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Old 02-28-2008, 08:21 PM   #1
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Default BMW tps question

I have a 9093 MSPNP and its been modified by DIY to use a variable TPS.
I got this BMW TPS (0 280 120 406) I noticed there are 3 jacketed wires and the other 3 aren't. Does anybody have a wiring diagram that actually shows w/c wires are spliced onto the OEM harness. TIA
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Old 02-28-2008, 08:38 PM   #2
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http://tinyurl.com/2xkmnq

My money's on the black,brown,yellow trio. If it's anything like the 0280120402, then black is +5, brn is gnd, yellow is signal out. A multimeter will tell you for sure.
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Old 02-29-2008, 07:49 AM   #3
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Quote:
Originally Posted by mspnp manual
If you’re not sure which connection on your TPS goes to which wire, check it with an ohmmeter. Observe the resistance as the throttle opens and closes. Each pair of pins will behave differently:

The resistance between the 5 volt and ground pins will remain constant.

The resistance between the ground and signal pins will be low with the throttle closed and high with the throttle wide open.

The resistance between the 5 volt and signal pins will be high with the throttle closed and low with the throttle wide open.

Using these rules, you can establish which pin on the TPS goes to which wire.
Also, I posted the wiring schematic somewhere here about which pin is what. Just check continuity between the pins on the connector and the wire ends to determine what colors go to which pins
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Old 02-29-2008, 11:54 AM   #4
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the 3 shielded wires are definitely the signal lines based on the ohmmeter readings but what about the other 3, are they even used?
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Old 02-29-2008, 12:19 PM   #5
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