Thread: DTC P1689 need a bit help

Results 1 to 20 of 20
  1. #1 DTC P1689 need a bit help 
    GrandPrix Junkie SDGTP99's Avatar
    Join Date
    May 2009
    Location
    Wichita
    Posts
    3,085
    Thanks (Received)
    1
    Likes (Received)
    5
    Dislikes (Received)
    1
    I thought I had this code taken care of. I cleaned the PCM & ABS connections on the wiring harness and the abs light went off. Then I cleared the p1689 code. Car ran great. Day later the code came back & it won't clear.
    OverKilled, HAI, Ported Throttle body, Ported intake, ZZP DP, Magnaflow, BMR ta's, GMPP STB's, CCS springs, tinted tailights, roof rails, TEP cool'r, G8 hood. Glass Gearbox.
    Reply With Quote  
     

  2. #2 Re: DTC P1689 need a bit help 
    Turbo is the way to go. BillBoost37's Avatar
    Join Date
    Jul 2009
    Location
    W Spfld
    Posts
    26,815
    Thanks (Received)
    53
    Likes (Received)
    90
    Dislikes (Received)
    1
    What's that code?
    I drink..so consider that when reading my posts.

    2010 Audi A6 Dual IC's
    Reply With Quote  
     

  3. #3 Re: DTC P1689 need a bit help 
    GrandPrix Junkie SDGTP99's Avatar
    Join Date
    May 2009
    Location
    Wichita
    Posts
    3,085
    Thanks (Received)
    1
    Likes (Received)
    5
    Dislikes (Received)
    1
    That's exactly what I said when it first popped up. It isn't in the Chilton manual so I had to Google it to find out what it was. Its a problem with PCM or PCM connection, ABS & the wiring between them. I thought the code was set by the loose connection at the ABS plug(Which was very dirty). I also cleaned up the connection plugs to the PCM. But the code came right back. However the ABS light did turn off after all the cleaning. I have checked out the code out at GearChatter & Ill admit I was confused on how tontroubleshoot the code. =\
    OverKilled, HAI, Ported Throttle body, Ported intake, ZZP DP, Magnaflow, BMR ta's, GMPP STB's, CCS springs, tinted tailights, roof rails, TEP cool'r, G8 hood. Glass Gearbox.
    Reply With Quote  
     

  4. #4  
    Awaiting Confirmation
    Join Date
    Jul 2009
    Location
    aowdnawi
    Posts
    23,292
    Thanks (Received)
    0
    Likes (Received)
    1
    Dislikes (Received)
    0
    Is it a class 2 data error?

    Supossedly those lines have connectors in them that corrode and fail.

    Have you traced the entire circuit?
    Reply With Quote  
     

  5. #5 Re: DTC P1689 need a bit help 
    GrandPrix Junkie SDGTP99's Avatar
    Join Date
    May 2009
    Location
    Wichita
    Posts
    3,085
    Thanks (Received)
    1
    Likes (Received)
    5
    Dislikes (Received)
    1
    Idk what a class 2 data error is & I haven't had time to trace all of those lines.
    OverKilled, HAI, Ported Throttle body, Ported intake, ZZP DP, Magnaflow, BMR ta's, GMPP STB's, CCS springs, tinted tailights, roof rails, TEP cool'r, G8 hood. Glass Gearbox.
    Reply With Quote  
     

  6. #6 Re: DTC P1689 need a bit help 
    Awaiting Confirmation
    Join Date
    Jul 2009
    Location
    aowdnawi
    Posts
    23,292
    Thanks (Received)
    0
    Likes (Received)
    1
    Dislikes (Received)
    0
    Reply With Quote  
     

  7. #7 Re: DTC P1689 need a bit help 
    GrandPrix Junkie SDGTP99's Avatar
    Join Date
    May 2009
    Location
    Wichita
    Posts
    3,085
    Thanks (Received)
    1
    Likes (Received)
    5
    Dislikes (Received)
    1
    ^^^No one there knew the answer either.
    OverKilled, HAI, Ported Throttle body, Ported intake, ZZP DP, Magnaflow, BMR ta's, GMPP STB's, CCS springs, tinted tailights, roof rails, TEP cool'r, G8 hood. Glass Gearbox.
    Reply With Quote  
     

  8. #8 Re: DTC P1689 need a bit help 
    GrandPrix Junkie SDGTP99's Avatar
    Join Date
    May 2009
    Location
    Wichita
    Posts
    3,085
    Thanks (Received)
    1
    Likes (Received)
    5
    Dislikes (Received)
    1
    Hmm, I don't have cruise control. I'm sure that's part of the DTC P1689. I checked the cruise control fuse and the wiring to cruise control & it all checks out. I haven't been able to find any bad wiring at all so far. Tommoro I'm going to try a different PCM and see if the code dissapears. After that idk what to do.
    OverKilled, HAI, Ported Throttle body, Ported intake, ZZP DP, Magnaflow, BMR ta's, GMPP STB's, CCS springs, tinted tailights, roof rails, TEP cool'r, G8 hood. Glass Gearbox.
    Reply With Quote  
     

  9. #9 Re: DTC P1689 need a bit help 
    GrandPrix Junkie SDGTP99's Avatar
    Join Date
    May 2009
    Location
    Wichita
    Posts
    3,085
    Thanks (Received)
    1
    Likes (Received)
    5
    Dislikes (Received)
    1
    Question. If my cruise control module is bad would that set the code p1689?
    OverKilled, HAI, Ported Throttle body, Ported intake, ZZP DP, Magnaflow, BMR ta's, GMPP STB's, CCS springs, tinted tailights, roof rails, TEP cool'r, G8 hood. Glass Gearbox.
    Reply With Quote  
     

  10. #10 Re: DTC P1689 need a bit help 
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
    Join Date
    Sep 2009
    Location
    Rogers, MN
    Posts
    21,022
    Thanks (Received)
    21
    Likes (Received)
    45
    Dislikes (Received)
    0
    Is your third brake light out by chance??

    Because that will make your cruise control not work.

    SMGPFC Member #1
    Reply With Quote  
     

  11. #11 Re: DTC P1689 need a bit help 
    GrandPrix Junkie SDGTP99's Avatar
    Join Date
    May 2009
    Location
    Wichita
    Posts
    3,085
    Thanks (Received)
    1
    Likes (Received)
    5
    Dislikes (Received)
    1
    Idk suppose I could check.
    OverKilled, HAI, Ported Throttle body, Ported intake, ZZP DP, Magnaflow, BMR ta's, GMPP STB's, CCS springs, tinted tailights, roof rails, TEP cool'r, G8 hood. Glass Gearbox.
    Reply With Quote  
     

  12. #12 Re: DTC P1689 need a bit help 
    Turbo is the way to go. BillBoost37's Avatar
    Join Date
    Jul 2009
    Location
    W Spfld
    Posts
    26,815
    Thanks (Received)
    53
    Likes (Received)
    90
    Dislikes (Received)
    1
    Can anyone copy and paste Gearchatter info here? I'm blind these days with things being blocked.
    I drink..so consider that when reading my posts.

    2010 Audi A6 Dual IC's
    Reply With Quote  
     

  13. #13 Re: DTC P1689 need a bit help 
    GrandPrix Junkie SDGTP99's Avatar
    Join Date
    May 2009
    Location
    Wichita
    Posts
    3,085
    Thanks (Received)
    1
    Likes (Received)
    5
    Dislikes (Received)
    1
    Already found and read the gear chatter link you previously posted about this DTC. Thx.
    OverKilled, HAI, Ported Throttle body, Ported intake, ZZP DP, Magnaflow, BMR ta's, GMPP STB's, CCS springs, tinted tailights, roof rails, TEP cool'r, G8 hood. Glass Gearbox.
    Reply With Quote  
     

  14. #14 Re: DTC P1689 need a bit help 
    GrandPrix Junkie SDGTP99's Avatar
    Join Date
    May 2009
    Location
    Wichita
    Posts
    3,085
    Thanks (Received)
    1
    Likes (Received)
    5
    Dislikes (Received)
    1
    The problem was a broken fasteners where the wiring harness connects to the EBCM. I switched out the broken part from my old harness and problem solved. And no I don't have a bulb out in my third brake light. Stoll no cruise control.
    OverKilled, HAI, Ported Throttle body, Ported intake, ZZP DP, Magnaflow, BMR ta's, GMPP STB's, CCS springs, tinted tailights, roof rails, TEP cool'r, G8 hood. Glass Gearbox.
    Reply With Quote  
     

  15. #15 Re: DTC P1689 need a bit help 
    Turbo is the way to go. BillBoost37's Avatar
    Join Date
    Jul 2009
    Location
    W Spfld
    Posts
    26,815
    Thanks (Received)
    53
    Likes (Received)
    90
    Dislikes (Received)
    1
    What's cruise doing? Cruise light even coming on like it's trying to engage?
    I drink..so consider that when reading my posts.

    2010 Audi A6 Dual IC's
    Reply With Quote  
     

  16. #16 Re: DTC P1689 need a bit help 
    GrandPrix Junkie SDGTP99's Avatar
    Join Date
    May 2009
    Location
    Wichita
    Posts
    3,085
    Thanks (Received)
    1
    Likes (Received)
    5
    Dislikes (Received)
    1
    No nothing happens. Nothing at all =|
    OverKilled, HAI, Ported Throttle body, Ported intake, ZZP DP, Magnaflow, BMR ta's, GMPP STB's, CCS springs, tinted tailights, roof rails, TEP cool'r, G8 hood. Glass Gearbox.
    Reply With Quote  
     

  17. #17 Re: DTC P1689 need a bit help 
    GrandPrix Junkie SDGTP99's Avatar
    Join Date
    May 2009
    Location
    Wichita
    Posts
    3,085
    Thanks (Received)
    1
    Likes (Received)
    5
    Dislikes (Received)
    1
    I've been driving my car about 2 weeks now. Today I got a DTC P1585 which is cruise control inhibit. No wonder I don't have cruise control.
    OverKilled, HAI, Ported Throttle body, Ported intake, ZZP DP, Magnaflow, BMR ta's, GMPP STB's, CCS springs, tinted tailights, roof rails, TEP cool'r, G8 hood. Glass Gearbox.
    Reply With Quote  
     

  18. #18 Re: DTC P1689 need a bit help 
    Turbo is the way to go. BillBoost37's Avatar
    Join Date
    Jul 2009
    Location
    W Spfld
    Posts
    26,815
    Thanks (Received)
    53
    Likes (Received)
    90
    Dislikes (Received)
    1
    Hmm but why ...lol Wish I could still see GC at work.
    I drink..so consider that when reading my posts.

    2010 Audi A6 Dual IC's
    Reply With Quote  
     

  19. #19 Re: DTC P1689 need a bit help 
    I live here. SlowNA06's Avatar
    Join Date
    Mar 2010
    Location
    Pennsylvania
    Posts
    5,928
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    GM Service Manual:
    DTC P1558 set indicates that an improper voltage level has been detected on the signal circuit which controls the cruise control inhibit circuit.
    The history DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.
    Step 1:
    Turn OFF the ignition.
    Disconnect the PCM harness connector.
    Turn ON the ignition, with the engine OFF.
    Using a DMM connected to a good ground, measure the voltage of the cruise control inhibit signal circuit. (B+... = "90V DC"?)



    1. If 90VDC, go to Step 2. If not, go to Step 3.

      Step 2:

      Turn OFF the ignition.
      Disconnect the cruise control module.
      Turn ON the ignition, with the engine OFF.
      Probe the cruise control inhibit signal circuit with a test lamp that is connected to a good ground.

      If it doesn't light up, inspect for poor connections at the harness connector of the PCM. If it lights up, inspect for poor connections at the harness connector of the cruise control module.

      Step 3.

      Test the cruise control inhibit signal circuit for a open, high resistance or short to ground.
      If the condition is there, inspect for poor connections at the harness connector of the cruise control module. Else, clear the DTC.
    Irridium spark plugs last 100k mi and work just as well as copper. Copper is a waste on N/A and only lasts 15k mi. Don't use Platinum.
    Use 195* tstat unless you can thoroughly explain why not; 99.9% don't need a lower temp.
    Almost any oil filter, ever, is of higher quality than ACDelco. Spend $6+.
    Reply With Quote  
     

  20. #20 Re: DTC P1689 need a bit help 
    GrandPrix Junkie SDGTP99's Avatar
    Join Date
    May 2009
    Location
    Wichita
    Posts
    3,085
    Thanks (Received)
    1
    Likes (Received)
    5
    Dislikes (Received)
    1
    Thx!
    OverKilled, HAI, Ported Throttle body, Ported intake, ZZP DP, Magnaflow, BMR ta's, GMPP STB's, CCS springs, tinted tailights, roof rails, TEP cool'r, G8 hood. Glass Gearbox.
    Reply With Quote  
     

Similar Threads

  1. P1689 Code & Runs Rough Over Half Throttle
    By SUPERCHARGED3800 in forum 3.8L V6 Supercharged (L67)(L32)
    Replies: 4
    Last Post: 03-06-2012, 04:27 PM
Tags for this Thread

View Tag Cloud

Bookmarks
Bookmarks
Posting Permissions
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •