tachometer does not move?

2007 TOYOTA CAMRY
228,000 MILES • 2.4L • 4 CYL • 2WD • AUTOMATIC
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JOE1953
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why the tachometer don't move when cranking? what all the cause could be?
Sep 3, 2025 at 2:45 AM
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STRAILER
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Does it move once the engine has started? If so this is normal.
Sep 3, 2025 at 9:42 AM
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JOE1953
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the engine wants to start crank but no start and no spark.
Sep 3, 2025 at 10:25 AM
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STRAILER
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It sounds like the crankshaft sensor has gone bad, here is its location so you can change it out. Check out the images (below). Please let us know what happens.

Sep 3, 2025 at 1:29 PM
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JOE1953
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the reason the tachometer wasn't moving when cranking I forgot to hook the connected backup at the crank sensor. so the tachometer will move now when cranking. so you say the crank sensor bad? how do I check for signal at the crank sensor and the coils from the computer?
Sep 3, 2025 at 6:43 PM
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STRAILER
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The best way is to check for the pulse signal at the coil, here is a guide to help:

https://www.2carpros.com/articles/how-to-test-an-ignition-system

Please go over this guide and get back to us.
Sep 4, 2025 at 10:09 AM
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JOE1953
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I don't know which wire to connect my voltmeter to the coils have 4 wires connected to it. which one is positive wire and trigger signal wire? hope to find the problem soon.
Sep 4, 2025 at 11:37 AM
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STRAILER
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There is two wires and a shield wire, use the red and green wires
Sep 4, 2025 at 6:05 PM
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JOE1953
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the color wires I see is:
1. light green
2. white-blue/stripe
3. yellow-black/stripe
4. tan
can you send me a color wiring diagram on the coils? the color on some of theses are fade.
Sep 5, 2025 at 5:20 AM
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STRAILER
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There are only two wires to the sensor, put your volt meter on millivolts and crank the engine over, you should see a pulse.
Sep 5, 2025 at 5:57 PM
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JOE1953
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I use my sensor tester to test the crankshaft position sensor. on my tester it have 4 or 5 red lights on it so when I connect it to the sensor and crank the engine the lights on my tester suppose to blink when cranking but it didn't so I'm not getting a pulse from the crankshaft position sensor.I also check for a pulse at the camshaft sensor with my tester I got a pulse from the cam sensor the lights on my tester was blinking so I belive the crankshaft sensor is bad.
Sep 7, 2025 at 8:56 PM
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STRAILER
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Yep, good job testing it Joe, let me know after toy replace it if it solved the problem.
Sep 8, 2025 at 11:03 AM
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JOE1953
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how do I replace the crankshaft position sensor what all I have to remove out of the way?
Sep 8, 2025 at 12:05 PM (Merged)
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STRAILER
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Check out the instructions above.
Sep 8, 2025 at 12:06 PM
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JOE1953
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I took the old crankshaft sensor out and bench test it by connected my sensor tester to it and used a flathead screwdriver and went up and down in front of the part where the magnet is I use the screwdriver as a reluctance wheel and the red lights was blinking on my sensor tester so that mean my old sensor is good and I bought a new sensor and I tested it the same way and lights blinking on my sensor tester so I have't replace the new sensor yet because I believe my old one is good I need a wiring digram for the Ignition coils color wires so I can check for pulse at the coils I don't want to connect to the wrong wire. do the wires connector run to the PCM? I did check for volts at the 4 connector wires at the coil 2 of them had about 5 volts. hope to find the problem soon.
Sep 10, 2025 at 8:36 PM
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STRAILER
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Just so you know, the way you are testing the sensor is not a 100% test, the sensor must be operation to fully test it under load which is done with an oscilloscope.
Sep 11, 2025 at 9:19 AM
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JOE1953
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which one of the 4 wires I check for pulse at the Ignition coils wire connector?
Sep 11, 2025 at 10:03 AM
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STRAILER
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Here you go. Check out the images (below)
Sep 11, 2025 at 10:25 AM
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JOE1953
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which wire is the signal wire?
Sep 11, 2025 at 12:00 PM
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STRAILER
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I marked them for you, check the image above.
Sep 11, 2025 at 2:18 PM
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JOE1953
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I tested the crank sensor it is good. will the Reluctance wheel (ring) cause no spark on all 4 cylinder?
Sep 16, 2025 at 12:12 PM (Merged)
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STRAILER
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The first thing you should do is check the fuse listed below. Then turn the key on and test for power at the brown wire at any of the coils to see if there is power.

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

Check out the images (below). Let us know how it goes.
Sep 16, 2025 at 12:12 PM (Merged)
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JOE1953
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I check all the fuses under the hood with a multimeter I didn't find any blown, I havn't use the test light yet. do the Ignition switch need to be on for this test? I hope to find the problem soon the car need to be in working order.
Sep 16, 2025 at 12:12 PM (Merged)
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JOE1953
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I took #1 coil out and test for spark with a spark tester the type that ground to a bolt look like a spark plug. but I didn't see no spark and when I was doing the test smoke came from the top of the coil what cause the smoke? since then the engine want start and dies anymore how do I fix the problem? I scan the computer for engine codes and I have P0351, P0352, P0353, P0354.
Sep 17, 2025 at 8:30 AM (Merged)
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MECHTRIX
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These codes are for a faulty power supply for the 4 coils and since it smoked one of the coils you now need at leas that one I'd probably just get all 4 new as a set that's the starting point. let us know when you get the coils we can help but keep in mind it might have also fried the wires inside the wiring harness but either way I'd say get some coils first and let us know. Also, i would not try starting the car any more until you get the coils out could damage the wiring if it isn't damaged already.
Sep 17, 2025 at 8:30 AM (Merged)
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JOE1953
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I had already replace 4 new coils when I was testing for spark. I replace them after I scan for codes.
Sep 17, 2025 at 8:30 AM (Merged)
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MECHTRIX
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Okay, great. good looking out now can you make a short list for me as to what noticed first and what you're noticing now like
1
2
3
And so on
Like maybe top 5 things that are most important to you start from the beginning the worse thing you noticed to the least bad and also can you post a photo of the plugs and wires leading to the coils ? Then I'll look for the diagram you might need to solve this problem and I can help you if needed.
Sep 17, 2025 at 8:30 AM (Merged)
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JOE1953
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I don't know how to post a photo of the plugs and wires. will a crankshaft sensor cause no spark?
Sep 17, 2025 at 8:30 AM (Merged)
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MECHTRIX
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Yes, it could but that's most likely not the problem at this point. we need to focus on the codes. those codes are for a power supply problem to the coils which is why the smoke came out of your coil.
So I have a few things for you to try please do not try to start the engine until we've gone through all the steps.

1 unplug all 4 coils one at a time and label each one by writing on tape stick it on each one 1 2 3 and 4 keep them separate through all these steps
2. Now check the connectors /plugs to see if they look melted or anything looks abnormal about the connectors/plugs check them all then check them carefully again if good.
3.then check the wires leading to the plugs might have to carefully unravel the protective skin covering the wires till you can see them clearly. be careful not to damage any wires and check them about 6 inches back from the plugs.
4. once you expose them and can see them check all wires for damage broken melted etc., once you get to that point then let us know but keep in mind there's a chance we might need to rewire some or all of them were not there yet but might go there if we do you'll need more instruction and a few supplies and diagrams to follow after you do these things let us know and we'll go to the next steps, okay? Be well and good luck.
Sep 17, 2025 at 8:30 AM (Merged)
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JOE1953
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I didn't find any damage or broken melted wire.
Sep 17, 2025 at 8:30 AM (Merged)
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STRAILER
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I don't think all coils are bad at once, I would say the PCM is bad, I would search for a preprogrammed unit and swap it out, this should fix the problem.
Sep 17, 2025 at 8:30 AM (Merged)
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JOE1953
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explain how the reluctance ring and crankshaft sensor work on a toyota camry 2.4 and what both does? engine crank but want start and no spark. the engine was starting up and stop Immediately but now it want start up.
Sep 17, 2025 at 8:30 AM (Merged)