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The mkiv Supra Owners Club

Help Crank sensor- no voltage


ardasaliah
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My car is not sparking at all.

 

 

I need some advice- When I unplug the crank sensor- the ECU does not register a fault code. However it registers any other sensor that I unplug e.g. turbo pressure.

 

My car is not producing a spark at the moment- so i check the resistance on the crank sensor and it was within range. so that’s fine. The ignitors fine

 

The problem is that the electrical connector to the crank sensor has no voltage at all when the ignition is on (just before starter cranks)

 

Could this be my problem. The multimeter shows a voltage of 0.02 at the plug. Surely it should be more. All the other sensor that I check all have about 5 v.

 

any advice?

hope this is clear.

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I don't think they get fed a voltage, isn't it just a pulse signal generated by the Hall effect or something? The wiring diagram backs that up, it's got two grounds, a common position sensor one and a unique one for that sensor (B27 in this case).

 

I guess if you had a fast reacting enough multimeter you could measure its pulse output while turning the engine over?

 

You can also check the sensor's resistances, which should be:

Cold (0-50degC) 835-1400ohms

Hot (50-100degC) 1060-1645ohms

 

-Ian

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The crank position sensor works by "inductive pulse".

 

To test : Disconnect the crank sensor multi plug, measure across the two outputs of the sensor plug with a multimeter set on AC volts. AC not DC. While someone cranks the engine look at the output, you should have at least 0.5v and preferably rising as the engine cranks.

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