Question about 2006 Suzuki Grand Vitara
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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Posted on Jan 02, 2017
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.
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Posted on Aug 19, 2008
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
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
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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