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                        | Last Modified: 08-21-2023 | 6.11:8.1.0 | Doc ID: RM100000001AYB8 |  
                        | Model Year Start: 2019 | Model: Avalon | Prod Date Range: [04/2018 -                    
                                       ] |  
                        | Title: LIGHTING (EXT): LIGHTING SYSTEM (for Gasoline Model with Cornering Light): U0073,U0126,U0142,U0155,U0182; Control Module Communication Bus OFF; 2019 - 2022 MY Avalon [04/2018 -        ] |  
                     
                        
                           | DTC | U0073 | Control Module Communication Bus OFF |  
                     
                        
                           | DTC | U0126 | Lost Communication with Steering Angle Sensor Module |  
                     
                        
                           | DTC | U0142 | Lost Communication with Body Control Module "B" |  
                     
                        
                           | DTC | U0155 | Lost Communication with Instrument Panel Cluster (IPC) Control Module |  
                     
                        
                           | DTC | U0182 | Lost Communication With Lighting Control Module Front |  DESCRIPTIONThese DTCs are stored if a CAN communication malfunction occurs between the headlight ECU sub-assembly RH and other ECUs. 
                     
                        
                        
                        
                        
                        
                     
                     
                        
                           | DTC No. | Detection Item | DTC Detection Condition | Trouble Area | DTC Output from |  
                           | U0073 | Control Module Communication Bus OFF | The headlight ECU sub-assembly RH does not send/receive data. | CAN communication system | Headlight ECU sub-assembly RH |  
                           | U0126 | Lost Communication with Steering Angle Sensor Module | The headlight ECU sub-assembly RH does not receive data from the steering sensor for approximately 10 seconds or more. | 
                                 
                                    
CAN communication system
Steering sensor
 | Headlight ECU sub-assembly RH |  
                           | U0142 | Lost Communication with Body Control Module "B" | The headlight ECU sub-assembly RH does not receive data from the main body ECU (multiplex network body ECU) for approximately 10 seconds or more. | 
                                 
                                    
CAN communication system
Main body ECU (multiplex network body ECU)
 | Headlight ECU sub-assembly RH |  
                           | U0155 | Lost Communication with Instrument Panel Cluster (IPC) Control Module | The headlight ECU sub-assembly RH does not receive data from the combination meter assembly for approximately 30 seconds or more. | 
                                 
                                    
CAN communication system
Combination meter assembly
 | Headlight ECU sub-assembly RH |  
                           | U0182 | Lost Communication With Lighting Control Module Front | The headlight ECU sub-assembly RH does not receive data from the headlight ECU sub-assembly LH for approximately 10 seconds or more. | 
                                 
                                    
CAN communication system
Headlight ECU sub-assembly LH
 | Headlight ECU sub-assembly RH |  PROCEDURE(a) Connect the Techstream to the DLC3. (b) Turn the engine switch on (IG). (c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / HL AutoLeveling (Sub) / Trouble Codes. (e) Clear the DTCs. Body Electrical > HL AutoLeveling (Sub) > Clear DTCs
                     
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                                 | NEXT |  
                                 |   |  |  (a) Connect the Techstream to the DLC3. (b) Turn the engine switch on (IG). (c) Wait 35 seconds or more. (d) Turn the Techstream on. (e) Enter the following menus: Body Electrical / HL AutoLeveling (Sub) / Trouble Codes. (f) Check for DTCs. Body Electrical > HL AutoLeveling (Sub) > Trouble CodesOK:  DTCs are not output. |