Results 1 to 9 of 9

Thread: VCM not found on 1999 camaro

  1. 01-21-2014 #1
    98hc4mula
    98hc4mula is offline
    Tuner
    Join Date
    Dec 2010
    Location
    Fort Worth, Tx
    Posts
    104

    VCM not found on 1999 camaro

    I cannot connect my HP tuner to the OBDII port…
    it shows an error
    cannot connect to VCM

    I verified continuity to the port from the BUS PCM pin out to #2 on OBDII plug
    I verified it is receiving a 12 volt signal. it has power.
    grounds check out ok.
    radio fuse check out ok. actually placed a new one there.
    HPT plug lights up showing it has power.
    check it with a 12v test light and is working as well.

    the car currently has a no spark condition I am trying to diagnose as well if that makes any sense. see below about what I have checked


    Im at a loss….
    car actually started about 3 months ago. I have not started it and now that a I want to move it to the garage it will not start nor connect to the HPtunner


    I have been chasing a no spark condition on my camaro for a while.
    I have done a lot of troubleshooting and everything is coming out fine
    things I did

    verified the PCM is grounded
    verified the PCM is receiving 12 v
    verified its sending a 12v signal to the fuel pump.
    new ignition relay, swapped it out with another one already as well
    checked the coolant temp sensor. appears intact. I took it out and inspected it as well. no codes can be read bc I cannot connect my HP runners to the car. see below for this issue……...
    all grounds check out ok
    battery fully charged.
    coils are receiving power at the plugs on both sides

    PLEASE HELP me…….
    Reply With Quote Reply With Quote
  2. 01-21-2014 #2
    Bill@HPTuners
    Bill@HPTuners is offline
    HP Tuners Support
    (foff667)     Bill@HPTuners's Avatar
    Join Date
    Jun 2004
    Location
    Hailing from Parts Unknown
    Posts
    28,266
    could be a vpw chip issue, try connecting your hptuners interface to a similar gen 3 car or truck to see if you have the same issue, if so its almost certainly a obd2 cable or vpw chip issue.
    It doesn't have to be perfect, it just needs to be done in two weeks...

    A wise man once said "google it"
    Reply With Quote Reply With Quote
  3. 01-21-2014 #3
    98hc4mula
    98hc4mula is offline
    Tuner
    Join Date
    Dec 2010
    Location
    Fort Worth, Tx
    Posts
    104
    I try connecting to my TBSS w no problems. Do I need to specifically try a gen 3car.? If so. I'll try tomorrow.
    As far as I know the above is all u need to be able to connect right?
    Reply With Quote Reply With Quote
  4. 01-21-2014 #4
    Bill@HPTuners
    Bill@HPTuners is offline
    HP Tuners Support
    (foff667)     Bill@HPTuners's Avatar
    Join Date
    Jun 2004
    Location
    Hailing from Parts Unknown
    Posts
    28,266
    Yes, gen 4 is can, uses a different chip. Gen 3 is vpw
    It doesn't have to be perfect, it just needs to be done in two weeks...

    A wise man once said "google it"
    Reply With Quote Reply With Quote
  5. 01-21-2014 #5
    98hc4mula
    98hc4mula is offline
    Tuner
    Join Date
    Dec 2010
    Location
    Fort Worth, Tx
    Posts
    104
    So what would I have to do in order to fix that if that was the case.?
    Reply With Quote Reply With Quote
  6. 01-21-2014 #6
    Bill@HPTuners
    Bill@HPTuners is offline
    HP Tuners Support
    (foff667)     Bill@HPTuners's Avatar
    Join Date
    Jun 2004
    Location
    Hailing from Parts Unknown
    Posts
    28,266
    You would contact support via email and we will instruct you.
    It doesn't have to be perfect, it just needs to be done in two weeks...

    A wise man once said "google it"
    Reply With Quote Reply With Quote
  7. 01-22-2014 #7
    planethax
    planethax is offline
    Senior Tuner
    Join Date
    Dec 2009
    Posts
    1,084
    Does the MIL turn on during bulb check?
    Try a cheap OBDII reader to see if it will connect and pull codes.
    Reply With Quote Reply With Quote
  8. 01-22-2014 #8
    98hc4mula
    98hc4mula is offline
    Tuner
    Join Date
    Dec 2010
    Location
    Fort Worth, Tx
    Posts
    104
    Figured it out. I took the pcm to my buddy and hooked it up to his ta. Same deal. Csnnot locate vcm. Hp tuners worked on his pcm w/o issues. I have a bad pcm.
    Now. Where can I get a hold of one for a 99 camaro w the A4 transmission?
    Reply With Quote Reply With Quote
  9. 01-22-2014 #9
    BLK01Z28
    BLK01Z28 is offline
    Potential Tuner
    Join Date
    Jan 2011
    Posts
    5
    Try tunebyfrost of something like that. Google it. Also LSXpowertuning.com
    Reply With Quote Reply With Quote
« Previous Thread | Next Thread »