5/2/2024 0 Comments Engine coolant light![]() In that time, I have seen FCMs fail at maybe 20% of the rate the fan motor fails. ![]() I can say this, in eight years on this forum, I have seen many fan motors fail. This engine coolant light turns another color you mightve noticed, and that color is red This light indicates that (you guessed it) your engine is too hot If. Of course, if the power feeding the FCM is not reliable, that would cause the FCM to possibly not send the pulses back under load as well. I strongly suspect that your problem is a bad fan motor. (If the engine is cold, but you turn the A/C on, the ECM sends pulses long enough to make the fan run slowly.) The FCM still replies to every pulse with a pulse.ģ) If the FCM is bad, it won't send the pulses (not the case in your situation as you said the light goes out with the A/C off).Ĥ) If the FCM tells the fan to run, but it senses the motor is not flowing as much current as expected, or TOO MUCH, then it fails to send the pulses to the ECM and the ECM lights the light. If the ECM does not see the pulse come back, it assumes the FCM is in trouble and lights the Coolant light.Ģ) If the ECM wants the fan to run, it sends pulses that are longer than in 1) above, the longer the pulse, the faster the FCM will turn the fan. Whey you turn the key to "ON", the ECM and FCM both power up.ġ) The ECM sends pulses to the FCM, if the pulse is short, the FCM just sends a pulse back. You may end up swapping, but the way to do this is to understand the operation of the Fan Module (FCM), and it is a very simple concept. any way to test the fan module or is it case doing a swap and a see if that works. ![]() I suppose I will start by replacing the coolant sensor. I suspected the IC pump, but the SRT runs full power. I have in the past also experienced the heat intermittently coming on with the A/C running full cool at the controls which would indicate an issue with the heat core solenoids, or its associated circuitry. I have seen it go out and come back on without rolling the temp controls. The light seems to go out if I roll both temp controls to the heat side past detent. Engine temp is normal, coolant level is good. 5.1 Understanding The Connection Between 5.2 Taking Immediate Action To Prevent Engine Damage 5. I am having the same problem with an intermittent low coolant indicator light on the rescue SRT. 4.1 Locating The Source Of The Coolant Leak: 4.2 Temporary Fixes To Keep Your Car Running: 4.3 Professional Repairs For Coolant System Leaks: 5 Overheating And The Coolant Light.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |