Noise Diagnosis

Systematic diagnosis of noise concerns in a 2023 Rivian EDV 500 electric delivery van, including identification of source, isolation of drive unit noises, mechanical component inspection, and verification procedures.

Warnings

Tools required

Parts

• Shop towels × 1 — Use as needed

Preparation

1. Connect Rivian diagnostic scanner and check for any stored DTCs related to drive units, wheel bearings, or suspension components
2. Verify customer concern by test driving vehicle under conditions that replicate the noise
3. Record noise characteristics: frequency, pitch, duration, and correlation with speed or load
4. Park vehicle on level surface and apply parking brake
5. Place wheel chocks behind rear wheels
6. Allow drive units to cool to ambient temperature for accurate diagnosis

Procedure

1. 1

   Initial Visual Inspection
   Perform walkaround inspection of vehicle exterior. Check for obvious sources of noise including loose body panels, damaged underbody shields, debris caught in wheels or suspension, damaged CV boots, and any contact marks between moving and stationary components. Inspect cargo area for loose items that may create noise during driving.
2. 2

   Stationary Noise Test
   With vehicle in Park on level ground, activate the drive system. Listen for any whining, humming, or clicking noises from front and rear drive units while stationary. Note that electric motors produce characteristic high-frequency whine that is normal. Use electronic stethoscope to isolate specific drive unit if abnormal noise is present.
3. 3

   Lift Vehicle and Inspect Underbody
   Raise vehicle on lift to full height. Inspect all underbody components including drive units, CV axles, suspension components, exhaust heat shields, battery pack protective shields, and chassis bracing. Look for loose fasteners, damaged mounts, fluid leaks from differentials or drive units, and any signs of contact or rubbing.
4. 4

   Wheel Bearing and Tire Inspection
   With vehicle raised, grasp each wheel at 12 and 6 o'clock positions and check for play indicating worn wheel bearing. Rotate each wheel by hand and listen for grinding or roughness. Inspect tires for uneven wear patterns, embedded objects, or separation that could cause road noise. Check tire pressures against door placard specification.
5. 5

   Suspension Component Check
   Inspect all suspension bushings, ball joints, tie rod ends, and control arm connections for wear or play. Use pry bar to check for movement in ball joints and tie rod ends. Examine shock absorbers and struts for leaks or damage. Check sway bar end links and bushings for wear. Any loose suspension components can create clunking or rattling noises.
6. 6

   Drive Unit and Differential Inspection
   Visually inspect front and rear drive units for any signs of fluid leakage at seals or mounting points. Check drive unit mounting bolts for tightness (do not loosen if secure). Inspect CV axle boots for tears or damage. Check differential fill level through inspection port if accessible and noise suggests internal gear issue.
7. 7

   Driveline Component Testing
   With vehicle still raised and safely supported, rotate each wheel individually to check for binding or noise in CV joints and wheel bearings. Turn wheel through full steering range while rotating to identify CV joint clicking. Check for lateral play in CV axles by attempting to move axle shaft in and out at wheel hub.
8. 8

   Brake System Noise Check
   Inspect brake pads for uneven wear, contamination, or separation from backing plate. Check for worn brake pad indicators making contact with rotor. Examine rotors for excessive scoring, warping, or rust buildup. Verify brake caliper slides move freely and mounting hardware is secure. Regenerative braking system may produce slight whirring that is normal.
9. 9

   Electronic Stethoscope Pinpoint Test
   Lower vehicle and perform road test with chassis ears or electronic stethoscope sensors placed at suspected noise locations (wheel wells, drive unit areas, suspension mounting points, body panels). Monitor each channel during conditions that reproduce the noise to precisely locate the source.
10. 10

    Drive Unit Isolation Test
    If noise is isolated to drive unit area, access Rivian diagnostic system and review drive unit temperatures, torque outputs, and error logs. Compare noise frequency to motor RPM to determine if it is speed-related. Note that high-pitched whine that varies with motor speed is characteristic of electric motors but should be smooth and consistent, not pulsating or grinding.
11. 11

    Body and Interior Noise Check
    If mechanical sources are ruled out, inspect interior for rattles from cargo area, seats, door panels, headliner, and dashboard components. Check door seals and window weatherstripping for wind noise. Verify all body panel fasteners and clips are secure. Test HVAC system operation to rule out blower motor or vent noise.
12. 12

    Document Findings and Root Cause
    Record all findings in diagnostic scanner and service records. Document exact location and nature of noise, operating conditions required to reproduce, and whether noise is normal operational characteristic or requires repair. Photograph any damaged or worn components. Prepare repair recommendation with specific component identification.

Reassembly

1. Lower vehicle from lift if raised
2. Clear all diagnostic codes if testing generated any temporary faults
3. Ensure all inspection ports or access panels are properly secured

Verification

• Perform test drive under same conditions that originally produced the noise to verify diagnosis
• If noise source was identified and repair recommended, confirm noise is still present before repair to validate diagnosis
• Review all diagnostic data logs for any new codes or system errors generated during testing
• Document baseline noise levels if using decibel meter for future comparison after repair

Related trouble codes on this vehicle

Codes that commonly send this job to the bay — tap one for symptoms, causes, and diagnostic steps.

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