Тема: E28
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Старый 16.11.2016, 17:32   #3
Duat
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Hi Pin, thanks for the quick response.

Over the next couple of days I will do a photo series for the TPS disassembly, and do some measurements.

Have attached an illustration of the throttle body with the TPS setup.

17 is the TPS, 16 is the actuating arm and 22 is the idle position switch. 22 mounts at the two slotted holes on the mounting plate, on the inside of the plate. The TPS mounts on the outside of the plate. The actuating arm slides onto the throttle shaft on the inside side of the mounting plate and it protrudes through the mounting plate, piloting into the TPS. The two slots on the end of the bore of the actuating arm engage the two teeth in the TPS. The throttle shaft has a machined flat that engages a flat in the bore of the actuating arm. The actuating arm also operates the idle position switch.

The mounting bolt bolt pattern for the TPS is the same as early Ford and GM two-bolt mounting of the TPS.

Voltages........

Vref 5.0V
Vmin 0.7V
Vmax 4.77V

BMW note in their troubleshooting sheets that Vmax must be at least 0.22V below Vref.

Also, Vmax is used to caculate, via the auto trans ECU, wide open throttle position for the DME!
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