CriticalCommonElectrical

Toyota Voxy: ZWR80 12V Auxiliary Battery Hybrid System Lockout

ZWR80 12V Auxiliary Battery Hybrid System Lockout is a common electrical fault on the Toyota Voxy on the 2014–2022 cars, and we rate it critical. Putting it right costs $180 to $480 at New Zealand independent workshop rates. Below is what goes wrong, the symptoms to notice on a test drive, where to look, and what to ask the seller before you hand over any money. It is one of 32 documented faults on the Toyota Voxy.

Vehicle: Toyota Voxy
Years: 2014–2022
Fuel: hybrid
System: Electrical

This page covers the Toyota Voxy as a model. Some faults only affect particular engines or build years — enter a plate below to narrow the list to one car.

All Toyota Voxy faults32 documented faults on this model

What you are looking at

No photograph available

We do not hold a verified photograph of the 12V battery yet. We would rather show none than show a picture of a different part.

What goes wrong

The ZWR80 hybrid relies on a conventional 12V lead-acid auxiliary battery (located in the luggage compartment) to power body and chassis control modules and to wake the high-voltage hybrid system. When this battery degrades — typically after 5-7 years or following extended periods of disuse common in grey import storage — the hybrid system cannot complete its self-test on startup. The result is a failure to illuminate the READY indicator, accompanied by simultaneous master warning, red hybrid triangle, VSC off, brake, and ABS warning lights. In some cases clicking relay sounds are audible from the relay block but the car will not start. This fault is frequently misdiagnosed as a high-voltage battery or inverter failure, leading to unnecessary expensive repairs. The fix is almost always a simple auxiliary battery replacement, but Toyota-spec absorbed glass mat (AGM) batteries are required, not standard flooded lead-acid units.

What you would notice

Vehicle will not enter READY mode despite normal HV battery charge
Five or more simultaneous warning lights on instrument cluster
Red hybrid system warning triangle illuminated
VSC, ABS, brake, and master warning lights all on
Clicking from relay block when start button pressed but no READY

How to check it

Where to look. Luggage compartment beneath the floor panel, typically on the left/passenger side under a plastic cover

Battery must hold above 12.4V resting and above 11.5V under load. Check the battery manufacture date code on the label. Corrosion on battery terminals indicates age. Ask when it was last replaced — grey imports arriving in NZ may have 6-8 year-old batteries from Japanese domestic service. If a workshop inspection is possible: Load-test the 12V auxiliary battery (under the luggage compartment floor panel, typically passenger side).

Parts involved: 12V battery.

What it costs to put right

$180 to $480 at New Zealand independent workshop rates. That is for this job on its own, not for the car.

An estimate, in NZD, for the repair as normally carried out. What a specific car costs depends on which part has failed and what it damaged on the way — treat this as the floor for a negotiation, not a quote.

Ask the seller

“When was the 12V auxiliary battery last replaced?”
“Has the vehicle ever shown multiple warning lights simultaneously on startup?”
“How long was the vehicle stored before or after importation to NZ?”
“Has the vehicle ever been diagnosed for a hybrid system fault that turned out to be the auxiliary battery?”

Now check the Toyota Voxy you are actually looking at

Everything above is true of the model, and it is free. What it does not tell you is whether THIS car has been looked after: its odometer history and whether the reading has ever gone backwards, whether there is still money owing on it, whether it has been reported stolen, how many owners it has had and what it is really worth today. That comes from the official records for that plate. Enter the plate for the free details, or get the full history and a market valuation from $13.49.

Not sure what you would be paying for? See what a full KickTyres check includes.

Where this comes from

The failure described above is documented in published sources — owner forums, technical service bulletins, recall notices and workshop write-ups — held in our fault database. The inspection instructions and the cost estimate are KickTyres’ own interpretation of them, and it is a starting point for an inspection rather than a manufacturer statement.

Toyota Voxy buyer questions

Is zwr80 12v auxiliary battery hybrid system lockout serious on a Toyota Voxy?

We rate it critical and common on the Toyota Voxy. The ZWR80 hybrid relies on a conventional 12V lead-acid auxiliary battery (located in the luggage compartment) to power body and chassis control modules and to wake the high-voltage hybrid system. When this battery degrades — typically after 5-7 years or following extended periods of disuse common in grey import storage — the hybrid system cannot complete its self-test on startup. The result is a failure to illuminate the READY indicator, accompanied by simultaneous master warning, red hybrid triangle, VSC off, brake, and ABS warning lights. In some cases clicking relay sounds are audible from the relay block but the car will not start. This fault is frequently misdiagnosed as a high-voltage battery or inverter failure, leading to unnecessary expensive repairs. The fix is almost always a simple auxiliary battery replacement, but Toyota-spec absorbed glass mat (AGM) batteries are required, not standard flooded lead-acid units.

How much does it cost to fix on a Toyota Voxy?

$180 to $480 at New Zealand independent workshop rates. That figure is for this job on its own. A car showing the symptoms on this page is usually worth either walking away from or negotiating down by at least the repair figure.

Which Toyota Voxy years are affected?

Our research records this fault on the 2014–2022 Toyota Voxy. Build dates move around, especially on imported cars, so treat the range as the years to look hardest at rather than a guarantee either way. The official records tell you the exact build and first registration date for the car in front of you.