Technical Specification of Intake Pressure Sensor
Operational Temperature
：
—40
／
+125
O
C
4) Reason for General Failure:
1
、
There is abnormal high voltage or reverse big electric current in the course of working.
2
、
The vacuum component is damaged in the course of maintaining.
Maintenance Notice
：
1
、
It is prohibited to use high voltage gas to impact the vacuum component while maintaining.
2
、
Attention on whether output pressure and electricity is normal when replacing sensor after finding
failure.
3
、
Do not damage the O seal ring.
Brief Measure Method
：
Temperature Sensor Part
：
(Discharge the tie-in) Make the digital multimeter on the ohm gear, and the two
meter pen
meet the stitch of sensor 1# and 2# separately, and rating resistance at 20
o
C is 2.5k
Ω
土
5
％
. The
simulation method can also be adopted while measuring, the detail process is: blow the wind to the sensor by
electric drier (Note: Do not keep them too close with each other)
,
observe the change of the sensor resistance, and
this time the resistance value will drop.
Pressure Sensor Part
：
Make the digital multimeter on the direct current voltage gear, the black meter pen
earths, and the red meter pen connects with No 3# & 4# separately. The referring voltage on the 3# stitch should
be 5v and the voltage on the 4# stitch should be 1.3v while at idle speed (the exact value is related to the vehicle
model.); open the throttle slowly while with zero load, the voltage on the pliers stitch will not change a lot, then
open the throttle quickly and the voltage on the 4# stitch will immediately reach to 4v and then fall to 1.5v.
2
．
Throttle Position Sensor
1) Brief Chart & Stitch
Stitch: The form when the air throttle opens anticlockwise: No 1 earth, No 2 connected to power supply 5v,
and No 3 outputs the signal.
The form when the air throttle opens clockwise: No 1 connects power supply 5v, No 2 earth, and No 3
outputs the signal.
2) Working Principle
This sensor has the linear output angle sensor, which is made up of two arc slide resistances and two slide
arms. The revolve shaft of slide arm is connect with the throttle axle in the same axes. Both ends of slide
resistance will connect with 5V electrical source. When the throttle valve rotate, the slide arm will turning along
with it and move on the slide resistance meanwhile, and educe the UP at the contact point as output voltage,
therefore, it works as corner potentionmeter, and a voltage signal by the proportion of protentionmeter output and
throttle position.
3
）
Technical Specification
