCEDURE
1.
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READ VALUE USING TECHSTREAM (STOP LIGHT SWITCH1)
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(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
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Measurement Item
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Range
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Normal Condition
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Diagnostic Note
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Stop Light Switch1
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State of brake pedal
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OFF or ON
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OFF: Brake pedal released
ON: Brake pedal depressed
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-
Use this item to determine if the stop light switch assembly is malfunctioning.
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The engine cannot be started when this item is OFF.
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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.
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Body Electrical > Power Source Control > Data List
Tester Display
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Stop Light Switch1
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OK:
The Techstream display changes correctly in response to the brake pedal operation.
OK |
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GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)
w/ Electric Parking Brake System: Click here
w/o Electric Parking Brake System: Click here
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NG
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|
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2.
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CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - STOP LIGHT SWITCH ASSEMBLY)
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(a) Disconnect the O61 certification ECU (smart key ECU assembly) connector.
(b) Disconnect the A53 stop light switch assembly connector.
(c) Disconnect the A47*1 or A46*2 ECM connector.
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*1: for M20A-FKS
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*2: for 2ZR-FAE
(d) Disconnect the A51 skid control ECU (brake actuator assembly) connector.
(e) Disconnect the I17 shift lock control unit assembly connector.
(f) Disconnect the C80 transmission control ECU assembly connector.
(g) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
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Condition
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Specified Condition
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O61-24 (STP1) - A53-3 (L)
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Always
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Below 1 Ω
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NG |
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REPAIR OR REPLACE HARNESS OR CONNECTOR
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OK
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|
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3.
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CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
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(a) Connect the O61 certification ECU (smart key ECU assembly) connector.
(b) Connect the A53 stop light switch assembly connector.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection
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Condition
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Specified Condition
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O61-24 (STP1) - Body ground
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Brake pedal released → depressed
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1 V or less → 9 V or higher
|
|
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*a
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Component with harness connected
(Certification ECU (Smart Key ECU Assembly))
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|
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