Question about 2002 Mitsubishi Diamante

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I have a 2002 Mitsubishi Diamante, the battery is brand new and the alternator has tested good. The car will start up and drive, eventualy the battery light comes on as well as all the other lights and then the car dies. What could cause this?

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  • 133 Answers

(1) Loose connection on your battery terminal(s). You should not be able to move the connections on your battery by hand at all. (2) Loose or missing alternator belt. (3) Faulty alternator. (4) Electrical short.

Posted on Feb 21, 2012

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Posted on Jan 02, 2017

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SOURCE: Mitsubishi Diamante 1995

Alldata diy is the way to go.  However, I can tell you.  Remove the intake plenum stay. then the roll stopper bar.  Unbolt alternator and then fish it thru to the passenger side.  ( you may need to remove some hoses, etc.  It WILL work,  I just did mine.  Chiltons says remove from under car, No way.  It must go thru to the passenger side.

Posted on Jan 23, 2009

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SOURCE: what is the easiest way

2002 diamante heater core sits in center of the dashboard just over the on board computer for the car. To access it you need to take out the console between the seats and the entire dashboard to get to it. The only thing wrong with the heater core is the leaking gaskets (about $10 in parts). Mitsubishi knows about the problem and when the dash is taken apart you will see a plastic sheet over the onboard computer to somewhat protect it from the leaking heater core gaskets. So the expense in the repair is in the labor to get it all apart and back together again. The dealers seem to replace entire heater core when they fix this problem. I did just the gaskets and that solved the problem. I have read others who did it themselves only replaced the gaskets and that solved it for them as well. Maybe the dealers think you will feel better replacing a larger part for so much labor.

Posted on Feb 18, 2009

  • 273 Answers

SOURCE: bad alternator

the alt is on your fan belt but not sure if it's top or bottom of your engine if it's the top then you might be able to loosen your belt tensioner remove the belt and unbolt the alt, mark all wires both on car and old alt, it really helps when refitting the new 1. then reversing the process to fit the new alt. if it's bottom of your engine then you might need to lift the engine, a lot of work.

Posted on May 19, 2009

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SOURCE: alternator removel on a 95 mitsubishi diamante

3.0 SOHC. TURN OFF RADIO. THEN DISCONNECT BATTERY NEGATIVE CABLE.REMOVE AIR CLEANER ASSEMBLY.LOOSEN THE TENSIONER PULLEY.REMOVE ALTERNATOR DRIVE BELT .REMOVE ACCELERATOR CABLE.REMOVE.BRAKE BOOSTER VACUUM HOSE.REMOVE EGR VALVE.REMOVE ALTERNATOR ELECTRICAL CONNECTORS. THEN REMOVE MOUNTING BOLTS THEN REMOVE ALTERNATOR. THE 3.0 DOHC DISCONNECT NEGATIVE BATTERY CABLE.REMOVE SURGE TANK.REMOVE AIR DELIVERY HOSES TO GAIN ACCESS TO THE ALTERNATOR .IF YOU HAVE AIR CONDITIONER .REMOVE THE CLAMP .RAISE THE SUCTION HOSE.USE SOMETHING TO HOLD IT OUT OF THE WAY.LOOSEN TENSIONER PULLEY .AND REMOVE THE ALTERNATOR DRIVE BELT .DISCONNECT THE OXYGEN SENSOR CONNECTOR .DISCONNECT THE ALTERNATOR ELECTRICAL CONNECTORS.REMOVE ALTERNATOR BRACKETS AND MOUNTING BOLTS .REMOVE THE BRACKET AND ALTERNATOR AS A ASSEMBLY.SEPARATE THEM ON A WORK TABLE.

Posted on Jul 05, 2009

  • 1 Answer

SOURCE: fREE MITSUBISHI DIAMANTE 2002 pdf service manual

how to change diamante brake pads

Posted on Jul 23, 2009

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Mitsubishi Diamante 2002 - slow battery drain when not running.


This problem may be a drain or a bad battery or alternator.

The first thing to do before going on trying to find the system that is draining the battery would be to have the battery tested and charging system tested.

A weak battery will seem ok after the car is jumped or will barely start the car and the alternator will charge it even though the alternator is overworking due to weak battery and during the day or when car does not sit long it will seem ok. then when car sits overnight or a few days battery will weaken on its own, making it look like a drain,

so first step is battery test and alternator/charging system test.

Jan 06, 2013 | 2002 Mitsubishi Diamante

1 Answer

Battery died after 1 week of jump start ?


Charge it all the way up. Then take it to a auto parts store and get the battery and starter and alternator tested.

Oct 13, 2017 | 2002 Mitsubishi Diamante

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My 1999 mitsubishi diamante will not start. I got a friend to jump it but it still would not start. I took the battery out and took it to autozone to charge it. But autozone would not charge it because...


It sounds like you need a new starter. If you hear the starter click when you turn the key to start, replace your starter since you already replaced the battery. You might want to have your alternator checked out, or when you get your car started, test the battery terminals with a multimeter. You should have around 14 volts with the car running. If not, you will need a new alternator. The alternator won't keep the car from starting though, unless the battery was drained because it wasn't charged. Even then it is the battery keeping the car from starting.

If the starter is not clicking, check your fuses under the hood. If all checks out, you may have a bad ignition switch.

Jul 02, 2011 | 1999 Mitsubishi Diamante

1 Answer

How do I remove the alternator on my 2002 Mitsubishi Diamante?


loosen the tension of the belt by loosening the screw that is on top of alternator,then loosen the two bolts ,that are on the side of alternator ,remember how the belt diagram is so that you won't have any issues putting it back ,good luck

Apr 26, 2011 | 2002 Mitsubishi Diamante

1 Answer

1992 Mitsubishi Diamante won't start


have you had the alt. tested if not when u get it running take to the nearest auto zone they will check it for free that is what it sounds like to me that it is not charging

Feb 11, 2009 | 1992 Mitsubishi Diamante

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