TEST 1: Verifying The Crank Sensor Is Getting Power

How To Test The Crankshaft Position Sensor (1994-2004 2.4L V6 Mitsubishi Galant)

We're gonna' start by making sure that the crankshaft position sensor is getting power. This power comes from the MFI Relay and is in the form of 12 Volts DC.

If power is present, then the next step will be to make sure the crank sensor is being fed with Ground (TEST 2).

NOTE: Avoid probing the front of the crank sensor engine wiring harness connector with your multimeter's test lead or you run the risk of damaging the terminal. I recommend that you use a back probe or a wiring piercing probe to check for power.

Here are the test steps:

  1. 1

    Place your multimeter in Volts DC mode and disconnect the crankshaft position sensor from the engine wiring harness connector.

    IMPORTANT: This test is done on the engine wiring harness crank sensor connector and NOT on the sensor's connector. You can further identify the engine wiring harness connector by the fact that it has female terminals.

  2. 2

    Connect the red multimeter test lead to RED wire of the crank sensor's engine wiring harness connector using an appropriate tool.

    The RED wire connects to the terminal labeled with the #3 in the illustration above.

  3. 3

    Ground the black multimeter test lead to a good Ground point on the engine or directly on the battery's negative terminal.

  4. 4

    Have your assistant turn the key to the On position but without cranking the engine.

  5. 5

    Your multimeter should register 12 Volts if the RED wire is feeding the crankshaft position sensor with power.

Let's interpret your test results:

CASE 1: If the multimeter showed 10 to 12 Volts. This is the correct test result and lets you know that the CKP sensor is getting power.

The next step is to make sure its Ground circuit is OK too, go to: TEST 2: Verifying The Crank Sensor Is Getting Ground.

CASE 2: If the multimeter DID NOT show 10 to 12 Volts. This indicates that the CKP sensor is not getting power. Without 10 to 12 Volts, the CKP will not work and your Mitsubishi vehicle will ‘crank but not start’.

Although it's beyond the scope of this tutorial, your next step is to find out why this voltage is missing and restore it to solve your Galant's no start condition.

TEST 2: Verifying The Crank Sensor Is Getting Ground

How To Test The Crankshaft Position Sensor (1994-2004 2.4L V6 Mitsubishi Galant)

If you've reached this point, you've confirmed that the crankshaft position sensor is getting power in TEST 1. Now, we need to make sure that the PCM is feeding the crank sensor with Ground.

This Ground is fed by the wire that connects to the crank sensor engine harness connector labeled with the #1 in the illustration above.

NOTE: Avoid probing the front of the crank sensor engine wiring harness connector with your multimeter's test lead or you run the risk of damaging the terminal. I recommend that you use a back probe or a wiring piercing probe to check for Ground.

This is what you need to do:

  1. 1

    Place your multimeter in Volts DC mode and unplug the crank sensor from the engine wiring harness connector.

    IMPORTANT: This test is done on the engine wiring harness crank sensor connector and NOT on the sensor's connector. Recall that the engine wiring harness crank sensor connector has female terminals.

  2. 2

    Connect the black multimeter test lead to the BLK wire of the crank sensor connector. This is the wire that connects to the female terminal identified with the number 1 in the illustration above.

  3. 3

    Connect the RED lead directly on the battery's positive terminal.

  4. 4

    Your multimeter should register 10 to 12 Volts with or without the Key in the On position (if the BLK wire is feeding the crank sensor with Ground).

Let's interpret your test results:

CASE 1: If the multimeter showed 10 to 12 Volts: Then all is good in this circuit and the CKP sensor is getting Ground.

The next step is check that the crank sensor is creating a crankshaft position signal, go to: TEST 3: Verifying The Crank Sensor Is Creating A Crankshaft Position Signal.

CASE 2: If the multimeter DID NOT show 10 to 12 Volts. This indicates that the CKP sensor doesn't have a good path to Ground. Without a path to Ground, the CKP will not work and your Mitsubishi Galant will ‘crank but not start’.

Altho' it's beyond the scope of this tutorial, your next step is to find out why this Ground is missing and restore it. Repairing the cause of this missing Ground should solve your vehicle's no start problem.

Mitsubishi Vehicles:

  • Galant 2.4L
    • 1995,
      1996,
      1997,
      1998