Last Modified: 11-20-2023 6.11:8.1.0 Doc ID: RM100000001SH5J
Model Year Start: 2021 Model: Camry Prod Date Range: [10/2020 -           ]
Title: CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM: P163181; Communication Error from ECM to VSC Invalid Serial Data Received; 2021 - 2024 MY Camry [10/2020 -        ]

DTC

P163181

Communication Error from ECM to VSC Invalid Serial Data Received

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.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

P163181

Communication Error from ECM to VSC Invalid Serial Data Received

When the ignition switch is ON and the dynamic radar cruise control system is operating, the ECM detects logic error signals sent from the skid control ECU (brake actuator assembly) for approximately 1 second or more.

  • Vehicle stability control system
  • ECM

Cruise Control

CAUTION / NOTICE / HINT

NOTICE:

Before replacing the ECM, refer to Registration.

w/ Smart Key System: Click here 2020 - 2022 MY Camry [09/2019 - 08/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): REGISTRATION 2023 - 2024 MY Camry [08/2022 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): REGISTRATION

w/o Smart Key System: Click here 2020 - 2024 MY Camry [09/2019 -        ]; THEFT DETERRENT / KEYLESS ENTRY: IMMOBILISER SYSTEM (w/o Smart Key System): REGISTRATION

PROCEDURE

1.

CHECK FOR DTCs (VEHICLE STABILITY CONTROL SYSTEM)

(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

B

GO TO VEHICLE STABILITY CONTROL SYSTEM

w/ Electric Parking Brake System: Click here 2021 - 2024 MY Camry [10/2020 -        ]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM (w/ Electric Parking Brake System): HOW TO PROCEED WITH TROUBLESHOOTING

w/o Electric Parking Brake System: Click here 2021 - 2024 MY Camry [10/2020 -        ]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM (w/o Electric Parking Brake System): HOW TO PROCEED WITH TROUBLESHOOTING

A

2.

CHECK FOR DTCs (Radar Cruise1)

(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 P163181 is not output

A

DTC P163181 is output

B

A

USE SIMULATION METHOD TO CHECK 2021 MY Camry [10/2020 - 08/2021]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING 2022 - 2024 MY Camry [08/2021 -        ]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING

B

REPLACE ECM

for A25A-FKS: Click here 2021 - 2022 MY Camry [10/2020 - 08/2022]; A25A-FKS (ENGINE CONTROL): ECM: REMOVAL 2023 - 2024 MY Camry [08/2022 -        ]; A25A-FKS (ENGINE CONTROL): ECM: REMOVAL

for 2GR-FKS: Click here 2021 - 2022 MY Camry [10/2020 - 08/2022]; 2GR-FKS (ENGINE CONTROL): ECM: REMOVAL 2023 - 2024 MY Camry [08/2022 -        ]; 2GR-FKS (ENGINE CONTROL): ECM: REMOVAL