EV Service Technician Interview Questions — Workshop & Field

EV service technician interviews are practical-first. Most OEMs and dealerships will combine an oral interview with a hands-on diagnostic test. Here's the question set you'll face — and the test you should be ready for.

HV safety (5)

• Walk through your LOTO procedure before opening a battery pack.
• What PPE do you wear for HV work?
• How do you verify isolation before touching live components?
• What's the role of the MSD / service plug?
• What do you do if you detect a thermal-runaway smell on a serviced pack?

Diagnostics (7)

• A customer reports their EV won't power on. Walk through your diagnostic sequence.
• How do you read DTCs on a Tata Punch EV?
• Customer complains of reduced range. What's your investigation?
• How do you test a charger that's tripping the breaker?
• Walk through inverter fault diagnosis.
• How do you check cell-imbalance from the OEM scanner?
• What's your sequence when a vehicle reports a 'service required' lamp?

Customer + workflow (5)

• How do you explain a complex repair to a non-technical customer?
• How do you handle a customer who insists their warranty should cover a non-covered repair?
• Walk through your DMS workflow for a job card.
• How do you maintain first-time-right scores?
• What's your sequence when a part you need isn't in stock?

Where to go from here

If you've got an OEM-issued certification (Tata, Mahindra, Ather, Ola, Hero) lead with it. Bring printed copies of your ASDC and OEM certifications. Be ready to demonstrate using a multimeter, insulation tester and the OEM diagnostic scanner if the interview includes a workshop component.

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