User Tag List

Reply
 
Thread Tools Rate Thread Display Modes
Old 08-13-2022, 09:46 AM #46
rwh963 rwh963 is offline
Member
 
Join Date: May 2017
Location: MA
Posts: 789
rwh963 has a spectacular aura about rwh963 has a spectacular aura about
rwh963 rwh963 is offline
Member
 
Join Date: May 2017
Location: MA
Posts: 789
rwh963 has a spectacular aura about rwh963 has a spectacular aura about
also, looks like a useful document: Error Codes TOYOTA & SELF-DIAGNOSTICS - Wiring Diagrams
rwh963 is offline   Reply With QuoteReply With Quote
Old 08-13-2022, 05:51 PM #47
Jakeepoo3's Avatar
Jakeepoo3 Jakeepoo3 is offline
Member
 
Join Date: Sep 2021
Location: Fayetteville AR
Posts: 776
Jakeepoo3 has a spectacular aura about Jakeepoo3 has a spectacular aura about Jakeepoo3 has a spectacular aura about
Jakeepoo3 Jakeepoo3 is offline
Member
Jakeepoo3's Avatar
 
Join Date: Sep 2021
Location: Fayetteville AR
Posts: 776
Jakeepoo3 has a spectacular aura about Jakeepoo3 has a spectacular aura about Jakeepoo3 has a spectacular aura about
Quote:
Originally Posted by rwh963 View Post
jp3, looking at your toyota service manual link, looks like it is purely ABS (VSC is on just because of ABS). for ABS then, we have: 1421, 1422, 1423, 1424.
That makes sense. All those codes relate to the master cylinder pressure sensor and master cylinder pressure control sensor. So you would want to test that circuit and the sensors.
Attached Images
Anyone replace ABS Control Module/Brake Booster??-screenshot_20220813-164417~2-jpg 
Jakeepoo3 is offline   Reply With QuoteReply With Quote
Old 08-13-2022, 06:59 PM #48
rwh963 rwh963 is offline
Member
 
Join Date: May 2017
Location: MA
Posts: 789
rwh963 has a spectacular aura about rwh963 has a spectacular aura about
rwh963 rwh963 is offline
Member
 
Join Date: May 2017
Location: MA
Posts: 789
rwh963 has a spectacular aura about rwh963 has a spectacular aura about
are those replaceable parts? jus,ped on a toyota part site and came up empty. bad feeling they are imbedded in the master cylinder assembly.

Last edited by rwh963; 08-13-2022 at 08:32 PM.
rwh963 is offline   Reply With QuoteReply With Quote
Old 08-15-2022, 09:45 AM #49
Jakeepoo3's Avatar
Jakeepoo3 Jakeepoo3 is offline
Member
 
Join Date: Sep 2021
Location: Fayetteville AR
Posts: 776
Jakeepoo3 has a spectacular aura about Jakeepoo3 has a spectacular aura about Jakeepoo3 has a spectacular aura about
Jakeepoo3 Jakeepoo3 is offline
Member
Jakeepoo3's Avatar
 
Join Date: Sep 2021
Location: Fayetteville AR
Posts: 776
Jakeepoo3 has a spectacular aura about Jakeepoo3 has a spectacular aura about Jakeepoo3 has a spectacular aura about
Quote:
Originally Posted by rwh963 View Post
are those replaceable parts? jus,ped on a toyota part site and came up empty. bad feeling they are imbedded in the master cylinder assembly.
They are inside the abs control valve/pump assembly, unfortunately. I've never rebuilt one myself but I'm sure that's an option. There could be a problem in the actual wiring/circuit outside of the abs assembly. (Short circuit, open ground, loose connector pin) That's what I would hope for. If you feel like it you can test the circuitry to make sure you're getting a signal from the pressure sensor to see if it's working or if the stop lamp circuit is out of whack.

Last edited by Jakeepoo3; 08-15-2022 at 10:08 AM.
Jakeepoo3 is offline   Reply With QuoteReply With Quote
Old 08-16-2022, 01:12 PM #50
alia176 alia176 is offline
Senior Member
 
Join Date: Jan 2015
Location: East Mountains, NM
Posts: 1,210
alia176 will become famous soon enough alia176 will become famous soon enough
alia176 alia176 is offline
Senior Member
 
Join Date: Jan 2015
Location: East Mountains, NM
Posts: 1,210
alia176 will become famous soon enough alia176 will become famous soon enough
Quote:
Originally Posted by rwh963 View Post
long time issue here. took 4runner (2007 230k v6 4wd one owner) to the dealer in March. after $300 in diagnostics, they determined my issue is with the ABS control module back feeding into the system.

PLEASE REFERENCE THREAD: Brake lights constantly on?

afterwards, i examined the plastic encased module and noticed impact backs in the case. very weird. did it let in moisture for years and damage the computer boards?? no idea what happened.

since, been trying to figure if there is an alternative answer. even at discount, a new module is about $800 (P/N 47217-35010), new Master cylinder with booster is $1200 (P/N 47025-35070). add labor to that.

backstory: the original master /abs module was replaced any about 111k miles because of constant squealing. put in a used unit that had about 70k miles on it. things were fine until the past year or so (based on people telling me my brake lights are constantly on).

so, after several months, i'm am considering biting the bullet and replacing the unit again. now, i'm wondering how common this issue is. i think economically the best bet is to go with a used unit that includes the master cylinder ($1200 part), and having it independently installed. maybe three hours labor charge. probably in over $500. it is a crapshoot. i'm having to go on the dealer's conclusion. could be wrong.

does anyone have experience with these units, and their installation?
My aplogies for not reading the entire thread but I can add something. I picked up an used unit from a buddy who owns a 100 series LC and it matches mine. The only thing that wears out, from what I can tell, is the motor brushes and bearing. The motor is constantly pressurizing the brake system so it makes sense that those two items would wear out. I suppose the solenoid valve is also an wear item but they're not operating on a continuous duty cycle. Besides, they're just stupid on/off valves which aren't typically known to fail. Perhaps a piece of debris in the brake fluid would prevent a valve from closing shut completely but that's a stretch.

I took apart the spare unit and noticed the brushes weren't that worn down. You might recall that the motor sits vertically and the bearing that sits at the bottom had way more crud fell on top of it. Someday, I may replace both bearings and brushes, clean up the commutator then put it back on the shelf as a spare but good unit.

I'm disappointed that I didn't more pics but I have a pic of the actual motor shaft bearing for future reference.

I guess the moral of the story is if you have your spare motor, take it apart and see what's up. The chances of an electronic part like an ECU going bad is close to zero. Toyota simply makes robust parts that lives a long time.

I hope this helps!
Attached Images
Anyone replace ABS Control Module/Brake Booster??-4runner-abs-motor-bearing-pic-jpg 
__________________
2003 Sport V8 Icon 2" rear, Bilstein 6112 front with 700# king springs, Gibson cat back, Magnaflow cross pipe. OBA, DIY sliders, etc
1996 FZJ80 landcruiser with whole bunch of stuff, including a Turbo.
1997 4Runner SR5 - daughter's ride, slowly getting built up

Last edited by alia176; 08-16-2022 at 02:44 PM.
alia176 is offline   Reply With QuoteReply With Quote
Old 08-16-2022, 01:16 PM #51
alia176 alia176 is offline
Senior Member
 
Join Date: Jan 2015
Location: East Mountains, NM
Posts: 1,210
alia176 will become famous soon enough alia176 will become famous soon enough
alia176 alia176 is offline
Senior Member
 
Join Date: Jan 2015
Location: East Mountains, NM
Posts: 1,210
alia176 will become famous soon enough alia176 will become famous soon enough
Quote:
Originally Posted by Jakeepoo3 View Post
Those sensors within the master are actually the ones that signal the stop lamps on or off when they detect hydraulic pressure within range. I believe I posted that diagnostic procedure already also.
This is a VERY interesting statement. While I was wheeling with my daughter who was behind me, she did say that the brake lights were coming on when ATRAC was doing its thing. I asked her on the radio if they were coming on and she confirmed it.

Now I know how the system knew when to activate the rear brake lights.

Thank you for this!
__________________
2003 Sport V8 Icon 2" rear, Bilstein 6112 front with 700# king springs, Gibson cat back, Magnaflow cross pipe. OBA, DIY sliders, etc
1996 FZJ80 landcruiser with whole bunch of stuff, including a Turbo.
1997 4Runner SR5 - daughter's ride, slowly getting built up
alia176 is offline   Reply With QuoteReply With Quote
Old 08-16-2022, 06:04 PM #52
rwh963 rwh963 is offline
Member
 
Join Date: May 2017
Location: MA
Posts: 789
rwh963 has a spectacular aura about rwh963 has a spectacular aura about
rwh963 rwh963 is offline
Member
 
Join Date: May 2017
Location: MA
Posts: 789
rwh963 has a spectacular aura about rwh963 has a spectacular aura about
Quote:
Originally Posted by Jakeepoo3 View Post
They are inside the abs control valve/pump assembly, unfortunately. I've never rebuilt one myself but I'm sure that's an option. There could be a problem in the actual wiring/circuit outside of the abs assembly. (Short circuit, open ground, loose connector pin) That's what I would hope for. If you feel like it you can test the circuitry to make sure you're getting a signal from the pressure sensor to see if it's working or if the stop lamp circuit is out of whack.
so, if you are a betting man, it sounds like you would put your money on needing to replace the complete unit (master cylinder/module), which is what was done at 111k miles with a used unit w/85k? that would put me back to the beginning, and basically back to the dealer diagnostic of abs module failure. the module being $800 and the whole unit being $1200, they say they typically just replace the whole thing.

that puts me back to hunting for a low mileage unit that either an independent or dealer would install (i've had luck labor matching). looking at $700-$800.
rwh963 is offline   Reply With QuoteReply With Quote
Old 08-17-2022, 04:35 PM #53
Jakeepoo3's Avatar
Jakeepoo3 Jakeepoo3 is offline
Member
 
Join Date: Sep 2021
Location: Fayetteville AR
Posts: 776
Jakeepoo3 has a spectacular aura about Jakeepoo3 has a spectacular aura about Jakeepoo3 has a spectacular aura about
Jakeepoo3 Jakeepoo3 is offline
Member
Jakeepoo3's Avatar
 
Join Date: Sep 2021
Location: Fayetteville AR
Posts: 776
Jakeepoo3 has a spectacular aura about Jakeepoo3 has a spectacular aura about Jakeepoo3 has a spectacular aura about
Quote:
Originally Posted by rwh963 View Post
so, if you are a betting man, it sounds like you would put your money on needing to replace the complete unit (master cylinder/module), which is what was done at 111k miles with a used unit w/85k? that would put me back to the beginning, and basically back to the dealer diagnostic of abs module failure. the module being $800 and the whole unit being $1200, they say they typically just replace the whole thing.

that puts me back to hunting for a low mileage unit that either an independent or dealer would install (i've had luck labor matching). looking at $700-$800.
Yeah, it sucks bud, that vicious cycle. I don't know anything about dealing with a mechanic or labor costs.. after confirming it's 100% not something simple in the circuitry it's a tough call for you.
Jakeepoo3 is offline   Reply With QuoteReply With Quote
Old 08-18-2022, 08:51 AM #54
rwh963 rwh963 is offline
Member
 
Join Date: May 2017
Location: MA
Posts: 789
rwh963 has a spectacular aura about rwh963 has a spectacular aura about
rwh963 rwh963 is offline
Member
 
Join Date: May 2017
Location: MA
Posts: 789
rwh963 has a spectacular aura about rwh963 has a spectacular aura about
well, i'm no worse off in a way. the issue is not affecting my drivability. but needs to be fixed. i'll shop for a good used unit first. there may be some decent resale value in mine to offset that expense.

good news, i don't have a car payment, so that saves $3-400/month.

need new tires, pre-mature wear. called the place i purchased from (discount tire direct). they, without question, helped me achieve a nearly $100/tire credit, so ordered new set for $400. so that saves some $$.

front brakes and outside CV axle on the list.

also, for the past several days the acceleration hesitation has not appeared. not sure if it has anything to do with topping off the fuel tank for the first time in a long time. thoughts on that?
rwh963 is offline   Reply With QuoteReply With Quote
Old 08-18-2022, 12:43 PM #55
alia176 alia176 is offline
Senior Member
 
Join Date: Jan 2015
Location: East Mountains, NM
Posts: 1,210
alia176 will become famous soon enough alia176 will become famous soon enough
alia176 alia176 is offline
Senior Member
 
Join Date: Jan 2015
Location: East Mountains, NM
Posts: 1,210
alia176 will become famous soon enough alia176 will become famous soon enough
Quote:
Originally Posted by rwh963 View Post
well, i'm no worse off in a way. the issue is not affecting my drivability. but needs to be fixed. i'll shop for a good used unit first. there may be some decent resale value in mine to offset that expense.

good news, i don't have a car payment, so that saves $3-400/month.

need new tires, pre-mature wear. called the place i purchased from (discount tire direct). they, without question, helped me achieve a nearly $100/tire credit, so ordered new set for $400. so that saves some $$.

front brakes and outside CV axle on the list.

also, for the past several days the acceleration hesitation has not appeared. not sure if it has anything to do with topping off the fuel tank for the first time in a long time. thoughts on that?
Not sure if you read my reply up above but see if it's the motor that's the issue. Perhaps the brushes have worn down too much?

Anyway, I feel your frustrations amigo.
__________________
2003 Sport V8 Icon 2" rear, Bilstein 6112 front with 700# king springs, Gibson cat back, Magnaflow cross pipe. OBA, DIY sliders, etc
1996 FZJ80 landcruiser with whole bunch of stuff, including a Turbo.
1997 4Runner SR5 - daughter's ride, slowly getting built up
alia176 is offline   Reply With QuoteReply With Quote
Old 08-18-2022, 04:41 PM #56
rwh963 rwh963 is offline
Member
 
Join Date: May 2017
Location: MA
Posts: 789
rwh963 has a spectacular aura about rwh963 has a spectacular aura about
rwh963 rwh963 is offline
Member
 
Join Date: May 2017
Location: MA
Posts: 789
rwh963 has a spectacular aura about rwh963 has a spectacular aura about
Quote:
Originally Posted by alia176 View Post
Not sure if you read my reply up above but see if it's the motor that's the issue. Perhaps the brushes have worn down too much?

Anyway, I feel your frustrations amigo.
hello,

yes, i did see your contribution. i'm not sure what you are suggesting. it looks like the alternator? does this have something to do with the master cylinder unit and brake lights?
rwh963 is offline   Reply With QuoteReply With Quote
Old 08-18-2022, 05:15 PM #57
alia176 alia176 is offline
Senior Member
 
Join Date: Jan 2015
Location: East Mountains, NM
Posts: 1,210
alia176 will become famous soon enough alia176 will become famous soon enough
alia176 alia176 is offline
Senior Member
 
Join Date: Jan 2015
Location: East Mountains, NM
Posts: 1,210
alia176 will become famous soon enough alia176 will become famous soon enough
Quote:
Originally Posted by rwh963 View Post
hello,

yes, i did see your contribution. i'm not sure what you are suggesting. it looks like the alternator? does this have something to do with the master cylinder unit and brake lights?
No sir, that pic is of the actual ABS motor! I took my spare one apart and made the observations I listed in the post.

Anyway, might be worth a shot!
__________________
2003 Sport V8 Icon 2" rear, Bilstein 6112 front with 700# king springs, Gibson cat back, Magnaflow cross pipe. OBA, DIY sliders, etc
1996 FZJ80 landcruiser with whole bunch of stuff, including a Turbo.
1997 4Runner SR5 - daughter's ride, slowly getting built up
alia176 is offline   Reply With QuoteReply With Quote
Old 12-01-2023, 02:29 PM #58
Cb2003runner Cb2003runner is offline
Junior Member
 
Join Date: Dec 2023
Location: Long Beach
Posts: 1
Cb2003runner is on a distinguished road
Cb2003runner Cb2003runner is offline
Junior Member
 
Join Date: Dec 2023
Location: Long Beach
Posts: 1
Cb2003runner is on a distinguished road
Unhappy 2003 Toyota 4runner abs brake system

So I was driving and all of a sudden the ABS and brake lights came on along with a high pitched alarm (my VSC trac light has also been for a minute) . I pulled off the road and when backing up so tow truck driver could pick up the vehicle the brakes got super stiff like I was driving a car from the 70s. My question is should I just have the whole ABS brake pump/motor/module replaced because it seems more like a headache to try to figure out what the individual problem is within the system?
Cb2003runner is offline   Reply With QuoteReply With Quote
Old 12-03-2023, 04:28 AM #59
toyo's Avatar
toyo toyo is offline
Member
 
Join Date: Nov 2003
Location: Cumming, GA
Posts: 904
Real Name: Steven
toyo will become famous soon enough
toyo toyo is offline
Member
toyo's Avatar
 
Join Date: Nov 2003
Location: Cumming, GA
Posts: 904
Real Name: Steven
toyo will become famous soon enough
Quote:
Originally Posted by Cb2003runner View Post
So I was driving and all of a sudden the ABS and brake lights came on along with a high pitched alarm (my VSC trac light has also been for a minute) . I pulled off the road and when backing up so tow truck driver could pick up the vehicle the brakes got super stiff like I was driving a car from the 70s. My question is should I just have the whole ABS brake pump/motor/module replaced because it seems more like a headache to try to figure out what the individual problem is within the system?
If you can swing the expense just replace the entire unit and be done with it. I'm telling ya now, if you have never flushed the brake fluid or the fluid is dirty then the brake booster assembly is going to fail. The accumulator and it's accompanying o-ring doesn't like dirty brake fluid.

As a side note a few years ago i was getting all kinds of ABS/TRAC etc codes. I went thru every diagnostic procedure from Toyota several times over the few months and every time it all passed. I ended up replacing my brake light switch and I'll be damn I have never had the issue again. Thankfully this was on my personal vehicle and not a customers vehicle. I have replaced many of these booster assemblies over the years and i disassemble each defective unit. I always will find some type of contaminates inside the unit. There are very small passage ways that the fluid travels thru and it doesn't take much for it to get clogged. Once a part of the system gets clogged or such it wreaks havoc on that entire unit.

I have a repair shop in which 90% of my work is Toyota/Lexus vehicles. My UPS driver came to me one day and said his mom's Solara has an issue to where she will be driving it and it will just start to come to a crawl like the brakes are being applied. No pattern to when it would do it, just out of the blue. Of course this is not something you want your car to do and she got to the point that she didn't want to drive it anymore. She had taken it to several dealers and independent shops with all different kind of repairs but nothing fixed the issue. I ended up buying that car for an extremely good price as she was very frustrated with it. It was a convertible and in mint shape. I went on several test drives and finally it acted up with me. That damn thing would literally start slowing down like the brakes were being applied until it would not move at all. When my tow guy got to me it moved just fine while we loaded it up. I got back to the shop and ordered a new booster assembly and it never did it again. I sold that car and made some good money on it but I regret selling it. It would have been a great loaner car for my customers. Sorry for the long winded post but it just explains how this part will do some crazy things. The crazy part is that it never threw a code at all.
__________________
2008 4R LTD V8 4WD, ICON Stage 3, TRD Pro Wheels, GOBI Rack, TRS HID Swap along with too many other mods to list here!

Last edited by toyo; 12-03-2023 at 04:31 AM.
toyo is offline   Reply With QuoteReply With Quote
Reply

Tags
issue , labor , master , module , unit

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Very dangerous braking behavior after electronic brake booster module replacement Charles Bronson 5th gen T4Rs 19 04-13-2022 04:17 PM
2001 4runner electric brake booster/pump with abs module zwalker16 For Sale: T4R Items 0 08-27-2021 08:48 PM
anyone ever mess up a brake booster by changing brake pads? jluu6r 3rd gen T4Rs 19 12-12-2019 05:01 PM
Hard Brake Pedal During Panic Stops - Brake Booster? Friday88 3rd gen T4Rs 23 11-01-2019 04:15 PM
2001 abs module/booster leaking 01thunder 3rd gen T4Rs 9 01-28-2019 12:01 AM

Powered by vBadvanced CMPS v3.2.2

All times are GMT -4. The time now is 11:45 AM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2024 DragonByte Technologies Ltd.
Feedback Buttons provided by Advanced Post Thanks / Like (Lite) - vBulletin Mods & Addons Copyright © 2024 DragonByte Technologies Ltd.
User Alert System provided by Advanced User Tagging (Lite) - vBulletin Mods & Addons Copyright © 2024 DragonByte Technologies Ltd.
***This site is an unofficial Toyota site, and is not officially endorsed, supported, authorized by or affiliated with Toyota. All company, product, or service names references in this web site are used for identification purposes only and may be trademarks of their respective owners. The Toyota name, marks, designs and logos, as well as Toyota model names, are registered trademarks of Toyota Motor Corporation***Ad Management plugin by RedTyger
 
Copyright © 2020