Gentlemen, I have an 03 coupe,auto trans. I brought this one back from the dead. I have some qualifications as a career Ford driveability tech, so I feel I know a little about electronics. Anyway, started out with unintended activation of one front brake and service active suspension message. I tracked that down to what I believe is a bad SWPS switch. I will change it. But last night , driving in the rain, the abs lamp came on also. Many codes, c1225 c1232,c1233,c1235,c1248,c1256,c1282,c128 7,c1288,c1291,c1292. I have the manuals and did a little reading. the c1256 is indicative of a bad ebcm. I recently sent it out for a rebuild, but maybe the fellow didn't do a good job? I'm suspicious of the rain being a causal factor. Any help would be appreciated.I love the car, just feel maybe it has too many bells and whistles? Thanks, RH Willetts

 

i had a problem back in the day in my camaro when ABS warning light would come on after driving through the water. never had any trouble with ABS system itself

it is possible that 2 issues you describe are not related (TC/Active suspension vs ABS warning). good luck.

 

I suspect you meant Service Active Handling Vs Suspension since there is no Active Suspension message programmed into the car. I don't know anybody who actually repairs the EBCM electronics. Repairing the module electronics implies the shop has access to the ICs used in the module. The relay isn't really an electronic item.

If it isn't the EBCM have you checked the EBCM ground at G108 under the battery and made sure the wiring harness is properly connected to the EBCM? The ground at G103 is for the BPMV motor so wouldn't cause all the symptoms (codes) you are seeing. It sounds like water got into some of the connections and G108 would be a common failure point for all of the codes as would the EBCM harness connector. Since various components of the ABS are distributed around the car there is only one spot where they all come together and that is the EBCM harness connector.

Bill

 

Sorry, active handling. I did ck the grds and the connection at the ebcm, also applied dielectric grease at the plug. This came up all of a sudden. I will go through the multitude of pinpoint tests, but I suspect that the ebcm will need to be replaced. Thanks for your input.

 

I have the Service ABS and Active Handling dash lights. Just where is the EBCM ground located and where is the EBCM located? Thanks.

 

The EBCM sits between the engine and radiator.

The EBCM is on the left with the large wire harness coming into it and the sticker on top. The Brake Pressure Modulator Valve (BPMV) in on the right with the brake lines coming out. The EBCM is a dry module, meaning that you can change it out without having to worry about bleeding the ABS system. All of the brake fluid is contained within the BPMV The coils fit over small spools that have valves inside them. The valves are operated by an electromagnetic field supplied by the coils.
Also check to make sure the wire harness has a good connection. If the connection appears solid disconnect it (see step 3 in the replacement instructions below) check the pins to ensure that they have not been bent or damaged in any way. If there is any sign of corrosion, clean it off. Once everything looks good, reseat the harness.
Start by doing a quick visual inspection of the wires. If there are any obvious signs of damage, you've likely found the problem. One member had a problem with the wires rubbing the serpentine belt


Next, let's move on to the grounds. The EBCM is grounded to the chassis on the left frame rail, just forward of the engine. It's the Black box right in the middle of the picture. As you can see, it's real easy for dirt and moisture to get in that area which isn't exactly good for electronic components. Even if you never drive your car in the rain, it'll still get wet when you wash it, and that could be enough
Start by unbolting the chassis ground and then take the chassis ground connector apart.
corrosion that can build up in the ground connector. If you chassis grounds look like this one, you've probably found the problem. Even if they don't, go ahead and clean it up with a wire brush before putting it back together. Also clean off the chassis and bolt to make sure you've got a good clean ground

 

The EBCM ground is G108 and it is located under the battery. The EBCM is located just in front of and below the alternator. It is fastened to the Brake Pressure Modulator Valve (the one with all of the pipes going to it). There is a ground at G103 which is located at the ground point on the drivers side frame rail in about the same area. G108 provides the ground for the EBCM electronics and G103 provides the ground for the motor in the brake pressure modulator valve. The power circuit for the BPMV motor goes through a relay in the EBCM, to the BPMV and to ground at G103. If you have a C1214 code the problem could be in the EBCM wiring harness, the EBCM relay, the connection between the EBCM and the BPMV, the BPMV or the BPMV ground. Other EBCM problems can be related to the G108 ground.

Bill

 

I personally would replace the SWPS first. The steering position data is used in a lot of other systems. This could be the cause of your other issues.

FYI, Dealership replaced mine. $80 for sensor. $280 for labor.

My $0.02

 

Before the abs lamp came on, I had only ck active handling/traction control warning lamps. So, at that time , the abs system was still active. It says it has this strategy in the repair manual, but you never know, so you may be right. I will replace the swps first, but I still think I'm looking at an ebcm replacement. Thanks to all.

 

It could be a combination of the bad SWPS and a flakey ground connection mentioned above. Good Luck.