crank angle sensor ?s

ahmed

New Member
Jan 31, 2009
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cleveland
ok im reading .020-.017 from the senor at the ecu. and on my buddys 2jz i see .070ish..

my rush racing 2 step isnt workin and i think this is the issue. it works on my buddies car..
i pulled the sensor and cleaned it and still no fix.


my question is do this slowly get weaker and weaker and just give out. or am i geting the correct reading for a 1jz engine
 

RacerXJ220

Interdimensional
Mar 30, 2005
1,504
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Abalama
Sensors go bad. If it doesn't test to spec as per the TSRM, replace.

1. REMOVE NO.2 AIR TUBE FOR CAC
2. DISCONNECT CRANKSHAFT POSITION SENSOR
CONNECTOR
3. INSPECT CRANKSHAFT POSITION SENSOR
RESISTANCE
Using an ohmmeter, measure the resistance between terminals.
Resistance:
Cold
NIPPONDENSO
835–1,400 
AISAN
985–1,600 
Hot
NIPPONDENSO
1,060–1,645 
AISAN
1,265–1,890 
If the resistance is not as specified, replace the crankshaft
position sensor.
4. RECONNECT CRANKSHAFT POSITION SENSOR
CONNECTOR
5. REINSTALL NO.2 AIR TUBE FOR CAC
 

RacerXJ220

Interdimensional
Mar 30, 2005
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Abalama
No problem. I forget what the Ohm meter should be set to though. If you said your friend's came out .70 that doesn't match per TSRM but it may be right, just make sure you use the right value on the metering device.
 

Vlads2jz

New Member
Apr 11, 2009
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Cleveland
RacerXJ220;1408243 said:
No problem. I forget what the Ohm meter should be set to though. If you said your friend's came out .70 that doesn't match per TSRM but it may be right, just make sure you use the right value on the metering device.

That was Volts at idle.
 

Marotta1

Supreme Lurker
3. INSPECT CRANKSHAFT POSITION SENSOR
RESISTANCE
Using an ohmmeter, measure the resistance between terminals.
Resistance:
Cold
NIPPONDENSO
835–1,400 
AISAN
985–1,600 
Hot
NIPPONDENSO
1,060–1,645 
AISAN
1,265–1,890 
If the resistance is not as specified, replace the crankshaft
position sensor.

Thanks for this RacerXJ220. I had checked my crank sensor with the multimeter and got what I thought was a low reading, but that was per 2jz tsrm specs. I didn't know there were different values for different brands of crank sensors. It seems mine is within spec based on your post. Where did you find all that info?
 

RacerXJ220

Interdimensional
Mar 30, 2005
1,504
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Abalama
Marotta1;1408887 said:
Thanks for this RacerXJ220. I had checked my crank sensor with the multimeter and got what I thought was a low reading, but that was per 2jz tsrm specs. I didn't know there were different values for different brands of crank sensors. It seems mine is within spec based on your post. Where did you find all that info?

Straight out of the 95 MKIV TSRM. There should be a link to down load this somewhere on SF. I think that's where I got it from.

Glad to help out.
 
Mar 21, 2007
31
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0
Montebello,CA!
if the crank sensor is showing good resistance... what else would cause the motor to not spark??? already tested the ignitor... and it works on another car. any ideas?
 

Evilempire1.3JZ-GTE

SF what a waste of supras
Jun 22, 2006
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SoCal
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Several things actually can cause that.
1. Verify both the crank & cam sensors are good.
2. Verify the gap between the metalic trigger & sensor.
3. Verify you dont have any recessed pins in the sensor or ecu or ignitor connectors.
4. Verify the trigger metalic sprocket or lobe on the cam sensor is good.
5. Verify the IGF feedback wire from the ignitor to ecu is good (OEM ECU Only).
6. Verify ECU Health and power into it.
7. Verify the ground wire with noise filter is hooked up correct on the ignitor.
8. Verify the polarity of the cam and crank sensor it should rise then falling edge triger the ecu then re-center on 0 oscope will verify wave form polarity etc.
9. verify the clarity/noise in the triger signal it should be well insulated with a shield all the way from each sensor to the ecu plug noise such as O2 heater alternator etc can feedback into these signals and obliterate them so the ecu wont detect them even other EMI can bleed into these signal wires like radio celiular etc.
 

87supraguy

New Member
Mar 4, 2010
808
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Tucson, az
hey don't mean to "HI-JACK" but why start a new thread....i'm having trouble initially getting the motor to start on but whenever i get the 1jz running and it runs rough, my tach doesn't work yet but it's idleing pretty high i would guess around 1200-1500 rpm +/- and it's also missing and if i try to give it gas it bogs out and dies, if i try to creep into the RPMs the Rpms do rise but won't go higher than 2500-3k rpms(it begins to cut out and won't go higher, if i try to force it above that it bogs out and wants to die), soooo to me it seems like it's in limp mode. already checked and i am getting 12 volts at fuel pump.

checked for codes... i'm getting code 12... TSRM says cam sensors, crank sensors and ECU. i'll double checked the ECU for leaking caps and it's fine and also tested it on my buddies 1jz with no problems. so i researched forums and TSRM cause i would like to do is test the resistance in the cam and crank sensors and see if they're within spec before i go buy new sensors and find out that's not the problem but every where i go i'm getting different resistance ratings for the crank sensor...

2jz TSRM says:

CHECK RESISTANCE OF CAMSHAFT POSITION
Resistance:
Cold 835 – 1,400 ohm
Hot 1,060 – 1,645 ohm

CHECK RESISTANCE OF CRANKSHAFT POSITION
Resistance:
Cold 1,630 – 2,740 ohm
Hot 2,065 – 3,225 ohm


but in this thread the guys said he got his from TSRM also with different resistance ranges. according to the ranges above my cam sensors are fine but my Crank sensor is dead at 1133 ohms but with the ranges in this thread it's a good sensor... who's right? here's the link i got my INFO from http://www.turbosupras.com/pdfs/JZA80 TSRM/IG (2JZ-GTE).pdf

can someone maybe test the Cold and hot resistance on their cranks sensors just so we can see what the 1jz cranks sensors are averaging at? cause i was going to buy another cranks sensor but i had the guy test both sensors he had for sale and his readings came back 1183 ohms and 1103 ohms... still pretty close to what i had but he pulled the sensors off spare motors., so who knows if they even work.
 

aphxero

New Member
Jul 4, 2006
787
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Seattle, WA
Is this thing on stock ecu or what? in my experience the stock ecu isn't picky. It'll use a signal that's way out of range.

Has this thing ever run? If so what did you change? Think of the simplest explanation. Everything hooked up right?
 

87supraguy

New Member
Mar 4, 2010
808
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Tucson, az
sorry let me give more details.... bought the motor in april dropped it in ecu is stock and was tested on another buddies 1j the next town over. i go to turn it on and i'm having these issues and it's throwing code 12... nothing has been changed except the harness obviously had some work to convert it. now you say the ECU isn't picky? then why would toyota give specific ranges for the sensors? **(per TSRM)**"If the resistance is not as specified, replace the crankshaft position sensor." i'm just having trouble seeing how you would think a sensor way out of range can still operate correctly? soo i double checked the resistances in my cam and crank sensors again today for the hell of it figuring some how maybe i did it wrong.

Crank sensor: 1120 ohms (small change from the original 1133ohms i was getting)

front cam sensor: 1122 ohms
rear cam sensor: 958 ohms

i also double checked the timing and it's perfect... all i'm getting is code 12 which brings me back to these sensors.
 
Last edited:

Evilempire1.3JZ-GTE

SF what a waste of supras
Jun 22, 2006
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SoCal
www.myspace.com
code 12
is no engine rpm it doesnt know the internal engine layout when to fire.

if the ecu & ignitor is good check them off the fault list.
now your problem is anything from miss wire misspin recesed pin wiring done wrong to the sensors to the mechanical trigger itself. like is the timing belt even in? does the cam rotate is there a metalic lob on the cam and crank pully is the gap or sensors good.

It takes very little for the 1jz to run a couple sensors fuel the ic and plumbing could even be off I have even seen these engines run with bad ECUs.
For example the crazy previous owner of my supra had holes cut into the hood like vents so it could rain streight down into the front of the engine it also didnt have the cam covers on the car so guess what sensor got the most fubar readings. People usually have to go out of their way to screw a 1JZ up.
 

87supraguy

New Member
Mar 4, 2010
808
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Tucson, az
ecu and ignitor were tested on another 1j in phoenix and it ran fine. i may have to look at the harness again than to double check and the Timing belt is on and everything is aligned perfectly to TDC. cam and crank does rotate.. you ask ing the sensors are good? that was my original concern actually... since i initially posted in this thread i've come across about 4 different resistance ranges for the crank sensor alone and 2 of them werer from Toyota and they even reflect different info... that's why i'm hoping someone can "COLD" test the crank sensor on their running 1j to see range is closer to be correct.