Engine cranks but does not start?

Tiny
ANDRIN ATEM
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This is the test I have carried out using a multimeter, I connected all 3 wires to see what is happening when I crank the toyota pickup.

The signal wire which is yellow in color, has a standby current of 5 volts, the white power cable has 5 volts static, while the red wire cable is ground. When I crank, the reading I get from the signal wire which is yellow in color, drops to 2.5 and plays within 2 8 or 2 9 volts.
My question is simple, normal as the crankshaft rotates, the faster it rotates the higher is suppose to read on the signal, and when vehicle is idling, it should play within 5 volts. Please let me know if I am correct, if so, this means the crankshaft sensor in my pickup is bad, because, instead of the volts increasing or atleast maintains 5 volts to start the car, it rather drops all the way to 2.5 while cranking.
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Wednesday, October 5th, 2022 AT 7:17 AM
Tiny
JACOBANDNICKOLAS
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Hi,

You are correct. It does sound like a faulty sensor. Let me know if that takes care of the issue.

Joe
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Wednesday, October 5th, 2022 AT 5:16 PM
Tiny
ANDRIN ATEM
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Please can you help me out with the Injector voltage and signal for the diesel Injector? I am getting on both wires going to the injector about 2.5 volts on either side. Also, when I did the resistance test on my injectors I got 0.1 oms of resistance. I need to very if this is correct before going to replace my crankshaft sensor.
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Monday, October 10th, 2022 AT 3:58 AM
Tiny
ANDRIN ATEM
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Please can you help me out with the Injector voltage and signal for the diesel Injector. I am getting on both wires going to the injector about 2.5 volts on either sides. Also when I did the resistance test on my injectors I hot 0.1 oms of resistance. I need to very if this is correct before going to replace my crankshaft sensor.
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Monday, October 10th, 2022 AT 3:58 AM
Tiny
ANDRIN ATEM
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All I need right now to round up my test on this 2018 Tokyo Hilux diesel 4wd, is the voltage that needs to be on both injectors wire connectors, it's a two wire cables. I would also like to know the resistance test for the Injectors.

I would really appreciate it if you have this information in your system.
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Monday, October 10th, 2022 AT 4:07 AM
Tiny
JACOBANDNICKOLAS
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I ran into a wall when checking info. I need the production date of the vehicle. It appears there are two variations of the powertrain management circuits based on date. See pic below.

Let me know.

Joe

See pic below.
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Monday, October 10th, 2022 AT 6:55 PM
Tiny
ANDRIN ATEM
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2018.
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Monday, October 10th, 2022 AT 8:37 PM
Tiny
ANDRIN ATEM
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2018 diesel turbo 4x4 not a push button.
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Monday, October 10th, 2022 AT 8:40 PM
Tiny
JACOBANDNICKOLAS
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Hi,

I was able to find the testing for resistance, but there is nothing I am able to find specific to voltage. I would think it would be B+ voltage but I can't confirm it. Any injector that I can think of works off 12v. They have power all the time and the ECM provides a ground path for the injector.

Take a look below and let me know if that helps.

Take care,

Joe

See pic below.
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Tuesday, October 11th, 2022 AT 6:26 PM
Tiny
ANDRIN ATEM
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Thank you. I was rather getting 0.1 ohms of resistance. Probably the value is not as specified in the table below.
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Tuesday, October 11th, 2022 AT 7:13 PM
Tiny
ANDRIN ATEM
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I had these two codes fault stability and turbine transmission speed sensor.
I hope the turbine speed sensor one of them is responsible for why I am not getting the 12 volts on my I injectors. Those are the only two codes I keep getting now.
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Tuesday, October 11th, 2022 AT 7:24 PM
Tiny
ANDRIN ATEM
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P1604 and 0715. The input turbine speed sensor and faulty stability which has to do with starting system. Maybe you can share your expertise.

Thank you Joe.
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Tuesday, October 11th, 2022 AT 7:28 PM
Tiny
JACOBANDNICKOLAS
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Hi,

The 715 is related to the trans and I wouldn't think it's related. 1604 does seem related. I attached the diagnostics for 1604. Take a look through them and let me know if you are comfortable performing them.

Take care,

Joe

See pics below.
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Tuesday, October 11th, 2022 AT 8:00 PM
Tiny
ANDRIN ATEM
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Thank you very much.
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Tuesday, October 11th, 2022 AT 8:24 PM
Tiny
JACOBANDNICKOLAS
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Hi,

You are very welcome. If you have a chance, let me know how things turn out for you. Also, let me know if I can help in any way.

Take care,

Joe
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Wednesday, October 12th, 2022 AT 5:21 PM
Tiny
ANDRIN ATEM
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Thanks again. However following the values of the injectors, all 4 injectors read 0.0 ohms. I am sure those injectors are not good.
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Wednesday, October 12th, 2022 AT 10:06 PM
Tiny
JACOBANDNICKOLAS
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Hi,

If you have 0 resistance, the injector is bad. It should be between 11 and 14 Ohms. Some can reach up to 24 Ohms.

Take a look through this link:

https://www.2carpros.com/articles/how-to-test-a-fuel-injector

Let me know.

Joe
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Thursday, October 13th, 2022 AT 6:34 PM
Tiny
ANDRIN ATEM
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Mine is a diesel nuzzle with no fuel pump in the tank, does the resistance remain same?
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Thursday, October 13th, 2022 AT 7:09 PM
Tiny
JACOBANDNICKOLAS
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Hi,

I can't be sure if they are the same, but I don't see how they would be 0. I would think they would still fall into the same resistance range. Did you get a different reading?

Joe
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Friday, October 14th, 2022 AT 9:06 PM
Tiny
ANDRIN ATEM
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Yes, I took another reading from a Mercedes sprinter diesel injectors, readings were withing specification. I concluded injectors with o. Oo ohms resistance are bad.
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Friday, October 14th, 2022 AT 11:17 PM

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