ABS scan says" check ABS pump mtr" what does this mean??

M

Mark8itup

Registered
Hi everyone, I had some trouble with the ABS light and the Check Traction control message coming up after reaching a speed of about 10 mph. I had the System scanned today per Franki X instructions and the scan came up with a code of c1097 or c1095 one of the 2 I cant remember. The tech told me this code said to " check ABS pump mtr". I think this is going to be expensive. Any info would be outstanding.

Thanks, Jesse
Mark8itup
98 LSC BLK/BLK 69400 miles
67 Mustang Coupe Orange Crush/ Black 320 miles
 
RE: ABS scan says" check ABS pump mtr" what does this mean??

This is exactly the same problem I had. New pumps=2000.00 , no one rebuilds them anymore. That leaves junkyard pump. I got a good one for 150.00 after much searching. Be sure to have the pump properly bled, It has to be cycled in a specific way to insure no air in system. While you are at it have the entire system completly flushed. The pumps are very sensitive to trash in the system. Quick question. Did you just have a brake job?
 
RE: ABS scan says" check ABS pump mtr" what does this mean??

Yes the brakes were just done. Could that have something to do with it?

Thanks, Jesse
Mark8itup
98 LSC BLK/BLK 69400 miles
67 Mustang Coupe Orange Crush/ Black 320 miles
 
RE: ABS scan says" check ABS pump mtr" what does this mean??

I lost my pump shortly after I did a brake job also. I have seen it suggested that when you push the caliper back in without opening the bleeder valve you push trash backwards through the pump, thus causing problems. Has anyone else noticed this?
 
RE: ABS scan says" check ABS pump mtr" what does this mean??

That makes sense.

It's never been a problem for me, though.
 
RE: ABS scan says" check ABS pump mtr" what does this mean??

RE: ABS scan says" check ABS pump mtr" what does this mean??

Hooboy, Jesse! C1095 is a big buck code! I don't know how much long distance help I can give you on this one.

Here's a little background to help you understand what you're dealing with:
The ABS/TC control assembly is mounted in the driver's fender under the battery. It consists of two pieces bolted together- the HCU (Hydraulic Control Unit) and ECU (Electronic Control unit). They can be split apart and puchased separately. Here's the copy-and-paste from the manual:

---------------
"ANTILOCK BRAKE CONTROL MODULE:

The anti-lock brake control module is mounted to the HCU.

It is an On Board Diagnostic, replaceable unit consisting of two microprocessors and the necessary circuitry for their operation. The anti-lock brake control module monitors system operation during normal driving as well as during anti-lock braking and traction control cycling, if equipped.

Anti-lock brake control module operation is as follows:

Under normal driving conditions, the microprocessor produces short test pulses to the solenoid valves that check the electrical system without any mechanical reaction.
Impending wheel lock conditions trigger signals from the anti-lock brake control module that open and close the appropriate solenoid valves. This results in moderate pulsations in the brake pedal (2455) .
During normal braking, the brake pedal feel will be identical to a standard brake system.
Most faults which occur to the anti-lock brake system and the traction control will be stored as a diagnostic trouble code (DTC) in the keep-alive memory of the anti-lock brake control module. The DTCs can be retrieved by following the on-board diagnostic procedures. Refer to Diagnosis and Testing.

HYDRAULIC CONTROL UNIT:

The HCU is located outside of the engine compartment on a bracket attached to the outer frame rail. It consists of the following components:

Brake pressure control valve block.
Pump motor.

Operation of the HCU is as follows:

During normal braking, fluid passes through four normally open inlet valves, one to each wheel.
If the anti-lock brake control module senses a wheel is about to lock, it pulses the appropriate inlet valve which closes that valve. This prevents any more fluid from entering the affected brake.
The anti-lock brake control module then looks at that wheel again. If it is still decelerating, it opens the closed outlet valve which decreases the pressure trapped in the line.
The traction control portion of the brake pressure control valve block contains two isolation valves for traction control function, one for the primary circuit and one for the secondary circuit. The isolation valves close during traction control operation to prevent front brake application.
The brake pressure control valve block and pump motor are replaced as an assembly"
---------------

Every time you start your car and begin driving, at ~12MPH, the module does a self-test and turns the pump on for .5sec. to make sure it works. Yours doesn't, obviously, and the light comes on and a code is set.

Now, what do we do about this?

Two things could be happening; either the module has an internal fault and can't turn the pump on, or the pump is defective and won't turn on when commanded (based on past experiences, that's where my money is). A scan tool capable of "Active Command" which can take manual control of the module's functions is needed to follow a specific series of pinpoint tests to tell which it is.

Here's a simple driveway test:
Fuses 20 and 21 in your underhood fusebox power the pump and module. See if either are blown. If so, this would be an indication the motor is drawing too much current. I suppose this could also indicate shorted wiring, but the harness down to the control assembly is very well protected, so I kinda doubt that.

I suggest you follow Kurt's advice and find a used control assemby. If you replace both pieces, does it matter which one is at fault? As Kurt mentioned, when you do replace it, a scan tool MUST be used to perform an Electronic HCU Bleed or you'll never get the air out of the internal valve chambers.

C'mon, LOD! If anybody is parting out a '98 (no other year will work), could you help poor Jesse find a known good control assembly?
 
RE: ABS scan says" check ABS pump mtr" what does this mean??

RE: ABS scan says" check ABS pump mtr" what does this mean??

Hi, thanks Franki X. Can anyone lend a helping hand here. Also how long will it be before I get me LOD stuff in the mail. I have a naked rear window!!!

Jesse
Mark8itup
98 LSC BLK/BLK 69400 miles
67 Mustang Coupe Orange Crush/ Black 320 miles
 
RE: ABS scan says" check ABS pump mtr" what does this mean??

RE: ABS scan says" check ABS pump mtr" what does this mean??

Frank,
You said that only a 98 pump will work. Are you sure? In my search most places said that the pump was the same for 93-97. Not true. My pump (97) is different from 1st gen. I assumed it was the same as a 98, but I know I received a pump from a 97. (gen2 = full time traction control)
 
RE: ABS scan says" check ABS pump mtr" what does this mean??

RE: ABS scan says" check ABS pump mtr" what does this mean??

Ok, I checked the fuse box under the hood and fuse # 20 was missing? I replaced it and as soon as I put the fuse in the something under the battery near the fender started making a humming noise. Mind you now the car is off, I started the car up and the only time the thing stopped humming was when I put my foot on the brake or pulled the fuse. Guess thats why the fuse was missing. Any Ideas?

Thanks, Jesse
Mark8itup
98 LSC BLK/BLK 69400 miles
67 Mustang Coupe Orange Crush/ Black 320 miles
 
RE: ABS scan says" check ABS pump mtr" what does this mean??

RE: ABS scan says" check ABS pump mtr" what does this mean??

Well, since the ABS pump is located under the battery, i'd say that was your motor going nuts. Sounds like a fried control module or a short circuit somewhere.
 
RE: ABS scan says" check ABS pump mtr" what does this mean??

RE: ABS scan says" check ABS pump mtr" what does this mean??

Yes!!
The first question in the Ford pinpoint test series is, "Does the pump motor run at all times? Y/N?
If the answer is yes, the response, after a few OBDII network checks, is to replace the ABS/TC module.

Jesse, just to be sure you've covered everything, scan the car again with the fuse in and see if you get any different codes.


The '98 module is unique. The HCU is common to all 2nd Gens. 1st Gen ABS/TC systems, because they are stand-alone and not integrated into the OBDII multiplexed network, are interchangeable '93 - '96 (depending upon build date within the '96 production year; don't take it for granted.)
 
RE: ABS scan says" check ABS pump mtr" what does this mean??

RE: ABS scan says" check ABS pump mtr" what does this mean??

Hey Frankie, you mention an active scanner is needed:

"A scan tool capable of "Active Command" which can take manual control of the module's functions is needed to follow a specific series of pinpoint tests to tell which it is.

... a scan tool MUST be used to perform an Electronic HCU Bleed or you'll never get the air out of the internal valve chambers."

Would a Star II scanner do this? (see this one mentioned often in the manual) ; or is a more advanced scanner required?

While I got you, another quick scanner question: I've acquired a rotunda distributorless ignition tester, A) I assume this works on 4.6 engines? B) what data catridge would I use? 8 high data rate? Thanks!
 
RE: ABS scan says" check ABS pump mtr" what does this mean??

RE: ABS scan says" check ABS pump mtr" what does this mean??

STARII?? Jeff, I don't even know if the one in our dealership still works, it's been so long since we used it.

There's some confusion sometimes about Ford's names for tools. The STARII was a small black box ~4"X6" with a single "Latching Trigger" in the middle and a small screen that showed you 3 digit codes near the top.
You may be referring to NGS, "New Generation STAR", a larger T-shaped unit that takes function cards via a slot in the back. If that's the case, yes, that's what we use. There's a red coloured card that is the "Diagnostic Data" card, and a green "Service Function" card that contains the HCU Bleed, among many other things.

Ford also has WDS (World Diagnostic System), which is a GenRad touch screen laptop. It's only for OBDII.
My dealership is getting a few of Ford's newest diagnostic tools, the PDS (Pocket Diagnostic System), which is a small interface unit that lets techs use their own Palm Pilots as the driving computers.

Yes, Ford distibutorless ignition is 8 bit high data. Let me clarify that! I mean coil pack ignitions with ignition modules.
COP vehicles have no ignition systems per se, the CKP and CAMP sensors are inputs into the PCM, which makes all control calculations and drives the COP coils just like any other actuators (eg: injectors or control solenoids.)
 
RE: ABS scan says" check ABS pump mtr" what does this mean??

RE: ABS scan says" check ABS pump mtr" what does this mean??

Thanks Frankie!

Your description of both scanners sounds familiar. As I was typing my query above, I remembered a reference from my '94 service manual about using a star II scanner(don't remember for what); was simply wondering if that was an "active" scanner.
 
RE: ABS scan says" check ABS pump mtr" what does this mean??

RE: ABS scan says" check ABS pump mtr" what does this mean??

I changed my ABS module today. found it at a local junkyard $125 for the pump and module. By the way the module is discontinued and no longer availible from the dealer. Turns out my ABS module was smashed in the top left hand corner.Dont know, how there is no other damage around the fender area It was a real pain to get out because the bolts that hold it on were all seized and broke. Took me about 2 hours and my ABS/Traciton Control problem is history. Thanks a bunch for alll the help. I also have the pump form the same car that I will be selling on ebay. Hope to get some money back.

Thanks Jesse

Mark8itup
98 LSC BLK/BLK 69400 miles
67 Mustang Coupe Orange Crush/ Black 320 miles
 
RE: ABS scan says" check ABS pump mtr" what does this mean??

RE: ABS scan says" check ABS pump mtr" what does this mean??

Good job, Jesse!

I must compliment you for climbing a very steep learning curve; from your first "Are ABS and Traction Control linked?" post to a high-tech job well done.
 
RE: ABS scan says" check ABS pump mtr" what does this mean??

RE: ABS scan says" check ABS pump mtr" what does this mean??

Thanks alot Franki X. You were a great help in all of the posts that I have left about my numerous eletrical problems. I am pretty mechanicaly inclined, I built my 67 Mustang coupe from the ground up. Every nut, bolt, and screw is new in the old girl. But this Mark is way more advanced. I apreciate all the help and all the advice from evryone in this forum. Now that I have my little problems worked out. I think its time to start shopping for new 18" rims and tires. Any Ideas??

Thanks, Jesse
Mark8itup
98 LSC BLK/BLK 69400 miles
67 Mustang Coupe Orange Crush/ Black 320 miles
 
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