2002 Lexus ES 300FACTORY OEM SERVICE PROCEDURE

On-Vehicle Inspection

  1. CHECK BATTERY ELECTROLYTE LEVEL.  Check the electrolyte quantity of each cell. If under the lower level, replace the battery (or add distilled water if possible) and check the charging system.
  2. CHECK BATTERY VOLTAGE. 
    1. After having driven the vehicle and in the case that 20 minutes have not passed after having stopped the engine, turn the ignition switch ON and turn on the electrical system (headlight, blower motor, rear defogger etc.) for 60 seconds to remove the surface charge.
    2. Turn the ignition switch OFF and turn off the electrical systems.
    3. Measure the battery voltage between the negative (-) and positive (+) terminals of the battery. If the voltage is less than specification, charge the battery.
      1. Standard Voltage:  12.5-12.9 V at 20°C (68° F)
      Fig 1: Checking Battery Voltage
      G03146002Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Check the indicator as shown. See Fig 2.
      NOTE:
      • Blue:  OK
      • White:  Charging Necessary
      • Red:  Insufficient Water
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.