Depower a hybrid vehicle and test high-voltage battery health
You are a technician completing your high-voltage authorisation in the hybrid and electric vehicle bay.
What has happened
Stock vehicle U2318, a 2023 hybrid SUV taken as a trade-in, needs a high-voltage battery state of health test and an inverter coolant service before Vehicle Sales can list it, on repair order RO-26-4497. The master technician will observe you plan and carry out the depower as part of your authorisation. A week ago an apprentice walked inside the EV bay barrier while a vehicle was depowered, so the Service Manager has made the barrier, signage and service plug control non-negotiable. The insulated gloves must be within their six-month test date, which is recorded in the Plant and Equipment Register. The vehicle must be reinitialised, checked and the result recorded before the pre-delivery checklist can be completed.
Deliverables
- Written job plan for the depower
- Repair order showing zero voltage verification, test results and reinitialisation
- Plant and Equipment Register check of gloves and meter
- Updated Vehicle Stock Register note for U2318
Documents to use
Systems to use
Repair Orders
Tracks every customer and stock vehicle job from booking to invoice with concern, work lines, parts, labour, quotes and quality check.
Vehicle Stock Register
Records every new and used vehicle in stock from acquisition or appraisal through reconditioning to sale and delivery.
Incident and Hazard Register
Records injuries, near misses, hazards, property damage and environmental spills with investigation findings and corrective actions.
Units of competency
Current on training.gov.au for the Automotive Retail, Service and Repair Training Package as at 10 September 2026.
AURETH011Depower and reinitialise hybrid electric vehiclesAURETH102Inspect and maintain battery electric vehiclesAURASA102Follow safe working practices in an automotive workplaceAURETR125Test, charge and replace batteries and jump-start vehiclesQualifications
AUR32721Certificate III in Automotive Electric Vehicle TechnologyAUR40626Certificate IV in Automotive Electrical TechnologyWhat to look for
Evidence guide
Evidence must show the depower sequence followed in order, glove and meter checks against the register before use, zero voltage verified and recorded with a witness, control of the service plug, and reinitialisation confirmed without fault codes. The barrier and signage must be in place before any high-voltage step. Observe the student directly.