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                        | Last Modified: 08-21-2023 | 6.11:8.1.0 | Doc ID: RM100000001PY59 |  
                        | Model Year Start: 2021 | Model: Avalon HV | Prod Date Range: [08/2020 -                    
                                       ] |  
                        | Title: CELLULAR COMMUNICATION: SAFETY CONNECT SYSTEM: Emergency Call Switch Illumination Circuit; 2021 - 2022 MY Avalon Avalon HV [08/2020 -        ] |  
                     
                        
                           | Emergency Call Switch Illumination Circuit |  WIRING DIAGRAMw/ Sliding Roof  w/o Sliding Roof  CAUTION / NOTICE / HINT
                     NOTICE: 
                        
Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Safety Connect System.
Click here
                                 
                                    
                                       ![2021 MY Avalon Avalon HV [08/2020 - 08/2021]; CELLULAR COMMUNICATION: SAFETY CONNECT SYSTEM: PRECAUTION](/t3Portal/stylegraphics/info.gif)  ![2022 MY Avalon Avalon HV [08/2021 -        ]; CELLULAR COMMUNICATION: SAFETY CONNECT SYSTEM: PRECAUTION](/t3Portal/stylegraphics/info.gif) 
Inspect the fuses for circuits related to this system before performing the following procedure.
 PROCEDURE(a) Choose the model to be inspected. 
                     
                        
                           | Result | Proceed to |  
                           | w/ Sliding Roof | A |  
                           | w/o Sliding Roof | B |  
                     
                        | 
                              
                                 | A |  
                                 |   |  |  
                     
                        
                           | 2.  | CHECK HARNESS AND CONNECTOR (ROOF CONSOLE BOX SUB-ASSEMBLY (MANUAL (SOS) SWITCH) POWER SOURCE) |  (a) Disconnect the G124 DCM (telematics transceiver) connector. (b) Disconnect the O10 roof console box sub-assembly (manual (SOS) switch) connector. (c) Measure the voltage according to the value(s) in the table below. Standard Voltage:  
                     
                        
                        
                        
                     
                     
                        
                           | Tester Connection | Switch Condition | Specified Condition |  
                           | O10-13 (RRID) - Body Ground | Ignition switch ON | 11 to 14 V |  (d) Measure the resistance according to the value(s) in the table below. Standard Resistance:  
                     
                        
                        
                        
                     
                     
                        
                           | Tester Connection | Condition | Specified Condition |  
                           | G124-3 (SIG-) - O10-16 (GND3) | Always | Below 1 Ω |  
                           | G124-3 (SIG-) or O10-16 (GND3) - Body ground | Always | 10 kΩ or higher |  
                     
                        
                           | NG |   | REPAIR OR REPLACE HARNESS OR CONNECTOR |  
                     
                        | 
                              
                                 | OK |  
                                 |   |  |  
                     
                        
                           | 3.  | INSPECT ROOF CONSOLE BOX SUB-ASSEMBLY (MANUAL (SOS) SWITCH) |  
                     
                        
                           | (a) Remove the roof console box sub-assembly (manual (SOS) switch). Click here
                                    
                                       
                                          ![2019 - 2022 MY Avalon Avalon HV [04/2018 -        ]; LIGHTING (INT): PERSONAL LIGHT: REMOVAL](/t3Portal/stylegraphics/info.gif)  | 
                                 
                                    |   |  
                                    | 
                                          
                                             
                                             
                                          
                                          
                                             
                                                | *a | Component without harness connected (Roof Console Box Sub-assembly (Manual (SOS) Switch)) |  |  |  (b) Apply auxiliary battery voltage to the connector and check that the roof console box assembly comes on. OK:  
                     
                        
                        
                        
                     
                     
                        
                           | Measurement Condition | Condition | Specified Condition |  
                           | Auxiliary battery positive (+) → O10-13 (RRID) Auxiliary battery negative (-) → O10-16 (GND3) | Always | Manual (SOS) switch illumination illuminates |  
                     
                        
                           | 4.  | CHECK HARNESS AND CONNECTOR (ROOF CONSOLE BOX SUB-ASSEMBLY (MANUAL (SOS) SWITCH) POWER SOURCE) |  (a) Disconnect the G124 DCM (telematics transceiver) connector. (b) Disconnect the O9 roof console box sub-assembly (manual (SOS) switch) connector. (c) Measure the voltage according to the value(s) in the table below. Standard Voltage:  
                     
                        
                        
                        
                     
                     
                        
                           | Tester Connection | Switch Condition | Specified Condition |  
                           | O9-9 (RRID) - Body Ground | Ignition switch ON | 11 to 14 V |  (d) Measure the resistance according to the value(s) in the table below. Standard Resistance:  
                     
                        
                        
                        
                     
                     
                        
                           | Tester Connection | Condition | Specified Condition |  
                           | G124-3 (SIG-) - O9-12 (GND3) | Always | Below 1 Ω |  
                           | G124-3 (SIG-) or O9-12 (GND3) - Body ground | Always | 10 kΩ or higher |  
                     
                        
                           | NG |   | REPAIR OR REPLACE HARNESS OR CONNECTOR |  
                     
                        | 
                              
                                 | OK |  
                                 |   |  |  
                     
                        
                           | 5.  | INSPECT ROOF CONSOLE BOX SUB-ASSEMBLY (MANUAL (SOS) SWITCH) |  
                     
                        
                           | (a) Remove the roof console box sub-assembly (manual (SOS) switch). Click here
                                    
                                       
                                          ![2019 - 2022 MY Avalon Avalon HV [04/2018 -        ]; LIGHTING (INT): PERSONAL LIGHT: REMOVAL](/t3Portal/stylegraphics/info.gif)  | 
                                 
                                    |   |  
                                    | 
                                          
                                             
                                             
                                          
                                          
                                             
                                                | *a | Component without harness connected (Roof Console Box Sub-assembly (Manual (SOS) Switch)) |  |  |  (b) Apply auxiliary battery voltage to the connector and check that the roof console box assembly comes on. OK:  
                     
                        
                        
                        
                     
                     
                        
                           | Measurement Condition | Condition | Specified Condition |  
                           | Auxiliary battery positive (+) → O9-9 (RRID) Auxiliary battery negative (-) → O9-13 (GND3) | Always | Manual (SOS) switch illumination illuminates |  
                     
                        | 
                              
                                 | OK |  
                                 |   |  |  
                     
                        
                           | 6.  | REPLACE DCM (TELEMATICS TRANSCEIVER) |  (a) Replace the DCM (telematics transceiver) with a new one. Click here
                        
                           
                              ![2021 - 2022 MY Avalon Avalon HV [08/2020 -        ]; CELLULAR COMMUNICATION: DCM(TELEMATICS TRANSCEIVER): REMOVAL](/t3Portal/stylegraphics/info.gif)  
                     NOTICE: 
                        
The ignition switch must be off.
Do not exchange the DCM (telematics transceiver) with one from another vehicle.
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