Hyundai i-30: Engine Control System / Manifold Absolute Pressure Sensor (MAPS)
Description and operation
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.

Specifications
Pressure [kPa (kg/cm², psi)]
|
Output Voltage (V)
|
10 (0.10, 1.45)
|
0.5
|
40 (0.41, 5.80)
|
0.913
|
80 (0.82, 11.60)
|
1.465
|
120 (1.22, 17.40)
|
2.017
|
160 (1.63, 23.21)
|
2.569
|
200 (2.04, 29.01)
|
3.12
|
220 (2.24, 31.91)
|
3.396
|
240 (2.45, 34.81)
|
3.672
|
280 (2.86, 40.61)
|
4.224
|
300 (3.06, 43.51)
|
4.5
|
Troubleshooting

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 at idle and IG ON.
Condition
|
Output Voltage (V)
|
IG ON
|
3.9 - 4.1
|
Idle
|
0.8 1.6
|
|
1. |
Turn the ignition switch OFF and disconnect the battery negative (-)
cable.
|
2. |
Disconnect the manifold absolute pressure sensor connector (A).
|
3. |
Remove the installation bolt (B), and then remove the sensor from the
surge tank.
Tightening Torque :
9.8 - 11.8 N.m (1.0 - 1.2 kgf.m, 7.2 - 8.7 lb-ft)
|

|
•
|
Install the component with the specified torques.
|
•
|
Note that internal damage may occur when the component is dropped.
If the component has been dropped, inspect before installing.
|
|
•
|
Insert the sensor in the installation hole and be careful not
to damage.
|
|
1. |
Install in the reverse order of removal.
|
Description and operation
Description
The Electronic Throttle Control (ETC) System consists of a throttle body with
an integrated control motor and throttle position sensor (TPS)...
Description and operation
Description
Intake Air Temperature Sensor (IATS) is included inside Manifold Absolute Pressure
Sensor and detects the intake air temperature...
Other information:
Inside the fuse/relay box covers, you
can find the fuse/relay label describing
fuse/relay names and ratings.
Information
Not all fuse panel descriptions in this
manual may be applicable to your
vehicle. It is accurate at the time of
printing...
Removal
[Manual Transaxle Type]
1.
Remove the manual transaxle assembly.
(Refer to Manual Transaxle System - "Manual Transaxle")
2.
Loosen the bolts and then removing the concentric slave cylinder (A)...
Categories
Opening the bonnet

1. Park the vehicle and set the parking
brake.
2. Pull the release lever to unlatch
the bonnet. The bonnet should
pop open slightly.

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