Toyota Yaris: Dynamic Radar Cruise Control System / Communication Error from VSC to ECM Invalid Serial Data Received (P163081)

Toyota Yaris XP210 (2020-2024) Reapir and Service Manual / Engine & Hybrid System / Cruise Control / Dynamic Radar Cruise Control System / Communication Error from VSC to ECM Invalid Serial Data Received (P163081)

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 P163081.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	DTC Output from
P163081	Communication Error from VSC to ECM Invalid Serial Data Received	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.	Vehicle stability control system ECM	Radar Cruise1

CAUTION / NOTICE / HINT

NOTICE:

Before replacing the ECM, refer to Service Bulletin.

PROCEDURE

1.	CHECK FOR DTCs

(a) Check for vehicle stability control system DTCs.

Chassis > Brake > Trouble Codes

Result	Proceed to
Vehicle stability control system DTCs are not output	A
Vehicle stability control system DTCs are output	B

GO TO VEHICLE STABILITY CONTROL SYSTEM

CLEAR DTC

(a) Clear the DTCs.

Powertrain > Radar Cruise1 > Clear DTCs

3.	CHECK FOR DTCs

(a) Make sure that the DTC detection conditions are met.

HINT:

If the detection conditions are not met, the system cannot detect the malfunction.

(b) Check for DTCs.

Powertrain > Radar Cruise1 > Trouble Codes

Result	Proceed to
DTC P163081 is not output	A
DTC P163081 is output	B

USE SIMULATION METHOD TO CHECK

REPLACE ECM

Cruise Control Input Processor (P160700)

DESCRIPTION When the ECM detects that it is not functioning normally, DTC P160700 is stored. DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from P160700 Cruise Control Input Processor When the ignition switch is ON and control of vehicle speed by the dynamic radar cruise control system is prohibited by the sub-CPU, the dynamic radar cruise control system operates for 0...

Communication Error from ECM to VSC Invalid Serial Data Received (P163181)

DESCRIPTION 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 P163181 is stored...

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