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Old 06-05-19, 12:08 PM   #1
redeye
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Exclamation steady ABS light

Hi all,
I've searched and searched for info specific to a 2005 STi but have come up with little.

Drove car home 70+ miles from getting painted. Drive was w/o issue until literally the final 3/4 mile from my house. Took a corner at a "fun" speed and boom, ABS light comes on. Steady, no flashing. DCCD was fine, not doing any flashing either.

Pull in my driveway and go to turn around and my car is binding up like crazy, wheels chirping as if the diff is fully locked. Just sounds awful.

I found a thread on NASIOC that seemed promising - someone mentioned a way to read ABS codes on an 05 STi. The thread is here and I've pasted a quote listing the supposed procedure. It's post #123. When I perform this procedure the only thing that happens is that my DCCD light blinks w/o any pausing. It blinks as if it's in the "full open" position (bottom, small green square).

Does anyone have any idea how to pull an ABS code from a 2005 STi?

QUOTE from page above:
"There's a lot of confusion on this link for the 2005 STI. Here's what I found in diagnosing a bad ABS sensor on mine:

There is a diagnostic connector on the 2005, it is grey and screwed right next to the OBD2 port. It has 2 diagnostic lines taped up. I tried these in all connector positions but COULD NOT pull up active ABS codes.

However, you can get to both ABD and DCCD controller DTC codes by using the DCCD switch per below.

Procedure to pull the ABS DTC from the DCCD control module.
1) apply parking brake
2) ignition switch ON (but engine not started)
3) dial to either 'differential locked' or 'differential free'
4) Hold accelerator pedal depressed fully.
NOTE - hold the accelerator pedal down until reading of DTC is completed
5) set the dccd dial from lock to free and back for 10 times

Read the blinks from the light.

Long blink (1.2 sec) means ten's place.
Short blink (.2 sec) means one's place"
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Old 06-05-19, 02:53 PM   #2
redeye
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Default Re: steady ABS light

I did a visual inspection since I recall hearing rubbing/grinding from right rear wheel. Turns out the axle nut had backed out a bit, definitely more than the other rear wheel by comparison. Torqued it down, went out for a test drive. Felt "better" but then my ABS light came back, the DCCD light started blinking and speedo went nuts.

Performed the procedure above and got a code 25, right rear sensor. I ordered one just now. So we'll see if that resolves it completely. I'm definitely suspicious of that sensor since the hub was quite loose - I suppose it's not out of the realm of possibility that the sensor was damaged as the wheel spun. That ABS tone ring is very close to the sensor and was wobbling around.

Seems like IWSTI used to be more active in years past. Maybe it's just me.
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Old 06-05-19, 04:22 PM   #3
redeye
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Default Re: steady ABS light

Ok. Car is fixed.

Had my son move the car since another storm was rolling through. Noticed NO reverse lights. Checked the 15a fuse. Blown. Replace. Now all systems function normally. I did read somewhere (NASIOC?) that if your reverse lamp fuse is blown your ABS, DCCD, and speedo flip out. Sure enough.
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