DTC B2278-62: Engine/Power Switch Signal Compare Failure [10/2022 - ]: Description
WARNING: This page is about a different car, the 2025 Lexus RX 350, 2024 Lexus RX 350, and 2023 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.
This DTC is stored when the SSW1 contact signal, SSW2 contact signal and SSW3 contact signal, which are detected when the engine switch is operated, do not match.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | DTC Output from | Priority | Note |
|---|---|---|---|---|---|---|
| B2278-62 | Engine/Power Switch Signal Compare Failure | When the engine switch is operated, the SSW1 contact signal, SSW2 contact signal and SSW3 contact signal do not match. |
|
Power Source Control | A | DTC Output Confirmation Operation:
|
VEHICLE CONDITION AND FAIL-SAFE FUNCTION WHEN MALFUNCTION DETECTED
| Vehicle Condition when Malfunction Detected | Fail-safe Function when Malfunction Detected |
|---|---|
| If there is a malfunction in only one of the terminals SS1, SS2 or SS3, the system can still operate normally. | When only one terminal malfunctions, that terminal is disabled and the system operates normally. |
RELATED DATA LIST AND ACTIVE TEST ITEMS
| DTC No. | Data List and Active Test |
|---|---|
| B2278-62 | Power Source Control
|