Complete reset and calibration of the high-voltage EV system, battery management system, motor controllers, and regenerative braking system for the Rivian EDV 500 commercial delivery van.

Warnings

Tools required

Parts

• HV interlock connector seal (if damaged) × 1 — Use OEM specification

Preparation

1. Park vehicle on level surface and apply parking brake firmly
2. Place wheel chocks at all four wheels
3. Verify battery state of charge is above 30% using instrument cluster display
4. Ensure ambient temperature is between 50°F and 90°F for optimal calibration
5. Download latest Rivian EDV 500 calibration software package to laptop
6. Disable any aftermarket fleet tracking or telematics devices that interface with CAN bus
7. Document all active fault codes before beginning procedure
8. Verify 12V auxiliary battery voltage is above 12.4V

Procedure

1. 1

   Establish diagnostic connection and perform pre-calibration health check
   Connect Rivian Service Diagnostics Tool to OBD-II port located under driver side dash. Launch RSDT software and select 'EDV 500' from vehicle menu. Navigate to 'System Health Check' and run complete diagnostic scan. Verify all high-voltage system components report 'Ready' status. Document any warnings or pre-existing fault codes. Check that BMS reports all cell groups within 0.020V of each other.
2. 2

   Enter service mode and prepare HV system
   In RSDT, navigate to 'Service Mode' menu and select 'EV System Reset/Calibration'. Enter technician credentials when prompted. System will automatically place vehicle in service mode, disabling HVIL (High Voltage Interlock Loop) while keeping contactors closed for diagnostics. Confirm 'Service Mode Active' message appears on both RSDT and instrument cluster. Verify traction control, ABS, and regenerative braking systems show 'Inactive - Service Mode' status.
3. 3

   Isolate high-voltage system
   Don Class 0 insulated gloves. Open front hood and locate HV service disconnect under front access panel (orange-labeled cover). Remove plastic cover by rotating quarter-turn fasteners counterclockwise. Pull HV service disconnect handle firmly upward until it locks in vertical position. Wait exactly 5 minutes for high-voltage capacitors to discharge. Use CAT III multimeter to verify 0V DC at HV junction box test points before proceeding.
4. 4

   Clear all adaptive memory and fault codes
   Return to RSDT and select 'Clear Adaptive Memory' from calibration menu. This will erase learned driving patterns, regenerative braking calibration, torque vectoring maps, and battery thermal management history. Confirm action when prompted. Next, select 'Clear All Fault Codes' and confirm. System will clear codes from BMS, motor controllers, thermal management system, and vehicle control unit. Verify all modules show zero active or pending codes.
5. 5

   Reinstall HV service disconnect and verify system integrity
   Push HV service disconnect handle down firmly until it clicks and locks in horizontal position. Ensure interlock connector is fully seated with no gap visible. Reinstall orange protective cover and rotate fasteners clockwise. In RSDT, select 'HV System Integrity Check'. Software will verify HVIL continuity, insulation resistance above 500 ohms/volt, and proper contactor operation. All checks must pass before proceeding.
6. 6

   Initialize battery management system calibration
   In RSDT, navigate to 'BMS Calibration' and select 'Initialize New Calibration'. System will load fresh calibration tables for current battery chemistry and firmware version. Process takes approximately 8-10 minutes. Monitor progress bar and do not interrupt. Software will perform cell balancing algorithm verification, SOC calculation reset, and thermal sensor validation. Confirm 'BMS Calibration Complete' message before continuing.
7. 7

   Calibrate front motor controller
   Select 'Front Motor Controller' from calibration menu. Choose 'Full Calibration' option. System will command motor through precise rotation sequence while monitoring resolver position, phase current balance, and back-EMF characteristics. Process takes approximately 12-15 minutes. Motor may produce audible humming and slight rotation during procedure - this is normal. Verify 'Front Motor Calibration: PASS' status and review calibration quality metrics showing values within 2% of nominal.
8. 8

   Calibrate rear motor controller
   Select 'Rear Motor Controller' from calibration menu and choose 'Full Calibration'. Repeat same calibration sequence as front motor. System will establish baseline torque curves, resolver alignment, and thermal derating parameters. Monitor for any fault codes during 12-15 minute process. Verify 'Rear Motor Calibration: PASS' status. Compare front and rear motor calibration quality metrics - values should be within 5% of each other.
9. 9

   Perform torque vectoring system calibration
   Navigate to 'Torque Vectoring' calibration section. Select 'Dual Motor Calibration' to synchronize front and rear motor controllers. System will establish baseline torque split algorithms, wheel speed sensor correlation, and dynamic stability control parameters. Process takes 5-7 minutes. Software will simulate various load scenarios and verify proper torque distribution response. Confirm all tests show 'PASS' status.
10. 10

    Calibrate regenerative braking system
    Select 'Regenerative Braking Calibration' from menu. System will integrate motor controller data with brake pedal position sensors, hydraulic pressure sensors, and ABS module. Software establishes blending maps between regenerative and friction braking. Process takes 8-10 minutes and includes verification of maximum regenerative current limits based on battery temperature and SOC. Verify calibration completes with no warnings and brake blend factor shows nominal values.
11. 11

    Calibrate thermal management system
    Navigate to 'Thermal Management' and select 'Full System Calibration'. Software will calibrate battery cooling system, motor cooling loops, and cabin HVAC integration. System verifies coolant flow sensors, temperature sensor accuracy across all zones, and heat pump operation. Process takes 6-8 minutes. Confirm all temperature sensors read within 2°C of each other at ambient and cooling pump operates smoothly during test sequence.
12. 12

    Perform vehicle dynamics sensor calibration
    Select 'Vehicle Dynamics' calibration. System will calibrate yaw rate sensor, lateral acceleration sensors, steering angle sensor, and ride height sensors (if equipped). Ensure vehicle is on level surface as software establishes zero-point references. Process takes 3-4 minutes. All sensors must calibrate successfully for stability control and torque vectoring to function properly. Verify 'All Sensors Calibrated' confirmation.
13. 13

    Complete system integration and exit service mode
    Select 'Finalize Calibration' from main menu. RSDT will perform complete system integration check, verify all modules communicate properly on CAN bus, and load final calibration tables to vehicle ECUs. Process takes 5-7 minutes. System will automatically exit service mode when complete. Verify 'Calibration Successful - Service Mode Disabled' message appears. Review final system status showing all modules 'Ready' with no fault codes.
14. 14

    Perform post-calibration verification drive cycle
    With technician in vehicle and RSDT connected in monitor mode, perform controlled test drive. Drive 2-3 miles including: gentle acceleration and regenerative braking, moderate acceleration to 40 mph, figure-eight maneuver in parking lot, and full-stop hydraulic braking from 30 mph. Monitor RSDT for any fault codes or calibration warnings. Verify smooth torque delivery, proper regen operation, and stable torque vectoring during turns. Return to service bay.
15. 15

    Generate calibration report and update vehicle records
    In RSDT, navigate to 'Calibration Report' and generate complete documentation including before/after comparison, all calibration values, pass/fail status of each subsystem, and any notes. Save report with VIN and date stamp. Update vehicle service records with calibration completion, software versions installed, and any components requiring future monitoring. Print or export calibration certificate for customer records.

Reassembly

1. Ensure HV service disconnect is fully seated and locked in operating position
2. Verify all orange protective covers are reinstalled over HV components
3. Confirm front hood is properly closed and latched
4. Remove wheel chocks and verify parking brake releases properly

Verification

• Test drive vehicle for minimum 5 miles in varied conditions to begin adaptive relearning
• Verify regenerative braking engages smoothly when releasing accelerator pedal
• Confirm no warning lights illuminated on instrument cluster
• Check that power delivery is smooth and linear with no hesitation or surging
• Verify estimated range calculation appears reasonable for current state of charge
• Confirm ABS and traction control systems function normally during brake testing
• Use RSDT to verify zero active fault codes across all EV system modules
• Verify torque vectoring operates correctly during low-speed turning maneuvers
• Check that battery thermal management system activates appropriately based on conditions
• Advise customer that full adaptive learning requires 50-100 miles of normal driving

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