Clearing history codes
Thread Starter
Drifting
Joined: May 2007
Posts: 1,426
Likes: 165
From: Motor City
Clearing history codes
Is there a specific way to clear history codes?
My service ride control light is on, however I only have a history codes.
- Module 1: c12
- Module 4: H44 (lean o2 sensor)
- Module 9: H72 (serial data failure)
A vacuum leak was found so the lean condition should be fixed, but I have not figured out why H72 is set. Disconnecting the battery doesn't seem to clear the history codes.
My service ride control light is on, however I only have a history codes.
- Module 1: c12
- Module 4: H44 (lean o2 sensor)
- Module 9: H72 (serial data failure)
A vacuum leak was found so the lean condition should be fixed, but I have not figured out why H72 is set. Disconnecting the battery doesn't seem to clear the history codes.
Team Owner
Joined: Sep 2003
Posts: 25,394
Likes: 2,741
Module 9 is ABS/ASR? I don't believe AZ can do that for any. If it is actually module 9 and the clearing doesn't work using the DIC procedure and you don't have an ABS/ASR IND light - why be concerned? It's history.
RIDE CONTROL isn't diagnosed in or by the DIC and that requires a completely different procedure.
Last edited by WVZR-1; Aug 12, 2015 at 11:08 AM.
Racer
Joined: Mar 2014
Posts: 267
Likes: 24
From: Montevideo, Uruguay
With the paper clip jumping A and G in the ALDL, try this:
When the codes sequence ends, press the TRIP RESET button until 4.0 is displayed in the module number area. Then press the TRIP/ODO button until 4.7 is displayed in the module number area. Press and hold the ENG/MET button until “—“ is displayed. This will clear any ECM codes.
Then press the TRIP RESET button until 9.0 is displayed in the module number area. Press the TRIP/ODO button until “9.7″ is displayed in the module number area. Press and hold the ENG/MET button until “—“ is displayed. This will clear any ABS/ASR codes.
Turn the key off, wait ten seconds, turn the key back on and check for any codes.
When the codes sequence ends, press the TRIP RESET button until 4.0 is displayed in the module number area. Then press the TRIP/ODO button until 4.7 is displayed in the module number area. Press and hold the ENG/MET button until “—“ is displayed. This will clear any ECM codes.
Then press the TRIP RESET button until 9.0 is displayed in the module number area. Press the TRIP/ODO button until “9.7″ is displayed in the module number area. Press and hold the ENG/MET button until “—“ is displayed. This will clear any ABS/ASR codes.
Turn the key off, wait ten seconds, turn the key back on and check for any codes.
Thread Starter
Drifting
Joined: May 2007
Posts: 1,426
Likes: 165
From: Motor City
Pulling the battery cable did not reset the history codes, tried that several times. Autozone? I would trust those guys to even hook up a scanner to my car.... 
WVZR, thanks....I found the procedure on how to pull SRC codes. Basically grounding pin C on the ALDL and counting the flashes of the SRC light.
Pifo, i'll try this when I get home from work later thanks for your help!
WVZR, thanks....I found the procedure on how to pull SRC codes. Basically grounding pin C on the ALDL and counting the flashes of the SRC light.
Pifo, i'll try this when I get home from work later thanks for your help!
Advanced
Joined: Sep 2012
Posts: 54
Likes: 3
From: Blairsville, Georgia
check out this web site on C4 Diagnostic trouble codes...
http://tech.corvettecentral.com/2011...trouble-codes/
http://tech.corvettecentral.com/2011...trouble-codes/
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Cruising
Joined: Aug 2015
Posts: 11
Likes: 0
Try O'reilly's. They had an OBD1 scanner, and believe it or not, seemed to know what they were doing with it! I hate most chain stores, but O'reilly's does alright by me.
They were unable to clear any codes though. The scanner said something about requiring a specific procedure involving a fuse. I checked online, but couldn't seem to find what it was talking about.
From what I've researched, just disconnecting the battery for at least 10 seconds should do the trick. I'm interested to see what you find. Good luck!
They were unable to clear any codes though. The scanner said something about requiring a specific procedure involving a fuse. I checked online, but couldn't seem to find what it was talking about.
From what I've researched, just disconnecting the battery for at least 10 seconds should do the trick. I'm interested to see what you find. Good luck!
Melting Slicks
Joined: Jul 2011
Posts: 2,605
Likes: 202
From: Trinity FL
With the paper clip jumping A and G in the ALDL, try this:
When the codes sequence ends, press the TRIP RESET button until 4.0 is displayed in the module number area. Then press the TRIP/ODO button until 4.7 is displayed in the module number area. Press and hold the ENG/MET button until “—“ is displayed. This will clear any ECM codes.
Then press the TRIP RESET button until 9.0 is displayed in the module number area. Press the TRIP/ODO button until “9.7″ is displayed in the module number area. Press and hold the ENG/MET button until “—“ is displayed. This will clear any ABS/ASR codes.
Turn the key off, wait ten seconds, turn the key back on and check for any codes.
When the codes sequence ends, press the TRIP RESET button until 4.0 is displayed in the module number area. Then press the TRIP/ODO button until 4.7 is displayed in the module number area. Press and hold the ENG/MET button until “—“ is displayed. This will clear any ECM codes.
Then press the TRIP RESET button until 9.0 is displayed in the module number area. Press the TRIP/ODO button until “9.7″ is displayed in the module number area. Press and hold the ENG/MET button until “—“ is displayed. This will clear any ABS/ASR codes.
Turn the key off, wait ten seconds, turn the key back on and check for any codes.
Thread Starter
Drifting
Joined: May 2007
Posts: 1,426
Likes: 165
From: Motor City
Thanks to the forum, the codes are cleared. Pifo's method worked flawlessly and honestly I should have read the FSM more carefully, it was in there.
SRC was diagnosed to be:
-code 23 (loss of speed singal) which is triggered by the key being cycled on/off 3 times with no start.
- code 31 (left front out of position).
I'll dive into 31 when I get some time, but at least it's running good in the meantime
SRC was diagnosed to be:
-code 23 (loss of speed singal) which is triggered by the key being cycled on/off 3 times with no start.
- code 31 (left front out of position).
I'll dive into 31 when I get some time, but at least it's running good in the meantime
Racer
Joined: Mar 2014
Posts: 267
Likes: 24
From: Montevideo, Uruguay
Thanks to the forum, the codes are cleared. Pifo's method worked flawlessly and honestly I should have read the FSM more carefully, it was in there.
SRC was diagnosed to be:
-code 23 (loss of speed singal) which is triggered by the key being cycled on/off 3 times with no start.
- code 31 (left front out of position).
I'll dive into 31 when I get some time, but at least it's running good in the meantime
SRC was diagnosed to be:
-code 23 (loss of speed singal) which is triggered by the key being cycled on/off 3 times with no start.
- code 31 (left front out of position).
I'll dive into 31 when I get some time, but at least it's running good in the meantime
Cruising
Joined: Aug 2015
Posts: 11
Likes: 0
Thanks to the forum, the codes are cleared. Pifo's method worked flawlessly and honestly I should have read the FSM more carefully, it was in there.
SRC was diagnosed to be:
-code 23 (loss of speed singal) which is triggered by the key being cycled on/off 3 times with no start.
- code 31 (left front out of position).
I'll dive into 31 when I get some time, but at least it's running good in the meantime
SRC was diagnosed to be:
-code 23 (loss of speed singal) which is triggered by the key being cycled on/off 3 times with no start.
- code 31 (left front out of position).
I'll dive into 31 when I get some time, but at least it's running good in the meantime
Racer
Joined: Mar 2014
Posts: 267
Likes: 24
From: Montevideo, Uruguay
Cruising
Joined: Aug 2015
Posts: 11
Likes: 0
Team Owner
Joined: Sep 2003
Posts: 25,394
Likes: 2,741
Don't just randomly start "jumping things" or attempting anything that you've only read and maybe wasn't mentioned to be MY applicable.
MY - Model Year
WAG's can get you much deeper than you likely are
WAG - Wild A$$'d Guess
MY - Model Year
WAG's can get you much deeper than you likely are
WAG - Wild A$$'d Guess
Drifting
Joined: Sep 2014
Posts: 1,579
Likes: 59
From: Trieste Italy
Is there a specific way to clear history codes?
My service ride control light is on, however I only have a history codes.
- Module 1: c12
- Module 4: H44 (lean o2 sensor)
- Module 9: H72 (serial data failure)
A vacuum leak was found so the lean condition should be fixed, but I have not figured out why H72 is set. Disconnecting the battery doesn't seem to clear the history codes.
My service ride control light is on, however I only have a history codes.
- Module 1: c12
- Module 4: H44 (lean o2 sensor)
- Module 9: H72 (serial data failure)
A vacuum leak was found so the lean condition should be fixed, but I have not figured out why H72 is set. Disconnecting the battery doesn't seem to clear the history codes.