Accord Hybrid (2014-2017)

1. 1

   Primary
   Push and HOLD the START/STOP (power) button for about 3 seconds to power the vehicle OFF — this is the OEM-preferred HV shutdown. Confirm the vehicle is fully off (no READY indicator).

   START/STOP power button on the dashboard (driver side, right of the steering column).

2. 2

   Backup
   If the vehicle cannot be powered off normally (crash damage, no dash access): disconnect or cut the 12 V battery NEGATIVE cable AND the DC-to-DC converter cable. Cutting both removes the low-voltage power that keeps the HV contactors closed, opening the HV system.

   12 V battery — see twelveVolt.location (engine compartment). DC-to-DC converter cable — routed in the engine bay; identify per the OEM ERG diagram before cutting. # exact DC-DC cable position is shown in the ERG diagram, verify on-vehicle.

Note
OEM HIERARCHY (from the Honda 2014-17 Accord Hybrid Emergency Response Guide, as quoted across the official Honda ERG, Honda Canada ERG, NFPA mirror, and Boron Extrication): 1. BEST: press and hold the START/STOP button ~3 seconds to power off. 2. SECOND-BEST: cut/disconnect the 12 V battery NEGATIVE cable AND the DC-to-DC converter cable. In a collision severe enough to deploy one or more airbags, the Accord Hybrid is designed to AUTOMATICALLY open the high-voltage contactors, disconnecting the HV battery from the rest of the HV system. HOWEVER — the OEM guide is explicit: ALWAYS ASSUME THE HV SYSTEM IS STILL POWERED and perform the shutdown steps anyway. Auto-disconnect is not a substitute for manual depowering. SRS/AIRBAG HOLD-UP: airbags and seat-belt pretensioners can retain power for UP TO 3 MINUTES after the 12 V system is turned off. Wait the full 3 minutes before working near any SRS component. This is a salvage/dismantling card: there is NO orange "service plug grip" cut loop documented for first-responder removal on this car the way Tesla uses a first-responder loop — the OEM depower path is the power button, then 12 V + DC-DC cable. A qualified tech removing the IPU will pull the HV battery service disconnect at the pack; verify zero voltage on the orange cables with a CAT III meter before any HV contact or cutting. # service-disconnect-at-pack step is standard HEV practice / not a verbatim quote from the responder ERG.

12V location: Under the hood, on the DRIVER'S side (OEM-text, AEG49205: 'A conventional 12-volt battery is located under the front hood of the vehicle'). The official ERG sentence says 'under the front hood' without naming a side, but the OEM Key-Components diagram and the PCU description place the 12 V battery on the driver's side, adjacent to the Power Control Unit and the underhood fuse box. (An older 2014 Honda ERG rendering adds 'on the driver's side' to this sentence; the current AEG49205 text does not.)

The 12 V battery keeps the HV contactors closed and powers the SRS. The OEM backup shutdown is to cut/disconnect the 12 V NEGATIVE cable together with the DC-to-DC converter cable. After 12 V is removed, SRS can still fire for up to 3 minutes — wait it out. NHTSA recall 15V602 (2014-15 Accord Hybrid, ~6,786 vehicles) covers the HV-battery CELL VOLTAGE SENSOR (CVS): per the NHTSA Part 573 report, the CVS could misinterpret electrical noise and drop the car into a fail-safe EV mode (engine off, ~40 mph cap, eventual stall). The remedy was a hybrid-system SOFTWARE UPDATE, not battery hardware replacement — so this is NOT evidence of a physical HV-pack defect. Salvage relevance is minor: it's a known early-car software issue, not a reason to expect prior pack service.

SRS discharge: wait 180s after airbag deployment before touching SRS components.

Pack location: Behind the rear seat, in the Intelligent Power Unit (IPU), in a well-protected area between the rear seatback and the trunk bulkhead. (This is the 2014-2017 i-MMD Accord Hybrid layout; do not assume the under-rear-seat or trunk-floor location of other hybrids.)

Pack chemistry: Lithium-ion (Intelligent Power Unit / IPU). 1.3 kWh pack, 72 cells at 3.6 V nominal each (~260 V total). This is a Li-ion HEV pack, NOT NiMH — treat with Li-ion thermal-runaway caution despite the small pack size.

HV cable color:Orange

Do not cut:

• Orange high-voltage cables (entire routing — OEM ERG states HV flows through heavy-duty orange cables purposely routed AWAY from usual cut points; do not cut anything orange)
• HV lithium-ion battery / IPU footprint (behind the rear seat, between seatback and trunk bulkhead)
• DC-to-DC converter and its HV cabling (only cut the DC-DC cable as part of the deliberate backup-shutdown step, never incidentally)
• Power Control Unit / inverter and motor HV cabling
• SRS components (steering column, A-pillars, B-pillars, roof rails, seat-mounted side airbags, knee airbag area) — live for up to 3 minutes after 12 V off
• Seat-belt pretensioners
• Fuel tank, fuel lines, and EVAP system (this is still a gasoline vehicle)

Reinforcement (UHSS):

• A-pillars
• B-pillars
• Roof rails
• Rocker panels
• Rear bulkhead / rear seat structure around the IPU pack

Pack piercing risk: The Li-ion IPU sits behind the rear seatback ahead of the trunk. Any tool that penetrates the rear seatback, the rear parcel-shelf area, or the trunk front bulkhead (recip saw, cut-off wheel, spreader tip, fork-truck tine) can breach a cell and start thermal runaway. Power the car off (and pull the pack service disconnect, qualified tech) BEFORE any cutting at the rear of the cabin or the front of the trunk. The pack is small (1.3 kWh) but Li-ion — a breached cell can still vent and ignite.

Isolate damaged vehicle 25 ft from exposures.Verify

Live from NHTSA. Cross-check the VIN against nhtsa.gov/recalls before work.

Use Honda-designated pinch-weld lift points on the rocker panels only. Do NOT lift or jack under the rear bulkhead / rear seat area where the IPU pack sits, and do NOT lift under the fuel tank. # secondary — confirm exact pinch-weld points against the OEM body-repair/ERG diagram.

Coolant: Conventional engine coolant (Honda blue/green long-life) for the gasoline engine and the power-control unit; the HV IPU is air-cooled with no dedicated coolant loop. # secondary — confirm on-vehicle.

Electrolyte color: Li-ion electrolyte — clear, flammable carbonate-based solvent (vents as vapor if a cell is breached or overheats). # secondary/general Li-ion knowledge — the responder ERG does not print an electrolyte color.

If burning, toxic vapors:

• Hydrogen fluoride (HF)
• Carbon monoxide
• Volatile organic compounds (Li-ion electrolyte solvents)
• Nickel / cobalt / manganese / lithium / copper / aluminum oxides

Honda Accord Hybrid Emergency Response Guide (PDF) →

Last verified 2026-05-31 · mirror

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