In this video I give an update on resolving the persistent fault with my 2008 Smart Fortwo Passion 84 BHP 451. The car actually broke down in use and became too unreliable to drive.

The SAM unit (Signal Acquisition Module) was previously carefully dismantled and I discovered several failed solder joints on the circuit boards within the SAM unit which I re-soldered (re-flowed).

There is no water ingress to the vehicle which could harm/affect the TCM (Transmission Control Module and the carpet/area beneath is clean and dry.

I previously scanned the vehicle for trouble codes/fault codes and the below were found:

N15/6 Sprintshift control module (2 DTCs)
P1800 Implausible transmission data.
P2802 Signals from incremental sensor of component 'M17 (Gear motor)' are implausible.

N47-5 (ESP control unit) (1 DTC)
Fault in CAN communication with control module 'N15/6 (Sprint shift control module)'.

I checked the engine earth cable, battery, alternator output and wiring loom to clutch actuator and gear shifter motor. I found a short to ground and a wiring loom chaffed on a sharp area of bodywork under the carpet. The wire in question involved the yaw sensor.

Here are a series of shorts videos detailing the journey to fixing this problem:

   • 3 Lines Fault #shorts #car #smart #fo...  
   • 3Lines Update 2 #smart #fortwo #car #...  
   • 3Lines Update 3 #shorts #smart #fortw...  
   • Not the Loom! #shorts #smart #fortwo ...  
   • What next #shorts #smart #fortwo #451...  
   • Short to ground #shorts #smart #fortw...  
   • Check this too! #shorts #smart #fortw...  

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Disclaimer - Please be advised that my videos are not instructional and are merely footage of me, with many years of motor trade experience, carrying out vehicle repairs. Please conduct your own research, ensure you have the correct tools/necessary expertise and undertake your own due diligence before carrying out vehicle repairs. If in doubt, entrust an automotive technician.