BMW Repair Questions? Ask a Mechanic for Answers ASAP
ok, thanks for the first one, what about the second one?
I just replaced my themostat and I still get the same error, what do you think is still wrong?
140 Output Thermostat Map cooling
After I installed the thermostat and bleed the coolant I reset it all. Then I went for a drive and checked when I got back. I recieved the code then. I then reset it and went for another drive, when I got back I checked it again and it came back. Nothing on the dash, I receive the code using INPA and DIS. Any suggestions on what I can check next? I can also plug and grab another reading if you think the numbers in teh details will help.....
The details might help, how many times has it occurred? Have you checked again after clearing the faults. Maybe it isn't clearing the fault memory in the DME just a guess. Have you tried to clear them with a generic scanner? Maybe you can go for two or three drive cycles to see if the check engine light will come on? I am thinking maybe it needs to run a test on it to verify correct operation. I can say I haven't reread the faults after a repair so I don't think this is normal but I also haven't experienced it before either.
I ran the car a couple times to tthe store and cleared before each trip. This is what I got back from INPA and DIS.
E R R 0 R MEMORYDate: 03/02/13 18:30:19ECU: 11E72KWP1JobStatus: OKAYUariant: ME72KWP1RESULT: 1 errors in error memory !140 Output Thermostat 11ap coolingError frequency : 2Logistic counter: 40Error occured 1. times at:Engine speedEngine temperatureIntake air temperatureSupply uoltageError occured 2. times at:Engine speedEngine temperatureIntake air temperatureSupply uoltageError currently auailableError testedREPORT600.0090.0048.7513.75600.0090.0048.7513.47/minGrd CGrd Cu/minGrd CGrd Cu
Error testedSignal-/Path discontinuity current,Signal-/Path discontinuity Initial,Fault sporadic
and in DIS:
Contents of defect code memories(not selectable or deletable)DME - SC DME: Activation, map coolingINSTRUMENT- BD IKE: Electronic braking-force distributionAccepted symptoms
I would check the connector to make sure it fully seated on the thermostat. And check the pins. If that all looks ok I would check for voltage at the connector which should always be there and the DME controls the ground for the circuit and switches it on via ground.
Here is some info on it, maybe it will help.
Functional Description See: Powertrain Management\Description and Operation\Engine Management (DME Motor Electronics ME7.2)\Digital Motor Electronics\Sensors\Characteristic Map, CoolingDescription and Operation ENGINE THERMOSTAT
There are two types of thermostats in BMW cars, the mechanical type, arid the type that is electrically heated. Both are designed to bring the temperature of the coolant up to operating temperature quickly.When the engine is cold, the thermostat is closed; in the closed position, it sends coolant from the engine back to the engine, through a bypass; as a result, the coolant temperature rises quickly. As the coolant reaches the rated temperature, the thermostat gradually opens, to allow coolant to flow from the engine to the radiator.ELECTRONICALLY HEATED THERMOSTAT
The heated thermostat is both a conventionally functioning and ECM controlled thermostat (two stage operation).ECM control causes the thermostat to open sooner than the mechanical thermostat rating. This provides sufficient cooling for full load and high output conditions.CONVENTIONAL FUNCTION The thermostat begins to open at 103°C . This is at the inlet side of the water pump and represents the temperature of the coolant entering the engine.Before the 103°C temperature is realized, the coolant is circulated through the engine block by the water pump.
After the temperature reaches 103°C it is maintained as the inlet temperature by the thermostat. The coolant temperature at the water pump engine outlet is approximately 110°C . The additional 7°C is achieved after the coolant has circulated through the block.The operating temperature of the engine will remain within this range as long as the engine is at part load conditions.ECM CONTROLLED FUNCTION
The map controlled heater in the thermostat will switch ON under the following conditions:
When the heating element is switched ON, the thermostat is heated higher than the temperature of the coolant.The thermostat opens sooner causing additional coolant to circulate through the radiator which brings the temperature down.The temperature of the coolant at the inlet side of the water pump will drop to approximately 85°C and the temperature at the outlet side of the water pump will drop to approximately 103°C .NOTE: