2007 ls460 code C1253 fixed

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01-12-24 | 09:13 PM

thannguy

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Driver School Candidate

Joined: Apr 2013

Posts: 15

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From: TX

2007 ls460 code C1253 fixed

check VSC, ABS, brake system, code c1253, lots of rain

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check VSC, ABS, brake system, code c1253, lots of rain

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#16

scutch , 08-18-23 04:28 PM
Pit Crew
Quote:
Originally Posted by Boykie
Same as LS. Pump assy includes an accumulator - with diaphragm and high pressure nitrogen. In pic it looks like a water tower vertically mounted to pump motor.
Thank you! I think I understand.
Is Part 47070 (power brake booster) as an assembly, including the accumulator, called the ABS pump or is just the part that the water tower is mounted to called the ABS pump?
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#17

Boykie , 08-18-23 04:32 PM
Instructor

So this is what TMC calls those parts. Otherwise I personally do 'actuator' and 'pump assembly' and people understand me.
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#18

scutch , 08-18-23 04:37 PM
Pit Crew
Quote:
Originally Posted by Boykie

So this is what TMC calls those parts. Otherwise I personally do 'actuator' and 'pump assembly' and people understand me.

Thanks, that really helps too. So depending upon what authority you use there are different names. But I think I now have a full understanding of the parts in question.
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#19

Boykie , 08-18-23 04:41 PM
Instructor

Have a blast

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#20

Gerf , 08-18-23 04:55 PM
Racer
Quote:
Originally Posted by Boykie
Same as LS. Pump assy includes an accumulator - with diaphragm and high pressure nitrogen. In pic it looks like a water tower vertically mounted to pump motor.
Had a brain fart, I meant nitrogen.

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#21

Boykie , 08-18-23 05:03 PM
Instructor
"Is that cooking spray??? - Yea. He thinks it's called 'hair shellac'".
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#22

scutch , 10-02-23 10:10 PM
Pit Crew
Update: the accumulator aka abs pump 47070-50040, and brake actuator 44050-50110 were replaced and the same brake error lights still came on almost every morning, just as before, and would often not come back on again on restarts after it warmed up in the afternoon. The latest code is 1252.
Am curious what it is about the cold weather? or Mornings? At first I thought it was the rain, but that has been gone for a month. Is it a time thing about sitting over night? That doesn't work if the lights sometimes don't come on in the morning. The mechanic said he was on the phone with a Toyota master mechanic going through the 20 page electrical test that looks like the one that has been posted on ClubLexus here in pdf form. See attached.

Here is the latest diagnosis. Replace the Engine room no.2 Junction box, aka Junction Block because a relay is bad and you have to replace the whole fuse box thing.
Seems like a bad design there. Part 82720-50081
$600 for part and labor.
I sure hope this is the end of the brake actuator saga.

DESCRIPTION 13.pdf (631.3 KB)

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#23

thannguy , Today 11:01 PM
8th Gear
Hey guys, just letting you know that i have the 2007 LS460 with code C1253 and after struggling for 2 months, I finally got it fixed. I had to replace abs actuator part #04003- 45450 (latest updated version). Before that, dealer replaced with 2nd version (44050-50110) and the car ran for 1 week and code came back. Please don't waste your time like me ... install that last version !!! btw, i also replaced abs pump (47070-50040) as it will eventually fail because actuator problem. I had them both replaced by Toyota dealer, total parts and labor $3300 (i bought parts from Lexus). Note that all actuator version only has new part # on the outside box ... the old model # is always the same printed on the part itself. It looks like all 4 versions are rebuilt parts by manufacturer and so original part number is printed on the part itself regardless what shows outside of the box.

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