Correct knock sensor,still problem?

[sabing]

Hi, i got the correct knock sensor replacement type from you and I clipped it in, fired it up, and I still get the code. I had toyota check the wiring for it about 2 weeks ago so they figured the sensor must have been bad. Was the one you sent me for sure good? When I had the one you sent that didnt fit I tried it out by using a wire to connect to the sensor and the other end I stuck into the clip and I didnt get the code anymore. Any ideas?

[CJMR2T]

Not sure of the who situation here as it sound like you are taking to someone specific but besides all that, what code are you getting, a 52 or a 53?

[sabing]

52 is what im getting
short in knock sensor circuit correct?

[mister3]

Originally Posted by sabing

52 is what im getting
short in knock sensor circuit correct?

yeah but it still could be the knock sensor if the other sensor cleared the code. will mail you out a new one if you email me shipping addy again... also need to send the incorrect knock sensor back

[CJMR2T]

Have you tried running a new wire to the old sensor?????

9 times out of 10 a code 52 is a wiring problem....... Just cause toyota checked it doesnt mean that they checked it correctly.... It might be an intermitent problem. I've seen cars where it checked out fine when it was cold, but once the engine bay and thus the harness heated up, the knock wiring would go to an open circuit.... Most of the time Tech's only do basic tests which sometimes aren't enough.

Example, they might have just check resistance from the knock sensor end to the ECU and it very well could have been .1ohms....... So the wire would be good. Now, did they check between either end and ground and make sure that there was no continuity??? This is what seems to be the comment thing that I have seen in cars that had a wiring issue causing a 52. Either an open circuit or shorted to the shielding inside the cable....

[mister3]

Originally Posted by CJMR2T

Have you tried running a new wire to the old sensor?????

9 times out of 10 a code 52 is a wiring problem....... Just cause toyota checked it doesnt mean that they checked it correctly.... It might be an intermitent problem. I've seen cars where it checked out fine when it was cold, but once the engine bay and thus the harness heated up, the knock wiring would go to an open circuit.... Most of the time Tech's only do basic tests which sometimes aren't enough.

Example, they might have just check resistance from the knock sensor end to the ECU and it very well could have been .1ohms....... So the wire would be good. Now, did they check between either end and ground and make sure that there was no continuity??? This is what seems to be the comment thing that I have seen in cars that had a wiring issue causing a 52. Either an open circuit or shorted to the shielding inside the cable....

from the sounds of it it is the knock sensor and not the wiring.

[CJMR2T]

Originally Posted by mister3

from the sounds of it it is the knock sensor and not the wiring.

If you read below, from his first post he said that he hooked up the one that he got and still got the code...

Originally Posted by sabing

Hi, i got the correct knock sensor replacement type from you and I clipped it in, fired it up, and I still get the code.

Below is where he then says that he hooked up the sensor with a seperate wire and not more code...

Originally Posted by sabing

When I had the one you sent that didnt fit I tried it out by using a wire to connect to the sensor and the other end I stuck into the clip and I didnt get the code anymore. Any ideas?

So, changing the sensor still gave the code but a seperate wire elminated the code... Sounds like the typically toyota code 52 wiring issue to me....

[mister3]

Originally Posted by CJMR2T

If you read below, from his first post he said that he hooked up the one that he got and still got the code...




Below is where he then says that he hooked up the sensor with a seperate wire and not more code...



So, changing the sensor still gave the code but a seperate wire elminated the code... Sounds like the typically toyota code 52 wiring issue to me....

dum dum... check this:

he stated he had a 1991 MR2. i sent him a 1991 knock sensor. he actually has a 93 knock sensor on his engine (?) so he installed the 91 knock sensor and "wired" it in and the code went away. the replacement knock sensor i sent might be faulty as well so i will send another i know is good (off my gen3) so there won't be any issues of maybe knock or maybe wiring.

i 100% believe it to the the knock sensor at this point and until i can send another which works (like the 91) then the wiring can't be blamed yet.

[CJMR2T]

Wait, so how many different sensors has he had then????

Im not very familiar with MR2 specific's but I am very familiar with toyota's in general and the TCCS system and all its functions so how is the year significant? Did the plug change in the later years?

From what he says in the first post, it sound like he installed one and ran it through the stock wiring and still got the code. Later it sounds like he wired it via a seperate wire and the code went away.... If this is the case, then how could it possibly be the sensor???

Before you call anyone "Dum Dum..." lets see exactly in detail what he has done and not done. You are not there working on the car and installing and rewiring things are you? No and at that same token, neither am I but from what he has said, I can side more with a wiring then a bad sensor (although, it could be a combination of the two too).............

Now if there is more then 2 sensors involved here at the present time and the same proceedures were not done with all sensors in question, then no one can say its one thing or the other as to whether its the wiring or the sensor.

My question to sabing is how many sensors are you working with here and what exactly was done with each sensor???

[mister3]

Originally Posted by CJMR2T

Wait, so how many different sensors has he had then????

Im not very familiar with MR2 specific's but I am very familiar with toyota's in general and the TCCS system and all its functions so how is the year significant? Did the plug change in the later years?

From what he says in the first post, it sound like he installed one and ran it through the stock wiring and still got the code. Later it sounds like he wired it via a seperate wire and the code went away.... If this is the case, then how could it possibly be the sensor???

Before you call anyone "Dum Dum..." lets see exactly in detail what he has done and not done. You are not there working on the car and installing and rewiring things are you? No and at that same token, neither am I but from what he has said, I can side more with a wiring then a bad sensor (although, it could be a combination of the two too).............

Now if there is more then 2 sensors involved here at the present time and the same proceedures were not done with all sensors in question, then no one can say its one thing or the other as to whether its the wiring or the sensor.

My question to sabing is how many sensors are you working with here and what exactly was done with each sensor???

it's just 1 sensor he's messing with. the connection does change between 91 and 93 which is why he had to jump the 93 connection with a wire to the 91 knock sensor

and why bother commenting on something you really are not up to speed about?

a) don't know connections change
b) don't know the 3sgte only has one knock sensor
c) not a thread posted in some random area

[sabing]

Just for your info CJMR2T
1. My original knock sensor all the sudden went out. I then had toyota check wiring and they ran a new coax cable
2. I was sent the 91 sensor but it has a different clip then the sensor installed.
3. with this 91 sensor I bridged the clip on the sensor and the plug on wiring for the knock sensor and I got no code
4. I was then sent the correct shaped sensor but then I got the code again(52)

I didn't hook up the sensor with a separate wire, I just fed a wire into the clip that attaches to the sensor so the wiring must not be bad. (the toyota guy ran a whole new co-ax cable to the ECU it appears)

Plug will be sent back asap
I apologize for the inconvenience this has caused

[CJMR2T]

Originally Posted by mister3

it's just 1 sensor he's messing with. the connection does change between 91 and 93 which is why he had to jump the 93 connection with a wire to the 91 knock sensor

and why bother commenting on something you really are not up to speed about?

a) don't know connections change
b) don't know the 3sgte only has one knock sensor
c) not a thread posted in some random area

Dum dum, I know it only has one sensor. I was asking how many sensors he has been dealing with which is 3 read it, THREE the stock one, and two that you have sent him. If you reread what i said, it asks how many different sensors has he had. No where did I say or ask about how many the car has.. You should loose the cocky attitude... I know that toyota changed the connectors on all there cars in the mid 90's cause Denso changed but differnent cars changed at different times.... And yes I saw your post in another thread with him about the sensor a bit ago and the cocky attitude was there too about how you've been working on these cars for 10years and there for you should know what sensor is right for his car...... Now yes, you are right about it, but that was a very cocky way to say it.

Back to the whole subject at hand, knowing now that there is more then 2 sensors in question, and him explaning in more detail about what has been done, yes I agree that the 3rd (second one you have sent him) is a bad sensor... I miss understood what he was meaning with his comment of

[qoute=sabing] When I had the one you sent that didnt fit I tried it out by using a wire to connect to the sensor and the other end I stuck into the clip and I didnt get the code anymore.[/qoute]

I misunderstood him in thinking that by "clip" he ment at the ECU. If this were true, then it would be the wiring. Being that he is meaning the "clip" as in the sensor harness plug, then yes, like I said, I agree its the sensor....

One thing you dont know and kinda have to take into consideration here is that up until about a year ago I was a tech at a local toyota dealership for nearly 12years and almost 5 of those were actually as a head master tech. If all the info is not given upfront and detailed, misunderstandings can easily arise. This is also why I stated about the tech at toyota possibly not diag'ing it correctly I've seen it countless time in many tech that have worked with me and or under me. Had I known that he has been dealing with 3 different sensors here and all that was actually done as it was detailed in his latest post, I would have agreed with you from the get go.. Remember, this is an open forum thus ease of confussion due to lack of info especially being that this thread started in the middle of a whole situation...

[mister3]

Originally Posted by CJMR2T

Dum dum, I know it only has one sensor. I was asking how many sensors he has been dealing with which is 3 read it, THREE the stock one, and two that you have sent him. If you reread what i said, it asks how many different sensors has he had. No where did I say or ask about how many the car has.. You should loose the cocky attitude... I know that toyota changed the connectors on all there cars in the mid 90's cause Denso changed but differnent cars changed at different times.... And yes I saw your post in another thread with him about the sensor a bit ago and the cocky attitude was there too about how you've been working on these cars for 10years and there for you should know what sensor is right for his car...... Now yes, you are right about it, but that was a very cocky way to say it.

Back to the whole subject at hand, knowing now that there is more then 2 sensors in question, and him explaning in more detail about what has been done, yes I agree that the 3rd (second one you have sent him) is a bad sensor... I miss understood what he was meaning with his comment of

[qoute=sabing] When I had the one you sent that didnt fit I tried it out by using a wire to connect to the sensor and the other end I stuck into the clip and I didnt get the code anymore.[/qoute]

I misunderstood him in thinking that by "clip" he ment at the ECU. If this were true, then it would be the wiring. Being that he is meaning the "clip" as in the sensor harness plug, then yes, like I said, I agree its the sensor....

One thing you dont know and kinda have to take into consideration here is that up until about a year ago I was a tech at a local toyota dealership for nearly 12years and almost 5 of those were actually as a head master tech. If all the info is not given upfront and detailed, misunderstandings can easily arise. This is also why I stated about the tech at toyota possibly not diag'ing it correctly I've seen it countless time in many tech that have worked with me and or under me. Had I known that he has been dealing with 3 different sensors here and all that was actually done as it was detailed in his latest post, I would have agreed with you from the get go.. Remember, this is an open forum thus ease of confussion due to lack of info especially being that this thread started in the middle of a whole situation...

well... this section of the forum i pay for so it isn't as open as you think

but i do agree that some of the issue did get lost in translation and we're on the same page now.