Hey all,
My first post is to ask assistance from the forum.
I need to provide info to my Satellite Navigation fitter who is having difficulty finding the wire that carries the speed sensor pulse. We require this for connecting the unit into the system.
I believe the wiring diagram will provide that info but you guessed it.... no diagram.
I have a 2005 Nissan Pathfinder ST-L (Australia).
Can anyone help, it is urgent and important...
Hey all,
My first post is to ask assistance from the forum.
I need to provide info to my Satellite Navigation fitter who is having difficulty finding the wire that carries the speed sensor pulse. We require this for connecting the unit into the system.
I believe the wiring diagram will provide that info but you guessed it.... no diagram.
I have a 2005 Nissan Pathfinder ST-L (Australia).
Can anyone help, it is urgent and important...
Thanks
Savs
This is info on US models but likely to be the same for you. The CAN system sends a data signal via computer language to the unified meter to operate the speedometer so you would need a signal from the sensor it self. The problem with this is paralleling the signal from the sensore may have adverse affects of the signal going to the PCM. You should contact Nissan on this issue, unless someone here has already found out how to do this and posted the info.
__________________ It's much easier to travel through a maze when you have a map!
Spat
Former Nissan Tech
14yrs ASE all but AT it's a bitXX!
New career - HandyMan/Electrician - Freedom at last!!
86.5 Nissan HB D21 234K Miles
94 Nissan Altima GXE ? Miles
97 Dodge Grand Caravan 3.8L 132K Miles
64 Chrysler 300-K 2-door Convertible 63K Miles
This is info on US models but likely to be the same for you. The CAN system sends a data signal via computer language to the unified meter to operate the speedometer so you would need a signal from the sensor it self. The problem with this is paralleling the signal from the sensore may have adverse affects of the signal going to the PCM. You should contact Nissan on this issue, unless someone here has already found out how to do this and posted the info.
Thanks fot the prompt response, sounds like you know your oil. What is a CAN?
Do you know where the sensor is located and which path it takes to the computer sys?
I was hoping to get in touch with Nissan next week but this post may be of help as well. I understand that the protocol/pulse/signal may be either encapsulated or re packaged via the computer sub-systems but I hoped to tap the signal before is gets to the system and use that output to the Sat Nav. I didn't think of the adverse affects, good info thanks..... I guess I will have to do a bit of testing. If you can add anything I would appreciate guidance.
Savs
Thanks fot the prompt response, sounds like you know your oil. What is a CAN?
Do you know where the sensor is located and which path it takes to the computer sys?
I was hoping to get in touch with Nissan next week but this post may be of help as well. I understand that the protocol/pulse/signal may be either encapsulated or re packaged via the computer sub-systems but I hoped to tap the signal before is gets to the system and use that output to the Sat Nav. I didn't think of the adverse affects, good info thanks..... I guess I will have to do a bit of testing. If you can add anything I would appreciate guidance.
Savs
Unless Nissan has made major changes recently, the speed sensor on the transmission sends a sine wave pulse to the instrument cluster, which in turns sends the signal to the ECU. Sounds like you want to tap off the trans sensor.
__________________
Life is too short to take it too seriously
Thanks fot the prompt response, sounds like you know your oil. What is a CAN?
Do you know where the sensor is located and which path it takes to the computer sys?
I was hoping to get in touch with Nissan next week but this post may be of help as well. I understand that the protocol/pulse/signal may be either encapsulated or re packaged via the computer sub-systems but I hoped to tap the signal before is gets to the system and use that output to the Sat Nav. I didn't think of the adverse affects, good info thanks..... I guess I will have to do a bit of testing. If you can add anything I would appreciate guidance.
Savs
Ok I have put together 14 pages from the service manual this is the only info. I could find without doing an indepth study. I have only glanced over the pages so I don't Know the answer you want. I am providing the materials you need to find your answer.
CAN is an acronim for "central area network" It is a controle module that links all other controle modules together for shareing info. What I have detirmind from these pages is the speed sensor sends it's signal to the TCM then I think it is converted to a data signal and sent to the CAN wich sends it to both ASCD and PCM. I believe the speedometer is controled with-in the unified meter based on a signal from the CAN. The signal from CAN to unified meter is a culculated value done by ABS module based on wheel speed sensors and then sent to the CAN. Here is the file Download File
Animal... yes we are going thru a lot of majore changes. Not sure of the date but I think all manufacturers are required to meet OBDIII standardes by 2007 and CAN is part of it.
__________________ It's much easier to travel through a maze when you have a map!
Spat
Former Nissan Tech
14yrs ASE all but AT it's a bitXX!
New career - HandyMan/Electrician - Freedom at last!!
86.5 Nissan HB D21 234K Miles
94 Nissan Altima GXE ? Miles
97 Dodge Grand Caravan 3.8L 132K Miles
64 Chrysler 300-K 2-door Convertible 63K Miles
Ok I have put together 14 pages from the service manual this is the only info. I could find without doing an indepth study. I have only glanced over the pages so I don't Know the answer you want. I am providing the materials you need to find your answer.
CAN is an acronim for "central area network" It is a controle module that links all other controle modules together for shareing info. What I have detirmind from these pages is the speed sensor sends it's signal to the TCM then I think it is converted to a data signal and sent to the CAN wich sends it to both ASCD and PCM. I believe the speedometer is controled with-in the unified meter based on a signal from the CAN. The signal from CAN to unified meter is a culculated value done by ABS module based on wheel speed sensors and then sent to the CAN. Here is the file Download File
Animal... yes we are going thru a lot of majore changes. Not sure of the date but I think all manufacturers are required to meet OBDIII standardes by 2007 and CAN is part of it.
Spat,
This is absolutely great, Thanks for the PDF I have begun studying it. We are well on the way but I need to find some relevant links in your document ie the LAN .PDF and Speed Sensor location. I am reluctant to keep asking for help....but here goes.
Are you able to assist with the location of the sensor wire to tap into and are you aware of the need to convert the "sine" back to a singal the SATNAV understands?
Spat,
This is absolutely great, Thanks for the PDF I have begun studying it. We are well on the way but I need to find some relevant links in your document ie the LAN .PDF and Speed Sensor location. I am reluctant to keep asking for help....but here goes.
Are you able to assist with the location of the sensor wire to tap into and are you aware of the need to convert the "sine" back to a singal the SATNAV understands?
Savs
The sensor is located on the rear of the tranny just under the tail and above the pan. I do not know wich wire to tap into but the scematic would show it. I have no clue what type of signal your navigation unit can read. The tech installing it should know. He should also have a resource to get info on converting the signal. A special adapter is probably needed for this. If I was him I would take the time to learn this, it gives him a good reason to charge extra on future installs of this type to cover his time. This is why the more experinced in whatever field have higher rates, you pay for their knowledge.
__________________ It's much easier to travel through a maze when you have a map!
Spat
Former Nissan Tech
14yrs ASE all but AT it's a bitXX!
New career - HandyMan/Electrician - Freedom at last!!
86.5 Nissan HB D21 234K Miles
94 Nissan Altima GXE ? Miles
97 Dodge Grand Caravan 3.8L 132K Miles
64 Chrysler 300-K 2-door Convertible 63K Miles
Hey Thanks everyone for their comments re my issues withe the speed sensor.
It seems the newly installed system (Blaupunkt DX-V) is not designed for late model vehicles with "Computer Area Network" systems. The sensor pick up does in fact publish a sine from the trans and puts it on the network for the system to use, unfortunately the Blaupunkt DX-V SatNav can't pickup and convert a sine and apparently there is no converter to do the job.
My fitter at Audiocom advised me Blaupunkt are aware of the issue even as new vehicles were being released, but decided to rely on the installers/fitters/suppliers to do the ground work on resolution and workarounds.
I am now at a point (disappointed) that I will have to return the unit and try for something else less technical and less attractive.
Again thanks to all for your input, and if you come up with something new..... please post it up, I will be waiting.
Kindest Regards
Kelvin (Australia) (not my fault... I was born here LOL)
Hey Thanks everyone for their comments re my issues withe the speed sensor.
It seems the newly installed system (Blaupunkt DX-V) is not designed for late model vehicles with "Computer Area Network" systems. The sensor pick up does in fact publish a sine from the trans and puts it on the network for the system to use, unfortunately the Blaupunkt DX-V SatNav can't pickup and convert a sine and apparently there is no converter to do the job.
My fitter at Audiocom advised me Blaupunkt are aware of the issue even as new vehicles were being released, but decided to rely on the installers/fitters/suppliers to do the ground work on resolution and workarounds.
I am now at a point (disappointed) that I will have to return the unit and try for something else less technical and less attractive.
Again thanks to all for your input, and if you come up with something new..... please post it up, I will be waiting.
Kindest Regards
Kelvin (Australia) (not my fault... I was born here LOL)
Do you know what input the unit requires? It would be easy to convert the sine to a square wave, for example.
__________________
Life is too short to take it too seriously
Do you know what input the unit requires? It would be easy to convert the sine to a square wave, for example.
Animal,
I have just spoke to the supplier, they are negotiating with Blaupunkt for a resolution, yeah right.
How would you convert a sine to a square wave, and would that satisfy the system, ie, is is that what is expected from the unit and by the CAN bus? I believe there is a converter from sine but to what I do not know.
We are still learning as we go but it is slowly coming together with all the input and help I have been getting form this forum, keep it up guys.
This is the only part I can respond to: a voltage comparator and a few resistors, available from most electronics parts suppliers.
Well I am just about to launch into the next chapter with the supplier. It seems they (Audiocom) spoke to Blaupunkt and are none the wiser. I am not sure what detail was discussed but the apparent resolution is to put a speed sensor unit either on the drive shaft like the good old days or a system that uses the wheels revolution and magnetic pickup units along side, thus sensing speed. It is not promised to be as acurate as the sensor from the transmission but at least we will get it on the road.
Has anyone got more info on the vehicles speed sensor unit before I commit to the magnet and wheel solution.
Well I am just about to launch into the next chapter with the supplier. It seems they (Audiocom) spoke to Blaupunkt and are none the wiser. I am not sure what detail was discussed but the apparent resolution is to put a speed sensor unit either on the drive shaft like the good old days or a system that uses the wheels revolution and magnetic pickup units along side, thus sensing speed. It is not promised to be as acurate as the sensor from the transmission but at least we will get it on the road.
Has anyone got more info on the vehicles speed sensor unit before I commit to the magnet and wheel solution.
Thanks All,
Savs
A magnetic pickup will produce a sine wave - same as the existing pickup in the trans. Is that the expected input?
__________________
Life is too short to take it too seriously
A magnetic pickup will produce a sine wave - same as the existing pickup in the trans. Is that the expected input?
Well it's finished (sort of)
I opted for a VDO wheel sensor kit, against all better judgement, but hey it does work. The sensor unit is located inside the vehicle, a strong magnetic wand is strategically rubbed against/on the steel belt tyre in two places thus giving the tyre a North South axis, then calibrate Ta Da !!!!
We have it accurate to about 10 metres, not bad for first attempt. This weekend I will try to get better results by carefully setting the magnetic tyre into a Quad sector type arrangement and therefore increasing accuracy (apparently).. I will at least try the process but revert if necessary.
Thanks to all for their input, it made the fitter and supplier open their eyes to the fitting of such devices. Please feel welcome to add to this post if you come up with any new innovative idea.
Linear Mode
