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Old 10-17-2007, 09:13 PM   #1
Dave_MacKinnon
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Member#: 10823
Join Date: Oct 2001
Location: Burlington, Ontario
Vehicle:
2007 STi
Silver

Default DTC and DCCD Reset

I need to clear some codes from my DCCD CPU - does anyone know if any software can 'see' it? I have the Tactrix and OBD-2.com cables.
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Old 10-18-2007, 10:15 AM   #2
Hyper
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1999 WRB GM6
2.34 LR destroker

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where do those show up?
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Old 10-18-2007, 10:33 AM   #3
Dave_MacKinnon
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2007 STi
Silver

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There is a 'procedure' that allows the DCCD position indicators to blink out a trouble code pattern.

Mine shows codes 31 and 37... and doesn't engage the DCCD - leaves it open.

I accidentally powered up the car with the DCCD controller unplugged and it hasn't worked since.

Here is the procedure from the 2007 Impreza service manual.....

1. WHEN USING THE DIAGNOSIS
INDICATOR LIGHT
NOTE:
Perform steps 4) to 8) below within 30 seconds.
1) Securely apply the parking brake.
2) Switch the center differential control dial in the
differential free position.
3) Start the engine.
4) Switch the center differential control dial in the
differential lock position.
5) Release the parking brake.
6) Switch the center differential control dial in the
differential free position.
7) Securely apply the parking brake.
8) Repeat steps 4) to 7) two more times.


DTC Item Content of diagnosis Reference target
21 Accelerator Position Sensor E
Open or short in the accelerator pedal position sensor circuit
<Ref. to 6MT(diag)-56, DTC P2125 ACCELERATOR POSITION SENSOR E, Diagnostic Procedure with Diagnostic Trouble Code DTC).>
22 Lateral Acceleration Sensor Circuit
Open or short in the lateral G sensor circuit
<Ref. to 6MT(diag)-39, DTC P1759 LATERAL ACCELERATION SENSOR CIRCUIT, Diagnostic Procedure with Diagnostic Trouble Code
(DTC).>
23 Circuit of Center Diff. Open or short in the driver’s control center differential circuit
<Ref. to 6MT(diag)-50, DTC P1875 CIRCUIT OF CENTER DIFF., Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
24 Check Center Differential Control Dial
Open or short in the center differential control dial circuit.
<Ref. to 6MT(diag)-59, DTC 24 CHECK CENTER DIFFERENTIAL CONTROL DIAL, Diagnostic Procedure with Diagnostic Trouble Code
(DTC).>
25 DCCD CAN system circuit CAN communication circuit is open or shorted.
<Ref. to 6MT(diag)-35, DTC P1720 DCCD CAN SYSTEM CIRCUIT, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
26 DCCD engine rpm signal system Open or shorted engine speed
signal circuit
<Ref. to 6MT(diag)-37, DTC P1721 DCCD ENGINE RPM SIGNAL SYSTEM CIRCUIT, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
27 Yaw rate side G sensor reference system circuit
Open or short in the yaw rate & lateral G sensor reference circuit
<Ref. to 6MT(diag)-45, DTC P1765 YAW RATE SIDE G SENSOR REFERENCE SYSTEM CIRCUIT, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
28 Yaw rate sensor system circuit Open, short or stuck in the yaw
rate & lateral G sensor circuit
<Ref. to 6MT(diag)-42, DTC P1764 YAW RATE SENSOR SYSTEM CIRCUIT, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
29 DCCD Steering Angle Sensor Open, short or communication
failure of the steering angle sensor circuit
<Ref. to 6MT(diag)-48, DTC P1767 DCCD STEERING ANGLE SENSOR, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
31 Manual mode switch
Open or short in the manual mode switch circuit
<Ref. to 6MT(diag)-61, DTC 31 MANUAL MODE SWITCH, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
32 Check Parking Brake Switch
Open or short in the parking brake switch circuit
<Ref. to 6MT(diag)-64, DTC 32 CHECK PARKING BRAKE SWITCH, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
33 Stop Light Switch Circuit Range
Open or short in the stop light switch circuit
<Ref. to 6MT(diag)-33, DTC P1521 BRAKE SWITCH CIRCUIT RANGE, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
37 Neutral position switch
Open or short in the neutral position switch circuit
<Ref. to 6MT(diag)-67, DTC 37 NEUTRAL POSITION SWITCH, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
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Old 10-19-2007, 10:12 AM   #4
R & H Garage
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Join Date: Feb 2007
Chapter/Region: NWIC
Location: Seattle, WA (Green Lake)
Default

just a guess, but it seems the standard 'unplug the neg bat terminal and hold the brake for 30 years' technique should work.

Have you tried it?

You could always take off the terminal before bed and then re connect it before work. One word of caution however, you are going to have to use the key to lock the door!! I know, it's crazy.. a key.... We are such a lazy society.

That's some great info on the diagnostic procedures you posted up there. Thanks a ton. I'm going to bookmark that **** for sure.

-Dominic
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Old 11-08-2007, 11:45 PM   #5
Dave_MacKinnon
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2007 STi
Silver

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My bad for not closing this thread off.

The issue was 'logging too many paramaters' with Enginuity. Once you get the flashing ABS and lock ring, your DCCD controller goes offline. Disconnecting the battery does fix it.
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Old 11-09-2007, 05:14 AM   #6
Hyper
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1999 WRB GM6
2.34 LR destroker

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wow
usefull info
thanks!
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Old 11-01-2008, 03:31 PM   #7
nvrenufsti
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Join Date: Sep 2008
Chapter/Region: SCIC
Location: SCV, CA
Vehicle:
06 sti
Aspen white

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How would you run the trouble codes if your DCCD doesn't move out of full rear (and blinking) when the car is started? When the key is in the on position and not started you can go through the dccd settings.
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Old 04-28-2010, 07:12 PM   #8
flu1d
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Join Date: Feb 2007
Chapter/Region: MWSOC
Location: cleveland, oh
Vehicle:
07 STi
WRB

Default

I'm having a similar problem. I have some trouble codes showing up and was wondering if there is any software or procedure that will clear the DCCD ecu codes. I have an Access Port.

I really do not want to spend $100 at the dealership Thanks.
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Old 04-23-2013, 09:47 PM   #9
awakethroughmotion
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Chapter/Region: NWIC
Location: West Linn, Oregon
Vehicle:
06 wrb STi
2013 F150 XLT

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bump. any way to clear the codes other than stealership? i have 31,33,29,37 i think the codes just need to be cleared after i accidently drained the battery/
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Old 06-18-2015, 03:11 PM   #10
k3ogh_sti
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Location: England
Vehicle:
2005 widetrack sti
48w

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Mega thread revival! Did you manage to fix it, getting code 37 nps and it's still flashing ***55357;***56864;***55357;***56864;
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Old 06-23-2015, 01:59 AM   #11
Ramesh Kumar
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Member#: 424168
Join Date: Jun 2015
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Dear All,
I have a problem of communication of scanning tool with sti 2004. It
is showing communication with vehicle is lost . We modified sti. Currently it has only DCCD electronics unit with out any sensor and Auto/ manual switch. ABS and air bag also not installed. Only we have ABS electronic unit. Please suggest accordingly....
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Old 07-10-2015, 07:26 PM   #12
mrsaturn7085
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Join Date: Dec 2013
Chapter/Region: NWIC
Location: Portland, OR
Vehicle:
2006 Impreza WRX STI
WR Blue

Default

As long as someone revived a 7+ year old thread...

FreeSSM is the software you need to download.
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