DTC B2284: Brake Signal Malfunction: Description
The power management control ECU receives brake signal information from 2 sources. It receives a signal from the stop light switch assembly via a direct line, and a signal from the skid control ECU assembly via CAN communication. If the information from these 2 sources is inconsistent, this DTC will be stored.
HINT:
- When the power management control ECU is replaced with a new one and the cable is connected to the negative (-) auxiliary battery terminal, the power source mode changes to on (IG).
- When the auxiliary battery cable is disconnected and reconnected, the power source returns to the mode it was in before the auxiliary battery cable was disconnected.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B2284 | Stop light switch assembly operation information received by the power management control ECU from the stop light switch assembly via a direct line and stop light switch assembly information from the skid control ECU assembly via CAN are inconsistent. |
|
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.
| DTC Code | DTC Detection Condition | Trouble Area | DTC Output Confirmation Operation |
|---|---|---|---|
| B2284 | 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*). |
|
Connect the cable to the negative (-) auxiliary battery terminal, turn the brakes off for 20 seconds or more and then turn them on for 20 seconds or more. |
- *: Only output while a malfunction is present and the power switch is on (IG)
VEHICLE CONDITION AND FAIL-SAFE FUNCTION WHEN MALFUNCTION DETECTED
| Vehicle Condition when Malfunction Detected | Fail-safe Function when Malfunction Detected |
|---|---|
When the key is inside the vehicle, the hybrid control system does not start even though a hybrid control system start operation is performed (the power switch indicator does not illuminate in green). However, if the power switch is pressed and held for a certain period of time after the power source mode is changed to on (ACC), the hybrid control system can be started.
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