If it DOES, your Switch is NOT the issue. Most likely area or wiring issue is at the connector.Īlternatively, you could drive with the Connector X112 DIS-connected, as long as you are SURE you have normal coolant level and no leaks, and see if warning light intermittently lights. The Coolant Level Switch is difficult to get to, at the Bottom-Rear of the reservoir, and protected from Exhaust Manifold heat by a shield, so use care (perhaps removal of shield - 3 nuts) in removing. Presumably NO warning light is "At Rest" or Normal position. Note that the three switches shown in schematic (coolant level, washer fluid level, and Handbrake) are ALL shown in "Open Contacts" position. The above is based solely on interpretation of the TIS wiring diagram, and the "convention" that switches are shown in "at rest" or usual positions. You could test the wiring by disconnecting the connector and noting if the Warning Light comes on when: (a) the wiring harness is gently manipulated or moved, (b) the two sockets of the connector are "bridged" or connected with a test wire, or (c) light flashes when harness moved with sockets bridged, ALL with Ignition ON so JBE Function is Active to process the Ground signal. Here are the Installation Location and Connector View for that Connector, X112: That means EITHER:ġ) the switch is intermittently connecting the BROWN/BLACK ground wire, connected to Chassis Ground Point X1108, to the Brown/White wire, ORĢ) there is a wiring fault in the Brown/White wire between the Reservoir Connector (X112) and the JBE (under the glovebox) ANY false ground in that Brown/White wire between the Switch and the JBE will cause the light to come on.įrom your description, it appears that YOU/Your shop have determined that the ACTUAL coolant level in the Reservoir is NOT an issue. The way it is SUPPOSED to work is to provide a Ground Signal to Pin #54 of Connector X14271 at the JBE (Junction Box Electronics) Module IF the coolant level is low, and THAT ground signal causes the Warning Light on the Instrument Cluster to come on. You have a Coolant Level SWITCH (NOT Sensor -) in the Coolant Reservoir. It stays on and within 4-6 seconds, it disappears. So yeah, I guess my popsicles are safe!ĭidn't have time to remove the bumper, will do it these days and will report.For the last 2-3 months, the coolant light on the dashboard has surfaced intermittently. It stays on the tray and its water and odorant evaporate so what actually drips is concentrated washing product (more greasy) without odorant. My explanation: there's a slow leak of wiper fluid from the headlamp washer. The wiper fluid, however, has some odorant in it which I can't detect in the dripping fluid. My suspicion now is that it's actually not coolant but wiper fluid - it's also blue and slightly greasy to the touch (not as much as the liquid that's dripping though). The traces of liquid that I mentioned in the OP are not on the shield but on a tray under the duct. I was topping up a completely empty tank each time after the system repressurised, I’m sure it took another few litres of coolant at least. I could also not detect any loss of coolant. Coolant light then came on numerous times I guess due to the system pressurising and sucking the coolant into the gap created by the large air lock. There is simply no way whatsoever for coolant leaking from anywhere (engine block/head/gasket, water pump, coolant pipe, hoses, thermostat, connections, expansion tank, etc.) to get to the point where it's dripping from without leaving traces on the shield or splashes somewhere at the engine bay. No trace of a leak on the lower protection shield. Checked all hoses and connection points - completely dry. Had a bit more time after work and had a look. Below I take a really close look to it these days (removal of the shield under the engine) I would like to ask you:Ģ) Does anyone know of any usual suspects (so far my attention is drawn mainly towards the radiator drain plug) No significant loss of coolant detected, drove the car for an hour - no sign of overheating, everything runs fine. There was a bit (maybe an ounce or two) of the same liquid on the left side of the protection shield under the engine bay. No coolant leak/splashes visible from any system under the bonnet. Bluish, clear, greasy (not as much as oil, of course) and sweet (tasted it carefully). Took a drop that was hanging at the lower part of the bumper and examined it. Two weeks ago I noticed a wet spot on the ground under the extreme left (driver's) side of the front bumper, just below the left air-duct. To keep the long story short, got divorced, moved to a new place so my roadster spends lots of time under a car-cover now.
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