Lexus IS250 U Owner's Manual page 503

Connect the jumper cables according to the following procedure:
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Connect a positive jumper cable clamp to the positive (+) battery terminal
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on your vehicle.
Connect the clamp on the other end of the positive cable to the positive (+)
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battery terminal on the second vehicle.
Connect a negative cable clamp to the negative (-) battery terminal on the
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second vehicle.
Connect the clamp at the other end of the negative cable to a solid, station-
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ary, unpainted metallic point away from the battery and any moving parts,
as shown in the illustration.
Start the engine of the second vehicle. Increase the engine speed slightly and
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maintain at that level for approximately 5 minutes to recharge the battery of
your vehicle.
Open and close any of the doors of your vehicle with the engine switch off.
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Maintain the engine speed of the second vehicle and start the engine of your
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vehicle by turning the engine switch to IGNITION ON mode.
Once the vehicle' s engine has started, remove the jumper cables in the exact
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reverse order from which they were connected.
Once the engine starts, have the vehicle inspected at your Lexus dealer as soon
as possible.
IS350/250_U (OM53C50U)
8-2. Steps to take in an emergency
503
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