Question about 2003 Toyota Highlander

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2003 Toyota Highlander Alarm Goes Off ?

Disconnect car battery every night.

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  • Toyota Master
  • 14,036 Answers

Problem could be in door central locking system or body ecm.let dealership check it out.

Posted on Jan 10, 2013


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Posted on Jan 02, 2017

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SOURCE: 2008 Toyota Highlander alarm goes off for no

You most likely have a bad hood latch switch you can unplug this switch until you get it repaired to stop the alarm from going off.
See Toyota TSB

Posted on Nov 04, 2009

  • 160 Answers

SOURCE: I can't disconnect my '98 toyota camry car alarm.


Posted on Apr 19, 2009

  • 5763 Answers

SOURCE: 2003 Toyota Matrix won't start. No click when we

yes theres is, try locking and unlocking the pass/side door with the key. you can check for power at the starter at the small wire if theres power at that wire when the key is held in the crank position then you have a bad starter try taping on starter while key is held in start if its starts when tapping then starter is bad,heres a diagram to show you were to tap and where to check for power, hope this helps.4a6e88f.jpg8d713e8.jpg

Posted on Feb 10, 2010

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SOURCE: where is the OBD connector on a 2003 toyota highla...

It is located on the bottom of the Driver's side dash, below and to the left of the steering wheel. The connector is recessed about an inch and has a black cover that has "OBDII" imprinted on it.

Posted on Jun 25, 2010

  • 273 Answers

SOURCE: 2003 Toyota Highlander clock resets when I turn off the ignition

Have you checked any fuses? Does the climate control light up? If not then in the under hood fuse box (left of drivers side) check the ECU-B fuse should be 7.5 amp. Check the heater fuse in the fuse box inside the car it should be 15 amp. If the fuses are OK and only the clock is bad check out my site I offer a repair service.

Posted on Jul 18, 2010

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1 Answer

Jump start highlander

Dealer ! Battery Disconnect or Replacement Problems Dead battery same as disconnected battery . Electronics go night - night !

Apr 16, 2016 | 2011 Toyota Highlander

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My Toyota Highlander alarm keeps beeping at a few minutes to11am and 2pm without anyone touching it. I want it reset

Disconnect the battery ground for a couple of days.It will reset once you hook it back up.Otherwise,unplug the alarm from the system.

Apr 09, 2014 | 2003 Toyota Highlander

1 Answer

2003 Highlander with 41k miles. Alarm started going off every 20-30 minutes since friday night. Didnt realize it was ours. so embarrassed. Found out about 9pm. also noticed car keys wont open doors...

sounds like you have a faulty vehicle battery or that the contacts at the battery are corroded. The keys will not open the lock manually>?>>??. If the window is down or the door is open, pop the hood and check the battery for corrosion. If you have a friend with a pair of jumper cables, attach them to your battery following the correct procedure and see if door will unlock.

Aug 19, 2013 | 2003 Toyota Highlander

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Alarm goes off when it is cold outside (low 30's-So Calif)

When batteries get cold they loose voltage.
The car alarm probably thinks someone is tampering with the vehicle.
Check car battery and alarm backup battery for poor functionality and replace.

Dec 31, 2012 | 2005 Toyota Corolla

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2004 Highlander rear hatch sets off the alarm.

the switch is bad on the rear hatch cylinder

Aug 14, 2012 | Cars & Trucks

1 Answer

Car: 1997 Toyota highlander Problem: alarm went off, lights flashing, car won't start Fact: Just got car serviced a month ago

This is going to sound dumb but if the battery is bad or going bad it will sound the alarm with flashing lights and won't start.

Aug 26, 2010 | 2006 Toyota Highlander

1 Answer

2008 Toyota Highlander alarm goes off for no reason--unhook battery cable to stop it

You most likely have a bad hood latch switch you can unplug this switch until you get it repaired to stop the alarm from going off.
See Toyota TSB

Nov 04, 2009 | 2008 Toyota Highlander

1 Answer

Vsc light comes on when I put in drive or reverse on my 2002 toyota highlander - hose was pulled out of air filter assembly when oil changed and reconnected but light still goes on- easy fix?

Have patience and light will go off. Or you can go to advance auto to clear it for you. Or you can disconnect the battery for 10 seconds. Your choice.

Sep 04, 2009 | 2001 Toyota Highlander

1 Answer

2002 highlander radio code

Good news: You do not have to worry about you issue.
Your radio (if it is a "factory" radio) does NOT require a security reset code. You do not have an "anti-theft" radio. You can disconnect the battery cables at will, and the only issue you will have is that you will lose the preset stations that you set manually.
The "anti-theft" radios were abandoned by Toyota several years ago. Hope this eases your mind.

Oct 14, 2008 | 2003 Toyota Highlander

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