Complete EV system reset and calibration procedure for the Rivian EDV 500, including battery management system reset, motor controller calibration, and sensor relearning procedures.

Warnings

Tools required

Parts

• High-voltage interlock connector seal × 1 — Use OEM specification

Preparation

1. Park vehicle on level ground in well-ventilated area with climate control between 60-80°F
2. Verify battery state of charge is between 30-80% using instrument cluster
3. Place wheel chocks at all four wheels and ensure parking brake is engaged
4. Disconnect 12V auxiliary battery negative terminal and wait 5 minutes
5. Don insulated high-voltage safety gloves rated for minimum 1000V
6. Verify Rivian diagnostic software is updated to latest version on laptop
7. Have vehicle VIN, current software version, and any fault codes documented before starting

Procedure

1. 1

   Access High-Voltage Service Disconnect
   Open rear cargo area and locate high-voltage service disconnect panel behind driver-side panel. Remove panel cover by releasing four quarter-turn fasteners. Inspect service disconnect for damage or corrosion before proceeding.
2. 2

   Disable High-Voltage System
   While wearing high-voltage gloves, pull service disconnect lever to OFF position. Remove high-voltage interlock connector by pressing release tab and pulling straight out. Store connector in secure location away from vehicle. Wait minimum 5 minutes for capacitor discharge before proceeding.
3. 3

   Verify High-Voltage System De-energization
   Using digital multimeter set to DC voltage, verify voltage at high-voltage service disconnect terminals reads less than 5V DC. Test between positive and negative terminals, then each terminal to chassis ground. Do not proceed if any voltage above 5V is detected.
4. 4

   Connect Diagnostic Equipment
   Reconnect 12V auxiliary battery negative terminal. Connect Rivian diagnostic tool to OBD-II port located under driver-side dashboard. Launch Rivian service software on laptop and establish connection with vehicle. Verify communication with all control modules: Battery Management System (BMS), Motor Control Units (front and rear), Gateway Module, and ADAS modules.
5. 5

   Retrieve and Document Fault Codes
   Using diagnostic software, perform full system scan and retrieve all stored and pending fault codes. Document all codes with freeze frame data. Save diagnostic report for reference. Take screenshots of BMS data including cell voltages, temperatures, and state of health readings before clearing codes.
6. 6

   Clear Fault Codes and Adaptation Values
   In diagnostic software, navigate to Service Functions menu. Select 'Clear All Fault Codes' and confirm. Then navigate to 'Reset Adaptation Values' for BMS, front motor controller, and rear motor controller. Confirm each reset operation. Wait for software confirmation that all adaptation values have been cleared.
7. 7

   Perform Battery Management System Reset
   In diagnostic software, select Battery Management System module. Navigate to Special Functions and select 'BMS Cell Balancing Reset'. Allow procedure to complete (approximately 10 minutes). Then select 'State of Charge Recalibration' and follow on-screen prompts. System will analyze individual cell voltages and recalculate pack capacity.
8. 8

   Calibrate Motor Controllers
   Navigate to Motor Control Unit (Front) in diagnostic software. Select 'Encoder Position Learn' and follow prompts to initiate front motor encoder calibration. Repeat process for Motor Control Unit (Rear). Each calibration takes approximately 3-5 minutes. Monitor for any error messages during calibration process.
9. 9

   Reset Torque Vectoring and Traction Control Systems
   Access Vehicle Dynamics Control module in diagnostic software. Select 'Reset Torque Vectoring Calibration' followed by 'Reset Traction Control Baseline'. System will perform internal calculations based on current vehicle configuration and tire specifications. Wait for confirmation messages before proceeding.
10. 10

    Re-enable High-Voltage System
    Disconnect diagnostic tool temporarily. Don high-voltage gloves and inspect high-voltage interlock connector for damage. Replace seal if worn. Reinstall interlock connector into service disconnect until it clicks into place. Push service disconnect lever to ON position. Close and secure service disconnect panel cover.
11. 11

    Perform Drive Motor Initialization
    Reconnect diagnostic tool. In service software, navigate to 'Drive System Initialization' function. Select 'Full System Initialization' which will power up high-voltage system under controlled conditions and perform motor self-tests. Monitor diagnostic data for proper voltage levels (390-410V nominal), motor temperatures, and inverter status. Process takes approximately 8-10 minutes.
12. 12

    Calibrate Regenerative Braking System
    Access Brake Control Module in diagnostic software. Select 'Regenerative Braking Calibration' and follow prompts. System will test regenerative braking integration with hydraulic brakes. Verify brake pedal feel sensor calibration is included in this process. Monitor for any fault codes related to brake system integration.
13. 13

    Perform Sensor Relearn Procedures
    Navigate to ADAS module and initiate 'Sensor Relearn Sequence'. This includes steering angle sensor reset (ensure wheels are straight), yaw rate sensor calibration, and acceleration sensor baseline. Follow on-screen instructions for each sensor. Some sensors may require vehicle to be driven in specific pattern - document these requirements for verification phase.
14. 14

    Update Software and Configuration
    Check for any available software updates in diagnostic tool. If updates are available and appropriate for current service, follow Rivian update procedures to flash latest software versions. After updates, verify vehicle configuration matches build specification. Confirm all option codes and features are properly enabled.
15. 15

    Final System Verification
    Perform final diagnostic scan to verify no fault codes are present. Review live data streams for BMS (all cell voltages within 0.02V of each other), motor controllers (both showing ready status), and vehicle dynamics systems (all sensors reading plausible values). Generate final diagnostic report and save for vehicle records. Clear ignition cycle counters if required.

Reassembly

1. Verify all high-voltage service panels are properly secured and sealed
2. Confirm high-voltage interlock connector is fully seated and locked
3. Remove wheel chocks and verify parking brake releases properly
4. Ensure all diagnostic equipment is disconnected before test drive

Verification

• Power on vehicle and verify instrument cluster displays no warning lights related to propulsion, battery, or traction systems
• Check that battery state of charge displays correctly and matches previous reading
• Verify regenerative braking functions smoothly when lifting throttle at low speed in parking lot
• Perform low-speed test drive (under 25 mph) in safe area to verify both motors engage, torque vectoring operates smoothly through turns, and no unusual vibrations or noises occur
• Verify steering angle sensor calibration by driving straight and confirming steering wheel icon on cluster is centered
• Test acceleration from stop to verify smooth power delivery with no hesitation or fault codes
• Perform final diagnostic scan after test drive to confirm no new fault codes have been generated
• Verify ADAS features (lane keeping, adaptive cruise) initialize properly if equipped
• Confirm vehicle enters READY mode within normal timeframe (2-3 seconds) after pressing start button

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