Last Modified: 04-05-2023 |
6.11:8.1.0 |
Doc ID: RM100000000VJJK |
Model Year Start: 2016 |
Model: Sienna |
Prod Date Range: [12/2015 - 08/2016] |
Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM(for Start Function): B2284; Brake Signal Malfunction; 2016 MY Sienna [12/2015 - 08/2016] |
DTC
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B2284
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Brake Signal Malfunction
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DESCRIPTION
This DTC is stored when a mismatch between the brake signal from the direct line and the brake signal sent via CAN communication is detected.
HINT:
-
When the power management control ECU is replaced with a new one and the cable is connected to the negative (-) battery terminal, the power source mode changes to on (IG).
-
When the battery cable is disconnected and reconnected, the power source returns to the mode it was in before the battery cable was disconnected.
DTC Code
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DTC Detection Condition
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Trouble Area
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DTC Output Confirmation Operation
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B2284
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The brake signal information from the direct line and the brake signal information from the ECU via CAN communication are inconsistent (1-trip detection logic*).
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STOP fuse
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AM2 No. 2 fuse
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Stop light switch assembly
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Engine control system
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Power management control ECU
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Harness or connector
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Connect the cable to the negative (-) battery terminal, turn the brakes off for 20 seconds or more and then turn them on for 20 seconds or more.
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-
*: Only output 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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When the key is inside the vehicle, the engine does not start even though an engine start operation is performed (the engine switch indicator does not illuminate in green). However, if the engine switch is pressed and held for a certain period of time after the power source mode is changed to on (ACC), the engine can be started.
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When a direct line ON malfunction is present, the engine can be started by pressing the engine switch even if the brakes are off.
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When a direct line OFF malfunction is present, the engine cannot be started by pressing the engine switch even if the brakes are on.
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-
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WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
-
When using the Techstream with the engine switch off, perform either of the following: 1) Turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and vehicle begins, or 2) connect the Techstream to the vehicle, select the vehicle type under manual mode, and then enter the following menus: Body Electrical / Smart Key / Trouble Codes.
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The smart key system uses multiplex communication. First perform the inspections in "How to Proceed with Troubleshooting" to confirm that there are no communication malfunctions before proceeding with troubleshooting (See page
).
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Inspect the fuses of circuits related to this system before performing the following inspection procedure.
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After performing repairs, perform the operation that fulfills the DTC output confirmation operation, and then confirm that no DTCs are output again.
Related Data List and Active Test Items
DTC
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Data List Item
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Active Test Item
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B2284
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Powertrain / Engine and ECT
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-
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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) According to the display on the Techstream, read the Data List.
Power Source Control
Tester Display
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Measurement Item/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/ON or OFF
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ON: Brake pedal depressed
OFF: Brake pedal released
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-
Use this item to determine whether the stop light switch is malfunctioning.
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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.
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OK:
ON (brake pedal depressed) or OFF (brake pedal released) appears on the screen according to the stop light switch condition.
NG
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|
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2.
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CHECK HARNESS AND CONNECTOR (BATTERY - POWER MANAGEMENT CONTROL ECU)
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NG |
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REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE
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OK
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|
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3.
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CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND)
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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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4.
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CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - STOP LIGHT SWITCH ASSEMBLY)
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(a) Disconnect the A35 power management control ECU connector.
(b) Disconnect the A58*1 or A59*2 stop light switch assembly connector.
-
*1: for Bulb Type Stop Light
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*2: for LED Type Stop Light
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
for Bulb Type Stop Light
Tester Connection
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Condition
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Specified Condition
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A35-11 (STP1) - A58-1
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Always
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Below 1 Ω
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A35-11 (STP1) or A58-1 - Body ground
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Always
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10 kΩ or higher
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for LED Type Stop Light
Tester Connection
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Condition
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Specified Condition
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A35-11 (STP1) - A59-2 (L)
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Always
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Below 1 Ω
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A35-11 (STP1) or A59-2 (L) - Body ground
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Always
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10 kΩ or higher
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(d) Reconnect the A58*1 or A59*2 stop light switch assembly connector.
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*1: for Bulb Type Stop Light
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*2: for LED Type Stop Light
(e) 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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A35-11 (STP1) - Body ground
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Brake pedal not depressed
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Below 1 V
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Brake pedal depressed
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([Voltage at terminal AM21 or AM22] minus 2.0 V) or higher
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Text in Illustration
*a
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Rear view of wire harness connector
(to Power Management Control ECU)
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|
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NG |
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REPAIR OR REPLACE HARNESS OR CONNECTOR
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