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Home >> Lexus >> 2003 >> LS 430 >> Repair and Diagnosis >> External Pages >> Different car >> Section 335 (Wireless Door Lock Control System) >> Wireless Door Lock Control System >> Inspection >> Check Battery Capacity
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Check Battery Capacity

WARNING: This page is about a different car, the 2002 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
  • Make sure to use the TOYOTA electrical tester.
  • With the battery unloaded, judgement can not be made whether the battery is good or not on the test.
  • When the transmitter is faulty, the energy amount left in the battery might not be read correctly.
  • On the lithium battery used for the transmitter, voltage of more than 2.5 volts with the battery unloaded is shown on the tester until the energy is completely consumed.

    Accordingly when inspecting the energy amount left in the battery, it is necessary to measure the voltage when the battery is loaded (1.2 k/Ohm).

  1. Remove the cover using a screwdriver.
  2. Remove the battery (lithium battery) from the transmitter.
    Fig 1: Removing & Installing Lithium Battery
    G01896157Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. Connect the lead to the (-) terminal of the transmitter and install the battery.
  4. Connect the (+) tester to the (+) battery (lithium battery), and (-) tester to the lead respectively.
  5. Press one of the transmitting switches on the transmitter for approximately 1 second.
  6. NOTE:
    • When the temperature of the battery is low, judgement can not be made correctly.

      When the outcome of the test is less than 2.1 V, conduct the test again after leaving the battery in the place at 18 °C for more than 30 minutes.

    • By auto power off function, the voltage becomes no load voltage (more than 2.5 V) condition after 20 seconds from when the switch was pressed.

      Make sure to read the voltage before 20 seconds elapses.

    • High voltage might be shown 1 to 2 times after leaving the battery, judgement should be made with the voltage shown at the 3rd time or later.
    Fig 2: Checking Battery Voltage & Locating Transmitter Switch Button
    G01896158Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  7. Press the transmitting switch on the transmitter again to check the voltage.

    Standard: 2.1 V or more. 

  8. Disconnect the lead.
  9. Set the battery (lithium battery) in the transmitter.
  10. Install the cover, so that the rubber cover is not distorted or slipped off.