Hummer 12614973 Sensor Assembly, Map

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The MAP sensor is placed on the top of the intake manifold close to the throttle body. It is specifically on top of the throttle body. It can be disconnected by unplugging electrical connector and removing bolts that hold an accelerator cable bracket from a throttle body, and pulling it off a throttle body. The negative battery terminal cables must be disconnected before you begin. Thereafter, disconnect MAP sensor connector. Then, remove accelerator cable bracket bolts and lift up the bracket. At last, take out MAP sensor from the throttle body. Installation is just the reverse order of this process for removal.

First, to remove the MAP sensor on V6 models, disconnect the electrical connector and pull the sensor from the intake manifold. Next, replace the sealing grommet if necessary, and use oil on the grommet during installation. For a V8 model, remove the intake manifold cover, disconnect the electrical connector, and remove the sensor.

To remove the 2.2L and 2.4L engines, start by turning the ignition key to the OFF position. Then, disconnect the MAP sensor electrical connector and remove the mounting bolt. The MAP sensor is located on the intake manifold, just behind the throttle body on 2.2L and 2.4L engines.

If any component fails these checks, replacement may be necessary.

Before checking the MAP sensor, you should check the terminals in the connector and the wires leading to the sensor for looseness and breaks. Repair them as required.

Start by turning the ignition key to the OFF position.

Insert a pair of small screwdrivers between each side of the MAP sensor and its mounting bracket and carefully pry the sensor loose.

If the test results are incorrect, you should replace the MAP sensor.

If the sealing grommet is damaged on a V8 model, it should be inspected and replaced if necessary. During installation, it is important to use clean engine oil on the grommet to ensure proper sealing. Additionally, make sure the retainer snaps into place during installation.

The general process for installing the MAP sensor on both models is the reverse of the removal process.

To remove the MAP sensor on a V8 model, you first need to remove the intake manifold cover. Then, disconnect the electrical connector before removing the sensor retainer. Finally, pull the sensor straight up to remove it.

Replace the MAP sensor seal in the upper intake manifold.

If the sealing grommet is damaged on a V8 model, it should be inspected and replaced if necessary.

The camshaft sensor and crankshaft sensor, depending on the engine type, should be checked for resistance and proper signal output.

The oxygen sensor in the exhaust monitors oxygen content. To check it, you can check its millivolt signal while the engine warms up. It is also important to inspect the oxygen sensor heater and ensure it receives proper voltage.

The camshaft sensor and crankshaft sensor, depending on the engine type, should be checked for resistance and proper signal output.