perfect aproach to rule out if tstat is the issue or wiring. Will also check the resistance. Will try that and update the thread.
Also this code p0599 seem generic from a obdII scanner. Do you think there would be specific hidden BMW error code totally different ? just a thought
Quote:
Originally Posted by andrewwynn
Since the error is specific to electrical fault (short high) first try to rule out wiring including disconnect connector If the internal sensor/heater shorted out giving the error the problem will migrate.
Example: you are getting a shorted high signal that should happen if the wiring has an insulation break and is shorted across two wires (hot and signal). If you unplug and still have the same error the short is in the wiring.
If you unplug the tstat and the error becomes "open signal to tstat" well the. You have your answer: short internal.
You can probably find online what Ω values the connector to the tstat should read. I don't even know how many wires it has or if it's a temp sensor or heater or both. I thought it was both .
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