The camshaft place sensor in your Altima"s distributor is the one that controls the ignition system and also if the goes bad, your Nissan Altima won"t start. Return it"s called a camshaft place sensor, it"s real duty is that of a crankshaft position sensor.

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As you might currently know, the camshaft position sensor is located inside the distributor assembly on her 1997, 1998, 1999, 2000, or 2001 2.4L Nissan Altima, and also this write-up will present you exactly how to test it with a multimeter in Volts DC mode because a straightforward resistance test of the camshaft position sensor does no exist.

You"re additionally not walking to require a scan device or any type of other high-quality diagnostic tool, just a multimeter and also a helper to crank the engine because that you.

girlfriend can discover this tutorial in Spanish here: Cómo Probar El Sensor De La Posición Del Árbol De Levas (1997-2001 2.4L Nissan Altima) (at: autotecnico-online.com).

Important Tips and Suggestions

TIP 1: The only way to effectively and also accurately check the camshaft position sensor, is by manually rotating the engine. You have to not crank the engine with the starter engine to perform this camshaft place sensor test.

TIP 2: You need to disable the fuel mechanism by disconnecting all 4 fuel injectors before starting the test.

TIP 3: It"s vital that girlfriend test because that spark first, before attempting the camshaft place sensor test. If you have spark comes from any kind of one the the 4 spark plug wires, climate you have the right to accurately assume the camshaft position sensor is OK.Here"s the link to the ignition coil test: 2.4L Nissan Ignition Coil check (97-01), i m sorry you have to do very first before testing the camshaft place sensor.

TIP 4: The camshaft position sensor is component of the strength transistor assembly and also is within the distributor. If the camshaft place sensor proves to it is in fried, you"ll have to replace the whole distributor, because it"s not sold separately.

How does The Camshaft position Sensor Work?

What"s gonna" aid you to watch the ‘why and how’ the the experimentation in this write-up is come understand how the strength transistor works. In a nutshell, this is what happens:

The camshaft position sensor is located inside the distributor and is component of the power transistor assembly.

The camshaft place sensor assembly is yes, really a crank sensor, since the fuel injection computer uses that to control the production of spark thru" the strength transistor and also ignition coil.

Now, as soon as you turn the key and crank the engine (to begin it), the camshaft place sensor/power transistor obtain power thru" the cable labeled through the number 5 (see photo over of the connector).

As the engine turns, the camshaft position sensor assembly starts to produce two certain position signals the it sends directly to the computer. One signal is dubbed the 1° POS Signal and also the various other is dubbed the 180° REF Signal

When the power transistor gets the Triggering signal native the fuel injection computer, it now starts to switch the ignition coil"s strength On and also Off. This ON/OFF activity is what provides the ignition coil spark and also is referred to as the convert Signal.

If any type of one the the 2 camshaft place sensor signals is missing, your Nissan Altima will crank however not start because of a absence of spark.

CAM SENSOR check 1: Making certain The Camshaft place Sensor Is acquiring Power

The first order of service is to check and verify the the camshaft place sensor is acquiring juice, in the form of 12 Volts.

The wire that delivers this 12 Volts to the distributor is the wire labeled through the number 5 in the picture above.

Alright, these space the check steps:

CASE 1: The multimeter registered 10 come 12 Volts. This is the correct test result and confirms that the camshaft place sensor is acquiring power.

The following step is to check that the camshaft place sensor is developing its two position signals. Walk to: camer SENSOR check 2: check The 1° POS Signal.

CASE 2: The multimeter DID no register 10 come 12 Volts. This tells you the the reason of her Nissan Altima"s no start is because of this absent voltage, due to the fact that without this voltage, the distributor is no gonna" work.

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Although it"s past the border of this write-up to troubleshoot this lacking voltage, detect the cause of these missing 12 Volts will resolve you no-spark no-start problem on her 2.4L Nissan Altima.