Perform a comprehensive diagnostic scan of the vehicle's electrical and electronic systems using a Rivian-compatible diagnostic scanner to identify fault codes and system status.

Warnings

Tools required

Preparation

1. Ensure vehicle is parked on level ground in a well-ventilated area
2. Verify 12V battery voltage is above 12.4V - charge if necessary to prevent communication errors
3. Confirm vehicle is in Park mode with parking brake applied
4. Close all doors, hood, and liftgate to prevent body control module communication issues
5. Ensure diagnostic scan tool software is updated to latest version compatible with 2022 Rivian EDV 500
6. Have vehicle VIN readily available for software authentication

Procedure

1. 1

   Locate Diagnostic Port
   Locate the OBD-II diagnostic port under the driver's side dashboard area, typically positioned to the left of the steering column. Inspect port for damage, corrosion, or debris that could prevent proper connection.
2. 2

   Connect Diagnostic Equipment
   Connect the diagnostic scan tool interface to the OBD-II port. Ensure connection is secure and pins are fully seated. If using wireless adapter, verify Bluetooth or WiFi connection to laptop/tablet is established before proceeding.
3. 3

   Power On Vehicle Systems
   Without pressing brake pedal, press the power button once to place vehicle in Accessory mode. Wait 30 seconds for all control modules to initialize and establish communication on the vehicle network. Do not attempt to drive the vehicle during diagnostic procedures.
4. 4

   Initialize Diagnostic Software
   Launch Rivian diagnostic software on laptop or tablet. Select 'New Vehicle Session' and enter the VIN when prompted. Allow software to automatically detect and enumerate all vehicle control modules. This may take 2-3 minutes for initial connection on the Rivian EDV platform.
5. 5

   Perform Global System Scan
   Execute a comprehensive scan of all vehicle systems including: Battery Management System (BMS), Drive Unit Control Modules (front and rear), Body Control Module (BCM), Instrument Cluster, ADAS systems, HVAC, charging system, and auxiliary systems. Document the number of control modules detected - should be approximately 30-40 modules for EDV 500.
6. 6

   Retrieve and Document Fault Codes
   Review all Diagnostic Trouble Codes (DTCs) identified during scan. Document each code with: module name, DTC number, fault description, status (current/pending/historical), occurrence count, and freeze frame data. Pay special attention to high voltage system codes, motor controller codes, and battery thermal management codes.
7. 7

   Review Freeze Frame Data
   For each current or pending fault code, capture freeze frame data showing vehicle operating conditions when fault occurred. Record parameters including: battery state of charge, motor temperatures, vehicle speed, torque demand, battery voltage, and coolant temperatures at time of fault.
8. 8

   Check High Voltage System Status
   Navigate to Battery Management System module and review: individual cell voltages (should be within 0.020V of each other), battery pack temperature distribution, insulation resistance values (should exceed 100 ohms per volt), high voltage interlock status, and contactor operation history. Document any anomalies.
9. 9

   Verify Drive Unit Performance Data
   Review front and rear motor control module data including: motor winding temperatures, inverter temperatures, resolver/encoder status, motor hours, peak torque events, and thermal limiting events. Compare front and rear motor parameters for significant differences that may indicate issues.
10. 10

    Inspect Charging System Data
    Review onboard charger module for: charge cycle history, DC fast charge events, charging fault history, inlet temperature sensor status, and communication with charge port control module. Verify thermal management system operated correctly during recent charge events.
11. 11

    Test Critical Systems Communication
    Perform active tests of critical systems if supported: verify steering angle sensor calibration, test brake pedal position sensors, check accelerator pedal position correlation, and verify gear selector communication. Document any communication faults or sensor range issues.
12. 12

    Generate Diagnostic Report
    Use diagnostic software to generate comprehensive report including: all fault codes with descriptions, system health status summary, component operating parameters, battery health metrics, and recommended service actions. Save report with timestamp and current vehicle mileage for service records.
13. 13

    Clear Codes if Appropriate
    Only after documenting all fault codes and confirming repairs are completed, clear DTCs using diagnostic software. Perform a second global scan to verify all codes have cleared and no new codes have set immediately after clearing.
14. 14

    Disconnect Diagnostic Equipment
    Exit diagnostic software properly to end communication session. Power off vehicle by pressing power button. Disconnect diagnostic interface from OBD-II port and inspect port again for any damage caused during connection. Store diagnostic equipment properly.

Reassembly

1. No reassembly required for diagnostic scan procedure

Verification

• Verify diagnostic report was saved and contains all relevant fault codes and system data
• Confirm vehicle powers on normally and no new warning lights are illuminated on instrument cluster
• Test drive vehicle briefly to verify all systems operate normally after diagnostic procedures if codes were cleared
• Review any persistent or returned fault codes that may require further diagnosis or repair
• Document all findings in vehicle service history with date, mileage, and technician information

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