POSITION SENSOR DOUBLE WING (TPS2)
Location: throttle body Bosch Mono-Jetronic, Mono-Motronic, integral with the shaft of the butterfly. Best
test method: Although commonly used a multimeter to voltage function, the ideal is the use of two-channel oscilloscope.
measurement points: at the pins of the control unit from each of the two signals and the electronic mass.
When checking this sign? : When the engine fails to start (but has a pulse injection and ignition), excess consumption, to accelerate the engine stops, idle speed, poor acceleration, unstable idle, charred plugs, cutting and drawing. Waveform
correct:
The signal is the time of full throttle. There may be minor peaks corresponding to external interference such as ignition system, the same charge or electric fans.
Use the data table for the vehicle to be tested.
In any case there must be abrupt changes in throttle position voltage constant. To find fault with sporadic, hit the sensor slightly in different directions, move the electrical connectors and temperature externally if possible. Even air pressure around the sensor. Always with the engine running and that's where the fault occurs.
If no check signal in the sensor connection tab, if it mass and power 5. Check the integrity of the signal cable for short circuits or open circuit.
Note that it is important to the value at the position. If check does not match the position of the throttle adjusting screw has not been modified.
Alternative Methods of Testing:
With Scanner.
With multimeter dc voltage function. Manuel
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