![]() Ive been driving it for about 2 weeks now and same thing every time. I checked the level and filled it to the full level and it still does this. After about 1 minute or so and a mile or less of driving it goes off and stays off. If coolant level was low, and light was not "ON, " or owners complaint was "light never comes "ON" with low coolant, " replace sensor. The coolant like comes on with I first start the engine. The coolant level sensor shares a common sensor ground (CKT 452) with the EGR, map and coolant temperature sensor, an intermittent at any of these connections could cause the coolant level light to come "ON". If customer complaint was "light never comes "ON", this test will determine if it is ECM or bulb check circuit related. Allow the engine to cool down: Once you have pulled over, give your engine some time to cool down. But check the battery, there could be a bad. What could be the cause of the cause, please Answer: The fan coming on with the engine off is normal in modern vehicles. Continuing to drive with an overheating engine can lead to severe damage. Question: On my 2008 Toyota Highlander, the cooling fan comes up for about a minute and then goes off (mostly at night) without the engine being on and often runs the battery down. This confirms that the sensor ground CKT 452 is open between the ECM and coolant level sensor.ģ. Pull over safely: As soon as you notice the coolant warning light, find a safe place to pull over and turn off your engine. First make sure the coolant is a proper 50/50 blend with distilled water, and then top it off all the way to the top of the resouviour bottle, up to the black cap. Your sensor is malfunctioning, not floating unless he coolant is warm. By jumpering CKT 69 to ground, this will pull the ECM signal low and turn out the coolant light. The coolant sensor is a floater in the bottle. This test confirms that the ECM is controlling the coolant level light. They should be repaired first because they share common grounds.Ģ. This test will confirm if the coolant light is "ON" because of low coolant, and if Codes 14, 26, or 32 are "ON". TEST DESCRIPTION: Numbers below refer to circled numbers on the diagnostic chart.ġ. When the coolant level is low, the signal at the ECM will be high (4-5 volts) and the ECM will turn "ON" the low coolant light. ![]() When the coolant is at the proper level, the coolant level signal at the ECM is pulled low (0-3 volts). It is located at the right hand radiator tank, and senses coolant by means of two probes that protrude into the coolant. The Coolant Level Sensor is a solid state module that monitors coolant level. ![]() That is why it goes out when you added coolant. No, all that the sensor does is look at the level in the surge tank.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |