Perform a comprehensive diagnostic scan of the Rivian EDV 500's electrical and electronic systems using manufacturer-specific diagnostic equipment to identify stored fault codes and system status.

Warnings

Tools required

Preparation

1. Position vehicle on level ground in a well-ventilated area
2. Apply parking brake and place transmission in Park
3. Place wheel chocks behind rear wheels
4. Verify 12V auxiliary battery voltage is above 12.4V; charge if necessary
5. Ensure vehicle key fob is inside the vehicle cabin
6. Close all doors, hood, and liftgate to prevent communication timeout errors
7. Obtain customer complaint information and any previously stored diagnostic trouble codes
8. Verify Rivian Service Toolbox software is updated to latest version

Procedure

1. 1

   Access diagnostic port and connect scanner
   Locate the OBD-II diagnostic port beneath the driver's side dashboard, above the pedal assembly. Connect the Rivian-approved diagnostic interface cable to the port. Ensure the connection is fully seated and secure.
2. 2

   Power on vehicle systems
   Press the brake pedal and press the power button to place the vehicle in Ready mode (do not start driving). Verify the instrument cluster fully illuminates and all systems initialize. Wait 30 seconds for all control modules to complete boot sequence.
3. 3

   Launch Rivian Service Toolbox software
   Open the Rivian Service Toolbox application on the diagnostic laptop. Select 'New Session' and enter the vehicle VIN when prompted. Allow the software to establish communication with the vehicle gateway module. Verify successful connection to all available control modules.
4. 4

   Perform module identification scan
   Navigate to 'Vehicle Scan' > 'Module Identification' in the RST software. Execute a full module scan to identify all installed control modules including Battery Management System, Drive Unit Controllers (front and rear), Gateway, Body Control Module, ADAS modules, and infotainment systems. Document any modules that fail to communicate.
5. 5

   Execute comprehensive fault code scan
   Select 'Read DTCs' from the main diagnostic menu. Choose 'All Modules' to perform a system-wide diagnostic trouble code scan. Allow 3-5 minutes for the scan to complete. The system will retrieve current codes, pending codes, and stored/historical codes from all modules.
6. 6

   Review and document fault codes
   Review all retrieved diagnostic trouble codes. Document each DTC with its description, status (current/pending/stored), occurrence count, and freeze frame data. Pay particular attention to codes from the Battery Management System (BMS), drive unit controllers, and charging system. Note any DTCs related to high-voltage isolation faults or battery cell imbalances.
7. 7

   Check high-voltage battery system status
   Navigate to 'Battery Management System' module. Review battery pack state of charge, state of health, cell voltage spread, module temperatures, and isolation resistance values. Document any values outside normal parameters. Check for any active battery protection modes or reduced power warnings.
8. 8

   Review drive unit parameters
   Access both front and rear Drive Unit Controller modules. Review motor temperatures, inverter temperatures, resolver status, and any active derating conditions. Check for proper motor position sensor calibration and verify no mechanical fault codes are present.
9. 9

   Scan ADAS and safety systems
   Navigate to Advanced Driver Assistance Systems modules including Forward Collision Warning, Adaptive Cruise Control, Lane Keep Assist, and camera systems. Verify calibration status for all cameras and radar sensors. Document any calibration required flags or sensor blockage warnings.
10. 10

    Check charging system status
    Access the onboard charger module and DC fast charge controller. Review charging event history, any interrupted charge sessions, and verify proper communication with charge port control module. Check for thermal management issues during charging cycles.
11. 11

    Review thermal management systems
    Access the thermal management controller. Review battery cooling system operation, motor cooling loop status, cabin HVAC integration, and coolant pump operation. Check for proper refrigerant pressures and heat pump operation in applicable temperature ranges.
12. 12

    Generate diagnostic report
    Use the RST software to generate a comprehensive diagnostic report including all scanned modules, fault codes, system parameters, and freeze frame data. Save the report with vehicle VIN and current date/time stamp. Export report to PDF format for documentation and customer communication.
13. 13

    Check for software updates
    Navigate to 'Software Update Check' in the RST menu. Query Rivian's update server for any available software updates, technical service bulletins, or recalls applicable to this vehicle's VIN and current software versions. Document any recommended updates.
14. 14

    Disconnect diagnostic equipment
    Exit the Rivian Service Toolbox software properly to close the diagnostic session. Power off the vehicle by pressing the power button. Disconnect the diagnostic cable from the OBD-II port. Store all diagnostic equipment properly.

Reassembly

1. Ensure OBD-II port cover is reinstalled if equipped
2. Remove wheel chocks
3. Verify all vehicle functions return to normal operation
4. Test drive vehicle if fault codes indicate drivability concerns

Verification

• Confirm all control modules communicated successfully during scan
• Verify diagnostic report includes all retrieved fault codes with freeze frame data
• Review that no new fault codes were generated during the diagnostic procedure
• Ensure vehicle returns to normal ready mode without warning lights (unless pre-existing conditions exist)
• Confirm 12V battery voltage remains stable after diagnostic session
• Verify all documented codes match customer complaint symptoms
• Check that diagnostic session data is properly saved for warranty or repair documentation

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