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                        | Last Modified: 08-21-2023 | 6.11:8.1.0 | Doc ID: RM100000001BE3O |  
                        | Model Year Start: 2019 | Model: Avalon HV | Prod Date Range: [04/2018 - 08/2021] |  
                        | Title: CRUISE CONTROL: LANE DEPARTURE ALERT SYSTEM (w/ Steering Control) (for HV Model): C1A01; Driving Support ECU; 2019 - 2021 MY Avalon HV [04/2018 - 08/2021] |  
                     
                        
                           | DTC | C1A01 | Driving Support ECU |  DESCRIPTIONIf the forward recognition camera detects a malfunction in the internal circuit of the driving support ECU assembly, DTC C1A01 is stored. 
                     
                        
                        
                        
                        
                     
                     
                        
                           | DTC No. | Detection Item | DTC Detection Condition | Trouble Area |  
                           | C1A01 | Driving Support ECU | 2 seconds after the power switch is turned on (IG), a malfunction in the driving support ECU assembly internal circuit is detected for 5 seconds or more. | Driving support ECU assembly |  CAUTION / NOTICE / HINT
                     NOTICE: 
                        
When replacing the driving support ECU assembly, always replace it with a new one. If a driving support ECU assembly which was installed to another vehicle is used, the information stored in the driving support ECU assembly will not match the information from the vehicle. As a result, a DTC may be stored.
The lane departure alert system (w/ steering control) uses the CAN communication system. First, confirm that there are no malfunctions in the CAN communication system. Refer to How to Proceed with Troubleshooting.
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                                       ![2019 - 2022 MY Avalon HV [04/2018 -        ]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): HOW TO PROCEED WITH TROUBLESHOOTING](/t3Portal/stylegraphics/info.gif)  PROCEDURE
                     
                        
                           | 1.  | REPLACE DRIVING SUPPORT ECU ASSEMBLY |  (a) Replace the driving support ECU assembly. Click here
                        
                           
                              ![2019 - 2021 MY Avalon Avalon HV [04/2018 - 08/2021]; CRUISE CONTROL: DRIVING SUPPORT ECU: REMOVAL](/t3Portal/stylegraphics/info.gif)  
                     
                        
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