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IS - 1st Gen (2001-2005) Discussion about the IS models up to the 2005 model

Crank sensor circuit problem

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Old Dec 27, 2024 | 09:20 AM
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Bigmanlexus's Avatar
Bigmanlexus
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Default Crank sensor circuit problem

About 3 weeks back,I took my sports car out as usual....however while driving,I noticed the engine sounded rough and was eating gas like mad.so before I pulled up to a gas station.....the car stalled immediately I landed off a bump. I felt oh well I'm outta gas,after buying 8litres,I fired he'd for good 5mins,there was some sort of delay from gear 1 to gear 2 and gear 3 just picks like a train. After doing all for the day,I pulled up to my mechanic and complained to him that I suspect something is wrong with either the plugs ,fuel pump,fuses. We did every check and even changed spark plugs,the car sounded normal and I fired her ,however slowing down to a bump ,the engine sounds like it wants to stall.i managed it home,took it out for a spin couple of days back,it stalled twice ,and did a final stall immediately i climbed the hill of my house and got home. Oh my gawd since then it has gulped almost 20 dollars both on quacks and charge and bail mechanics.
we started from ,oh it's fuel pump,fuel pump changed,fuel pump has pressure,when u turn key in 2 position ,fuel gulps from the top casing hole.so issue of fuel pump ruled out
wasted money...
battery drained.recharged battery,still problem persists.
Car refused to start..only cranks...then kills battery.

New plugs were installed. It won't start,if it does. It will backfire and stall...then from there it kills the battery...
another wasted funds.

Last but not least,another chief quack electrician,came and said,oh the sensor ,crank sensor wires are bad and the plugs have spoilt m,out of desperation,he gave me a made shift 2pin plug,but because the battery was already flat for the third time, he said it should work,once I charge battery.howver the makeshift 2pin he gave me,looks like a radio cable or something.it did not clip well into the plug because the pin width are not the same .we tried and tried the engine only cranks and rolls but won't start .killing the battery
so I got frustrated and abandoned the car.
Now I need it back running. I went to junk msrket to get the replacement since aliexpress won't deliver till month end next year. I did take pics of the ones I saw online,with the part number ,and I was able to get the 2pins female plug...I inserted it into the male plug connector and boom, it fitted tightly into it,with no struggle, but there are two wires,I think yellow or so ,and I want to rejoin them back myself.pks guys guide me.
the lexus said,if the crank angle sensor plug is broken.the engine can never start.


We did a starter bypass tester and the engine started but stalled immediately after 5seconds.so pls how can I connect back the plug wires.its just a cut and join stuff . So I need to charge the battery complete. Plugs have been serviced ,Al sensors blown with cleaner,




[img alt="The makeshift useless god knows what 2pin plug this is, looks like a radio wire,wont fit and engine will only roll but not start....

"]https://cimg8.ibsrv.net/gimg/www.clublexus.com-vbulletin/2000x1504/20241226_090123_8b34844ca6a1436619e5dfc424a72ffb61f5f23a.jpg[/img]
The makeshift useless god knows what 2pin plug this is, looks like a radio wire,wont fit and engine will only roll but not start....
The replacement ,direct factory fit.
The replacement ,direct factory fit.


Last edited by Bigmanlexus; Dec 27, 2024 at 09:25 AM.
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