All about Marelli 2 and 3 bar MAP sensors - PassionFord - Ford Focus, Escort & RS Forum Discussion



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All about Marelli 2 and 3 bar MAP sensors

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Old 21-07-2004, 11:24 AM   #1
foreigneRS
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Default All about Marelli 2 and 3 bar MAP sensors

APS 02/03 - 05/01

Air pressure sensors, 2.0 /3.0 bar absolute

The APS xx series devices are high-accuracy and reliability analogue absolute pressure sensors.
Each pressure sensor exploits the piezo-resistive properties of silicon devices. The sensing element is a Wheatstone bridge located on a mechanically shaped silicon chip. A thick film hybrid circuit for signal amplifying is included in the same package. The same circuitry provides thermal compensation and noise reduction.
These active devices are housed in hermetically sealed plastic protective casings.

Technical data

Mechanical Characteristics

Dimensions (maximum) 77,5x65.0x41.0 mm
Nozzle diameter. 4.7 mm
Weight 88.0 g
Connector Mini-Timer 3 way

Performance Pressure range:

APS 02/03 17 to +216 kPa
APS 05/01 17 to +308 kPa
Operating temperature range -30 to +110°C
Response time less than 7 ms

Over pressure

02/03 200 %
05/01 450 kPa

Electrical Characteristics

Power supply 5.00 Vdc ±0.5
Output (min pressure) (at 5 Vdc supply) 0.25 V
Output (Full scale) (at 5 Vdc supply) 4.75 V
Protection Short circuit

APS05 Sensor output In mV (15.46 mV / kPa)

308 kPa = 4750 mV
162.5 kPa = 2500 mV
17 kPa = 250 mV



APS02 Sensor output In mV (22.61 mV / kPa)

216 kPa = 4750 mV
116.5 kPa = 2500 mV
17 kPa = 250 mV

Connector Pin Out

Important wiring note:

The connections A,B & C are identified as 1,2 & 3 on many commercially available minitimer connectors and may also be numerically reversed.

Looking towards the sensor so that the nipple is facing you, and the single mounting hole is at the top, the connector has 2 locating 'blocks' at the top,
(one at each end of the connector) and a single one in the middle at the bottom. Pin A (or 1) is on the Left, Pin B (2) in the centre, and Pin C (3) on the right.

PIN description

A + 5 Vdc
B GND
C Signal OUT

Also see:

https://passionford.com/forum/viewtopic.php?t=30245
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Old 21-07-2004, 11:28 AM   #2
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For additional information,

1 kPa = 1,000 Pa
100,000 Pa = 1 bar

1 kPa = 0.01 Bar
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Old 13-09-2004, 03:12 PM   #3
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for Bosch 5 bar sensors, the pin layout is as follows:

A GND
B + 5 Vdc
C Signal OUT

i.e. the ground and supply are swapped around compared to the Marelli MAP sensors.
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Old 02-09-2015, 08:43 PM   #4
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Hi Nick

I know this is an old post but could you help me with a chart for a 3 bar sensor(APS05)

I've tried to calculate it my self from the (15.46mV/kPa) but it seams to be different depending on which end of the scale I try to calulate it from

-0.5 Bar----------Volts?
0.0Bar----------Volts?
+0.5Bar----------Volts?
+1.0Bar----------Volts?
+1.5Bar----------Volts?
+2.0Bar----------Volts?

Many thanks Tim
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