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Old 05-25-2002, 11:38 AM   #1
Austin
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Default How to Read ABS Trouble Codes

The diagnosis connector is a black connector, and the two diagnosis terminal pins have red/black wires.
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Old 05-25-2002, 11:39 AM   #2
Austin
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Sample codes.
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Old 05-25-2002, 11:40 AM   #3
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How to clear codes.
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Old 05-25-2002, 11:42 AM   #4
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Indicates cleared.
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Old 05-25-2002, 11:43 AM   #5
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Diagnostic plug blow-up.
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Old 05-25-2002, 11:48 AM   #6
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ABS DTC list

11 Start Code, DTC is shown after start code, Only start code is shown in normal condition

Abnormal ABS sensor, open circuit or voltage too high
21 front right ABS sensor
23 front left ABS sensor
25 rear right ABS sensor
27 rear left ABS sensor

Abnormal ABS sensor, abnormal ABS sensor signal
22 front right ABS sensor
24 front left ABS sensor
26 rear right ABS sensor
28 rear left ABS sensor
29 any one of four

Abnormal solenoid valve circuits in ABS control module and hydraulic unit
31 Front right inlet valve
32 Front right outlet valve
33 Front left inlet valve
34 Front left outlet valve
35 Rear right inlet valve
36 Rear right outlet valve
37 Rear left inlet valve
38 Rear left outlet valve

41 Abnormal ABS control module
42 Source voltage is abnormal
44 A combination of AT control abnormal
51 Abnormal valve relay
52 Abnormal motor and/or motor relay
54 Abnormal stop light switch
56 Abnormal G sensor output voltage

Last edited by Austin; 05-25-2002 at 12:13 PM.
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Old 05-28-2002, 11:47 AM   #7
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^^^
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Old 10-25-2002, 08:20 AM   #8
romanom
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free bump
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Old 10-25-2002, 09:09 AM   #9
Austin
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That's a big bump.
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Old 11-03-2002, 05:11 AM   #10
ScoobyJoe
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ok two questions may be dumb but here it goes which of the two terminal pins goes in terminal 6 and also why is the 3 terminal shown...Thanks my abs light is on and i don't know why?
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Old 06-15-2003, 11:12 PM   #11
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Bump again.
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Old 06-16-2003, 06:46 PM   #12
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So complicated, for me I just look under the passenger seat and lift a small strip of carpet. The little red light flashes the codes all the time.
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Old 06-17-2003, 09:14 AM   #13
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Quote:
Originally posted by ciper
So complicated, for me I just look under the passenger seat and lift a small strip of carpet. The little red light flashes the codes all the time.
Made me look!!
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Old 01-18-2005, 11:31 AM   #14
Kyle 2.5RS
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Are the diagnosis terminal pins already located in the car near the connector?
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Old 09-29-2005, 01:50 PM   #15
DonkeyPunch
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Please update and clarify this. Do you need to make the connectors. Are these connectors just a jumper, and we are supposed to watch the ABS light flash on and off? Are the connectors already under the dash in the car?? Do you you an diagnostic code scanner like autoxray? I ask becuase a friend has a problem with his ABS all of a sudden, and want to scan it. This is a great thread so far.

DP
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Old 01-27-2006, 03:05 AM   #16
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Can anyone help me find this connector on my '05 WRX Wagon.

The free black connector does not seen to exist behind the fuse boxes under the dash.

I did find a grey connector with 2 leads in the harness up and to the right of the OBD2 port. It is actually mounted to the dash facing down towards the pedals.

I would purchase the FSM, but it doesnt seem worth it for a small problem like this.

Last edited by moxie; 01-27-2006 at 03:41 AM.
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Old 05-04-2006, 03:31 AM   #17
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bumb for questions
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Old 05-04-2006, 04:31 AM   #18
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Quote:
Originally Posted by moxie
Can anyone help me find this connector on my '05 WRX Wagon.

The free black connector does not seen to exist behind the fuse boxes under the dash.

I did find a grey connector with 2 leads in the harness up and to the right of the OBD2 port. It is actually mounted to the dash facing down towards the pedals.

I would purchase the FSM, but it doesnt seem worth it for a small problem like this.
I just looked at my FSM, and the '05 seems to require the Subaru Select Monitor to be hooked up to the ODB2 port.



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Old 06-08-2007, 08:11 PM   #19
greasy rocker
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well I have searched all of the Subaru forums that I know and this appears to be the only thread about ABS codes. CAn anyone answer some of the questions already posted?

e.g. where is the connector on a 99 RS and should we be looking at the ABS light to get the code.

Thanks to anyone who can fill in the last couple of details.
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Old 08-05-2007, 02:22 PM   #20
nkodemus82
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Thumbs up been there, done that. saved some dough.

My notes on the procedure:

I just went through the procedure and was surprised at how much it resembled pulling an old-school OBD code.

Turn the vehicle off.

The diagnostic terminals (those two metal prongs) are tucked back into the wrapped cable the the diagnostic connector stems from. You can see two little black wires coming out near the diagnostic connector and then looping back into that wrapped cable. Pull one of them out and plug it into terminal #6 on the black plug that is the ABS diagnostic connector.

Once you have done this. turn the key to the run/on position. Don't start it, just turn it to run. The ABS light will flash some codes. If your situation is similar to mine, there will be many flashes to try and keep track of. Don't worry, you'll get lots of chances to see the same three codes. The two that flashed for me were 51 and 56. They display like morse code. Because I enjoy morse code, consider a dash a long flash and a dot a short flash. There will be a start code, it will be dash dot.

0. There is a very short flash when you first turn the key on. This goes away and then the next code is the "start code" that says what comes next is your DTCs.
1. dash dot - start code
2. short pause
3. dash dash dash dash dash dot dot dot dot dot dot - ABNORMAL G SENSOR OUTPUT VOLTAGE
4. short pause
5. dash dash dash dash dash dot - ABNORMAL VALVE RELAY
6. short pause
start back at 1 and repeat a bunch of times.

These are the two codes that were stored. At the time that I pulled them, the ABS light was not on. It went off after the previous restart of the vehicle. The thrown codes are stored in the ABS Control Module until they are cleared manually. The most recent three codes are stored in a ring buffer, meaning the oldest codes are overwritten as new codes are thrown.

Now I have what I need to diagnose further what the G Sensor and Valve operation problems may be.

I didn't do it yet, but you can clear the stored DTC's with a procedure that was posted earlier by Austin involving plugging and unplugging the diagnostic terminal from the diagnostic connector several times within a specified time frame, with a specified minimum duration for each connection iteration.

Have fun. Don't kill yourself. Ask questions if you're not sure what you're doing.

-jonathan
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Old 09-09-2007, 11:07 PM   #21
BillsWRX
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Smile

Thanks to Austin and nkodemus82 for their detailed and very helpful posts. My DTC was 22, front right ABS wheel speed sensor. I measured the resistance of this sensor, and it was outside spec (per service manual), so I'll be ordering a new one.

As for earlier questions on which terminal is which, I don't think it matters. The first one I tried worked.
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Old 09-21-2007, 10:09 PM   #22
BillsWRX
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Ok I've successfully installed the replacement part, and cleared the code using the sequence above. Very happy - thanks once again.
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Old 10-26-2007, 01:06 PM   #23
rjp98outlook
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Default ABS codes for 2002 Outback (Also, why do the dash lights dim when I hit the brakes?)

Quote:
Originally Posted by nkodemus82 View Post
My notes on the procedure:

I just went through the procedure and was surprised at how much it resembled pulling an old-school OBD code.

Turn the vehicle off.

The diagnostic terminals (those two metal prongs) are tucked back into the wrapped cable the the diagnostic connector stems from. You can see two little black wires coming out near the diagnostic connector and then looping back into that wrapped cable. Pull one of them out and plug it into terminal #6 on the black plug that is the ABS diagnostic connector.

Once you have done this. turn the key to the run/on position. Don't start it, just turn it to run. The ABS light will flash some codes. If your situation is similar to mine, there will be many flashes to try and keep track of. Don't worry, you'll get lots of chances to see the same three codes. The two that flashed for me were 51 and 56. They display like morse code. Because I enjoy morse code, consider a dash a long flash and a dot a short flash. There will be a start code, it will be dash dot.

0. There is a very short flash when you first turn the key on. This goes away and then the next code is the "start code" that says what comes next is your DTCs.
1. dash dot - start code
2. short pause
3. dash dash dash dash dash dot dot dot dot dot dot - ABNORMAL G SENSOR OUTPUT VOLTAGE
4. short pause
5. dash dash dash dash dash dot - ABNORMAL VALVE RELAY
6. short pause
start back at 1 and repeat a bunch of times.

These are the two codes that were stored. At the time that I pulled them, the ABS light was not on. It went off after the previous restart of the vehicle. The thrown codes are stored in the ABS Control Module until they are cleared manually. The most recent three codes are stored in a ring buffer, meaning the oldest codes are overwritten as new codes are thrown.

Now I have what I need to diagnose further what the G Sensor and Valve operation problems may be.

I didn't do it yet, but you can clear the stored DTC's with a procedure that was posted earlier by Austin involving plugging and unplugging the diagnostic terminal from the diagnostic connector several times within a specified time frame, with a specified minimum duration for each connection iteration.

Have fun. Don't kill yourself. Ask questions if you're not sure what you're doing.

-jonathan
I have an ABS light that comes on every once in a while while driving and I would like to read the codes. It seems Subaru has used many different ABS systems over the years. Does the above procedure apply to an 02 outback?Interestingly, when the ABS light is on I notice that the radio and dash lights dim when I step on the brakes. Is this normal? I am wondering if this is supposed to be an additional alert mechanism, or if ther is an electrical problem somewhere.THanks for any help,Rich
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Old 12-02-2007, 08:14 PM   #24
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whoever posted this thread can burn in hell
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Old 12-02-2007, 10:52 PM   #25
Dracord
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Quote:
Originally Posted by DayOfPain View Post
whoever posted this thread can burn in hell
?? Not applicable for all subarus?
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