User Tag List

Reply
 
Thread Tools Rate Thread Display Modes
Old 06-14-2022, 07:16 PM #16
1950884 1950884 is offline
Member
 
Join Date: Jun 2009
Location: Michiana
Posts: 34
1950884 is on a distinguished road
1950884 1950884 is offline
Member
 
Join Date: Jun 2009
Location: Michiana
Posts: 34
1950884 is on a distinguished road
Quote:
Originally Posted by Jakeepoo3 View Post
You should be running around 14 to 14.5 volts in charging mode.
I re-measured, 12.6 while off and 13.9 while idling. Taken from the battery.
1950884 is offline   Reply With QuoteReply With Quote
Old 06-14-2022, 07:30 PM #17
1950884 1950884 is offline
Member
 
Join Date: Jun 2009
Location: Michiana
Posts: 34
1950884 is on a distinguished road
1950884 1950884 is offline
Member
 
Join Date: Jun 2009
Location: Michiana
Posts: 34
1950884 is on a distinguished road
Quote:
Originally Posted by Jakeepoo3 View Post
Experience and knowledge. $2000 worth. O2 sensor is a ECM input thus your ECM code. O2 sensor is an input to skid ECU through ECM. Skid ECU disabled without O2 sensor input. The abs code is due to your disabled skid ECU. The braking problem you had is due to your skid ECU not getting proper input signals and it disabled itself. Your brakes still work right?
Yes, the brakes seem to function properly. After installing the new O2 sensor & trying to pry one of the ABS sensor out (started to crack the case so stopped) I cleared the codes and drove about 5 miles to the auto part store. New codes:
C0200 Right ABS sensor malfunction
C0205 Left ABS sensor malfunction
C1223 General ABS system fault
C1241 Low battery positive volt
C1256 Accumulator Low Pressure...Confession: This might have occurred because I tested the brake by pumping them 7 to 8 times while idling and the ABS warning light came on and it buzzed. Unfortunately the Accumulator is already on order.

I wish I had techstream -> Procedure to troubleshoot C1241 Low Battery Post Volt.
1950884 is offline   Reply With QuoteReply With Quote
Old 06-14-2022, 07:31 PM #18
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 1950884 View Post
How all of these systems interact is becoming clearer. My trouble is that I've driven the vehicle exactly how it currently sits without any engine codes (at least not that I was aware of).

I bought the vehicle with a 3 inch lift and the tires hit the frame, fender and liner, so I changed from mud tires to less aggressive off road, I also had the frame cut to accommodate oversized tires. Now the tires very seldom rub. But when they do rub the car VSC Atrac etc alerts go off.
That rub could indeed affect your skid ECU. Speed sensor and steering angle sensor may be thrown off detecting the rub. Both are skid inputs. You need to do a few things it sounds like. Most importantly body mount chop. Next check test o2 sensor with a multimeter and propane torch. Replace if bad. Next complete initialization/learn procedures. Reset skid zero points.
Jakeepoo3 is offline   Reply With QuoteReply With Quote
Old 06-14-2022, 07:35 PM #19
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 1950884 View Post
Yes, the brakes seem to function properly. After installing the new O2 sensor & trying to pry one of the ABS sensor out (started to crack the case so stopped) I cleared the codes and drove about 5 miles to the auto part store. New codes:
C0200 Right ABS sensor malfunction
C0205 Left ABS sensor malfunction
C1223 General ABS system fault
C1241 Low battery positive volt
C1256 Accumulator Low Pressure...Confession: This might have occurred because I tested the brake by pumping them 7 to 8 times while idling and the ABS warning light came on and it buzzed. Unfortunately the Accumulator is already on order.

I wish I had techstream -> Procedure to troubleshoot C1241 Low Battery Post Volt.
You're causing more problems 😂 not fixing them. Now you need a new speed sensor. After you replace any PCM input you have to do the initialization and learn procedures.. quit doing that brake thing that would happen to anyone doing that..
Jakeepoo3 is offline   Reply With QuoteReply With Quote
Old 06-14-2022, 07:38 PM #20
1950884 1950884 is offline
Member
 
Join Date: Jun 2009
Location: Michiana
Posts: 34
1950884 is on a distinguished road
1950884 1950884 is offline
Member
 
Join Date: Jun 2009
Location: Michiana
Posts: 34
1950884 is on a distinguished road
I reset everything and drove very gingerly for 5 miles and the codes came back. No tires rubbed during those 5 miles.

All I need is a way to read DTC codes. I can follow these simple procedure to determine if C1256 is an actual issue or caused by something else.

In my case I caused the code. Toyota has this to say about C1256
Quote:
HINT:
Excessive brake pedal operation results in abnormal accumulator pressure consumption. This is normal.
1950884 is offline   Reply With QuoteReply With Quote
Old 06-14-2022, 07:42 PM #21
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 1950884 View Post
I reset everything and drove very gingerly for 5 miles and the codes came back. No tires rubbed during those 5 miles.

All I need is a way to read DTC codes. I can follow these simple procedure to determine if C1256 is an actual issue or caused by something else.

In my case I caused the code. Toyota has this to say about C1256
You have to initialize/learn the PCM because you unplugged the sensor.. you can pull codes at home in the driveway..
Jakeepoo3 is offline   Reply With QuoteReply With Quote
Old 06-14-2022, 07:43 PM #22
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
Yeah follow that hint and quit tripping those codes.
Jakeepoo3 is offline   Reply With QuoteReply With Quote
Old 06-14-2022, 07:54 PM #23
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
Jake Gore - 33"s on the lady here in a minute ?

Body mount chop about an hour or so.
Jakeepoo3 is offline   Reply With QuoteReply With Quote
Old 06-14-2022, 09:40 PM #24
1950884 1950884 is offline
Member
 
Join Date: Jun 2009
Location: Michiana
Posts: 34
1950884 is on a distinguished road
1950884 1950884 is offline
Member
 
Join Date: Jun 2009
Location: Michiana
Posts: 34
1950884 is on a distinguished road
Quote:
Originally Posted by 1950884 View Post
Got a 2006 V6 w/ 195k miles. Has been trouble free for 65k miles and now needs some love. My dash is lit with VSC Off / pic of car skidding, VSC Trac, & Check engine.

A) With the truck off and parked, cycling the brake doesn’t result in much of an increase in pedal pressure. I pumped 50 times. It gets a little more stiff but I can still press the pedal to the floor. Is what I described normal or is it indicative of an internal leak in my brake master cylinder?
This is normal: (2) Depress the brake pedal 20 times or more to release the pressure in the accumulator. HINT: When the pressure is released, the brake pedal stroke becomes longer.


Quote:
Originally Posted by 1950884 View Post
B) After performing the above, turning the key on (motor not running) the brake pump ran for 8 to 10 seconds. Pressing the brake once cause the pump to run for 2 to 3 seconds. Press the brake again and the pump runs for 2 to 3 seconds. Repeat. This Informs me that the accumulator is not functioning, because it should hold more pressure than 1 brake pump. Do you agree?
This is NOT normal: (5) Turn the ignition switch to ON and measure the brake booster pump operating time (the time from when the brake booster pump starts operating until it stops). OK: 20 to 80 seconds

(10) Depress the brake pedal 4 or 5 times and measure the brake booster pump operating time (the time from when the brake booster pump starts operating until it stops). OK: 2 to 11 seconds


I suspect a defective accumulator, pressure sensor or very unlikely both.

Quote:
Originally Posted by Jakeepoo3 View Post
That rub could indeed affect your skid ECU. Speed sensor and steering angle sensor may be thrown off detecting the rub. Both are skid inputs. You need to do a few things it sounds like. Most importantly body mount chop. Next check test o2 sensor with a multimeter and propane torch. Replace if bad. Next complete initialization/learn procedures. Reset skid zero points.
I really don't want to go down the modification path. That is what my MR2 is for. Based on failing the test Toyota has designed to isolate testing the brake system irrespective of skid ECU, my 4runner is not in spec.
1950884 is offline   Reply With QuoteReply With Quote
Old 06-14-2022, 10:36 PM #25
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
Here's the complete procedure. These things tend to have to be done in specific proper order. Mentions the warning lights you have or shouldn't during this test... Also the buzzer. I'm just more into paying a few dollars for the minor causes of the problem to see if it fixes before I pay big cash for something I don't need. If you wouldn't have broken that speed sensor you'd probably already know either way.

Last edited by Jakeepoo3; 06-14-2022 at 10:53 PM.
Jakeepoo3 is offline   Reply With QuoteReply With Quote
Old 06-15-2022, 12:23 PM #26
1950884 1950884 is offline
Member
 
Join Date: Jun 2009
Location: Michiana
Posts: 34
1950884 is on a distinguished road
1950884 1950884 is offline
Member
 
Join Date: Jun 2009
Location: Michiana
Posts: 34
1950884 is on a distinguished road
Quote:
Originally Posted by Jakeepoo3 View Post
Here's the complete procedure. These things tend to have to be done in specific proper order. Mentions the warning lights you have or shouldn't during this test... Also the buzzer. I'm just more into paying a few dollars for the minor causes of the problem to see if it fixes before I pay big cash for something I don't need. If you wouldn't have broken that speed sensor you'd probably already know either way.
I followed the procedure start to finish. The ABS plastic body is cracked but the sensor is still functioning. I do appreciate you trying to save me money!
1950884 is offline   Reply With QuoteReply With Quote
Old 06-15-2022, 07:13 PM #27
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 1950884 View Post
I followed the procedure start to finish. The ABS plastic body is cracked but the sensor is still functioning. I do appreciate you trying to save me money!
If the speed sensor is still functioning it's really weird how you got two new speed sensor codes. By the way this will cause all the same lights to come on and disable the skid ECU the same as the O2 sensor did. I see that o2 code went away. Be interesting to know if everything is working correctly after you replace the speed sensor before replacing the accumulator. Either way works I guess.
Jakeepoo3 is offline   Reply With QuoteReply With Quote
Old 07-04-2022, 12:21 PM #28
1950884 1950884 is offline
Member
 
Join Date: Jun 2009
Location: Michiana
Posts: 34
1950884 is on a distinguished road
1950884 1950884 is offline
Member
 
Join Date: Jun 2009
Location: Michiana
Posts: 34
1950884 is on a distinguished road
Smile

According to factory manual BR-3 ‘brake fluid bleeding after replacing the brake accumulator’ the hydraulic pump should operate for 8 to 14 seconds. Mine clocked in at 12 to 13 seconds. I haven’t had any check engine codes since installing. I might pay toyota $125 to bleed the master and brakes but the brakes feel great so this is not necessary. Consider the problem in the OP solved unless I return to this thread.
1950884 is offline   Reply With QuoteReply With Quote
Reply

Tags
brake , pressure , pump , seconds , vsc

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
Low accumulator pressure??? RedRumt4r 4th Gen T4Rs 5 01-16-2022 07:18 PM
ABS accumulator clunk ASUMTNEER 5th gen T4Rs 0 12-05-2020 01:06 PM
Possible brake accumulator issue cashflow50 3rd gen T4Rs 5 12-01-2020 05:53 PM
C1223/C1256 abs codes on scanner but no engine codes or lights keakar 4th Gen T4Rs 4 04-22-2019 02:37 PM
Accumulator Springs Dous 3rd gen T4Rs 0 04-04-2012 09:07 AM

Powered by vBadvanced CMPS v3.2.2

All times are GMT -4. The time now is 11:55 PM.

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