tiger4life

iTrader: (16)

I have been searching on here and google all night (really all night) trying to figure out how to zero point calibrate my 1999 gs 300. Anyone have a manual for a 99 that explains how to do this? I'm trying to figure out if there is a manual procedure or if it's scan tool only. I have been planning to purchase a repair manual but have been unable to find one for a 99. Waiting on one to pop up on ebay.

I have read the technical bulletin that says that you can jump the TS and CG pins on the DCL3 connector. The problem is the bulletin is for a 2004. My 99 only has 4 pins on that connector. I have pin 4, CG (COMMON GROUND), but not TS. My factory electrical diagram for a 99 confirms this.

Before someone says stop being cheap and bring it to the dealer:
1. The local Toyota dealer says that their computers can't communicate with Lexus. They're probably wrong since they probably have techstream, but this shows their competence level.
2. The nearest Lexus dealer is 1.5 hours away with some interstate travel so I'd rather not do that to be safe.

Starting to think my next best option will be to buy a bootleg techstream and try to clear it myself. I would rather not, but the lack of competent mechanics around me is forcing me to take matters in my own hands.

clos430

iTrader: (21)

What dtc are you getting ? How do you know that's what you need ?

tiger4life

iTrader: (16)

Never had any codes or lights for this problem. I just finished ohm testing all of the abs speed sensors and they are pretty much in spec (1.7 kOhms). This all started around the time I installed my wood wheel. I must have rotated the new wheel a few teeth. Never got the slip indicator in the 1st 5 years of owning it. Most of the times abs activates is when I'm turning. The car is confused with where it thinks the steering wheel is versus what the yaw rate sensor is telling it. If zero point isn't the problem, the only other culprit would be the yaw rate sensor. But since this started when I changed the wheel, I'm pretty sure it just needs the calibration. I really hope someone can take the time to help me out with my question. I know we still have some knowledgeable members on here.

clos430

iTrader: (21)

Oh that makes sense, yeah most likely you did rotate the steering a little too much. From what I remember you can only do it with the techstream/lexus scantool. I'll try to see if I can look something up at work tomorrow and get back to you.

tiger4life

iTrader: (16)

If you can let me know something, that would be great. I know for the 04 (or any lexus/toyota with TS and CG pins) you can do it with a paperclip.

clos430

iTrader: (21)

Give this a shot, disconnect the battery( - side ) center your steering wheel and then remove it. Try to center the spiral cable.

2.5 turns to the left
Back to the center
2.5 turns to the right
Back to the center
Make sure it's right in the center and reinstall your steering wheel and connect the battery. Drive the car and see if that fixes it.

tiger4life

iTrader: (16)

Thanks for the info. I broke down and took it to the Toyota dealer this morning. Yesterday they told me it was $90 but they didn't think they couldn't do it on a Lexus. I had to show up with documentation showing they could do it. They don't understand their own equipment capabilities well enough I guess. Then the bill came out to $110 ($6 of which was for shop supplies, wtf????????).

I pushed the car a little and the abs activated. I'll have to drive the car some more to figure out if it's still malfunctioning or acting normal. In the meantime I bought a used yaw rate sensor and a techstream.

tiger4life

iTrader: (16)

Also I don't even know if they did it totally correct because I remember the procedure saying to disconnect and re-connect the battery before calibrating the sensor. When I got in the car, the touchscreen radio was on the same station I left it on and I'm pretty sure they wouldn't have bothered to reprogram that.

clos430

iTrader: (21)

When you do the calibration with the tech stream you don't have to disconnect the battery. So they said they did do it ? And when you were driving back the lights still came on ?

tiger4life

iTrader: (16)

No they didn't disconnect the battery. Your car looks nice with the Q45's btw.

Yes it did. It didn't trigger on fast straight line acceleration though. It's done that before. It did it when I turned a little quick at a traffic light. Maybe it was the slight bumpiness, I don't know. I'm just going to have to drive it more because this car will go a couple days without triggering it and then it will do it for a couple days on simple turns.

Yaw rate sensor was like $9 bucks so I'll wait until that and my bootleg techstream get here. If it triggers some more I'll try to install the new yaw rate sensor and hopefully the techstream can calibrate it.

tiger4life

iTrader: (16)

I don't mind paying the dealer for their service, but I'm not confident in this particular dealer fixing my problem. They're not motivated, they have business whether or not I patronize them.

clos430

iTrader: (21)

Thanks for the compliment I appreciate bro.

Hopefully replacing the yaw rate fixes your problem. If it doesn't, try what I recommended up above.

tiger4life

iTrader: (16)

Will do if the problem comes back. I got on some more this afternoon and it hasn't triggered. I'm being cautious because it's gone away before and come back. Hopefully the zero point calibration has solved the problem.

tiger4life

iTrader: (16)

Good news: my back up yaw rate sensor got here

Bad news: Traction control kicked in again

I guess I need to wait on my techstream now.