Fixed tranny but….

[airforce1]

We have a ‘08 LX570 with 93K miles. We are the 3rd owners.

I posted a thread awhile back but our LX developed intermittent then gradually persistent transmission issues for the past 2 yrs where we mainly experienced a delay in engaging in reverse. We accepted it would eventually need a tranny rebuild.

The problem progressed later where we experienced intermittent issues shifting into 4th gear and it would hold in 3rd and occurred mostly in the morning. Sufficient warming of vehivle would make it go away.

On the occasion when it struggled to get into 4th, we got an immediate VSC, PCS, stability control, and ABS light that would not go away or cannot reset with a code reader.

Transmission is now thankfully fixed and now shifts smooth like butter. Thinking the fixed transmission would clear the error lights, we are unfortunately getting the dash light warning lights. No cigar with Unplugging battery.

I have attached the error codes (ignore the airbag codes since selt belt tensioner and SRS light has been repaired under Toyota TSB).

We have been told it can be anything from a faulty speed sensor, faulty ABS, faulty cruise control distance sensor to faulty H4/L4 actuator.

Is it a coincidence that these fault codes occurred while the tranny was faulty or am I looking at something more sinister?

Thanks!

 

[Lester did that]

That might be just a coincidence. Check your ABS sensors. B2060 could be the seat belt sensors reacting to a faulty ABS sensor. The seat belt sensors react to the ABS system which is part of the traction control system. might also throw the airbag codes as well. I would start there. It's usually a plug and play fix.

 

[airforce1]

That might be just a coincidence. Check your ABS sensors. B2060 could be the seat belt sensors reacting to a faulty ABS sensor. The seat belt sensors react to the ABS system which is part of the traction control system. might also throw the airbag codes as well. I would start there. It's usually a plug and play fix.

So for someone not mechanically inclined, how do I check or troubleshoot the ABS sensor?

 

[Lester did that]

The simplest way is a robust scan tool like TechStream. It reads everything and can isolate individual sensors in a system. It's a bit much for the average user. It's expensive, a learning curve and you need to know what the numbers mean that it is giving you. Almost every decent mechanic has it. Or something very similar. Take it into a good indy shop you trust and they will charge you 1 hour. They will isolate the issue. Ask them for the print out. Sometimes if you go with the shop that did the diagnostics to do the fix they will waive that fee.

Then you can figure out for self if you want to do the work. My bets are its a simple sensor some where. I had a $88 sensor go bad a month ago and the dash was a christmas tree and you would think if you looked at it the motor was going to fail and loose breaks.

 

[Ossy]

I was having issues with engaging 4lo and going back to 4hi on my 2008 LC with 122k, and I had the same C1268 code. I can't say for sure, but it might be related to the transfer case actuator, they seem to be problematic on these 200s. I have seen that the c1268 code usually pops up with transfer case actuator issues.

 

[bentonrover]

How's your ground strip looking?

 

[Lester did that]

How's your ground strip looking?

This actually solved an issue I had a while back. $10 five minute fix. Took me longer to dig out ratchet. I did not get any error codes but it would get stuck in 4L. I looked under and the strap was torn off. Must have been a rouge stick. Never an issue since.

 

[airforce1]

Sorry but what’s a ground strap?

 

[Lester did that]

It's a metal braided strap. It serves the same function as the ground in an extension cord. The thing is LC's get real weird when things aren't grounded. You will see it right away if you look underneath at the transfer case from the driver side. Yours probably is black.

 

[Sandroad]

Sorry but what’s a ground strap?

They provide a path for the electricity to get back to the negative terminal of the battery through the body or frame of the vehicle. An example is the one fastened to the fender/frame next to the negative terminal of the battery in the engine compartment. A vehicle has many of them to provide good paths (grounds) to the negative terminal of the battery to complete electrical circuits. If any are loose/broken/corroded, the devices they serve won't work right.

 

[Lester did that]

They provide a path for the electricity to get back to the negative terminal of the battery through the body or frame of the vehicle. An example is the one fastened to the fender/frame next to the negative terminal of the battery in the engine compartment. A vehicle has many of them to provide good paths (grounds) to the negative terminal of the battery to complete electrical circuits. If any are loose/broken/corroded, the devices they serve won't work right.

That is the simplest to the point explanation I've heard.

 

[CharlieS]

I think the one being discussed may be the one from the transfer case to the body.

 

[Lester did that]

I would still go back and check the ABS sensors and start there. The ground strap was a little off topic to the OP but worth looking at.

 

[grinchy]

Note that electrons are negative and the actual flow of electrons is from negative to positive so if there is a bad ground things can’t even get started.
Helps to emphasize how important grounds are.

 

[Lester did that]

Note that electrons are negative and the actual flow of electrons is from negative to positive so if there is a bad ground things can’t even get started.
Helps to emphasize how important grounds are.

Yep. Very simple visual inspection for the ground strap. It's like replacing the gas cap first for EVAP codes.

 

[airforce1]

OK guys, I'll check the ground strap tonight an report back.

I went to a shop that had a more advanced code reader (Genisys Evo) and it gave the following codes info:

B2060 - ABS, secondary system SMART KEY - 3.5L
C1268 Transfer L4 Position Circuit Switch.

Anyone know what the ABS smart key secondary system is? Thanks for all the help so far everyone.