Hyundai Palisade (LX2): Engine Control System / Manifold Absolute Pressure Sensor (MAPS)
Description and operation
Manifold Absolute Pressure Sensor (MAPS) is a speed-density type sensor installed
on the surge tank. It senses absolute pressure of the surge tank and transfers
the analog signal proportional to the pressure to the ECM.
By using this signal, the ECM calculates the intake air quantity and engine
speed.
The MAPS consists of a piezo-electric element and a hybrid IC amplifying the
element output signal. The element is made of silicon diaphragm, which has the
pressure sensitive variable resistor effect of semi-conductor.
Because one side of the silicon diaphragm is 100% vacuum and the other is affected
by the manifold pressure, this sensor can output analog signal by using the
silicon variation proportional to pressure change.
Specifications
Pressure (kPa)
|
Output Voltage (V)
[Vref = 5V]
|
20.0
|
0.79
|
46.66
|
1.84
|
101.32
|
4.0
|
Schematic diagrams
Harness Connector
Repair procedures
| 1. |
Connect the diagnostic tool on the Data Link Connector (DLC).
|
| 2. |
Measure the output voltage of the MAPS during idle with IG ON.
Pressure (kPa)
|
Output Voltage (V)
[Vref = 5V]
|
20.0
|
0.79
|
46.66
|
1.84
|
101.32
|
4.0
|
|
| 1. |
Switch "OFF" the ignition and disconnect the negative (-) battery terminal.
|
| 2. |
Disconnect the vacumm hose (A).
|
| 3. |
Disconnect the manifold absolute pressure sensor connector (B).
|
| 4. |
Remove the sensor after loosening the mounting bolt.
|
Manifold Absolute Pressure Sensor (MAPS) mounting bolt :
9.8 - 11.8 N.m (1.0 - 1.2 kgf.m, 7.2 - 8.7 lb-ft)
|
|
| • |
Install the component to the specified torque.
|
| • |
Note that internal damage may occur if the component is dropped.
In this case, inspect the component before installation.
|
|
| • |
Insert the sensor in the installation hole and be careful not
to damage it during installation.
|
|
| 1. |
Install in the reverse order of removal.
|
Description and operation
Description
Mounted inside the Manifold Absolute Pressure Sensor, Intake Air Temperature
Sensor (IATS) detects the intake air temperature.
Description and operation
Description
Located in the engine coolant passage of the cylinder head, Engine Coolant Temperature
Sensor (ECTS) detects the engine coolant temperature.
Other information:
Description and operation
Description
The photo sensor is located at the center of the defrost nozzles.
The photo sensor contains a photovoltaic (sensitive to sunlight) diode. The
solar radiation received by its light receiving portion, generates an electromotive
force in proportion to the amount of radiation received wh
Specifications
Specifications
[BCW, BCA]
Items
Blind-Spot Collision Warning (BCW)
Blind-Spot Collision- Avoidance Assist (BCA)
Rated voltage
DC 12V
Operating voltage
9V - 16V
Operating speed
30 km/h
