Question about 2003 Toyota Matrix

1 Answer

Battery light alternator

Wind battery lite comes on nothing works hade battery check and altatnotor check bothh where ok

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Toyota Master
  • 20,706 Answers

The Charge lamp comes on with the Alternator fails to keep battery charge going. (lots of way to fail, and ALT Is 100% good) it's a system. each part of it must be good, end to end.
so...
i put my voltmeter across battery, i start car, i see 13.3 to 15vdc, alt is good.
no? , i see now, 12.2v. ALt is dead, (i didnt say bad) and battery is sightly discharged, 12.6v is charged. (key off, rested voltage)
This 12v tells me the ALT is shut down. only why is the question.

how can any charge system fail,
bad battery tops the list here, they LOVE to fail.
1: belt slips.
2: belt missing
3: bad alt.
4: bad wires to ALT . (corrosion on any wire or lug)
5: fuses blown , any listed below.:
your alt is not an ECU controlled, alt ,its 100% self contained

did you ever remove the ALT and blow the 100 amp fuseable link
the first step of any alt pul, is the pull the NEG, battery lug or BOOM.

im logged in to alldata.com so can you.

and what do i see.
a 5 wire ALT. one is the frame ground, so it must not be rusty or..... it fails. frame to engine block. no rust here.

wire L , yellow.goes to dash LEDs (alt failure idiot lamps) (this works)
wire. S white goes to ALT 5a fuse, is it blown?
wire :B B/G color, goes to the 100 amp link fuse. (blown>?)
wire IG Red-white, goes to a fuse marked 10A gauge.

i think the IG wire is the voltage sense wire.
no sense, no charge. I think the whole I/P dash cluster goes dead when this fuse blows.

The S wire is the boot strap voltage sense, it wakes up the regulator .
if open , the reg stays asleep, as does ALT.
Alternators can not self start, the regulator has boot strap device
that cures that. called self excitation. so this wire is critical.
All wires except the L wire is critical. in this case.

the B wire is the big wire, it charges the battery . 50amps or more..

any of the 5 paths open , kills the ALT dead.
The REG inside the ALT can also shut it down.
eg: battery bad, with huge cell resistances. total.
eg: overvoltge for any reasons. including attempts top run car with no battery, (dont ask)
eg: over current (battery cells 1 to 6 shorted) or 25 KC lamps added.
eg: over temperature shut down.

that is about it.







Posted on Jan 02, 2014

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

Battery light comes while driving


Someone is missing something. Suggest alternator may be putting out voltage but not amperage or vice versa.

Apr 01, 2014 | Ford Cars & Trucks

1 Answer

I have a 2005 ford escape my battery died twice i hade the alternator check.the say it ok.


It could be a corroded wire terminal. i think your alternator is controlled by the engine computer, so that circuit needs to be checked too.

Jul 28, 2011 | 2005 Ford Escape

1 Answer

I HAVE A 1995 F350 DIESEL. WE RECENTLYU CHANGED BOTH BATTERIES AND HAD A NEW ALTERNATOR INSTALLED. AFTER ABOUT A MONTH, THE BATTERY LIGHT KEEPS COMING ON WHEN DRIVING AND GOING OFF WHEN STANDING. WHAT...


First things first check whether the alternator is charging by starting the engine and whilst in neutral gear open the bonnet and remove negative terminal from your battery and leave the positive one in its place . If the vehicle stops then then the alternator is not charging but if it is still on then the alternator is very Ok.

But since the battery light is on as the car is on it means that the alternator has a problem . It is either the brushes are finished or the armature winding is bruised hence causing a short circuit .

Jul 19, 2011 | 2004 Ford F350

2 Answers

Battery light on and break light on


Break light is no joke have the brake system checked for internal and external leaks . If none are found then itspossibly the brake hand / foot switch.

Battery lite could be incorrect battery or alternator is defective or the wiring behind alternator is corroded and lastly voltage regulator may be defective.

May 21, 2010 | 2002 Isuzu Rodeo

2 Answers

My battery light indicator on dash board stays on


This is usually caused by a faulty alternator.
It stays on because the alternator is not generating sufficient voltage on the control winding to extinguish it.

Check battery terminal voltage while motor running with headlights on or blower fan running.
Terminal voltage should be approx 14.5V.
Ensure alternator and engine are properly connected to ground and the battery negative terminal.

Oct 08, 2009 | Nissan 200SX Cars & Trucks

2 Answers

Put key in ignition .All lights come on nothing happens battery ok starter n alternator ok battery ok b m w 318 ti


If you have an Alarm system the Alarm may be cutting off the power to the starter, bypass the alarm and try.

Sep 03, 2009 | 1994 BMW 3 Series

1 Answer

I have a 02 ford escape xls battey warning lite came on while driving home from work got home car will not start there is a clicking noise like the battery is dead but lights radio ect still going strong


Check your alternator drive belt if thats ok get the alternator tested .Your battery may have enough juice to power the lights but not enough to turn the engine . Try jump starting it.
Hope this helps

Jun 28, 2009 | 2005 Ford Escape

2 Answers

Battery light comes on and goes off


CHECK ALL WIRES THAT GO TO ALTERNATOR.CHECK BATTERY BY TESTER( LOAD).CHECK WIRES FROM IGNITION SWITCH (YELOW) WITCH GO TO ALTERNATOR.AND CHECK GREEN RED WIRE WHITCH GO TO ALTERNATOR WITH IGNITION ON. IT SHOUD BE 12V AND WITH ENGINE RUNNING IT SHOUD SHOWS NOTHING.IF EVERY THINK OK - REPLACED ALTERNATOR.WITH EVERY THING OK VOLTAGE SUPOUS TO BE 13.8 - 14.5 V

Feb 18, 2009 | 1998 Lincoln Town Car

3 Answers

2001 Hyundai Santa Fe Alternator gone bad-dealership said...


brake light and battery light come on with bad alternator--if replacing your self 1st remove front right tire--then the splash panel

Oct 31, 2008 | 2001 Hyundai Santa Fe

Not finding what you are looking for?
2003 Toyota Matrix Logo

186 people viewed this question

Ask a Question

Usually answered in minutes!

Top Toyota Experts

yadayada
yadayada

Level 3 Expert

75797 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22114 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8152 Answers

Are you a Toyota Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...