Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Communication Error from VSC to ECM Invalid Serial Data Received (P163081)

Lexus RX (RX 350L, RX450h) 2016-2025 Repair 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

MIL

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

Does not come on

Cruise Control

CAUTION / NOTICE / HINT

NOTICE:

Before replacing the ECM, refer to Registration.

Click here

PROCEDURE

1.

CHECK FOR DTCs

(a) Check for vehicle stability control system DTCs.

Chassis > Brake/EPB > Trouble Codes

Result

Proceed to

Vehicle stability control system DTCs are not output

A

Vehicle stability control system DTCs are output

B
B

GO TO VEHICLE STABILITY CONTROL SYSTEM

A

2.

CHECK FOR DTCs

(a) Clear the DTCs.

Powertrain > Cruise Control > Clear DTCs

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

HINT:

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

(c) Check for DTCs.

Powertrain > Cruise Control > Trouble Codes

Result

Proceed to

DTC P163081 is not output

A

DTC P163081 is output

B
A

USE SIMULATION METHOD TO CHECK

B

REPLACE ECM

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