Glad to hear that the Innova 3100i was able to clear the error code.
Thank you for confirming it and sharing the info.

 

I have to give the OP lots of credit this works exactly as advertised. After changing out my Front lower control arms I had all theses lights on probably due to a variety of reasons. Needless to say this process cleared everything up.

 

I just finished installing a brand new actuator and pump assembly in my LS460(Both purchased directly through dealerships). I had the 4 ABS lights and check engine a few months back and finally my pump which was being over-worked gave out which forced me to replace everything. The problem I am having is with bleeding the rear brakes using techstream. I have gone through the process as follows :
- Zero Down Accumulator
- Disable ECB (ECB Invalid)
- Front and rear brake bleed after actuator replacement. The front was easy but the rears are not getting anything pumped through when the techstream says to open the RR and RL bleeders. I have tried multiple times.

The next step I found when searching was to reset the memory and linear value offset. So naturally now I am getting the code C1345. Has anyone else had issues bleading the rear brakes with Techstream. All help will be appreciated.

 

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Sorry to hear that the bleeding brake system didn't go well. Before I offer my suggestions, could you please tell us:
1) The model number of the brake actuator. Is it 44050-50170 or 44050-50130 or 04003-45450?
2) What version is your Techstream?
3) Did you go through each of the following steps with Techstream after zero down accumulator:------

 

Thank you for your response yyymmm31
1) The model number of the brake actuator is 44510-50090
2) I am using version 14.30.023 of Techstream.
3) Yes, I followed those instructions very closely and tried it 4 times so far repeating each step. When I get to the rear brake bleeding first section with the RR wheel there is no movement/pressure in the tube and same with the RL. I did also move on to the end of the bleeding process just in case but it always fails by the 2nd or 3rd round of lowering accumulator pressure.

 

What is your LS460 model year?

 

I have a 2008 LS460

 

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I have some uncertainty about your actuator part number. Lexus official US part store lists 44050-50170 for LS460, which is backwards compatible with and replaces several earlier part numbers beginning with 44050-50xxx (e.g., 44050-50130, 44050-50150). I couldn't find your actuator part number 44510-50090 for LS460 in the official Lexus US part store. It made me think that there could be a compatible issue. Could your actuator 44510-50090 be intended for LS460 sold outside US? Since you have the latest version of Techstream (14.30.x.x) which allows you to perform rear brake bleeding directly without having to manually lower the pump pressure, you may perform the passenger side rear brake bleeding which includes bleeding the new brake actuator (from Techstream screen, go to the brake bleeding screen, then select individual brake bleeding). Make sure that your car battery is fully charged before you do the RR brake bleeding. If you can successfully bleed RR brake (passenger side), you will have also successfully bled the new brake actuator (bleeding RR brake includes bleeding the brake actuator). Then, perform the individual bleeding procedure on the driver side rear (RL) brake. After successfully bleeding both RR and RL brakes individually, run the memory reset and re-calibration (linear value offset) procedures. By then, your brake system should have been restored. Another possible solution is that , assuming that your brake actuator 44510-50090 is intended for LS460 in European or Asian markets, you may set your Techstream region to Europe or Asia and try it to bleed the brake system again. However, I'd try individually bleeding the RR/RL brakes first because it is easier to do.
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Thank you for the response, I purchased the actuator from Bell Lexus in AZ last week. The box was up-opened and it (Box) had a part number of 44050-50110. The part number that I provided to you was the one printed on the actuator itself which is 44510-50090 which I was confused by as well. I tried the normal bleeding procedure and had the same results which was no pressure or fluid coming out of both the RR and RL bleeder valve. I even tried to vacuum pump both sides and successfully removed all of the fluid from the lines so now they only have air in them (Probably not a great decision).

I just switched the country to Europe and the computer seemed to respond in a similar way as with the US version. I just went the process with the US version again using all three brake bleeding methods and it still failed.

Just to be clear, when doing all of the bleeding processes the pump does activate for both the 40 second computer bleed (RR)(Bleeding after replacing actuator) and the RR & RL brake bleeding procedures, I also hear a faint clicking noise from under the hood which to me means that the valve is opening or closing properly. I am just not getting anything to the rear wheel bleeder screws. Does this sound like the new actuator may be bad?

 

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Bell Lexus is a reputable dealer. The chance for them to sell you a bad actuator is kind of small. If the package says it is 44050-50110, then 44510-50090 should be interchangeable with 44050-50110. Preferably, I'd like to have the latest 44050-50170 actuator. Since you heard the actuator respond to Techstream, it suggested that the actuator functioned to some degree. And you did the individual bleeding of RR and RL brakes and there was still no fluid coming out bleeder screws. Now, although it's unlikely, but did you verify the physical brake lines/tubes are connected correctly and are not somehow blocked? If the brake lines/tubes are connected correctly and are not somehow blocked, there is a reason to doubt if the actuator is a good one.
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I'm going to need some advice from this thread too. I'm in Arizona. I have 2 ls460's. Here are my brake actuator numbers, hopefully they help you guys.

2007 LS460 Runs, no issues. brake actuator number 44510-50070

2008 LS460 brakes not working. I'm trying to bring it back to life. I do not hear the brake booster motor come on at all. Brake actuator number 44510-50140

This car was a bank repo it has been sitting for 2 years. According to its service history 11 miles ago in 2018 a lexus dealer diagnosed it as a bad brake actuator. I was told someone may have changed the brake actuator with one from a salvage yard. The skid control computer does have some writing on it that looks as if it was perhaps from a parted out car. The car does run and drive. It does not stop easily. I drove it 10 scary miles to get emissions done in order to transfer the title. After driving the 10 miles I think only the left front brake is working the disc is fairly rust free. The 3 other brake discs still have surface rust.


Fault codes present. using techstream 12.xx
C1203 ecm communication circuit ( I'm not concerned with this one, I understand it's probably my laptop, I don't believe this code was on last night either)
C1252 Brake booster pump motor on time abnormally long
C1256 Accumulator low pressure
C1336 zero point calibration of deceleration sensor undone
C1345 Linear Solenoid Valve offset learning undone
C1392 Zero point calibration of stroke sensor undone

Any suggestions on where to start?
I did manage to reset the memory and run the test. My vsc / abs never did flash to indicate it was complete. The warning chime in the car did turn off for a while which was nice. I'm guessing I will need a new brake actuator and new booster pump motor.

With all of the faults should the brake booster motor have power going to it? I was going to check it for voltage with the engine on. I assume the fail safe for the car is to send power to it regardless.

 

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Before replacing any brake hardware, I'd first check if all the brake lines/connections are securely connected. Then, I'd reset the brake memory and re-calibrate the brake system (Linear Valve Offset Calibration) to see if the codes are cleared. If it doesn't clear the codes, I'd bleed the brake system with the "brake actuator replaced" procedure to verify if the brake actuator is indeed bad. You may also check the brake actuator pressure voltage. A functional brake actuator should have a voltage range of 3.2-4.0V. You can check the brake pressure voltage with the engine ignition at ON position (but not actually starting the engine). If the full bleeding doesn't restore the brake system and your brake actuator pressure is not in the normal voltage range, I'd replace the brake actuator unit.
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I really appreciate the help.

I was able to clear some of the codes following your instructions. I followed the "brake actuator replaced" procedure for brake bleeding the brakes. The rear brakes never pressurized bleeders were already open too . The front brakes I was able to go through the steps and bleed manually. I've never heard the brake pump motor turn on on this car.

Are the two wires with the arrows in this picture direct feed to the brake pump motor? I checked them with the car on. They have 14v dc. The motor is silent.

 

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Sorry to hear that your brake system couldn't be revived. Yes, those two wires are electric supply lines to the brake accumulator pump. Did you verify/check if your brake actuator pressure voltage with Techstream? If Techstream showed that your brake actuator pressure voltage is outside the range of 3.2-4.0v and with your observation that there was no brake pump sound throughout your brake bleeding process, it is most likely that your brake actuator is bad. If you are going to buy a new brake actuator, try to get one with part number 44050-50170, which is the most recent brake actuator used by several Lexus dealers for LS460.
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I am interested in 2010 LS460 upon test driving I believe it is starting to get that brake actuator systems because the ugly noise coming from underneath and soft brake (not brake squeak). The car still has 2 months left on the 10 years extension fix. The dealership actually put it into Lexus and Lexus did not find anything wrong with it and said brake lining is good, etc. Lexus says that the Dash Error message has to be present for them to replace. Is that true one has to get the message display?