Steering lock problem solved (for real)

SPOHN · 05-27-2012, 01:27 PM

Super epic. Great job Frank and Dai

happytheman · 05-27-2012, 05:34 PM

Quote:

Originally Posted by Ubetit

Your diagram is incorrect. The only connection between the SLR and TCMR is an 80A fuse that feeds the 4 fuses. It is the ECM relay that has a relationship with the TCMR.

Confirmed by this schematic from the other thread. (Image credit to GaleForce)

Yup, this is exactly how I understood the schematic! Thanks for the post!

KaienZ34 · 05-27-2012, 05:52 PM

Damnit, i just paid for my bypass plug last night. I thought someone had tried the fuse removal first, as if seems like the easiest thing to do.

Baer383 · 05-27-2012, 06:07 PM

Quote:

Originally Posted by KaienZ34

Damnit, i just paid for my bypass plug last night. I thought someone had tried the fuse removal first, as if seems like the easiest thing to do.

they may have but this fuse box is hidden next to the battery and does not look like a fuse box b/c it is about 4in x 6in.

KaienZ34 · 05-27-2012, 06:25 PM

Cool deal thanks and reps to you and my lovely DAI.....

happytheman · 05-27-2012, 06:29 PM

Looks like I've got some work to do.

+rep

simota1 · 05-27-2012, 07:06 PM

god damn it i sent the money for the harness last week

simota1 · 05-27-2012, 07:07 PM

good find though guys

bdl99 · 05-27-2012, 08:31 PM

Cool.

Looking at the diagram, the only thing I noticed regarding the cut the wire vs pull the fuse approach is the point highlighted below.

With the pull the fuse method the point highlighted with the blue arrow wont be powered going in to the CPU. I'm not saying it makes any difference, but when cutting the brown wire it is breaking the circuit further downstream and therefore that point will continue to be fed with power, where as removing the fuse it will not. Again not saying it makes any difference but would think that point serves some purpose, maybe just an error code?

Baer383 · 05-27-2012, 09:31 PM

Quote:

Originally Posted by bdl99

Cool.

Looking at the diagram, the only thing I noticed regarding the cut the wire vs pull the fuse approach is the point highlighted below.
With the pull the fuse method the point highlighted with the blue arrow wont be powered going in to the CPU. I'm not saying it makes any difference, but when cutting the brown wire it is breaking the circuit further downstream and therefore that point will continue to be fed with power, where as removing the fuse it will not. Again not saying it makes any difference but would think that point serves some purpose, maybe just an error code?

No codes,no problems,the car has been running,driving,parked,locked,unlocked and everything we could think off no CEL it just acts like a normal 370 but with no steering lock.And that location marked with the blue arrow @ the cpu is for the steering lock so it doesn't come in to play.

bdl99 · 05-27-2012, 10:56 PM

Quote:

Originally Posted by Baer383

No codes,no problems,the car has been running,driving,parked,locked,unlocked and everything we could think off no CEL it just acts like a normal 370 but with no steering lock.And that location marked with the blue arrow @ the cpu is for the steering lock so it doesn't come in to play.

But you agree that the blue arrow is an input to the CPU and it won't be hot without the fuse? It wouldn't be an indication of the steering lock status because it would always be hot as long as the relay was activated which the CPU already knows because it triggers the relay via the earth/ground feed above the blue arrow and the status of the lock is communicated by the other wires going from the steering lock to the CPU. As I said it is great that there appears to be no down sides, but it is also unusual for a circuit to include a feed like that if it isn't used. It could simply be for the CPU to know that the activation of the relay was successful, but without seeing the inside of the CPU or having access to the code there would be no way of knowing for sure.

SurfDog · 05-27-2012, 11:02 PM

I just bought my 09 370Z (assuming I have a failure prone lock)
Thanks a TON I was sweating this impending failure!!!

Baer383 · 05-27-2012, 11:16 PM

Quote:

Originally Posted by bdl99

But you agree that the blue arrow is an input to the CPU and it won't be hot without the fuse? It wouldn't be an indication of the steering lock status because it would always be hot as long as the relay was activated which the CPU already knows because it triggers the relay via the earth/ground feed above the blue arrow and the status of the lock is communicated by the other wires going from the steering lock to the CPU. As I said it is great that there appears to be no down sides, but it is also unusual for a circuit to include a feed like that if it isn't used. It could simply be for the CPU to know that the activation of the relay was successful, but without seeing the inside of the CPU or having access to the code there would be no way of knowing for sure.

Actually I don't see the blue arrow as a input from the S/L ,but as a CPU output to the S/L thats why when the fuse is removed the power is taken from that wire(fuse 48) and then no input is given to the S/L via that wire.And again there have been no issue and no codes.

Trips · 05-27-2012, 11:43 PM

Please remember this is the Tech Section and not the General Section so STAY ON TOPIC!

Back On Topic!

Like it has been said Good find

bdl99 · 05-27-2012, 11:51 PM

Quote:

Originally Posted by Baer383

Actually I don't see the blue arrow as a input from the S/L ,but as a CPU output to the S/L thats why when the fuse is removed the power is taken from that wire(fuse 48) and then no input is given to the S/L via that wire.And again there have been no issue and no codes.

I don't see it as either. It is an input from the relay to the CPU. The relay is activated by the wire above the blue arrow, completing the circuit and energizing the coil in the relay. 12V then flows from the fuse through the relay and in to the CPU and the S/L. 12V is fed to both the CPU and the S/L.

05-27-2012, 01:27 PM	#46 (permalink)
SPOHN A True Z Fanatic Join Date: Feb 2010 Location: Covington, GA Age: 46 Posts: 14,844 Drives: Waiting on next Z Rep Power: 221	Super epic. Great job Frank and Dai __________________

05-27-2012, 05:52 PM	#48 (permalink)
KaienZ34 A True Z Fanatic Join Date: Oct 2009 Location: LA. not L.a. Posts: 21,652 Drives: Z34 Tour/Sport Rep Power: 178	Damnit, i just paid for my bypass plug last night. I thought someone had tried the fuse removal first, as if seems like the easiest thing to do. __________________ *"These Violent Delights Have Violent Ends"* http://www.the370z.com/members/kaienz34-albums-z34.html

05-27-2012, 06:25 PM	#50 (permalink)
KaienZ34 A True Z Fanatic Join Date: Oct 2009 Location: LA. not L.a. Posts: 21,652 Drives: Z34 Tour/Sport Rep Power: 178	Cool deal thanks and reps to you and my lovely DAI..... __________________ *"These Violent Delights Have Violent Ends"* http://www.the370z.com/members/kaienz34-albums-z34.html

05-27-2012, 06:29 PM	#51 (permalink)
happytheman A True Z Fanatic Join Date: Apr 2010 Location: Florida Posts: 10,737 Drives: MB 6M Tour/Sport Z34 Rep Power: 1822	Looks like I've got some work to do. +rep __________________ --Brantly-- *PowderCoating by Mike/Stillen/PWJDM/Shine Auto/NST* GTR/Michelin /Fast Intentions/Evo-R/Mobil 1/Motul/Z1 https://facebook.com/CentralFloridaZClub

05-27-2012, 07:06 PM	#52 (permalink)
simota1 A True Z Fanatic Join Date: May 2009 Location: Dededo, Guam Posts: 6,642 Drives: solid red 370z 6mt Rep Power: 405	god damn it i sent the money for the harness last week __________________ *TOP SECRET/POWERHOUSE AMUSE/ARC/DAYTONA RACING/VARIS/MINES/GANADOR/J-LINE/WORK EMOTION CR KAI/GT SPEC/CARBON SIGNAL/ZOOM ENGINEERING/ CARBON FIBER ELEMENT/STILLEN/*

05-27-2012, 07:07 PM	#53 (permalink)
simota1 A True Z Fanatic Join Date: May 2009 Location: Dededo, Guam Posts: 6,642 Drives: solid red 370z 6mt Rep Power: 405	good find though guys __________________ *TOP SECRET/POWERHOUSE AMUSE/ARC/DAYTONA RACING/VARIS/MINES/GANADOR/J-LINE/WORK EMOTION CR KAI/GT SPEC/CARBON SIGNAL/ZOOM ENGINEERING/ CARBON FIBER ELEMENT/STILLEN/*

05-27-2012, 08:31 PM	#54 (permalink)
bdl99 Base Member Join Date: Oct 2010 Location: NJ Posts: 244 Drives: Nissan GT-R 2011 Rep Power: 15	Cool. Looking at the diagram, the only thing I noticed regarding the cut the wire vs pull the fuse approach is the point highlighted below. With the pull the fuse method the point highlighted with the blue arrow wont be powered going in to the CPU. I'm not saying it makes any difference, but when cutting the brown wire it is breaking the circuit further downstream and therefore that point will continue to be fed with power, where as removing the fuse it will not. Again not saying it makes any difference but would think that point serves some purpose, maybe just an error code?

05-27-2012, 11:02 PM	#57 (permalink)
SurfDog A True Z Fanatic Join Date: May 2012 Location: Colorado (9000 feet) Age: 56 Posts: 1,796 Drives: 09 6mt, 13 Sequoia, Rep Power: 15749	I just bought my 09 370Z (assuming I have a failure prone lock) Thanks a TON I was sweating this impending failure!!!

05-27-2012, 11:43 PM	#59 (permalink)
Trips Administrator Join Date: May 2009 Location: Disneyland, Ca Posts: 8,732 Drives: 🔰 Rep Power: 10	Please remember this is the Tech Section and not the General Section so STAY ON TOPIC! Back On Topic! Like it has been said Good find __________________

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Those of you who have had Steering Lock Failure	Thechidz	Nissan 370Z General Discussions	449	01-12-2013 06:05 PM
Fuel Starvation Problem Solved?	ResIpsa	Track / Autocross / Drifting / Dragstrip	7	03-01-2012 06:50 PM
Steering lock repair	fritz	DIY Section (Do-It-Yourself)	38	02-22-2012 10:30 PM
steering wheel lock	rosankyslim	Exterior & Interior	4	01-19-2012 04:43 PM
Rear hatch release problem solved!	BluZ	Australia/New Zealand	8	05-22-2010 02:42 AM