Hybrids and battery-electric vehicles are showing up in every kind of shop, and their high-voltage systems are unforgiving. The ASE xEV Technician Electrical Safety Certification (Level 2) from the National Institute for Automotive Service Excellence (ASE) shows that you know how to protect yourself and others while working on those systems. The good news is that ASE publishes the exact standard the test is built on, and the test itself is short and focused.

In this guide, we’ll walk you through the test format, each section of the official Level TWO standard, the free ASE resources worth downloading, and the questions candidates ask most often.

What Is the ASE xEV (Level 2) Test?

ASE’s xEV program covers electrified propulsion vehicles (xEVs), a term that includes hybrids, plug-in hybrids, and battery electric vehicles. The program has two certification tests. Level 1 is an electrical safety awareness test for people who may simply encounter an xEV at work, such as people in sales, service, or repair roles who do not work on high-voltage components. Level 2 is for the person who actually works on the high-voltage system.

ASE’s standard calls this person a High-Voltage Vehicle Technician: a service professional who has received high-voltage electrical training and has demonstrated the skills to evaluate battery and high-voltage system conditions, isolate voltage, de-energize the system, perform general work on de-energized high-voltage components, and assess accident damage.

Level 2 is a safety certification, not a diagnostic test. It checks whether you can create and maintain an electrically safe work condition, choose and inspect the right personal protective equipment (PPE) and meters, and follow the correct de-energizing sequence.

What Is the ASE xEV (Level 2) Test Format?

Here is the test at a glance, based on the ASE xEV Safety Certifications page:

  • Questions: 30 questions.
  • Time: 60 minutes, taken in one continuous session.
  • Delivery: Online through ASE’s NetExam platform, not at a Prometric test center like the regular ASE certification series.
  • Fee: $49.99 per test (Level 1 is $38.99). Purchases are non-refundable.
  • Purchase window: Once you buy the test, you have 90 days to take it.
  • Results: When you pass, you can download and print a certificate.
  • Validity: ASE xEV certifications are valid for 5 years.
  • Passing score: ASE does not publish a passing score for the xEV tests.

With about two minutes per question, time pressure is rarely the problem. Precision is key: many questions hinge on one value, rating, or step order.

What Content Outline Does the ASE xEV (Level 2) Test Use?

The test is based on the ASE Electrified Propulsion Vehicles (xEV) High-Voltage Electrical Safety Standards, Level TWO, High-Voltage Vehicle Technician, Version 2.1, effective January 14, 2025.

The standard is organized into seven sections, labeled A through G. ASE does not publish a percentage weight or question count for each section, so treat every section as testable. In practice, Sections B, E, and F carry the most detail (PPE, de-energizing, and test instruments), so they deserve the most study time.

Section A: Purpose and Definitions

Section A sets the ground rules. It explains that “SHALL” marks a required condition and “MAY” marks a recommended one, which matters because many questions test whether something is mandatory or optional.

  • High-voltage is defined as greater than 30 V AC rms and greater than 60 V DC.
  • The three working levels: Level One (Electrically Aware Person), Level Two (High-Voltage Vehicle Technician), and Level Three (High-Voltage Vehicle and Battery Technician, who may do live work inside the battery pack).
  • What each level is permitted to do. For example, a Level One person shall not touch the manual service disconnect (MSD) or any high-voltage component.

Study tip: Be able to say which level may perform a given task. Work inside the high-voltage battery pack belongs to Level Three, not Level Two.

Section B: General Requirements for Electrical Safety-Related Work Practices

This is the largest section of the standard. It defines the electrically safe work condition and covers the hazards and protective equipment behind every high-voltage job.

  • Shock and electrocution risk, including the effects of current on the body and the three factors that affect shock severity.
  • Arc flash and arc blast hazards.
  • The equipotential bonding line and the loss-of-isolation circuit.
  • How to aid a person in contact with high voltage: call 911, disconnect the source, and separate the person with a non-conductive object such as an insulated retrieval hook.
  • PPE: Class 0 insulating gloves (rated 1,000 V AC and 1,500 V DC), leather over-gloves, sleeves, EH-rated footwear, Arc Class 2 face shields, ANSI Z87+ eyewear, and Class 0 insulating matting.
  • Insulated hand tools, barriers, signage, and boundary guarding.

What questions look like: Expect items on glove inspection and testing, such as the air or roll-up test before each use and the six-month electrical retest required under OSHA 1910.137.

Section C: Establishing an Electrically Safe Work Condition

Section C lists level-specific skills and employer responsibilities.

  • Follow OEM repair manual safety procedures and applicable service bulletins.
  • Wait the OEM-prescribed time after removing the MSD before touching high-voltage connectors or terminals.
  • Maintain a defined safety zone and place warning signs when high-voltage repairs are left unattended.
  • Shop responsibilities: an xEV service safety kit (car topper, barricades, cones, tape, fire extinguisher, gloves, and a glove leak tester), training records, and an emergency action plan that says to evacuate if the high-voltage battery is the fire source.

Section D: Safety-Related Work Practices

This section covers the components that create risk even when the car is shut off.

  • Lithium-ion battery characteristics, the battery management system (BMS), and IP65 to IP68 battery enclosures.
  • Accident risks: stranded energy and thermal runaway, plus isolating a damaged vehicle at least 50 feet from combustibles.
  • Handling battery packs that weigh roughly 500 to more than 3,500 pounds with proper lifting equipment.
  • Orange high-voltage cabling (FMVSS 305), and the rule never to pierce a high-voltage cable to take a reading.
  • High-voltage capacitors and the required discharge wait.

Section E: De-Energizing

Section E is the heart of the Level 2 role. It walks through the generic de-energizing sequence and the safety habits around it.

  • De-energize the system, ensure it cannot be reactivated, and verify zero voltage with a CAT III 600 V, CAT III 1000 V, or CAT IV 600 V meter.
  • The absence of voltage verification process, including the live-dead-live (LDL) test.
  • The high-voltage interlock loop (HVIL), lockout/tagout, the one-hand rule, and never working alone.
  • Never back-probe high-voltage connectors, and finalize the work with correct torque and reconnection order.

Study tip: Memorize the order of steps. Many questions give you four correct actions and ask which one comes first or next.

Section F: Test Instruments and Equipment for Electric Vehicle Applications

Section F treats your meter and leads as PPE.

  • Measurement categories under IEC 61010-1 and why CAT II 1000 V is not better than CAT III 600 V.
  • Test lead checks: shrouded connectors, finger guards, double insulation, and 0.1 to 0.3 ohms of lead resistance.
  • Probe tips with no more than 4 mm (0.16 in.) of exposed metal, correct replacement fuses, and differential probes for floating measurements.
  • Insulation testers, which apply 250 to 1,000 V, and the FMVSS 305 minimum of 500 ohms per volt.
  • Proving units for verifying a meter before and after a live test.

Section G: Addendums, Resources and References

The last section lists the regulations behind the document, including OSHA 29 CFR 1910 (1910.137 for insulating PPE, 1910.147 for lockout/tagout), NFPA 70E, FMVSS 305, IEC 61010-1, and SAE J2990 for first and second responders. Know which body covers what.

How Should You Use the ASE xEV (Level 2) Blueprint?

Because the test is short and the standard is a compact document, you can realistically cover all of it. The key is turning each “SHALL” statement into a question you can answer from memory.

  1. Read the standard once, start to finish. Highlight every number (voltages, currents, ratings, distances, time intervals) and every step sequence.
  2. Take a mixed baseline quiz. See which sections you already know from training and which feel unfamiliar.
  3. Map each miss to a section. Write the specific rule you missed, such as “insulation test happens before the HV battery is reconnected.”
  4. Drill sequences and ratings. Put extra time into Sections B, E, and F, where most of the detail lives.
  5. Finish with timed mixed practice. Aim to answer confidently and explain why each wrong option is wrong.

What Official ASE xEV (Level 2) Resources Should You Use?

Frequently Asked Questions About the ASE xEV (Level 2) Test

What is the passing score for the ASE xEV Level 2 test?
ASE does not publish a passing score for the xEV tests. Prepare to know the standard thoroughly rather than aiming for a target percentage.

Do I need work experience to take the ASE xEV Level 2 test?
No work experience requirement is listed for the xEV tests. That is different from the regular ASE certification series, which requires documented hands-on experience. The Level 2 standard does assume you have received high-voltage electrical training, so plan to complete that training first.

Do I have to pass Level 1 before Level 2?
ASE sells the two tests separately and does not list Level 1 as a prerequisite. However, the Level TWO standard says a Level 2 technician shall demonstrate Level One knowledge and skills, so review that material too.

How long is the certification valid?
ASE states that xEV certifications are valid for 5 years.

Is the xEV Level 2 test the same as the ASE L3 hybrid/electric test?
No. The L3 Light Duty Hybrid/Electric Vehicle Specialist test is an advanced diagnostic test in the regular ASE series. It requires A6 and A8 certification and has 45 scored questions in 2 hours. The xEV Level 2 test focuses only on high-voltage safety.

Start Preparing for the ASE xEV (Level 2) Test With Pocket Prep

Pocket Prep’s ASE xEV (Level 2) practice questions include 200 questions organized around all seven sections of the Level TWO standard, each with a detailed explanation of the correct answer. Try the free questions to find your baseline, then use Weakest Subject and Missed Questions quizzes to lock in the ratings and sequences that trip people up. A little focused practice now pays off every time you pick up an insulated glove.