Absolute pressure sensor ¬ of the intake manifold (engine without the air flow meter)

Absolute pressure sensor ¬ of the intake manifold (engine without the air flow meter)
With the built-sen ¬ matrix element absolute pressure sensor in the intake manifold receives the manifold pressure and converts it into voltage. Based on these data, the electronic control unit determines the duration of opening valves and injector and ignition timing. The sensor measures the pressure in the intake manifold ¬ rated is not about al-atmospheric pressure and relative ¬ but a perfect vacuum, and thereforenot affected by fluctuations in atmospheric pressure at sea level altitude and other factors, and provides re ¬ gulirovanie of the fuel-air mixture in all conditions.
Scheme of the sensor and its circuit connected ¬ radiation. 1 - sensor absolute-pressure in the intake manifold,
2 - electronic control unit,
3 - the measuring chamber, 4 - filter, 5 - electric output, 6 - from the intake manifold.
Check absolute pressure sensor in the intake manifold
1. Check the supply voltage absolute pressure sensor in the intake manifold.
a) Disconnect the sensor connector.
b) Turn the ignition key.
a) (In 5A-PE (AE110), 4A-FE (AT190 and AE101), 7A-FE) Using a voltmeter, measure voltage between sensor connector "USS" and "E2".
Rated voltage 4 - 6
(5A-PE (AE110), 4A-FE (AE101, AT190, AE111), 7A-FE) Using a voltmeter, measure the voltage between the sensor connector, "CS" and "E2".
Rated voltage .... 4.5 - 5.5
2. Check the output transducer ¬ ka absolute pressure.
a) Turn the ignition ..
b) Disconnect vacuum hose from the intake manifold.
a) Connect a voltmeter to the conclusion ¬ ladies "R1M" and "E2" connector electron ¬ Nogo control unit and measure the voltage output at atmospheric pressure.
d) stepwise brings rarefaction tion to the sensor in the range of 13.3 kPa (100 mmHg) to 66.7 kPa (500 mmHg).
e) Measure the decrease in the value of the voltage for each value of time-saving.
Vacuum. kPa (mm Hg) decrease stress. In
13.3 (100) 0.3 - 0.5
26.7 (200 0.7 - 0.9
40.0 (300) 1.1 - 1.3
53.3 (400) 1.5 - 1.7
66.7 (500) 1.9 - 2.1

Variable resistor (engines without air flow and / or catalytic converter ¬ Skogen)
Resistor designed to regulate ¬ renormalization of the fuel mixture and composition of the mixture at idle (the mixture screw). By turning the adjustment screw clockwise contacts inside the resistor increases and shifts the voltage at terminal "UAR". The electron ¬ ny control unit increased somewhat ¬ creases the amount of injected top ¬ Liva, enriching the fuel mixture.
Diagram of the variable re ¬ zistora. 1 - a variable resistor, 2 - electronic control unit.
1. Check the supply voltage of variable resistor.
Disconnect the AC plug rubber-story, turn the ignition on and voltmet ¬ rum measure the voltage between the conclusions ¬ DAMI electronic control unit "USS" (or "CSS") and "E2" (or "E21"). Rated voltage: 4A-FE (AE92, AE95, AT171, AT180)
and 4A-OE (AE92, AT160) 4 - 6
4A-FE (AE101, AT190, AE111), 7A-FE (AE115) 4.5 - 5.5
2. Check the output signal re ¬ alternating resistance.
a) Connect the resistor and switch on the ignition. Slowly rotate the adjustment screw re ¬ alternating resistor (screw the "quality" of the mixture) at first counter-clockwise until it stops, and then complete Stu ¬ clockwise, measure the voltage with a voltmeter. contacts between the electronic control unit "UAR" and "E2".
b) Ensure that the voltage of post ¬ gradually varies in the range 0 - 5 V.
4A-FE (AE111), 7A-FE (AE115).
Please note: there should be no abrupt changes in voltage ¬ different to 5 or a sudden it drop to 0. 3. Check the resistance of the re ¬ alternating resistance.
a) Disconnect the AC ¬ th resistor.
b) Measure the resistance with an ohmmeter ¬ tion between the findings of "USS" (or "CSS") and "E2" (or - "E21") connector ne ¬ belt resistor.
Rated
Impedance 4 - 6 ohms
4A-FE (AE111), 7A-FE (AE115), 5A-FE (AE110).
a) Fully turn the regulation screw vochny resistor (screw the "quality") counter-clockwise.
g) Connect the ohmmeter to terminals of the variable resistor connector "UAR" and "E2".
4A-FE (AE92, AE95) 4A-CE.
Turn the engine is fully rubber-transistor in a clockwise direction and convincing re-quest that the resistance varies from about 5 ohms to 0.
Switch start banning (for models with automatic transmission) (4A-FE (DE111), 5A-FE (LE110), 7L-PE (LE115))
The switch is triggered when the prohibition start switching cross-lecturer of automatic transmission in "P" or "Y" This conclusion Y5M electron control unit closed to ground through the starter relay and the voltage at pin mapping ¬ Y5M to 0. When you move the selector to the position of the torus ¬ "t", "2", "1_", "P" you start banning klyuchatel ¬ ¬ cluded from the voltage at terminal "Y5M" becomes equal to the voltage ¬ NIJ battery. When you move the selector on the position of the "Y" to "E" signal from the switch run the ban is used for correction of the fuel-air mixture in the control ¬ examination of the frequency of rotation of idling.
1. Check the switch ¬ Prohibition of the launch.
Disconnect the switch and start banning check the presence of ¬ conductivity between the terminals at each position of the selector automatic.
The position of the selector Conclusions
P 1.6 3.2
P 5-6 -
N 2-3 6-7
E 6-8 -
1_ 2 6-9 -
4-6 -

Knock Sensor
5A-FE (AE110) and 4A-FE (AE111, vari-ant with an electronically controlled automatic transmission and a catalyst for the AE101 and A190), 7A-FE (AE115) 1. Disconnect the sensor and using a suitable key weighted ¬ filamentary sensor.
If the ohmmeter registers any resistance other than infinity (less than 1 MW), then replace the sensor.
3. Check with an oscilloscope.
a) When the rotation frequency of 4000 rev / min, check the waveform between the terminal "KYK" electronic control module and ground. The correct form of the signal are shown in the top graph.
b) zoom on the horizontal axis, and make sure that the oscillation period is 0.123 sec. (The normal frequency of vibration of dates ¬ chica detonation is 8.1 kHz).
4. Install the knock sensor, used by using the appropriate key.
Torque. 44 nm
5. Connect the sensor de ¬ tonatsii.