Hardware Model Specification

Rivian R1S Diagnostics

Classification: Electric Vehicles Equipment

Hardware operational fault codes, protection alarms, LED blink sequences, and step-by-step diagnostic fixes for the Rivian R1S.

1 Documented Faults • Full Multimeter & Safety Isolation Procedures

Indexed Fault Codes for R1S

Step-by-step resolution manuals and root cause matrices

1 Codes

CODE BMS_b035 Severity: Critical Difficulty: Advanced

Contactor Opening Isolation Degradation

The Battery Management System (BMS) detected chassis isolation resistance dropping below the safety threshold (<500 ohms/volt or <100 kOhm total) during high-voltage operation, triggering an emergency opening of the main contactors to prevent electric shock and thermal hazards.

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