Comprehensive service to optimize battery range and efficiency through tire pressure adjustment, software updates, fluid level verification, and system diagnostics.

Warnings

Tools required

Parts

• Cabin air filter × 1 — Use OEM specification

Preparation

1. Park vehicle on level surface and apply parking brake
2. Ensure vehicle has been stationary for at least 2 hours for accurate tire pressure readings
3. Connect Rivian diagnostic software and verify communication with all vehicle modules
4. Record current odometer reading and battery state of charge
5. Verify customer concerns regarding range performance

Procedure

1. 1

   Check and adjust tire pressures
   Measure tire pressure on all four tires when cold. For EDV 500, set front tires to 55 PSI and rear tires to 58 PSI (cold pressure for maximum range). Under-inflation is the most common cause of reduced range. Record pressures before adjustment.
2. 2

   Inspect tire condition and alignment indicators
   Visually inspect all tires for uneven wear patterns indicating misalignment. Check tread depth across all tires - minimum 4/32 inch recommended for optimal efficiency. Uneven wear or low tread increases rolling resistance and reduces range. Note any concerns for alignment service recommendation.
3. 3

   Replace cabin air filter
   Remove cabin air filter access panel behind glove box. Inspect existing filter for contamination. A restricted cabin air filter forces HVAC system to work harder, consuming more energy. Install new OEM cabin air filter ensuring proper orientation with airflow arrows pointing toward vehicle interior.
4. 4

   Verify all fluid levels
   Check EV transmission fluid level through inspection port - should be at FULL mark when cold. Verify EV battery/motor coolant level in expansion tank (do not open when hot). Check brake fluid level - should be between MIN and MAX marks. Low coolant affects thermal management efficiency, directly impacting range.
5. 5

   Inspect brake system for drag
   Rotate each wheel by hand in neutral with vehicle on level ground. All wheels should rotate freely with minimal resistance. Use infrared thermometer to check brake rotor temperatures after 10-minute drive - all four corners should be within 20°F of each other. Dragging brakes significantly reduce range.
6. 6

   Perform battery thermal system verification
   Using diagnostic software, monitor battery pack temperatures across all modules. Temperature variance should be less than 5°C between modules. Check battery cooling system operation by commanding coolant pump activation. Verify no error codes related to thermal management system.
7. 7

   Check high voltage battery state of health
   Access battery diagnostics through service software. Review battery state of health (SOH) percentage - should be above 95% for 2023 model. Check cell voltage variance - maximum spread should not exceed 20mV. Document current battery capacity compared to as-built specification.
8. 8

   Update vehicle software
   Check for available software updates through Rivian diagnostic system. Install any powertrain, battery management, or efficiency-related updates. Software updates often include range optimization algorithms and regenerative braking improvements. Allow 30-45 minutes for complete update cycle if updates available.
9. 9

   Verify regenerative braking calibration
   Test regenerative braking function in both Standard and Max modes. Verify smooth engagement without harshness. Check diagnostic software for regen system efficiency metrics - should show 60-70% energy recovery under normal braking. Recalibrate if efficiency is below specification using service software.
10. 10

    Inspect underbody for damage or debris
    Raise vehicle on lift and inspect underbody aerodynamic panels for damage, missing fasteners, or accumulated debris. Check battery pack shield for impacts or deformation. Damaged aerodynamic components increase drag and reduce efficiency. Verify all undertray panels are secure.
11. 11

    Reset energy consumption statistics
    Using vehicle infotainment system, navigate to Energy > Trip Stats. Reset trip meter and efficiency calculations to establish new baseline after service. Clear any learned driver behavior parameters through diagnostic software to allow fresh adaptive learning.
12. 12

    Perform range test calculation
    With battery at known state of charge, use diagnostic software to run range estimation algorithm. Compare calculated range to EPA estimates (250 miles for EDV 500). Variance of more than 15% indicates potential battery degradation or system fault requiring further diagnosis.

Reassembly

1. Ensure all access panels and covers are properly reinstalled
2. Verify cabin air filter door is securely latched
3. Remove vehicle from service mode through diagnostic software
4. Clear service mode indicators and reset any triggered warnings

Verification

• Confirm tire pressures are set to specification and TPMS shows no warnings
• Verify all diagnostic software tests show PASS status with no active fault codes
• Test drive vehicle for 5-10 miles to verify normal regenerative braking operation and power delivery
• Confirm range estimate displayed on instrument cluster is appropriate for current battery charge level
• Provide customer with printed range optimization report showing before/after metrics and recommendations

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