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Map sensor trying to figure out exactly where this goes?

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the (MAP) sensor is one of (ECU) engine control unit sensors
it was determine the engine manifold pressure and send it as electrical signal to the (ECU) to calculate the air volume & fuel injection to the engine


Posted on Jul 05, 2008


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On my 2003 nissan altima trying to figure out were the MAP sensor located.Can you help me plze?

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94 camry died and won't start we have spark, fuel and compression and a code 31, changed the map sensor still no start

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1 Answer

Can not find where the map sensor goes

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1 Answer

Where is the map sensor located on a 1.9 litre vw jetta?

For exact location and replacing procedure of VW jetta MAP sensor,click the link below and follow the details with diagrams:-----Where is MAP Sensor Located on VW Jetta
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Nov 25, 2012 | Cars & Trucks

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Map sensor

Manifold Absolute Pressure Sensor



See Figures 1, 2 and 3

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Fig. Fig. 1: MAP sensor location-2.4L engine

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Fig. Fig. 2: MAP sensor location-3.0L engine

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Fig. Fig. 3: MAP sensor location-3.3L and 3.8L engines
The PCM supplies 5 volts of direct current to the Manifold Absolute Pressure (MAP) sensor. The MAP sensor then converts the intake manifold pressure into voltage. The PCM monitors the MAP sensor output voltage. As vacuum increases, the MAP sensor voltage decreases proportionately. Also, as vacuum decreases, the MAP sensor voltage increases proportionally.
With the ignition key ON , before the engine is started, the PCM determines atmospheric air pressure from the MAP sensor voltage. While the engine operates, the PCM figures out intake manifold pressure from the MAP sensor voltage. Based on the MAP sensor voltage and inputs from other sensors, the PCM adjusts spark advance and the air/fuel ratio. The MAP sensor is mounted to the intake manifold, near the throttle body inlet to the manifold. The sensor connects electrically to the PCM.


See Figures 4, 5, 6 and 7

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Fig. Fig. 4: Disengage the MAP sensor connector-3.0L engine shown

WARNING When testing the MAP sensor, make sure the harness wires do not become damaged by the test meter probes.

  1. Visually check the connector, making sure it is attached properly and that all of the terminals are straight, tight and free of corrosion.

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Fig. Fig. 5: MAP sensor connector terminal identifications: (A) 5-volt supply, (B) sensor signal, (C) ground-3.0L engine shown

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Fig. Fig. 6: MAP sensor connector terminal identifications-2.4L, 3.3L and 3.8L engines

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Fig. Fig. 7: Using a digital volt-ohmmeter, test the MAP sensor voltage-3.0L engine shown

  1. Test the MAP sensor output voltage at the sensor connector between terminals B and C (2.4L, 3.3L and 3.8L engines), or A nd B (3.0L engine).
  2. With the ignition switch ON and the engine not running, the output voltage should be 4-5 volts. The voltage should fall to 1.5-2.1 volts with a hot, neutral idle speed condition. If OK, go to the next step. If not OK, go to Step 5.
  3. Test the PCM terminal 36 for the same voltage described in the previous step to make sure the wire harness is OK. Repair as necessary.
  4. Test the MAP sensor ground circuit at the sensor connector terminal A (2.4L, 3.3L and 3.8L engines) or C (3.0L engine) and PCM terminal 43. If OK, go to the next step. If not OK, repair as necessary.
  5. Test the MAP sensor supply voltage between the sensor connector terminals A and B (2.4L, 3.3L and 3.8L engines) r A and C (3.0L engine) with the ignition key in the ON position. The voltage should be about 4.5-5.5 volts.
  6. There should also be 4.5-5.5 volts at terminal 61 of the PCM. If OK, replace the MAP sensor.
  7. If not, repair or replace the wire harness as required.


See Figures 1, 2, 3 and 4
The MAP sensor is mounted on the intake manifold near the throttle body inlet to the manifold.

  1. Disconnect the negative battery cable.
  2. On the 3.0L engine only, disconnect the vacuum hose from the MAP sensor.
  3. Detach the electrical connector from the MAP sensor.
  4. Unfasten the mounting screws, then remove the MAP sensor from the vehicle.

To install:
  1. Install the sensor onto the intake manifold and tighten the mounting screws to 35 inch lbs. (4 Nm).
  2. Attach the sensor electrical connector.
  3. On the 3.0L engine, connect the vacuum hose to the MAP sensor.
  4. Connect the negative battery cable.

Jul 21, 2012 | 1997 Plymouth Voyager

2 Answers

Im trying to change the map sensor but I need help to know where it exactly located?

check the hose a fat like 3" or more tube that is attached to the cover of your air filter its just before the air filter. (I think, thats where it is on my 2000 eldorado northstar)

Jul 16, 2011 | 2004 Chevrolet TrailBlazer

2 Answers

I have 2 pending codes for a 99' pontiac grand prix gt. p0107 map/baro ckt low input.. & p0113 iat sensor 1 ckt high. i need to figure out what these 2 problems come from & what problems will they...

Try unplugging and plugging the map sensor, this device should have manifold pressure hooked up to it, via hose, so check for cracks or leaks. Then clear codes and test again.

Sep 25, 2009 | 1999 Pontiac Grand Prix

1 Answer

Not a 99 but an 04 wiring diagram for map sensor

All wires on the sensor go to the computer, one will be a standard power wire going to the sensor, and the other 2/3 will be resisted signals going from the sensor to the computer

Jul 20, 2008 | 1999 Honda Odyssey

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