Hyundai Veloster: Manifold Absolute Pressure Sensor (MAPS). Description and Operation
Description
Manifold Absolute Pressure Sensor (MAPS) is a speed-density type sensor
and is 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 silicon diaphragm type and adapts
pressure sensitive variable resistor effect of semi-conductor. Because 100%
vacuum and the manifold pressure apply to both sides of the sensor respectively,
this sensor can output analog signal by using the silicon variation proportional
to pressure change.

Inspection
Throttle Position Sensor (TPS)
1.
Connect the GDS on the Data Link Connector (DLC).
2.
Start the engine and measure the output ...
Specification
Pressure
[kPa (kgf/cm², psi)]
Output Voltage (V)
20.0 (0.20, 2.9)
0.79
46.7 (0.47, 6.77)
1.84
...
See also:
Front Impact Sensor (FIS). Description and Operation
Description
The front impact sensor (FIS) is installed in the front side member. They
are remote sensors that detect acceleration due to a collision at its mounting
location. The primary pur ...
Fuel Tank Pressure Sensor (FTPS). Description and Operation
Description
Fuel Tank Pressure Sensor (FTPS) is a component of the evaporative emission
control system and is installed on the fuel tank, the fuel pump, or the canister.
It checks the purge ...
Repair procedures
Replacement
Problems And Replacement Parts:
Problem
Part set
Scan tool required?
All keys have been lost
Blank key (4)
YES
...