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Many hybrid and electric vehicles are equipped with auxiliary batteries to support the operation of electronic accessories, including headlights, audio systems, and more. The power supplied by auxiliary batteries allows the vehicle’s high-voltage battery to focus its energy supply on the powertrain rather than vehicle accessories. It is vital to understand auxiliary batteries and be prepared to service them when called upon at Toyota Chula Vista in Chula Vista, CA.
The first step in servicing an auxiliary battery is finding its location. Different vehicle models have different placements for their auxiliary batteries. Common locations include the trunk, under a seat, under the floorboard, and under the hood. Consult Toyota’s Technical Information System (TIS) to learn about specific Toyota EVs and HEVs and their auxiliary battery location.
Auxiliary batteries occasionally require service or replacement. Drivers will be alerted of auxiliary battery issues through the loss of accessory functions, including radios, headlights, or blind-spot monitoring. Error messages and check engine lights may also be present. The first step in servicing an auxiliary battery is to test it with a conductance tester. Replacing auxiliary batteries is similar to replacing standard 12-volt batteries. The size and battery model are dependent on the specific vehicle. OEM Toyota batteries are required to meet Toyota service standards.
Charging Absorbant Glass Mat Batteries, or AGM batteries, must be done with careful consideration and attention to detail. Overcharging an AGM battery can weaken it and result in the tendency for quicker discharges. AGM batteries require a slow and steady charge that can take a few hours to complete. The charging voltage must be in the range of 14.1 – 14.4 volts DC.
It is not possible to explain everything there is to know about auxiliary batteries. But here are a few helpful hints and information bits that are important for all Toyota service technicians to be familiar with:
With the popularity of hybrid and electric vehicles continuing to increase, the requests for auxiliary battery services are likely to increase. Whether customers need to survive their Toyota Highlander, Camry, RAV4, or any other model, following Toyota’s service guidelines will ensure the best possible service quality. Refer to Toyota’s TIS to find the specific maintenance information necessary to complete certified Toyota auxiliary battery services in Chula Vista, CA.
