Well that didn't take long. I noticed my CSL flap stopped functioning, which is about a year and a half later and few thousand miles of driving.
I removed the flap motor and applied 12V. Functions perfectly, even with a load. Switched the leads and its spins perfectly in the opposite direction.
The plastic gear train and flap all move freely without the motor attached.
I then complimented myself on having a spare DME for emissions that I proceeded to swap into the vehicle. Flap still didn't work. So I said aha! its either wiring or the position sensor (TPS). Until it dawned on me that spare DME is just a regular one with AlphaN, and has no added flap control chips. You fckin... 🙄
So either 1) wiring, 2) TPS or 3) CSL DME chip issue. Anything else I'm missing?
Old posts across different sites point to TPS as culprit. That would be disappointing as it seem barely used (I bought the whole flap unit brand new).
Can I test the TPS as a regular potentiometer with a multimeter? I'm not swapping throttle TPS or the like as I don't mess with recalibration, etc.
Lastly, I did notice that upon reinstalling the motor, which can result in the flap being partially open, that upon vehicle startup the flap moved perfectly back to its fully-closed position.
I removed the flap motor and applied 12V. Functions perfectly, even with a load. Switched the leads and its spins perfectly in the opposite direction.
The plastic gear train and flap all move freely without the motor attached.
I then complimented myself on having a spare DME for emissions that I proceeded to swap into the vehicle. Flap still didn't work. So I said aha! its either wiring or the position sensor (TPS). Until it dawned on me that spare DME is just a regular one with AlphaN, and has no added flap control chips. You fckin... 🙄
So either 1) wiring, 2) TPS or 3) CSL DME chip issue. Anything else I'm missing?
Old posts across different sites point to TPS as culprit. That would be disappointing as it seem barely used (I bought the whole flap unit brand new).
Can I test the TPS as a regular potentiometer with a multimeter? I'm not swapping throttle TPS or the like as I don't mess with recalibration, etc.
Lastly, I did notice that upon reinstalling the motor, which can result in the flap being partially open, that upon vehicle startup the flap moved perfectly back to its fully-closed position.
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