ABS code 22 returns, please help!

[Dan Werling]

Hey guys,

As some of you know, I am a Sable owner, on the way to becoming a SHOble LTS. Anyway, For the longest time I have had an ABS light on, and a code 22. The other day I decided to install a new HCU on the car that I had gotten from a trade, that was removed from a "working" car. After I installed the unit I bled the brakes and had a good pedal and everything. Once I jumped in the car to check to see if the ABS light was still on, it was. I read the codes and I still have a code 22, that is the only code that I have. The battery was completely removed from the car during the install so the computer had plenty of time to reset. My question is, has anyone had something like this happen to them... I am wondering if I just got another bad HCU, or could it possibly be wiring. The car has never ever been to the body shop, been in a wreck, anything that I would belive to have damaged the system so I'm not sure what to conclude. If anyone please give any possible input, i'd appreciate it! Thank you very much!

1995 Mercury Sable LTS
3.8L 4wheel Disk

 

[Dan Werling]

Has anyone ever been able to repair a code 22 just by replacing the HCU?

 

[rangerj]

Code 22 is relative to the solenoid valve, not the HCU. Check the connections to the LH front inlet valve and its circuitry.

 

[Dan Werling]

I believe I replaced the solenoids when i replaced the motor and assembly, correct? I replaced the whole pump assembly that sits right under the battery(on a sable), under the air box on a SHO. Which plug would I be checking for that solenoid valve?

Thank you very much

 

[Dan Werling]

Anyone else have any ideas?

 

[rangerj]

Dan,
Hang in there for a few minutes. I'm tryinh to figure out how to walk you through the tests without having a Rotunda Break Out Box (BOB). While I'm working on it find the wiring diagrams for your model year. They are in a sticky. Trace the ABS harnesses and the connectors. Most if not all of my referrences atre going to be to "pin numbers". the tests are going to be ohms resistance, continuity, and/or voltage tests. There are about 20 tests for a code 22 and about half of them will be at the 19 pin connector at the valve body. Some will be at the 55 pin connector at the electronic controller.

 

[Dan Werling]

Sho

Thank you very much rangerj!

 

[rangerj]

The 55 pin connector to the electronic controller to the ABS is the 1st step. The 55 pins begin on the bottom with pin #1 having a LG-Y 16 gauge wire. The numbers go up to 19 on the first row. Row number 2 begins with pin 20 at the bottom which is a Tan 16 Ga. wire. #37 is at the top of the middle row. Row #3 begins at the bottom with # 38 a Tan wiith a red stripe wire also 16 Ga. Your Sable is a different model year than the schematics I am working with and it could be different. Check out what I have provided so far and let me know if it is the same, or different.

With the KOEO test pin number three (#3) O-Y, and ground (body) for a minimum of 10 Volts with a volt meter. Use a DIGITAL multi-meter if you have one. If you get less than 10V you have a harness problem.

 

[rangerj]

Dan,

Are you ready for a few more of the tests?

 

[Dan Werling]

I will give that test a try tomorrow afternoon. Thanks!

 

[rangerj]

Note: If you are getting any other codes, ignore code 22 and fix the other codes first.

Test 2. Check LH front inlet valve and circuitry

Measure ohms resistance between pins 3 and 20 of the 55 pin connector (at the connector). Pin 3 (O/Y wire) is the source of power and pin 20(Tan wire) is the valve #1 to module connection. The reading should be 5 to 8 ohms. If it is reverify code 22. If not, next test;

Test #3 Check LH front inlet valve

Disconnect Valve Body 19-pin connector. Measure resistance between pin # 17 (Tan) and pin #7(O/Y) Should be between 5 and 8 ohms resistance. If it is you have a harness problem e.g. connection, open, short. If not, replace the valve body. (Note pin #16 is White and #18 is Pink. #7 will be to the White side. #7 and #13 are the same color and both are in the middle row at the ends. Be careful not to mix up the #7 and #13 wires.

I'll give you more tomorrow. My fingers are tired!