Question about 2005 Lexus GX470

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Battery dies every 7-10 months on a 2005 GX470 and the dealership cannot find the problem. Their solution is a new battery. They blame us for leaving something on & of course nothing is left on. Must be some type of intermittent draw......????

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Probably leakages or poor charge. Measure the electricity consumption when everything is OFF, then measure the Charge currency.

Posted on May 19, 2011


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Gx470 shuts off after replacing battery and increasing rpms

I think you will have to take it to the dealers to have it read on the correct software here,i suspect a ECU suffering from brown out ,where the voltage drops and this causes damage as i do get this from the long term airport parking companies where they fail to disconnect the battery .Normal cure is a new ECU plus programing ,although i often find a scrapper intact and swop the whole lot over but what your problem is i just do not know from a question on here sorry

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If the ammeter is the inductive type that has a probe that goes around the negative battery cable, while the negative battery cable is connected, and the positive is connected, the draw should also be less than .2 Amps.

If the draw is .8 Amps, for example, then that's too high and can cause a dead battery in a few months.

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When I turn the key I only hear clicking sounds and dose not start the lights turn on and the battery was changed about a month ago

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The easiest thing to do is to check the generator. If you have a voltmeter, check the voltage across the battery terminals while the car is running. You should get a reading of approximately 14.9 volts which means the gererator is working. With the engine off, check the battery voltage, it should be 12 volts. if it reads less (say 9 or 10 volts), the battery is not holding the charge and needs to be replaced. Also make sure you have good CLEAN TIGHT connections between the battery terminals and the leads. Sometimes a loose connection or oxidation between the terminals and the connector causing a poor connection is to blame.

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