High Voltage Cable Inspection

Comprehensive inspection of all high voltage cables, connectors, and related components in the Rivian EDV 500's dual-motor electric drivetrain system to identify damage, wear, corrosion, or insulation degradation.

Warnings

Tools required

Parts

• High voltage cable connector seals × 1 — Use OEM specification
• Cable protective conduit segments × 1 — Use OEM specification as needed
• Cable tie bundle straps × 1 — OEM HV-rated cable ties
• HV connector protective caps × 1 — Use OEM specification

Preparation

1. Review Rivian EDV 500 high voltage safety procedures and emergency response protocols
2. Ensure all high voltage safety equipment is present, tested, and in good condition
3. Verify fire extinguisher rated for electrical fires (Class C) is immediately accessible
4. Ensure second person is present and aware of emergency shut-off procedures
5. Park vehicle on level, dry surface in well-ventilated area away from flammable materials
6. Set parking brake and chock all four wheels
7. Place high voltage safety mat under work area
8. Turn off vehicle and remove key fob to area at least 15 feet away
9. Open all doors and windows for ventilation
10. Disconnect 12V auxiliary battery negative terminal first, then positive terminal
11. Place lockout/tagout device on 12V battery
12. Access Rivian diagnostic tool and verify vehicle is in service mode
13. Don high voltage insulated gloves and verify they have no tears, punctures, or damage
14. Document initial vehicle condition and any visible damage with photos

Procedure

1. 1

   Disable High Voltage System
   Using Rivian diagnostic tool, initiate high voltage system shutdown sequence. Verify on scan tool that HV system shows 'Disconnected' or 'Service Mode Active'. Locate HV service disconnect (typically under rear cargo area or under vehicle). Using insulated gloves, remove service disconnect plug and install safety lock. Apply lockout/tagout tag. Wait minimum 10 minutes for capacitor discharge before proceeding. Use multimeter to verify 0V across main HV terminals.
2. 2

   Access Undercarriage HV Cables
   Raise vehicle on lift to comfortable working height. Ensure lift points are correct for EDV 500 (refer to lift point markings on chassis). Remove applicable underbody panels to access HV cable routing from battery pack to front and rear motor units. The EDV 500 has cables running along both sides of the chassis. Remove protective covers and cable management clips as needed. Document cable routing with photos for reassembly reference.
3. 3

   Inspect Battery Pack to Inverter Cables
   Visually inspect orange high voltage cables from battery pack forward to the power distribution unit and inverters. Check for: physical damage, cuts, abrasions, pinch points, heat discoloration or melting, cable routing deviation from original path, contact with sharp edges or moving parts, exposure to road debris or chemicals, and proper clearance from exhaust components (minimum 100mm). Use inspection mirror to view hidden areas. Check cable securing points and grommets for wear. Any cable showing insulation damage must be replaced immediately - do not continue inspection of that cable.
4. 4

   Inspect Front Motor HV Connections
   Locate front motor assembly and associated HV connections. Inspect the three-phase motor cables (typically three large orange cables) from inverter to motor housing. Check connector housings for: cracks, corrosion, moisture intrusion, proper seating and locking, seal integrity, and presence of all safety covers. Inspect cable strain relief and ensure no tension or pulling on connectors. Check for discoloration around terminals indicating overheating. Verify all high voltage warning labels are present and legible.
5. 5

   Inspect Rear Motor HV Connections
   Repeat inspection process for rear motor assembly. The EDV 500 rear motor typically handles higher loads during acceleration. Pay particular attention to cable jacket condition near bend radius points. Inspect busbars visible through connector inspection windows (if equipped) for corrosion or discoloration. Check mounting brackets and cable support clips for security. Ensure no cable movement or vibration evidence. Verify proper routing clearance from differential and drivetrain components.
6. 6

   Inspect HV Battery Pack External Connections
   Inspect all external HV connections on the battery pack assembly. Check main positive and negative terminals, manual service disconnect area, and any midpoint connections. Look for: terminal corrosion, loose hardware, damaged insulation boots, moisture or contamination, proper torque retention (visual check for rotation marks), and damage to surrounding pack housing. Inspect battery pack coolant connections (these are NOT high voltage but in proximity) for leaks that could compromise HV components.
7. 7

   Inspect HV Charging System Cables
   Locate charging inlet and HV cables connecting to battery management system. Inspect charge port door mechanism for damage that could allow water intrusion. Check charging cables for damage, especially near flex points. Inspect charge port connector pins for burning, pitting, or corrosion. Verify charge port lock mechanism operates correctly. Check inlet seals and gaskets for deterioration. Inspect DC fast charge and AC charge cable paths separately as they may route differently.
8. 8

   Perform Insulation Resistance Testing
   Using megohmmeter set to 500V DC test voltage, perform insulation resistance tests on all accessible HV cables. Test between HV positive and vehicle ground, HV negative and vehicle ground, and HV positive to HV negative (system isolated). Acceptable reading is typically >100 megohms minimum, but consult Rivian specifications. Record all readings. Any reading below 50 megohms indicates serious insulation degradation requiring cable replacement. Test each motor phase conductor to ground separately. Document all measurements.
9. 9

   Inspect Cable Shielding and Grounding
   The EDV 500 uses shielded HV cables to minimize EMI. Inspect shield continuity connections at each end of shielded cables. Check shield ground straps and bonds for corrosion, looseness, or damage. Verify shield drain wires are properly terminated. Check chassis ground points for corrosion - clean if necessary with wire brush and apply contact cleaner. Verify all bonding straps show less than 0.1 ohms resistance to chassis ground using multimeter.
10. 10

    Inspect HVIL (High Voltage Interlock Loop) System
    Trace the orange/white or orange/blue HVIL wiring that runs alongside HV cables. This low-voltage circuit monitors connector integrity. Check all HVIL connectors are fully seated. Inspect HVIL wiring for damage - any break disables the HV system. Verify HVIL continuity using multimeter (system must remain de-energized). Check HVIL monitoring points at each major HV connector. Use diagnostic tool to verify HVIL circuit status shows no faults.
11. 11

    Inspect Cable Support and Routing Hardware
    Examine all cable mounting brackets, P-clips, cable ties, and routing guides. Check for: loose mounting hardware, cracked brackets, worn rubber grommets, missing clips or ties, excessive cable movement or play, proper bend radius maintenance (typically minimum 10x cable diameter), clearance from moving parts and heat sources, and protection from road debris. Replace any damaged mounting hardware. Verify cables cannot contact suspension components through full range of motion.
12. 12

    Check for Technical Service Bulletins
    Using diagnostic tool or Rivian service portal, check for any open Technical Service Bulletins (TSBs) or Field Service Actions (FSAs) related to HV cables on 2025 EDV 500 vehicles. Verify VIN against any recall campaigns. Document any applicable TSBs. Check for software updates related to HV system monitoring or battery management that might affect cable inspection intervals or criteria.
13. 13

    Document and Photograph Findings
    Create comprehensive documentation of inspection results. Photograph any areas of concern including: wear patterns, discoloration, connector condition, cable routing, measurement readings, and overall system condition. Note exact location of any issues using Rivian's component location reference system. Record all insulation resistance values. Create written report noting pass/fail status for each inspection point. If any failures found, do NOT re-energize system.
14. 14

    Clean and Protect Connectors
    If all inspections pass, clean any accessible HV connector contact areas using electrical contact cleaner (non-residue type). Allow complete drying. Apply thin coat of Rivian-approved dielectric grease to connector seals and gaskets (not to contact surfaces unless specified by manufacturer). Verify all connector locks and secondary retainers are functioning. Replace any damaged connector seals or boots identified during inspection.
15. 15

    Re-energize and Test System
    Reinstall all cable covers and protective panels removed during inspection. Verify all fasteners are secured. Remove lockout/tagout devices. Reinstall HV service disconnect plug with insulated gloves - ensure positive click/lock engagement. Reconnect 12V auxiliary battery (positive first, then negative). Using diagnostic tool, clear any stored service mode codes. Energize HV system through diagnostic tool or by starting vehicle. Monitor for any HV isolation faults, HVIL faults, or warning lights. Perform HV system self-test through diagnostic tool. Verify no DTCs present. Test drive vehicle briefly and monitor for any unusual sounds, warnings, or performance issues. Re-check for DTCs after test drive.

Reassembly

1. Ensure all underbody panels are reinstalled with proper clips and fasteners
2. Verify all cable management hardware is secured and cables cannot move or chafe
3. Confirm all HV connector safety covers and insulation boots are properly installed
4. Double-check that HV service disconnect is fully engaged and locked
5. Verify all lockout/tagout devices have been removed
6. Confirm no tools or materials left in vehicle or under vehicle
7. Review all photos taken during disassembly to ensure proper reassembly

Verification

• Verify HV system energizes without faults or warning lights on dashboard
• Confirm diagnostic tool shows no HV system DTCs present
• Verify HVIL circuit shows 'OK' status with no open circuit faults
• Check that all HV isolation monitoring values are within specification (typically >100 megohms)
• Confirm both front and rear motors operate normally during test drive
• Verify regenerative braking functions properly in both directions
• Check that charging functions normally on both AC and DC (if equipment available)
• Confirm battery state of charge displays correctly and updates during driving
• Verify coolant temperature for battery and motors remains in normal range during operation
• Document final system status and file inspection report with vehicle service records
• If any abnormalities found during verification, immediately shut down HV system and re-inspect affected areas

Related trouble codes on this vehicle

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

Chasing one of these codes and not sure which part is guilty? Ask a master mechanic about YOUR car →

More procedures for this vehicle