DTC P1630-81: Communication Error from VSC to ECM Invalid Serial Data Received [12/2019 - 09/2020]: Description

The skid control ECU (brake actuator assembly) sends signals such as brake request signals to the ECM. If an abnormal signal is detected, the ECM stores DTC P1630-81.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	DTC Output from
P1630-81	Communication Error from VSC to ECM Invalid Serial Data Received	w/ Full-speed Range Following Function: When the dynamic radar cruise control system is operating, the ECM detects abnormal data sent from the skid control ECU (brake actuator assembly) for approximately 1 second or more. w/o Full-speed Range Following Function: When the vehicle speed is 30 km/h (20 mph) or more and the dynamic radar cruise control system is operating, the ECM detects abnormal data sent from the skid control ECU (brake actuator assembly) for approximately 1 second or more.	Electronically controlled brake system ECM	Does not come on	ECM

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

DTC Output from

P1630-81

Communication Error from VSC to ECM Invalid Serial Data Received

w/ Full-speed Range Following Function:

When the dynamic radar cruise control system is operating, the ECM detects abnormal data sent from the skid control ECU (brake actuator assembly) for approximately 1 second or more.

w/o Full-speed Range Following Function:

When the vehicle speed is 30 km/h (20 mph) or more and the dynamic radar cruise control system is operating, the ECM detects abnormal data sent from the skid control ECU (brake actuator assembly) for approximately 1 second or more.

Electronically controlled brake system
ECM

Does not come on

ECM