Hybrid System - HV/Auxiliary Battery Maintenance
L-SB-0017-12March 21, 2012
Maintenance for HV & Auxiliary Batteries
Service Category
General
Section
Pre-Delivery Service
Market
USA
Applicability
Introduction
Hybrid vehicles are equipped with 2 types of batteries:
^ Hybrid Vehicle (HV) battery
^ 12-volt auxiliary battery
If the vehicle is put into storage the state of charge (SOC) of its HV battery and auxiliary battery will gradually decrease. To prevent the auxiliary battery from becoming discharged during storage proper maintenance is necessary.
Please perform the following maintenance service for the HV battery and 12-volt auxiliary battery.
NOTE
^ Before disconnecting the auxiliary battery, confirm the shift lever is in the "P" position and apply the parking brake completely. The shift lever cannot be shifted from the "P" position with the 12-volt auxiliary battery disconnected.
^ If the negative (-) terminal of the auxiliary battery is reconnected, even if the power switch is selected to the "START" mode, the hybrid system may NOT start. In this case, push the POWER switch to select "START" again to start the hybrid system (the "READY" light is ON). If the hybrid system still does NOT start (the "READY" light is OFF), refer to the Repair Manual.
Maintenance Items
Warranty Information
Required Tools and Equipment
Before Delivery
Fully charge the 12-volt auxiliary battery:
1. Before charging the auxiliary battery turn OFF all lights and accessories.
2. Locate the 12-volt auxiliary battery.
3. Remove the positive (+) terminal cover.
4. Check the battery SOC.
^ If the battery voltage is LESS THAN 12.6 V then continue to step 6.
^ If the battery voltage is 12.6 V or MORE replace the positive (+) terminal close the battery cover install the luggage compartment floor mat and close the trunk.
5. Test the 12-volt auxiliary battery using the GR8 Battery Diagnostic Station (SST P/N 00002-MCGR8). If charging is required the GR8 will automatically start to charge.
A. Connect the red charger clamp to the positive (+) battery terminal and the black charger clamp to the negative (-) battery terminal.
B. Plug the charger into a grounded 110-volt outlet and flip the power switch to the "ON" position.
C. Once the charger is properly turned ON, perform a diagnostic charge by "MODEL" (select the appropriate vehicle model). The GR8 Battery Diagnostic Station will indicate result when complete.
If the battery tests bad ("Replace Battery") replace the auxiliary battery.
NOTE
^ If the vehicle model is not listed in the model list, charge by battery stock code. To charge by Stock Code, reference the Battery Stock Code Chart located on the "Battery" page on TIS.
^ If the auxiliary battery was stored at 32°F (0°C) or below, charge the auxiliary battery in a room above 32°F (0°C).
CAUTION
^ Charge in a well-ventilated area.
^ Do NOT allow sparks or fire near the auxiliary battery.
6. If the GR8 Battery Diagnostic Station is NOT available, you may charge the 12-volt battery by turning the vehicle to "READY" ON.
^ Run time will vary depending on the state of charge.
^ If this method is used, you MUST confirm that the battery is charged to 12.8 volts using a DVOM.
To Store for 30 Days or More
Disconnect the negative (-) terminal:
1. Turn OFF all lights and accessories.
2. Disconnect the negative (-) terminal.
Every Two Months
Cycle vehicle to "READY" ON:
NOTE
^ When the remaining capacity of the HV battery is low, the gasoline engine automatically starts and the HV battery is charged. The 12-volt auxiliary battery is also charged by the HV battery regardless of the gasoline engine operation.
^ Be sure to reconnect the negative (-) terminal of the auxiliary battery before performing this procedure.
1. Park the vehicle in open air or connect the exhaust extraction hose to the exhaust pipe.
2. Apply the parking brake.
3. With the brake pedal depressed push the POWER switch and check that the "READY" light in the meter illuminates when the hybrid system starts (the "READY" light is ON).
4. Turn OFF all lights and accessories.
5. Check that the shift lever is in the "P" position.
6. Keep the "READY" light on and charge the HV battery for 30 minutes.