Last Modified: 11-20-2023 6.11:8.1.0 Doc ID: RM100000001SH5S
Model Year Start: 2021 Model: Camry Prod Date Range: [10/2020 -           ]
Title: CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM: U040181; Invalid Data Received from ECM/PCM "A" Invalid Serial Data Received; 2021 - 2024 MY Camry [10/2020 -        ]

DTC

U040181

Invalid Data Received from ECM/PCM "A" Invalid Serial Data Received

DESCRIPTION

If the ECM cannot recognize the forward recognition camera. DTC U040181 is stored.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

U040181

Invalid Data Received from ECM/PCM "A" Invalid Serial Data Received

Approximately 17 seconds or more after the ignition switch is turned to ON, the ECM cannot recognize the forward recognition camera for approximately 2 seconds or more.

ECM

Radar Cruise2

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 DTC (Radar Cruise2)

(a) Clear the DTCs.

Powertrain > Radar Cruise2 > 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 Cruise2 > Trouble Codes

Result

Proceed to

DTC U040181 is not output

A

DTC U040181 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