Last Modified: 08-21-2023 6.11:8.1.0 Doc ID: RM100000001B56W
Model Year Start: 2019 Model: Avalon HV Prod Date Range: [04/2018 - 08/2021]
Title: CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM (for HV Model): P163081; Communication Error from VSC to ECM Invalid Serial Data Received; 2019 - 2021 MY Avalon HV [04/2018 - 08/2021]

DTC

P163081

Communication Error from VSC to ECM Invalid Serial Data Received

DESCRIPTION

The skid control ECU (brake booster with master cylinder assembly) sends signals such as cruise control cancel signals and brake demand response signals to the hybrid vehicle control ECU when the dynamic radar cruise control system is operating.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

P163081

Communication Error from VSC to ECM 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, communication data from the skid control ECU (brake booster with master cylinder assembly) is logically inconsistent for approximately 0.5 seconds or more.
  • CAN communication system
  • Skid control ECU (brake booster with master cylinder assembly)
  • Hybrid vehicle control ECU

Does not come on

CAUTION / NOTICE / HINT

NOTICE:

  • First check the CAN communication system by following How to Proceed with Troubleshooting. After checking that there are no malfunctions in the CAN communication system, proceed with troubleshooting.

    Click here 2019 - 2022 MY Avalon HV [04/2018 -        ]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): HOW TO PROCEED WITH TROUBLESHOOTING

  • Before replacing the hybrid vehicle control ECU, refer to Registration.

    Click here 2019 - 2020 MY Avalon HV [04/2018 - 08/2020]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): REGISTRATION 2021 - 2022 MY Avalon HV [08/2020 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): REGISTRATION

  • After the skid control ECU (brake booster with master cylinder assembly) is replaced, perform the yaw rate and acceleration sensor zero point calibration.

    Click here 2019 - 2021 MY Avalon HV [04/2018 - 08/2021]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model): CALIBRATION

PROCEDURE

1.

CHECK CAN COMMUNICATION SYSTEM

(a) Using the Techstream, check if the CAN communication system is functioning normally.

Click here 2019 - 2020 MY Avalon HV [04/2018 - 08/2020]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): DIAGNOSIS SYSTEM 2021 MY Avalon HV [08/2020 - 08/2021]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): DIAGNOSIS SYSTEM

Result

Proceed to

CAN communication system DTCs are not output

OK

CAN communication system DTCs are output

NG
NG

GO TO CAN COMMUNICATION SYSTEM

OK

2.

CHECK FOR DTCs

(a) Clear the DTCs.

Powertrain > Radar Cruise1 > 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 > Radar Cruise1 > Trouble Codes

Result

Proceed to

DTC P163081 is not output

A

DTC P163081 is output

B
A

USE SIMULATION METHOD TO CHECK

B

3.

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY

(a) Replace the brake booster with master cylinder assembly.

Click here 2019 - 2021 MY Avalon HV [04/2018 - 08/2021]; BRAKE SYSTEM (OTHER): BRAKE BOOSTER (for HV Model): REMOVAL

NEXT

4.

CHECK FOR DTCs

(a) Clear the DTCs.

Powertrain > Radar Cruise1 > 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 > Radar Cruise1 > Trouble Codes

Result

Proceed to

DTC P163081 is not output

A

DTC P163081 is output

B
A

END
B

REPLACE HYBRID VEHICLE CONTROL ECU