When I built the MSII about a year ago, there was an ocasional issue with the fuel pump light on the stim not illuminating. Now in the car, there is occasional issue with the fuel pump not running - at least it is consistent.
Best I can tell, the MS controller switches the fuel pump relay by taking the ground wire of the controll side of relay low.
Can anyone guide me to which components are part of the fuel pump control circuit? I will carefully check those solder connections and components. I suspect it is something there.
Otherwise the controller works.
Thanks
Mark
Fuel pump circuit
Forum rules
Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0).
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0).
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
Re: Fuel pump circuit
Hey all,
I found the circuit schematic after I posted. Sorry for the bother.
Also reviewed it with a couple of engeineer friends who understand such things. Learned a lot about the current and voltage protection that the transistors and zener diode provide. Now viewing transistors vs. FETs in a whole new light.
I also know where to look for solder and component issues.
Thanks
Mark
I found the circuit schematic after I posted. Sorry for the bother.
Also reviewed it with a couple of engeineer friends who understand such things. Learned a lot about the current and voltage protection that the transistors and zener diode provide. Now viewing transistors vs. FETs in a whole new light.
I also know where to look for solder and component issues.
Thanks
Mark