DTC P1631-81: Communication Error from ECM to VSC Invalid Serial Data Received [08/2020 - ]: Description
WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2024 Lexus ES 350, 2024 Lexus ES 250, 2023 Lexus ES 350, 2023 Lexus ES 250, and 2022 Lexus ES 350. However, it is still accessible from the selected car via links, so may be relevant.
The skid control ECU (brake actuator assembly) sends signals such as brake request signals to the ECM. When the ECM detects logic error signals sent from the skid control ECU (brake actuator assembly) for a certain period of time, DTC P1631-81 is stored.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | DTC Output from |
|---|---|---|---|---|---|
| P1631-81 | Communication Error from ECM to VSC Invalid Serial Data Received | When the engine switch is on (IG) and the dynamic radar cruise control system is operating, the ECM detects logic error signals sent from the skid control ECU (brake actuator assembly) for approximately 1 second or more. |
|
Does not come on | Engine |