Why does my Lexus RX330 have parasitic battery drain?
We’ve got the same problem with our 2008 IS250. The battery and alternator are fine, so we had an electric specialist come and have a look. We learned that there’s a parasitic drain from the onboard body control module which is discharging the vehicle when it’s switched off.
Why does my 2001 Lexus RX300 not turn on?
I have the same problem with my 2001 rx, at first just thought to be an old battery. Bought an optima yellow top stuck it in turn right on. 2days go by and now does not turn on some power is there and it seems like it does want to turn on but doesn’t.
What does the ECU do on a Lexus?
This article applies to the Lexus IS, GS, RX, ES (2004-2014). The engine control unit, or ECU, is basically the brains of your car. The ECU stores diagnostic trouble codes when it senses a malfunction so a mechanic can fix it later. It’s also the ECU’s job to store your driving data to customize your ride.
When to know if your Lexus battery is draining?
If it is reading 250 miilamps or more, then you definitely have a drain. Then remove 1 fuse at a time and, starting with the under hood fuse panel and keep going until you find the circuit that is draining the battery. When you remove the correct fuse, the amp reading will drop down to the 50 or so milliamp target.
We’ve got the same problem with our 2008 IS250. The battery and alternator are fine, so we had an electric specialist come and have a look. We learned that there’s a parasitic drain from the onboard body control module which is discharging the vehicle when it’s switched off.
What to do about a parasitic battery drain?
If they exonerate your battery and alternator and you think that it is a parasitic draw then start the procedure that Mike described. Thanks Kep and Allen. It isn’t a dead cell, and I think the amp draw is not .20A like I thought …. it seems to depend on what range I have the meter set at.
How to fix a parasitic drain on a multimeter?
Disconnect the negative battery cable. On the amperage side of the multimeter dial, set it to 20 amps. Disconnect the negative battery cable. Touch a lead to the negative battery cable terminal. Touch the other lead to the negative battery post, completing the circuit within the multimeter, which will display the amp draw.
When did the battery die on my Lexus RX300?
After 3 weeks, the battery went dead, couldn’t start the car. Car was still in the parking lot, so we had it jumped started , and brought it to dealer for testing.
How to find the cause of parasitic battery drain?
Luckily, you can usually find the cause of a parasitic draw yourself. Start by connecting a digital multimeter to the negative battery terminal of your vehicle. Then, remove the fuses one at a time while watching for changes in the multimeter’s reading.
Disconnect the negative battery cable. On the amperage side of the multimeter dial, set it to 20 amps. Disconnect the negative battery cable. Touch a lead to the negative battery cable terminal. Touch the other lead to the negative battery post, completing the circuit within the multimeter, which will display the amp draw.
How to find out if your car battery is parasitic?
How to Find a Parasitic Battery Drain. When your car battery goes dead overnight, usually either the battery is at the end of its life span, or you left something on, such as a light.
What kind of battery drain does a GMC Quadrasteer have?
My 2004 GMC quadrasteer has developed a parasitic battery drain that kills the battery if it sits for more than a day. I’ve traced it to the BCM. I checked the drain with a meter after the truck had sit for 4 hours. The drain was about 3.5 amps. The drain after sitting for 12 hours was about 2.5 amps.
How to drain a battery from a BCM Silverado?
1) Using a D.C. Amprobe on the positive Cable I pulled the Fuses one at a time, at first I noticed no change, but with a little amount of time there will be change. 2) This is where the cooler of beer and a friend come into play.
My 2004 GMC quadrasteer has developed a parasitic battery drain that kills the battery if it sits for more than a day. I’ve traced it to the BCM. I checked the drain with a meter after the truck had sit for 4 hours. The drain was about 3.5 amps. The drain after sitting for 12 hours was about 2.5 amps.
1) Using a D.C. Amprobe on the positive Cable I pulled the Fuses one at a time, at first I noticed no change, but with a little amount of time there will be change. 2) This is where the cooler of beer and a friend come into play.
Where is the fuse box on a Lexus ECU?
Disconnect negative battery cable. This is the recommended way. It’s the easiest, there’s no risk of getting shocked by the battery, and it requires no special tools. All you need to do is remove and then re-install two fuses. Locate the fuse box under the hood on the passenger side near the strut tower.
Is there a problem with my Lexus battery?
Gonna have it checked at the dealer once more. Definitely something is draining the battery , even with engine, lights , etc. off. Any one has similar problems or clues ? Is 2 times problem enough to get it replaced under the California lemon law ?
When does a Lexus E350 battery go dead?
My lexus E350 battery goes dead if car is not used for a week. Had the battery checked with dealer says it is OK Clicking this will make more experts see the question and we will remind you when it gets answered.
Are there any problems with the Lexus RX300 battery?
I only have the RX330h. So far no problems with the battery , yet. im confused, do u drive an rx330, or an Rx400H. lol. If its a hybrid, try the hybrid forum instead of this one. 😀 I only have the RX330h. So far no problems with the battery , yet. im confused, do u drive an rx330, or an Rx400H. lol.
What to do if your Lexus battery is draining?
They probably have a Consumer Affairs toll-free number that links to a department in Sacramento. When your vehicle gets back to the dealer, insist that the alternator is thoroughly checked out before settling for just another new battery. Your alternator may not be delivering sufficient charge to keep the battery up to specs.
What should the battery voltage be in a new Lexus?
Most vehicles read between 12 and 14 volts when they are in operation. You could also have loose cables or corroded connections, although corrosion probably isn’t your problem if the vehicle is new. Have your alternator and your cables checked as a next step. Good luck and let us know how this turns out. Well, car is in the shop now.
What to do if your Lexus has a lemon problem?
Most states’ lemon laws require at least three or four repair attempts for the same problem before the customer has a case, but check with your Attorney General’s office for the exact details. They probably have a Consumer Affairs toll-free number that links to a department in Sacramento.
How often does a Harley Davidson battery drain?
Bike is under extended Warranty and they are saying SORRY we can’t fix it! Then they said to get a trickle charger, but I can’t don’t have access to plug it in! It discharges randomly, sometimes its 2 times in a week, sometimes 3 weeks it will stay charged.
Why does my 84 flhtc battery keep draining?
I believe I have a battery drain. Just purchased a new 350 cold crank amps and after a proper initial charge, and run, the next day the battery did not have enough juice to turn over. My 84 FLHTC has the EVO motor, and while it runs and sounds like a dream, starting it has become a issue. Any ideas?
What causes a Ford F350 battery to drain while parked?
Ford F350: Battery Draining While Parked 1 Battery Cables. You’ll want to take a look at your F350’s battery posts where they bolt to the battery. 2 Bad Battery. When the battery drains when parked, the odds are that it’s the battery itself. 3 Alternator. 4 F350 Battery Draining While Parked.
Why does my OnStar battery drain so much?
Community Answer In older vehicles running analog Onstar, the system will drain the battery because it is constantly looking for a signal. Onstar no longer offers an analog signal, only digital.