DTC P1631-81: Communication Error from ECM to VSC Invalid Serial Data Received [09/2017 - 05/2019]: Description
The ECM sends signals such as A/T information signals, dynamic radar cruise control operation signals, brake operation demand signals, and buzzer operation demand signals to the skid control ECU (brake actuator assembly) when the dynamic radar cruise control is operating. Therefore, if the skid control ECU (brake actuator assembly) detects a communication error with the ECM, it sends a malfunction signal back to the ECM.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| P163181 | Communication Error from ECM to VSC Invalid Serial Data Received | While the vehicle speed is 5 km/h (3 mph) or more and the dynamic radar cruise control system is operating, the ECM continuously receives a logical error signal from the skid control ECU (brake actuator assembly) for approximately 1 second or more. |
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