Question about 2006 Suzuki Grand Vitara

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06 Grand a vitara v6 overheating on open highway. Didn't do it in traffic or stop lights. Had aircon on as it was a hot 38 degree day. Aircon would get warm as temperature gauge went to red. Went back to normal fairly quickly once pulled over (within 2 minutes). Fan belt and coolant fine. Checked radiator and is bubbling slightly when fluid added. Is it linked to aircon? Had issues with it in past.

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  • Suzuki Master
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Bubbling when the coolant is full indicates a head gasket problem. have a compression test done to check for gasket/cracked head. have a flow test done on the radiator as the cores may be blocked reducing coolant flow.

Posted on Nov 07, 2014

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6ya6ya
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Posted on Jan 02, 2017

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Benimur
  • 6966 Answers

SOURCE: gages

Hi again,

Did the negative battery terminal removal able to reset the instrument CPU?

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards. Thank you for using FixYa.

Posted on Aug 19, 2008

  • 1 Answer

SOURCE: Temperature Gauge Is Pegging at HOT

Same problem on 2002 Montero XLS. Since manuals are impossible to acquire, I subscribed to ALLDATAdiy.com (not as good as a Haynes or Chilton's, but better than nothing). From there I was able to get the resistance tolerances for the gauge sending unit and computer temperature sending unit.

The temp gauge sender should have a resistance of 73 ohm at 176 degrees. Since the thermostat is 180, I figured once the engine warmed up, it would be close to that value. The resistance started out at ~700 ohms and gradually dropped to 50 ohms and was still dropping. But it had no wild fluctuations, so assumed it was ok. The computer temp sending unit has a resistance of .26k ohms to .38k ohms. It was rock solid at .24k.

Initially I had replaced the thermostat prior to finding this thread regarding the CPU board problem. Now after checking the resistance, I still wasn't confident that the gauge sending unit was ok (dropping down to less than 50 and still dropping - who knew how the firmware was programmed to translate that data?). Therefore, I went to Carquest and got a new gauge sending unit. Put it in and as you can expect, the problem is still occurring. However, the resistance value of the new one is a rock solid 59.4 ohms. So I question the reliability of the other unit, even though it didn't fix the problem.

AllDATAdiy also mentions a multi-function thermal sensor/switch. Unfortunately, the site does not show where this sensor is located, so I cannot even test.

At this point, I do not feel like taking it in to the dealership and spending money to have my dashboard sent to Michigan (bad design in my opinion that they can't reset/recalibrate at dealership), so I'm going to just buy a separate temperature gauge to mount under the dash. At least I will have peace of mind on the actual temperature. Although I have a feeling at some point in the future I will be replacing the circuit board in question since other gauges in the cluster will probably begin flaking out as well.

Posted on Sep 06, 2008

  • 3 Answers

SOURCE: 1989 Toyota Land Cruiser overheating- REPLACED ENTIRE COOLING SYS

Do a cylinder leak down test. Hook up a airline to each spark plug hole. Bring each cyclinder to tdc and listen for air leak. Possibly in the radiator. You can also reverse the process by doing a radiator leak down test. If you hear bubbling in the radiator bad head gasket. Remove and replace head gasket.

Posted on Jun 07, 2009

  • 634 Answers

SOURCE: Gauge reads Hot but truck doesn't appear to be overheating - help

is antifreeze dirty looking and if was changed was it chemically flushed?

Posted on Jul 06, 2009

  • 6982 Answers

SOURCE: Sunfire overheating, not low on coolant

Sensor on the engine sends info to the computer that triggers fan relay and sends power to fan. Most often problem is sensor or relay but quick check fan itself by hot wiring it to the battery Polarity is not an issue...if you get wrong it will run backwards. If it does not run, it's bad.

Posted on Jul 30, 2009

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are you referring to the engine temperature overheating or the cabin temp not cooling down with the aircon on? I am struggling to think of a reason why operating the aircon would affect engine temperature

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if engine over heating coolant over flow jug will boil over you will see steam.sound like you have either faulty engine coolant temperature sensor or could have faulty fans relay or fuse or pcm problem if coolant fans dont turn on.have garage with code scanner that can do a snap shot on coolant temperature sensor check see how hot coolant temperature is see if coolant temperature over 220 degrees engine getting too hot.could have faulty water or blowed head gasket check engine oil on oil dip stick look milkly you have blowed head gasket. i use infra red laser thermometor check see how hot engine is over 107 celsius engine is overheating.

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My car said "engine hot


Full coolant level does not mean your engine cannot overheat. You need to fix the problem as overheating will destroy the engine if not addressed.

The radiator cooling fans must be working, as must the water pump. The thermostat must also be working properly.
There must also be no air in the cooling system as air locks will impair water flow. When cooling systems are drained fully or partially and re-filled air in the system must be bled out using the correct bleeding procedure for the particular engine/cooling system. Failure to do this properly will lead to overheating.

If you ONLY see the overheating warning when running your aircon you need to check that the electric radaitor fans are kicking in at idle when you switch on and run the aircon and the engine has been warmed up some. If they do not start operating when the a/c is running you will get an overheating condition in normal driving conditions.

If the radiator fans are operating normally and you still get an overheating warning when the aircon is on or off the most likely culprit is a faulty thermostat in the engine's cooling system which will need to be replaced.

If you have either a faulty thermostat or if the water pump in the cooling system fails you will get continuous overheating whether the aircon is on or off.

Sep 05, 2011 | 2006 Chevrolet Impala

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My bakkie seems to over heat on hot days with the aircon on but when i switch aircon off she cools down. I have flusehd the radiator and the thermostat is working. It don't happen all the time only...


Check to see if you have an air conditioner fan which is usually fitted on the outer (grill) side of the radiator, make sure that works when you switch the air conditioner on when the temperature goes up.

Feb 18, 2011 | Mitsubishi Pickup Cars & Trucks

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The a/c on my 2003 honda accord will all of a sudden stop blowing cold air. I already had the filter changed thinking that was the problem. The mechanic is having a hard time figuring out what is wrong...


have you tried refilling the aircon gas ?

It goes empty after a while.

The reason for cold then not cold is because it is a system that works in reverse of your radiator.

The gas cycle through the system. goes through the radiator of the the aircon system (not the same as the one for the engine). there is extracts the heat out of the air. the air is now cold and pushed into the car.

the warm aircon gas the made cold further along the system but the dont have enough in the system.

imagine athletic ruynning around a track. all 20 are bunched up together. there is w spot light in the centre of the infield shining on you.

the track is your aircon system.
the spot light the air coming into your car.
You are the car
The athletes are the aircon gas.

When they run between you and the light the air is cooled off and you are getting cold air.
now of goes the air (athletes) around the system and till they come along again you get hot air.

Now fill up the aircon system (put more runner on the track and voila, less light reached you cos there is more gas in the system.

However if you refill it and after a day or even just a week it the same again you have a leak in your system and will need to have it looked at by someone specializing in car aircon repairs.

Oct 11, 2010 | 2003 Honda Accord

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My car overheat when im using the car aircon,it doest overheat when im not using the aircon,so how can i use the aircon with out overheating my engine,i already clean the radiator,condenser,check the...


The cooling fan should run continuously when the A/C is on. If it does then I suggest you drain and flush the cooling system, and replace the thermostat. Fill it with a fresh supply of a 50/50 mix of antifreeze and distilled water.

May 16, 2010 | 1999 Suzuki Vitara

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It really does overheat a lot when in traffic.


You need to check youe water pump, thermostat and your radiator cap and if all of that is good it sounds like a blown headgasket.

Mar 08, 2010 | 1990 Toyota Corolla

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No, It is not Meant to go Faster. This is caused by a Clogged Thermostat. Get this changed and it should be fine. Let me know if you need any more Help! Please Rate my Response, I need all the Help I can Get! Thanks!

Jan 26, 2009 | 1993 Toyota Camry V6

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Are you quite sure it is not overheating? Your mention of heavy traffic, ie. stop and go, would tell me that your radiator fans are not working. I had a car with bum electric radiator fans. It worked fine if it was moving a lot. But in slow traffic, it would get warm enough to have a vapor lock or something without setting the engine-hot light.

Nov 26, 2008 | 1999 Suzuki Vitara

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