Simply order the right radiator cap, and replace it.ĭo note that a problematic radiator cap can also cause your coolant reservoir to dry up.Īlways check if the radiator cap is properly closedĢ. If you continue driving with a damaged radiator cap, you’ll suffer some overheating problems eventually. The cooling system of a car needs pressure to circulate the coolant. Apart from that, sometimes a damaged radiator cap cannot hold pressure. Here are three:ġ.Worn-out radiator cap – A worn-out radiator cap allows minute amounts of coolant to escape as you are driving. So why does this happen? Losing coolant, but no leaks: Three reasons why this happensĬoolant loss with no leaks can stem from several possible reasons. Sometimes, you’ll find that you do not have coolant leaks at all, but the levels of the said fluid are always low. In some cases, though, the leak isn’t as apparent. When that happens, it might spell disaster for your car as it is crucial in staving off the accumulation of residual heat from the combustion process.Ĭoolant spills are a mess, but losing coolant without without visible leaks is a pain too This of course is especially true with coolant. Sometimes though, these fluids can escape their rightful containers. It needs oil to lubricate the engine’s moving parts, hydraulic fluid to actuate the clutch and brake, among others. It is easy to get incorrect recollection or understanding of a circuit, codes, etc., if you don't refer to reliable resources, such as the attachments.It is a given that cars need several types of fluids in order to operate correctly. There IS a Check Control ID Code: CC-ID 166, as shown in the attached screenprint from "Warning Lamps & CC-ID" pdf. There IS such a code for Low Oil Level > 1 Liter. If that is the case, and BOTH of you have changed the switch MULTIPLE times, then the problem would certainly appear to be:ġ) in the X112 Connector at the Switch, or the Brown/White wire between X112/2 and X14271/54 Ģ) a faulty chassis ground (Brown/Black wire) orĪFAIK, there is NO DTC or Fault Code related to Low Coolant. In other words, either open circuit or short depending upon intermittent conditions.īOTH OP & DonMc IMPLY that the warning light comes on even when Coolant Level in Reservoir is normal, as opposed to a slow coolant leak. So I would test continuity of the Brown/White wire, and also test for "Short-to-ground".ī) In DonMc's case, since the problem is intermittent, with normal operation for several weeks, it would appear there is either a loose or corroded connection, or intermittent short. What is NOT clear from the diagrams is whether NO ground (open circuit in the Brown/White wire) causes Warning Light, or whether "Short-to-Ground" causes the warning light. If you're NOT sure how to test the wiring between the switch (S63b) and the JB Connector/Pin (x14271/54) let us know and we can suggest how to test for continuity and short-to-ground, (1) open circuit or (2) short.Ī) If you look at the circuit, ALL the switch does is complete a ground from chassis ground point X1108 in the Driver Footwell, via Pin#2 of Connector X112 at the Coolant Level Switch, to Pin#54 of Connector X14271 at the JBE Module (below the JB Fuse Panel). ISTA wiring diagram, Component Locations & Connector View are attached. "DonMc", if you will provide the Last-7 Characters of your VIN, I will check ISTA to see if your wiring is same as 2009 N54. Click to expand.If the definition of "Insanity" is doing the SAME thing and expecting a Different Result - WELL.
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