HELP abs code 51. What do I fix ?

[tromz]

abs light is showing code 51 actuator circuit or whatever it says. How do I fix it. The FSm just shows removal
Thanks

 

[Cruzerman]

aThe FSm just shows removal Thanks

IMHO, removal would be a good fix.

 

[tromz]

So is there simplistic way to swap it out n stuff an have the light off?

 

[jstew0903]

What did you find with this? I have a 51 code as well.

 

[tromz]

Nothing. Cleaned it up got some new sensor wires. Same code. What to do?

 

[jstew0903]

My best friend and I both had this code @tromz and we both replaced the ABS pumps and it cured this ABS code. Fairly easy to change. Bleeding is the worst part. I changed the master cylinder while I was in there. $60 for a new Asian MC. Hope this helps.

Jason

 

[tromz]

The actuator motor you replaced. Or which part. master cylinder has already been replaced

 

[jstew0903]

I replaced both pump and master. Didn't have to do the master to get the abs light to go away. Just figured while I had the hard brake lines off it would be another baseline replacement. Rock Auto had a great deal on the Asian brand master.

 

[tromz]

That pump is expensive. Where did you locate one

 

[tromz]

Specter wanted like 1000 bucks

 

[jstew0903]

Search around. Should be plenty of used ones out there. Part number 44510-60010

93-97 Toyota Land Cruiser Anti-lock Brake Modulator Value ABS FZJ80 LX450 pump | eBay

<p dir="ltr">93-97 Toyota Land Cruiser Anti-lock Brake Modulator Value ABS FZJ80 LX450 pump. Condition is Used.</p> <p dir="ltr">Please see photos of actual item being sold.</p> <p dir="ltr">Please let me know if you have any questions or need any other parts. Thank you!</p>

www.ebay.com

 

[98 SNAKE EATER]

Before you change the pump, try jumping it directly using a fused jumper lead.
In most cases, you can tap the power wire quickly on 12v while banging on the pump motor to break it loose.
Once it starts singing, cycle it on and off for a few seconds at a time, then clear the code and you should be good to go.

 

[thelal]

Before you change the pump, try jumping it directly using a fused jumper lead.
In most cases, you can tap the power wire quickly on 12v while banging on the pump motor to break it loose.
Once it starts singing, cycle it on and off for a few seconds at a time, then clear the code and you should be good to go.

View attachment 3939172

Not getting any movement or noise when applying voltage per the pins
Any advice

 

[98 SNAKE EATER]

Not getting any movement or noise when applying voltage per the pins
Any advice

Are you getting a click or a little spark from the wires when touching to positive lead?

If so, it may be shorted.

The pumps are notorious for shorting out due to rust scale in the endbell.

Here's one from a junkyard before and after cleaning

Might be worth a shot to remove yours

 

[jpoole]

Here's a post that I made on this same topic / fix:

Post in thread 'ABS DTC code 51'

May 30, 2024

I wanted to share a relatively easy fix for code 51 that may apply in some situations. On my '97 I noticed the ABS light earlier today and pulled the codes after a general inspection and test of the CDL, etc. The code that came back was 51 so I then hot-wired the abs pump to see if it would turn over with direct power applied. This is something that I do during brake bleeding so I was familiar with how the pump should sound. When I hot-wired the pump the sound/feel of the pump lead me to believe that motor was ok electrically but blocked mechanically, which turned out to be the case.

I...

• jpoole

• 

there is another contributor to the thread confirms that the motor can be cleaned up without removing the pump/breaking the brake lines or needing to do a full re-bleed.

H

Post in thread 'ABS DTC code 51'

Mar 16, 2025

Update, edited with correct terminology.

Big Shout out to @Jpoole, I Fixed my ABS this weekend using his method of removing the stator housing from the ABS pump and cleaning out the rust particles that were jamming the motor. So first I obtained a used unit that was locked up so I had nothing to loose, removed that stator housing from the motor and yup, it was rusty enough to jam the motor but not horrible, cleaned it all out and reassembled and success! When bench tested by jumping the harness I got it to spin over....Ok, now onto the vehicle....I still didn't want to break...

• Heelerdude

• 

 

[thelal]

Are you getting a click or a little spark from the wires when touching to positive lead?

..

Not getting anything; tried tapping ABS unit but no difference
Putting car to ON - see ABS come on and then out after few secs. Not moved car yet but suspect will trip again (code 51) once move a few feet
Cleaning up rear sensors (checked fronts & cleaned - both fine); both have lots their plastic 'tips' so putting on an epoxy layer.

Thanks for pictures. will check out post.

 

[jht3]

well wouldn't you know it, ABS light triggered this morning. haven't driven the truck since last Wed, and it was fine then.

start the truck, ABS light goes out, but turns on after a few feet of movement.

pulled the code, and Code 51

next up is jumping the motor manually. haven't done it in this truck, but did unstick a valve/solenoid is a Bosch unit in an E30 BMW by applying +12v and tapping w/ a hammer

if that doesn't work, i'll attempt this ABS pump surgery. unless someone has a good pump laying about? i'd like to keep ABS.

 

[MissahPapaJ]

Delete the ABS….. it’s fun to do bad stuff.

 

[98 SNAKE EATER]

well wouldn't you know it, ABS light triggered this morning. haven't driven the truck since last Wed, and it was fine then.

start the truck, ABS light goes out, but turns on after a few feet of movement.

pulled the code, and Code 51

next up is jumping the motor manually. haven't done it in this truck, but did unstick a valve/solenoid is a Bosch unit in an E30 BMW by applying +12v and tapping w/ a hammer

if that doesn't work, i'll attempt this ABS pump surgery. unless someone has a good pump laying about? i'd like to keep ABS.

If jumping doesn't work, pull the endbell and clean out all the rust

 

[jht3]

If jumping doesn't work, pull the endbell and clean out all the rust

any tips on what to clean with? just compressed air, or anything else? ospho, evaporust, naval jelly, unicorn tears?