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How to test crankshaft sensor

What should the resistance be between the tow terminals on the crankshaft sensor

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Hi Ron, Connect the two cables to an analogue voltage test meter. Turn on the mili voltage scale and then pass something metal across the business end without touching it. and a slight movement should be recorded as a small voltage is generated. If nothing happens the unit is defective. Regards John

Posted on Oct 20, 2013

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2000 dodge 1500 sudenly died won't start back. Got fuel pressure but it sparks then don't then sparks then don't

Intermittent ignition is usually caused by a weak crankshaft position sensor signal. Check for proper installation and inspect wiring and connector. Turn the key on and check the voltage on the third terminal. This should be 5 volts dc. Also check the other terminals as stated below.

On the 2.5L engine, the Crankshaft Position (CMK) sensor is located near the outer edge of the flywheel (or starter ring gear). On other models it is fitted to the right side of the engine block.
The only test you can perform without a DRBII scan tool, or equivalent, is a basic check of the sensor only.
  1. Disconnect the sensor harness connector from the main wire harness connector.
  2. Place an ohmmeter across terminals 1 and 2 (see the illustration). The meter reading should be open (infinite resistance). If a low resistance is read, replace the camshaft position sensor.


Aug 25, 2017 | Dodge Cars & Trucks

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Have a '98 Chrysler Cirrus. Drove it home shut it off. Next morning would not start. No check engine light. No codes detected. Would turn over but not fire. One friend looked at it checked for spark at...

Try that rebooting, though I've never heard of that, I have doubts that it makes any difference, but try it anyway.
Most likely, the intermittent loss of the sensor is a wiring problem, like wires chaffed or partially burnt or broken. You know, like wires routed too close to exhaust or something like that. It would be a pain, but if you could test the wires with an ohmmeter to see if they are still good, it may help.

Remove negative battery terminal. unplug sensor connector and connector at the pcm. Use ohmmeter and test resistance of the two or three wires from sensor to pcm. While ohmmeter is connected, wiggle the wiring along it's path to detect any breaks. The resistance reading on a good wire will be very low, like under 1 ohm. Also check elec. connectors for loose pins or corrosion.

Mar 04, 2017 | Chrysler Cirrus Cars & Trucks

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My 92 explorer has no spark

Hi, here are some tests you can do to diagnose the problem. Please let me know if you have questions.

First, use a voltmeter or 12 volt test light to check for power on the red wire going to pin 8 of the ignition control module when the key is on. The module is in the left front corner of the engine compartment.


If there is no power, the problem is the ignition switch or EEC relay. If there is power, next, check the ignition coil as listed below.

IGNITION COIL TESTINGPrimary and Secondary Circuit Tests
  1. Turn the ignition switch OFF , disconnect the battery, then detach the wiring harness connector from the ignition coil to be tested.
  2. Check for dirt, corrosion or damage on the terminals.

  1. Use an ohmmeter to measure the resistance between the following terminals on the ignition coil, and note the resistance:

Except 2.3L, 2.5L and 5.0L engines

B+ to Coil 1 B+ to Coil 2 B+ to Coil 3
The resistance between all of these terminals should have been between 0.3-1.0 ohms. If the resistance was more or less than this value, the coil should be replaced with a new one.



Fig. Fig. 1: Engine ignition coil harness connections-3.0L and 4.0L engines

  1. Measure, using the ohmmeter, and note the resistance between each corresponding coil terminal and the two spark plug wire towers on the ignition coil. The coil terminals and plug wires towers are grouped as follows:
Except 2.3L, 2.5L and 5.0L engines

Terminal 3 (coil 1)-spark plugs 1 and 5 Terminal 2 (coil 3)-spark plugs 2 and 6 Terminal 1 (coil 2)-spark plugs 3 and 4

If the coils test good, move on the the crankshaft sensor.
Using a DVOM set to the DC scale to monitor less than 5 volts, measure the voltage between the sensor Cylinder Identification (CID) terminal and ground by backprobing the sensor connector. If the connector cannot be backprobed, fabricate or purchase a test harness. The sensor is okay if the voltage reading varies more than 0.1 volt with the engine running at varying RPM. (check both the blue and gray wires at the ignition module with the engine cranking.)


Fig. Fig. 3: CKP sensor wire harness connections for the 4.0L (VIN X and E) engines

If there is power and both the coils and sensor check good, replace the ignition control module.

Oct 27, 2011 | Cars & Trucks

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The car is a 4cl 1993 no spark.changed coil and igniter

  • Test the Camshaft Sensor
  • Check voltage between the camshaft position sensor terminals. With engine running, voltage should be greater than 0.1 volt AC and vary with engine speed.

  • Check the Crankshaft Position Sensor.
  • Using an ohmmeter, measure the resistance between terminals. Resistance cold should read 1630-2740 ohms and hot; 2060-3225 ohms.


  • Could also be a timing belt issue.

  • Make sure the distributor is spinning (rotor)

  • If you have any comments please feel free to leave them here.
  • Hope this helps and thank you for using FixYa.

Regards, Tony

Oct 13, 2011 | 1993 Toyota Camry V6

1 Answer

I was driving down the road in my 2001 sonata, and it just died on me and can not get it started, all the fues are good in fues box, i founded out that it did not have spark. now would that be a coil...

Hi, it can be either of those or possibly a shorted condense or a bad crank sensor. First, I would check for battery voltage at the positive terminals of the coil when the key is on. If no voltage there, try disconnecting the condenser. If there is voltage, then check for AC voltage across the coil terminals while cranking the engine. If there is no AC voltage, the problem may be the crankshaft position sensor. The crankshaft position sensor is located next to the flywheel/torque converter. The computer is rarely the problem unless there was a short that caused undue current to flow.


Testing Crankshaft Position Sensor
2.4L Engine
  1. Disconnect the sensor electrical connector. Connect an ohmmeter.
  2. Measure the resistance between terminals 2 and 3, on the crankshaft position side of the connector. Specification should be 0.486-0.594 kohm at 68 degrees F.
  3. If measured value is not within specification, replace the sensor.

  1. Be sure that the CKPS and PCM connectors are connected.
  2. Engine ON and monitor the signal waveform of the sensor on the scan tool. Check whether the waveform is synchronized with the crankshaft position sensor or not.
  3. If the waveform signal is normal, substitute with a known good PCM and check for proper operation. If the problem is corrected replace the PCM.
  4. If the waveform signal is not normal, substitute with a known good CMPS sensor and check for proper operation. If the problem is corrected replace the CMPS.

2.5L Engines
  1. Disconnect the sensor electrical connector. Connect an ohmmeter.
  2. Measure the resistance between terminals 2 and 3, on the crankshaft position side of the connector. Specification should be 0.486-0.594 kohm at 68 degrees F.
  3. If measured value is not within specification, replace the sensor.

Sep 16, 2011 | 2001 Hyundai Sonata

1 Answer

Where is the location of crankshaft sensor in VW passat,1995,2,8?

The crankshaft position sensor detects gaps in the sensor ring corresponding to TDC of each cylinder. The sensor uses a permanent magnet, core and coil. The changing gap causes the magnetic field near the sensor to change. This in turn varies the voltage signal to the ECM. The ECM uses the signals for ignition timing and fuel synchronization.
Audi A4 2.8L
  1. Disconnect the electrical harness connector.
  2. Switch the DMM to its resistance range and connect it between the CKP sensor connector terminals 1 and 2 , using jumper wires from VW 1594 test kit. The DMM should show approximately 1,000 ohms.
  3. If the specified value is not obtained, replace the crankshaft position sensor.
  4. If the specified value is obtained, connect the DMM between terminal 1 and 3 (GND), then between terminals 2 and 3 (GND). The DMM should show infinite ohms (open).
  5. If the specified value is not obtained, replace the crankshaft position sensor.
  6. If the specified value is obtained, check the wiring for continuity or short between crankshaft position sensor and ECM, using a wiring diagram.
  7. Connect a VAG 1598/19 test box to the ECM harness connector.
  8. Check the CKP sensor shielding for continuity by connecting a DMM between terminal 3 and engine ground (GND). The DMM should show a maximum of 1 ohm.
  9. Check the wiring for continuity between the CKP sensor connector terminal 1 and the test box socket A9 , then between the CKP sensor connector terminal 2 and test box socket A10 . There should be a maximum of 1 ohm.
  10. If the specified values are not obtained, check and eliminate any short or open circuits in the wiring.
  11. If the wiring is OK, replace ECM.

Passat 2.8L
  1. Disconnect the harness connector from the crankshaft position sensor.
  2. Switch the DMM to its ohms range.
  3. Connect the DMM to terminals 1 and 2 of CKP sensor harness, using adaptor leads from VW 1594 adaptor kit.
  4. Resistance between terminals 1 and 2 must be 500-700 ohms.
  5. Connect the DMM to terminals 1 and 2 , then 1 and 3 of the CKP sensor harness, using adaptor leads from VW 1594 adaptor kit.
  6. The resistance must be infinite ohms.

  1. Disconnect the electrical connector from the sensor.
  2. Remove the crankshaft sensor retaining bolt and remove the sensor.
  3. Replace the O-ring and lightly lubricate it with clean engine oil.
Installation is reverse of removal.

To remove the sensor:

  • Disconnect the wiring harness.
  • Unbolt the sensor mounting bolt.
If the crankshaft timing sensor or the camshaft reference sensor is removed, follow this procedure when the sensor is replaced:
  • Thoroughly clean the sensor tip and install a new spacer on the sensor tip. New sensors should be supplied with the spacer installed.

Spacer on crankshaft timing sensor and camshaft position sensor.

  • Install the sensor until the spacer lightly touches the sensor ring, and tighten the sensor mounting bolt 105
Look for the sensor on the axis of the crankshaft near either end of the engine.

Good luck on locating this sensor.

Jan 17, 2011 | Volkswagen Passat Cars & Trucks

1 Answer

95 4cyl camry intermittant spark loss thus engine dies and fails to crank for short period, sometimes can be coaxed to crank again after removing negative battery terminal for several minutes and...

Test the crankshatt position sensor. If it tests good, please get back to us.

OPERATION The Crankshaft Position (CKP) sensor provides a signal through the ignition module which the ECM uses as a reference to calculate rpm and crankshaft position.

TESTING The crankshaft sensor should be tested either cold 14-122°F (-10-50°C) or hot at 122-212°F (50-100°C).
  1. Using an ohmmeter, measure the resistance between terminals. Resistance cold should read 1630-2740 ohms and hot; 2060-3225 ohms.
  2. If resistance is not within specification, the sensor may be faulty.

Fig. Fig. 1: The crankshaft position sensor is located to the right of the water pump-1MZ-FE engine
  1. Disconnect the negative battery cable.
  2. Remove the right hand engine under cover.
  3. Remove the right side fender apron seal.
  4. Remove the sensor wiring retaining nuts.
  5. Remove the bolt and disconnect the crankshaft position sensor wiring, then withdraw the sensor.
To install:
  1. Install the sensor and secure with the bolt to 69 inch lbs. (8 Nm).
  2. Attach the engine wiring.
  3. Install the right hand fender apron seal.
  4. Install the right hand engine under cover.
  5. Connect the negative battery cable.
  6. Reset any electrical components such as the radio or clock.


Jul 02, 2017 | 1995 Toyota Camry

1 Answer

I got the code p1361 on my HONDA, PRELUDE, 2000. Its mean TDC intermittent connection.... On h22a4 like me... the TDC and CKP connect in 1 connector. I check the connector restistance.... perfect... i...

heres adiagram to check resistance of the sensor, it should be1200-1300 ohms, but take note the sensor could read good at this time this problem is intermitent and the sensor may be bad, check for continuty at the computer connector , if all wires are good then i would replace the crankshaft sensor/top dead sensor (CKP/TDC).next check conntinuty between sensor terminals and ground check all four prongs on sensor if theres continuity on any one replace sensor, next key off and sensor connected . remove the pcm 31 pin connector (C) here a diagram of it. at the pcm connector measure resistance between terminals C2 and C12 it should be 1200-3200 ohms, then check between C3 and C13, again 1200-3200ohms if the ohms are off then check wires that fail omh test is with connector again test connector c2 (blue /white wire) to ground and C3 to ground if continuity exists then repair wire that fails between connector and sensor, if all tests are good then try a good pcm. i dont think its pcm, i think if its not a wire then replace sensor , but good luck and i hope this helps.johnjohn2_18.gifjohnjohn2_19.gif

Nov 11, 2010 | 1998 Honda Prelude

1 Answer

My car got FS engine. it cranks but no spark on plugs.replaced another distributor still got same is on connector.

  1. Disconnect the crankshaft position sensor wire harness plug.
  2. Connect an ohmmeter to the sensor terminals A and B and measure the resistance. Fig. 1: Crankshaft position sensor connector terminals. Measure the resistance across the A and B terminals 89544g27.gif
    Fig. 2: Measure the air gap between the crankshaft position sensor and the crankshaft pulley 89544g28.gif

  3. The reading should be 520–580 ohms at 68°F (20°C).
  4. If not as specified, replace the sensor.
  5. Measure the air gap of the sensor between the crankshaft pulley and the sensor.
  6. Proper air gap should be 0.040–0.080 in. (1–2 mm).
  7. If not as specified, inspect the crankshaft pulley and/or replace the sensor.
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Aug 02, 2010 | 1993 Mazda 626

1 Answer

The car will crank but does not have fire going to the coil pack

did you do a spark test?
This could be a number of things, your crankshaft sensor, coils or ignition module.
check the coils
  1. Remove the ignition coil(s).
  2. Using an ohmmeter, check the resistance between the primary terminals on the underside of the coil. The resistance should be 0.50-0.90 ohms.
  3. Check the resistance between the secondary terminals. It should be 5,000-10,000 ohms.
  4. If the coil failed either test, replace the coil.

Jul 25, 2009 | 1995 Chevrolet Cavalier

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