When the crankshaft place (CKP) sensor falls short on your 3.9L V6 evade Dakota the engine is not gonna" start because of a absence of spark.

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In this tutorial I"ll explain how to test the crankshaft place sensor on her 1997-2003 3.9L V6 evade Dakota and also 1998-1999 3.9L evade Durango.

By the way, the crankshaft place sensor test can be done v a an easy multimeter and also since this is an on-car test, girlfriend don"t have to remove it from her Dodge Dakota to check it.

NOTE: this tutorials compliment this one:

you can discover this accuse in Spanish here: Cómo Probar El Sensor De La Posición Del Cigüeñal (1997-2003 3.9L dodge Dakota) (at: autotecnico-online.com).

APPLIES TO: This tutorial uses to the complying with vehicles because they usage the precise same crankshaft position sensor:

3.9L dodge Dakota: 1997, 1998, 1999, 2000, 2001, 2002, 2003.3.9L evade Durango: 1998, 1999.

WIRING DIAGRAM: The following ignition system wiring diagrams might come in handy:

Symptoms that A negative Crankshaft position Sensor

For the most component crankshaft place sensor failures reason one of two problems: It"ll fail totally and the engine won"t start as result of a absence of spark.

Or it"ll failure intermittently. In this kind of crankshaft place sensor failure, the engine operation starts and runs fine many of the time. However every now and also then the engine doesn"t begin or if it"s running, the stalls (dies) without any apparent reason.

The many common type of crankshaft position sensor failure that I"ve had actually to diagnose is the one where the sensor fails totally and causes a no-start problem. I"m gonna" focus on this type of fail in this tutorial.

Although the fuel injection computer is draft to set a trouble password P0320: No Crank reference Signal in ~ PCM once the crankshaft place sensor fails, the doesn"t always do so.

Circuit explanation Of The Crankshaft place Sensor


The crank sensor is a Hall effect sensor and has 3 wires coming the end of its electrical connector. This way that one cable feeds it with power, one cable feeds that Ground, and also the other takes the CKP signal to the computer.

All three wires connect directly to your Dodge Dakota or Durango"s fuel injection computer.

The connector ~ above the sensor itself has male spade terminals. The connector ~ above the engine wiring harness has female terminals.

Below is a short description the the three wires that affix to the crankshaft position sensor:

1997-1999 Crankshaft place Sensor ConnectorPinWire ColorDescription
1Violet v white strip (VIO/WHT)Power (5 Volts DC)
2Black through light blue strip (BLK/LT BLU)Sensor Ground
3Gray with black stripe (GRY/BLK)CKP Signal
2000-2003 Crankshaft place Sensor ConnectorPinWire ColorDescription
1Orange (ORG)Power (5 Volts DC)
2Black through light blue strip (BLK/LT BLU)Sensor Ground
3Gray with black stripe (GRY/BLK)CKP Signal

Where come Buy The Crankshaft position Sensor

Checkout the following links and also comparison shop the crankshaft position sensor for her 1997-2003 3.9L V6 dodge Dakota:

NOTE: Not sure if the crankshaft place sensor fits your certain 3.9L dodge Dakota or Durango? Don"t worry. As soon as you acquire to the site, they"ll make sure it fits. If it doesn"t, they"ll find you the best one.

TEST 1: testing The Crankshaft position Signal

The crankshaft position sensor is draft to create an ON/OFF voltage pulse once the engine is turning.

ON is once the signal voltage is 5 Volts DC and also OFF is when the signal is 0 Volts DC.

The cool thing is that us can conveniently "see" this ON/OFF voltage signal through a multimeter that"s linked to the crankshaft place sensor"s signal wire.

Now once the crankshaft place sensor fails, it"s gonna" stay stuck creating a single voltage value as the engine turns.

To check the crankshaft place sensor with a multimeter, it"s vital to manually rotate the engine and also NOT use the starter motor! The starter engine will turn the engine as well fast and you won"t have the ability to see the ON/OFF voltage pulses.

One last thing before we start: The crankshaft position sensor is bolted to the infection bell housing. The camshaft position sensor is situated inside the distributor. The sensor we"re trial and error is the crankshaft place sensor that"s bolted to the infection bell housing.

IMPORTANT: The crankshaft place sensor must be connected to that is engine exploit connector because that this test to work. You"ll need to connect your multimeter test cause a back probe or a cable piercing probe to review the crank signal. You deserve to see an instance of a cable piercing probe here: Wire Piercing Probe evaluation (Power Probe PWPPPPP01).

NOTE: Don"t have actually a multimeter or must upgrade yours? examine out my recommendation: Buying A Digital Multimeter because that Automotive Diagnostic Testing.

These room the test steps:


Place your multimeter in Volts DC mode.


Disconnect the ignition coil from its electric connector. This is an important safety precaution!


With the red multimeter test lead, probe the gray through black strip (GRY/BLK) wire of the crank sensor connector.NOTE: The crankshaft position sensor should remain linked to its engine wiring exploit connector to have the ability to read that is signal.


Connect the black color multimeter check lead straight on the battery an adverse (-) terminal.


Turn the ignition an essential to the top top position and turn the engine by hand using the 1/2" ratchet wrench and also appropriate socket ~ above the crankshaft pulley.For the accuracy of the test, execute not use the starter motor.


Your multimeter will check out an ON/OFF voltage the 5 Volts and 0 Volts (if the crankshaft place sensor is functioning correctly).ON is once the multimeter reads 4-5 Volts DC and also OFF is when it reads 0 Volts DC.

Let"s examine your CKP signal test result:

CASE 1: The multimeter review the indicated ON/OFF DC voltage. This is the correct and also expected test result and speak you the the crankshaft position sensor is to work correctly.

Since the crankshaft position sensor IS not defective, something rather is bring about your 3.9L V6 Dakota or Durango to no start.

CASE 2: The multimeter did NOT check out the shown ON/OFF DC voltage. This test result usually means that the crankshaft position sensor is defective.

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Before you replace it, make sure it"s obtaining power and Ground. Because that the following test go to: check 2: Making sure The Crank Sensor has actually Power.