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Old 05-26-2009, 05:17 PM   #1
Numbchux
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Member#: 71658
Join Date: Oct 2004
Chapter/Region: MWSOC
Location: Duluth, MN
Vehicle:
'84 Brat
4" lift and 29" tires

Default stock DCCD controller without ABS?

Car: '04 STi stage rally car. ABS system bypassed, but all electronics in place. DCCD was working fine until the last couple stages of our last event (Gravity park). The ABS light came on, and soon after that, the DCCD system went into full lock. during service, we inspected all wheel sensors, and found nothing visibly failed, didn't have time to test any deeper than that. ran the last stage in full lock.

Later that night, the codriver for another team was saying that the stock controller can run off just the G sensors. We would really like to eliminate the wheel sensors if possible, as that will probably be the weak link while racing. But we do not want to loose full-auto mode.


anyone have any experience with this?
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Old 05-26-2009, 05:36 PM   #2
MasterKwan
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Location: NOVA
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2003 WRX
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Factory DCCD won't work unless the ABS controller is happy. How did you bypass it? In my 05 setup, the ABS does internal diagnostics when you turn on the key and if this fails and sets a code, you get partial lock.

I think it's likely you're on your way to an aftermarket controller. DCCD changed every year though. My setup is an 05 which is different than the 06 and might be different than the 04. If you look in the manual though, the ABS and DCCD controllers talk to each other.
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Old 05-26-2009, 06:34 PM   #3
Numbchux
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Vehicle:
'84 Brat
4" lift and 29" tires

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hydraulic lines re-routed to bypass the pump. the pump is still there and plugged in (why I said all electronics in place) though.

the control units don't "talk" to each other. the ABS unit just sends the 4 wheel sensor signals to the DCCD controller.
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Old 05-26-2009, 07:50 PM   #4
MasterKwan
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I just checked the wiring and the 04 and 05 systems are quite different. 05 only has a shield twisted pair between the ABS and DCCD controller. ABS controller is different too. Looks like my experience with the 05 system doesn't apply to the 04.
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Old 08-20-2013, 01:51 AM   #5
bue car
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Location: Torrance, CA
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07' Impreza STi wrb
95 L...

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Any updates on this?
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Old 09-18-2013, 08:06 PM   #6
Layvon
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Location: Cadillac MI
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STi 04/05/06/07
JBP / OBP for now

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Bump... Did I 2 block myself??
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Old 09-18-2013, 10:37 PM   #7
DCCDPro
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What I think happened here is the following:
1- One of the ABS speed sensors or it's connection became faulty.
2- ABS goes into error state due to loosing one of the speed signals
3- The speed information not passed to DCCD Controller and caused it to go to full lock due to zero speed on one of the wheels and thinking that there is slippage because of large speed difference on the same axle.
Using a DCCDPro Controller eliminates the need for the wheel sensor and the ABS can be completely removed if desired.

Kind regards,
-Jeff

Last edited by DCCDPro; 09-18-2013 at 10:41 PM. Reason: editorial
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Old 09-19-2013, 11:42 AM   #8
bue car
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Location: Torrance, CA
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07' Impreza STi wrb
95 L...

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^ good stuff!
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