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Homemade multifunction ignition timing-ABS code reader-injectors tester Thu Jan 31, 2013 7:06 pm
puntolimitecero
active member
Whit no sophisticated media, you can build by yourself a tester as useful as the original BMW one but much more cheaper.
You can make a simple and elementary one, that would be about this, that needs more wire and more and has two independent circuits, one of them fed with a 9 volt battery to test ignition and the other with no fed to read ABS codes, testing injectors signal,... all assembled into the same casing:
Other resource, a bit more sophisticated but more simple on shape would be this other. A transistor is used as a switch to light the led diode when Hall sensors or ABS signal is present, depending on switch status.
When switch is on, the circuit feds Hall sensor and receives signal from it when ignition point is reached. This signal polarizes the transistor, that connects the led diode to ground.
When switch is off, the circuit dont send fed out to anything, it only feds the positive pole of led. When ABS or injectors signal is received, transistor polarizes and the led iluminates.
Transistorized tester.
I have used an old tyre pressure tester case to hold in the circuit. I never throw away anything.
To complete the job and make it more professional, you can design some stickers with the operation explanation:
No transistor circuit
For the more simple version, we can recycle a DC charger capable of hold the two circuits:
You can use a original Hall sensors female harness to connect the tester with the harness on bike. Thus will made the operation easier.
Saludos
You can make a simple and elementary one, that would be about this, that needs more wire and more and has two independent circuits, one of them fed with a 9 volt battery to test ignition and the other with no fed to read ABS codes, testing injectors signal,... all assembled into the same casing:
Other resource, a bit more sophisticated but more simple on shape would be this other. A transistor is used as a switch to light the led diode when Hall sensors or ABS signal is present, depending on switch status.
When switch is on, the circuit feds Hall sensor and receives signal from it when ignition point is reached. This signal polarizes the transistor, that connects the led diode to ground.
When switch is off, the circuit dont send fed out to anything, it only feds the positive pole of led. When ABS or injectors signal is received, transistor polarizes and the led iluminates.
Transistorized tester.
I have used an old tyre pressure tester case to hold in the circuit. I never throw away anything.
To complete the job and make it more professional, you can design some stickers with the operation explanation:
No transistor circuit
For the more simple version, we can recycle a DC charger capable of hold the two circuits:
You can use a original Hall sensors female harness to connect the tester with the harness on bike. Thus will made the operation easier.
Saludos
Last edited by puntolimitecero on Tue May 06, 2014 6:17 pm; edited 1 time in total
1988 K100RS SE/ABS
