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Old 06-14-2019, 05:43 PM #16
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So I left the negative terminal unplugged over night, lights are still up there.

Attempted zero point calibration, no go.

I pulled the ECU fuse, attempted ZPC again, no go.

I attempted this work around but no go either.

I searched harder and found this thread with a similar issue to mine. traction light won't turn off

I'll keep researching and attempting, but it's not hurting anything right so I'm not gonna keep stressing about it for now. 4lo and 4hi works, locker work.
All I think I don't have is atrac, multi terrain select, and crawl control.

Maybe I'll make an appointment with the dealer in the next few weeks.
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Old 06-14-2019, 07:24 PM #17
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Quote:
Originally Posted by MyanRagahis View Post
So I left the negative terminal unplugged over night, lights are still up there.

Attempted zero point calibration, no go.

I pulled the ECU fuse, attempted ZPC again, no go.

I attempted this work around but no go either.

I searched harder and found this thread with a similar issue to mine. traction light won't turn off

I'll keep researching and attempting, but it's not hurting anything right so I'm not gonna keep stressing about it for now. 4lo and 4hi works, locker work.
All I think I don't have is atrac, multi terrain select, and crawl control.

Maybe I'll make an appointment with the dealer in the next few weeks.
So if you have done all of that, and still no ZPC ability then we need to actually see what DTCs are being presented. Do you have a copy of tech stream or a scanner to pull codes?

If the steering light is on I would be wondering about the steering angle sensor on the steering wheel clock spring. If your steering wheel is off and depending on where the slip cable is in the mechanism the steering ECU might not be happy. Again, pull the DTCs and then we can troubleshoot.
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Old 06-14-2019, 11:19 PM #18
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Quote:
Originally Posted by MyanRagahis View Post

"So I left the negative terminal unplugged over night, lights are still up there.

Attempted zero point calibration, no go.

..."
Well,

I took me several tries to calibrate the CP and YR too! I even moved the vehicle because the parking lot is not 100% level. Eventually I got it... AFTER I cleared the DTC using a techStream cable! You've gotta clear the history logs and temp files or else, N/G!

You don't need a techStream scanner to clear them. Just use one of the you-tube vids and follow; just be sure to find a good one, there are hundreds of bad info floating out, as you know! And Like @Old Red stated, you've gotta get the steering wheel straight and be sure that the alignment is dead on!

After that, you should be fine! 'Cheers',

rig!
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Old 06-16-2019, 12:20 AM #19
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Quote:
Originally Posted by flyrv9 View Post
Since the OP mentioned his steering wheel was not straight after the alignment, could this be the issue? Do the front wheels and steering wheel both have to be straight?
Hi flyrv9,

Yes! They must be straight, the truck must be level (within 1% of plumb), and shifter in park! If "Center point cali fails, even once (mine failed a few times during first tries), then DTCs "MUST be Cleared", or you cannot perform the YAW Rate acceleration cali, and the "Various Warning Icons" will stay lit-up!

rig, cheers!
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Last edited by rigtec; 06-16-2019 at 11:59 PM.
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Old 06-16-2019, 01:32 AM #20
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Thanks Rig - I thought so. I asked because besides being curious - I didn't want the OP trying to get this to work; when he had no chance, if this was off.
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Old 06-19-2019, 06:35 AM #21
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So update. Lights are still there. Not too bothersome. But they're there flashing. I just wanted to take a break from that headache and enjoy how smooth the ride has been since my LCAs and getting the alignment.

I'm ready to have more headaches now.

Again, 4hi, 4lo, diff lock, and actually a-trac (mentioned earlier I didn't have it) dash lights will work fine.
Although the slip indicator light is still solid on during any of these along with a blinking multi terrain, and that solid steering light.

I'm possibly visiting an off road park this weekend so I'll see what truly gets to work.

Maybe I'll make an appointment with the dealer next weekend. Ignoring the lights didn't seem to make it go away. I was hoping that attempt would have been the fix lol.

Quote:
Originally Posted by Old Red View Post
So if you have done all of that, and still no ZPC ability then we need to actually see what DTCs are being presented. Do you have a copy of tech stream or a scanner to pull codes?

If the steering light is on I would be wondering about the steering angle sensor on the steering wheel clock spring. If your steering wheel is off and depending on where the slip cable is in the mechanism the steering ECU might not be happy. Again, pull the DTCs and then we can troubleshoot.
I don't have a copy of Tech Stream but I've used my Dad's OBD reader as well as a friend of mine. Both were showing no codes. I'm also thinking the ECU just isn't happy at the moment. It's really driven just fine this past week and a half.
But I noticed something tonight, the indicator of my wheel direciton on the dash, isn't there. Super weird.
Video- YouTube

Quote:
Originally Posted by rigtec View Post
Well,

I took me several tries to calibrate the CP and YR too! I even moved the vehicle because the parking lot is not 100% level. Eventually I got it... AFTER I cleared the DTC using a techStream cable! You've gotta clear the history logs and temp files or else, N/G!

You don't need a techStream scanner to clear them. Just use one of the you-tube vids and follow; just be sure to find a good one, there are hundreds of bad info floating out, as you know! And Like @Old Red stated, you've gotta get the steering wheel straight and be sure that the alignment is dead on!

After that, you should be fine! 'Cheers',

rig!
Thanks for your help. Unfortunately I've tried multiple attempts to clear these DTCs, with no success.
Steering wheel and alignment couldn't be any better at this point. Also couldn't be happier with the alignment.

Quote:
Originally Posted by flyrv9 View Post
Thanks Rig - I thought so. I asked because besides being curious - I didn't want the OP trying to get this to work; when he had no chance, if this was off.
Thanks for your input. My wheels were straight after the alignment. It was only before that it wasn't. I've successfully done the ZPC twice in my driveway before. There's something else affecting it all. I do feel I have no chance at fixing this at the moment lol.
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Old 06-19-2019, 11:34 AM #22
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Quote:
Originally Posted by MyanRagahis View Post
So update. Lights are still there. Not too bothersome. But they're there flashing. I just wanted to take a break from that headache and enjoy how smooth the ride has been since my LCAs and getting the alignment.

I'm ready to have more headaches now.

Again, 4hi, 4lo, diff lock, and actually a-trac (mentioned earlier I didn't have it) dash lights will work fine.
Although the slip indicator light is still solid on during any of these along with a blinking multi terrain, and that solid steering light.

I'm possibly visiting an off road park this weekend so I'll see what truly gets to work.

Maybe I'll make an appointment with the dealer next weekend. Ignoring the lights didn't seem to make it go away. I was hoping that attempt would have been the fix lol.



I don't have a copy of Tech Stream but I've used my Dad's OBD reader as well as a friend of mine. Both were showing no codes. I'm also thinking the ECU just isn't happy at the moment. It's really driven just fine this past week and a half.
But I noticed something tonight, the indicator of my wheel direciton on the dash, isn't there. Super weird.
Video- YouTube



Thanks for your help. Unfortunately I've tried multiple attempts to clear these DTCs, with no success.
Steering wheel and alignment couldn't be any better at this point. Also couldn't be happier with the alignment.


Thanks for your input. My wheels were straight after the alignment. It was only before that it wasn't. I've successfully done the ZPC twice in my driveway before. There's something else affecting it all. I do feel I have no chance at fixing this at the moment lol.
See, the lack of the wheel position display in the cluster tells me the steering angle sensor is not communicating on the CAN Bus. Where the steering wheel and clock spring cable are in the amount of rotations is how the sensor determines the angle of the wheels. I believe the cable allows 5 full 360 degree rotations from center to full lock in left and right, but if the wheel was off due to the lift, then the center changed, and itís possible that when you turned the wheel the ribbon cable inside the clock spring might have been damaged. If you take it to the dealer let us know what they find, but my money is on the clock spring and steering sensor assembly.
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Old 06-19-2019, 11:15 PM #23
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Quote:
Originally Posted by MyanRagahis View Post

"...Maybe I'll make an appointment with the dealer next weekend. Ignoring the lights didn't seem to make it go away. I was hoping that attempt would have been the fix lol...

...Steering wheel and alignment couldn't be any better at this point. Also couldn't be happier with the alignment... I've successfully done the ZPC twice in my driveway before. There's something else affecting it all. I do feel I have no chance at fixing this at the moment lol."
Hi MyanRagahis,

Please listen...

you'll "NEVER" get the truck back online until you have a "Proper alignment"; you've replaced the LCA's so the steering needs to be properly corrected; Zero Point and YAW rate may be completely off; compared to factory settings, and the ecu's know that!

And I know that you (likely) have a few DTC's being stored... that's why you can't get the "Steering and other related ecu's to function correctly"! I hate to see you go through this (unnecessarily); but there's a protocol involved here and it's NOT been met!

You'll enjoy your truck a lot more after that's all fixed! 'Best to you',

rig
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Old 06-20-2019, 12:07 AM #24
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If the truck has to be within 1% of plumb, then how and where is this measured? If the OP did the ZPC twice in his driveway and knowing most all driveways are sloped for drainage; I'm curious. I'm familiar with leveling airplanes to do certain alignments. They have a target mounted for a plum bob to reference - so I was wondering if there is a target or reference marker somewhere placed by Toyota for future adjustments on our vehicles.

That way one could know the vehicle was level before attempting alignments like the ZPC. Even siting in the vehicle would exceed 1% of level / plumb unless jacks were used.
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Old 07-03-2019, 02:40 PM #25
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Update

Quote:
Originally Posted by Old Red View Post
See, the lack of the wheel position display in the cluster tells me the steering angle sensor is not communicating on the CAN Bus. Where the steering wheel and clock spring cable are in the amount of rotations is how the sensor determines the angle of the wheels. I believe the cable allows 5 full 360 degree rotations from center to full lock in left and right, but if the wheel was off due to the lift, then the center changed, and it’s possible that when you turned the wheel the ribbon cable inside the clock spring might have been damaged. If you take it to the dealer let us know what they find, but my money is on the clock spring and steering sensor assembly.
You hit it head on. Took it to Toyota Saturday and the diagnosis was needing a new spiral cable and steering angle sensor along with alignment. Dropped it off yesterday morning and got it back an hour ago.
The dealer experience was pleasant really. Sucks installing new parts got me into this but it is what it is. It's fixed and I'm happy.
Thanks for the help everyone!
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Old 07-03-2019, 02:49 PM #26
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Take it to the dealer.

I have issues with zero point calibration after suspension work over the years and I have never been able to get the procedure to work correctly.
Your dealer will have a proper tool rather than a jumper wire, and it should be quick and cheap.
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