Brake System Override Failure !!!
04-14-18, 10:44 AM
#1
Driver School Candidate
Thread Starter
Join Date: Dec 2015
Location: Fl
Posts: 26
Likes: 0
Received 0 Likes
on
0 Posts
Brake System Override Failure !!!
I turned on my car today and I got a check engine light and theres a message on my dashboard that reads Brake System Override Failure. Does anyone know what does that mean. My car also does not accelerate normally. Please help.
04-14-18, 12:20 PM
#2
Pole Position
Scan it with techstream or go to your local dealer. Its hard to say for sure without fault codes.
Your car is likely in limp home mode which would explain the acceleration.
Your car is likely in limp home mode which would explain the acceleration.
04-14-18, 02:28 PM
#4
Driver School Candidate
Thread Starter
Join Date: Dec 2015
Location: Fl
Posts: 26
Likes: 0
Received 0 Likes
on
0 Posts
Page 535 in the online owner's manual - looks like a trip to the dealer is in your future.
04-14-18, 02:38 PM
#5
Driver School Candidate
Thread Starter
Join Date: Dec 2015
Location: Fl
Posts: 26
Likes: 0
Received 0 Likes
on
0 Posts
04-14-18, 03:08 PM
#6
Pole Position
The tps is part of your throttle body or in it. But I highly recommend you get some fault codes before doing anything or jumping to conclusions. Just because that message is the same on the dash, does not necessarily mean you have the same fault code.
My best guess is that’s the braking system needs to see the correct tps signal for vacuum for the booster or something....idk haven’t actually had a chance to look into how the automated side of the braking system work
My best guess is that’s the braking system needs to see the correct tps signal for vacuum for the booster or something....idk haven’t actually had a chance to look into how the automated side of the braking system work
04-14-18, 03:23 PM
#7
Lexus Test Driver
Join Date: Feb 2017
Location: Richmond Hill, Ontario, Canada
Posts: 6,260
Received 1,737 Likes
on
1,370 Posts
The brake override system requires multiple signals to make it function.
In reality it's a software function of the Engine ECM...it looks at Accel Pedal position, brake pedal status, Engine RPM, Vehicle Speed, etc.
If anyone of those signals or systems go down, brake override will also be affected.
Without the trouble codes you are pretty much flying blind in terms of finding the faulty part.
And to the person that commented above, yes...the TPS is built into the Throttle body.
In reality it's a software function of the Engine ECM...it looks at Accel Pedal position, brake pedal status, Engine RPM, Vehicle Speed, etc.
If anyone of those signals or systems go down, brake override will also be affected.
Without the trouble codes you are pretty much flying blind in terms of finding the faulty part.
And to the person that commented above, yes...the TPS is built into the Throttle body.
Trending Topics
04-14-18, 03:32 PM
#9
Lexus Test Driver
Join Date: Feb 2017
Location: Richmond Hill, Ontario, Canada
Posts: 6,260
Received 1,737 Likes
on
1,370 Posts
Here is the diagnostic chart for that code. I hope it attaches to this message ok.
04-14-18, 03:54 PM
#10
Driver School Candidate
Thread Starter
Join Date: Dec 2015
Location: Fl
Posts: 26
Likes: 0
Received 0 Likes
on
0 Posts
Problem solved, it turns out because I was changing my battery last week (I did it on my garage never drove the car) I must done something wrong and blew a fuse. The fuse #10 I blew was ETCS located on the box engine compartment driver side. I replaced it now I can drive normally.
Thread
Thread Starter
Forum
Replies
Last Post
franklexus
LS - 5th Gen (2018-present)
12
08-11-24 09:32 AM