DESCRIPTION
This DTC is stored when the brake signal sent via direct line and the brake signal sent via CAN communication do not match.
Tech Tips
When the cable is disconnected and reconnected to the negative (-) auxiliary battery terminal, the power source mode returns to the state it was in before the cable was disconnected.
DTC Code | DTC Detection Condition | Trouble Area | DTC Output Confirmation Operation |
---|---|---|---|
B2284 | The brake signal sent via direct line and the brake signal sent via CAN communication (1-trip detection logic*) do not match. |
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Connect the cable to the negative (-) auxiliary 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 power switch is on (IG)
Vehicle Condition when Malfunction Detected | Fail-safe Function when Malfunction Detected |
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With the electrical key transmitter sub-assembly in the cabin, even if an hybrid control system start operation is performed, the hybrid control system does not start (the multi-information display message (smart warning light) is not displayed). However, the hybrid control system can be started by turning the power switch on (ACC) and then pressing and holding it.
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WIRING DIAGRAM
INSPECTION PROCEDURE
Tech Tips
Check the connector connection to the terminal to make sure that there is no abnormality such as a loose connection, deformation, etc.
Note
When using the Techstream with the power 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:
for Power Source Control: Body Electrical / Power Source Control / DTC.
for Smart Key: Body Electrical / Smart Key / DTC.
The smart key system (for Start Function) uses a multiplex communication system (LIN communication system) and the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting Click here. Troubleshoot the smart key system (for Start Function) after confirming that the communication systems are functioning properly.
Inspect the fuses of circuits related to this system before performing the following inspection procedure.
After performing repairs, perform the operation that fulfills the DTC output confirmation operation, and then confirm that no DTCs are output again.
Tech Tips
DTC | Data List Item | Active Test Item |
---|---|---|
B2284 |
Power Source Control
ABS/VSC/TRAC |
- |
PROCEDURE
READ VALUE USING TECHSTREAM (STOP LIGHT SWITCH ASSEMBLY)
Connect the Techstream to the DLC3.
Turn the power switch on (IG).
Turn the Techstream on.
Enter the following menus: Body Electrical / Power Source Control / Data List.
Read the Data List according to the display on the Techstream.
Tester Display | Measurement Item/Range | Normal Condition | Specified Condition |
---|---|---|---|
Stop Light Switch1 | Stop light switch1/ON or OFF | ON: Brake pedal depressed OFF: Brake pedal released |
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OK |
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ON (brake pedal is depressed) and OFF (brake pedal is released) appear on the screen. |
NG |
OK |
GO TO BRAKE CONTROL SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here
CHECK HARNESS AND CONNECTOR (POWER SOURCE)
*a | Front view of wire harness connector (to Power Management Control ECU) |
Disconnect the I3 and I4 connector from the power management control ECU.
Measure the voltage according to the value(s) in the table below.
Standard Voltage | |||||||||
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NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE |
OK |
CHECK HARNESS AND CONNECTOR (GROUND)
*a | Front view of wire harness connector (to Power Management Control ECU) |
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||||||||
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NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - STOP LIGHT SWITCH ASSEMBLY)
Disconnect the A33 connector from the stop light switch assembly.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||
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Reconnect the A33 stop light switch assembly connector.
*a | Front view of wire harness connector (to Power Management Control ECU) |
Disconnect the A39 connector from the power management control ECU.
Measure the voltage according to the value(s) in the table below.
Standard Voltage | ||||||||
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|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
REPLACE POWER MANAGEMENT CONTROL ECU Click here