MembersPage/PeterJensen/AudiStrigger (2007-09-02 20:05:15)

Corrado g60 turbo

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VW Passat

[Start] [Elektronic throttel]

Audi S2

[Start] [Questions ] [ Injector] [Ignition] [Triger] [Display] [Wbo2] [Config] [Table] [Wiring] [Idle] [Tools]

Trigger tester tests

  • Leaving the sj7 open then i have 0-4 V to the processor. Removed the lm 1815 and still ok signal
So the sec. trigger maybe in bad condition??
  • if you purchased bare board, and assembled yourself, this part was not tested with the mintest. So it is even possible there is a short somewhere on the PCB traces
  • if you have problems to find the short, while the board is powered, you can use a 0.5 .. +5V strong supply (100mA or higher) to inject current into the short, and measure with DVM mV mode to locate the short. Don't use +12V (or anything higher than 5V), that would kill components. Be careful. If you have max +0.7V supply, or limit with a resistor and diode, you can do the measurements with the board unpowered.

trigger_test.jpg

Measurements with exchange crank home trigger

trigger_135_ref.JPG

Measurements with exchange crank home trigger

trigger_135_ref_1.jpg


Added a 20K resistor (12..15k is better, sometimes 20k is too high)

trigger_1.jpg

Soldered JP7

trigger_2.jpg

Mounting the stepper chip

trigger_3.jpg

C103 replace with 1nF (only needed on certain boards from a given old batch, 2005 or so)

trigger_4.jpg

added 1uF cap in parallel with C40

trigger_5.jpg

R182 shorted

trigger_6.jpg

Made wire for the crankhome-VR trigger input (EC18 pin 12)

trigger_7.jpg

Connected JP 2 and JP 7 so the primary trigger goes where it needs to:

trigger_8.jpg