Highlander Hybrid Drive Systems: Auxiliary Battery Maintenance (Page 157)
3. Remove the positive (+) terminal cover.
4. Check the battery SOC.
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If the battery voltage is LESS THAN 12.6 V, then continue to step 5.
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If the battery voltage is 12.6 V or MORE replace the positive (+) terminal cover and close the hood.
NOTE
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If measuring the voltage with the negative (-) terminal connected, turn OFF all electrical Systems and wait 60 seconds or more. This removes
the surface charge.
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If the engine has been running before measuring the voltage, wait 20 minutes or more after the engine stops. This removes the surface charge.
5. Charge the 12-volt auxiliary battery using the GR8 Battery Diagnostic Station (SST P/N 00002-MCGR8).
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 nominal outlet and flip the power switch to the "ON" position.
C. Once the charger is properly turned ON, perform a diagnostic charge by "MODEL (Highlander HV).
The GR8 Battery Diagnostic Station will indicate result when complete.
NOTE
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
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Charge in a well-ventilated area.