Results 1 to 7 of 7

Thread: Engine DTC Processing Differences in Tune File

  1. #1
    Member
    Join Date
    Jun 2014
    Posts
    56

    Default Engine DTC Processing Differences in Tune File

    I noticed a difference in the DTC Processing between the factory tune and dyno tune files on my LS1B 2000 Corvette. Should it be corrected?

    Here are the differences:

    In the Factory Tune, Missing from Dyno Tune
    P0441 Evaporative Emission (EVAP) System No Flow During Purge
    P1222 Injector Circuit Intermittent - Cylinder 1
    P1442 EVAP Purge Solenoid Diagnostic Vacuum Switch
    P1513 Traction Control Drag Reduction Request Circuit
    P1545 Air Conditioning (A/C) Clutch Feedback Circuit Low Voltage

    Not Part of Factory Tune but Appears in Dyno Tune
    P0116 Engine Coolant Temperature (ECT) Sensor Performance
    P0128 Engine Coolant Temperature (ECT) Below Thermostat Regulating Temperature
    P0700 Transmission Control Module (TCM) Requested MIL Illumination
    P0752 Shift Solenoid Valve A Stuck On
    P0757 Shift Solenoid Valve B Stuck On
    P1345 Crankshaft Position (CKP)-Camshaft Position (CMP) Correlation
    P1527 Transmission Range (TR) to Pressure Switch Correlation
    P1683 Control Module Ignition Off Timer Performance
    P1688 Unmanaged Engine Torque Delivered to TCM Signal
    P1781 Transmission Control Module (TCM) MIL Request Circuit
    P1815 Transmission Range Switch Does Not Indicate Park/Neutral (P/N) During Start
    P1819 Internal Mode Switch-No Start/Wrong Range
    P1820 Internal Mode Switch A Circuit Low Voltage
    P1822 Internal Mode Switch B Circuit High Voltage
    P1823 Internal Mode Switch P Circuit Low Voltage
    P1825 Internal Mode Switch-Invalid Range
    P1826 Internal Mode Switch C Circuit High Voltage
    U1024 Lost Communications With Transmission Controller - Device $18
    U1192 Lost Communications With Security Controller - Device $C0
    U1193 Lost Communications With Security Controller - Device $C1

    Thanks!

  2. #2
    Joe (Moderator) joecar's Avatar
    Join Date
    Apr 2003
    Posts
    27,610

    Default

    By missing you mean disabled, and by appears you mean enabled...?

    Where is your geographic location (in which country/state do you drive your C5)...? Do you drive it on the street...?

    Do you have EVAP system physically present...?

    What about AC...?

    Did you recently get your transmission rebuilt...? Did they edit the tune ahead of the dyno tuner...?

    You could ask the dyno tuner if he had specific reasons for disabling or enabling those particular DTC's.

  3. #3
    Lifetime Member Team208Motorsports's Avatar
    Join Date
    Dec 2014
    Posts
    216

    Default

    Sounds like he flashed a canned base setup....

  4. #4
    Member
    Join Date
    Jun 2014
    Posts
    56

    Default

    I would imagine he did start by flashing a tune from a car with similar mods. Just wasn't sure if it was something that should be corrected (and if so how would I do it)?

    Joe, enable / disable?? I don't know how to do that? No response from the tuner when I asked about it. I'm just looking at the two tunes in V7.5. Car is in US, non-emissions. No work to the trans, still has AC. If we look at the AC, the following appear in the factory tune:

    P1539 Air Conditioning (A/C) Clutch Feedback Circuit High Voltage
    P1546 Air Conditioning (A/C) Clutch Feedback Circuit Open

    This appears in the dyno tune:
    P1539 Air Conditioning (A/C) Clutch Feedback Circuit High Voltage
    P1545 Air Conditioning (A/C) Clutch Feedback Circuit Low Voltage
    P1546 Air Conditioning (A/C) Clutch Feedback Circuit Open


    Thanks

  5. #5
    Joe (Moderator) joecar's Avatar
    Join Date
    Apr 2003
    Posts
    27,610

    Default

    It sounds like what Team208 said.


    In table C6001 each DTC can have one of 4 settings: 1-Trip, 2-Trip, Non-Emissions, Not-Reported.

    Enabled is either of the first three. Disabled is the last one.

  6. #6
    Member
    Join Date
    Jun 2014
    Posts
    56

    Default

    But how would you add something that doesn't even appear in the list?

  7. #7
    Joe (Moderator) joecar's Avatar
    Join Date
    Apr 2003
    Posts
    27,610

    Default

    You mean tables C6001 and C6002 did not have those DTC's...?

    If that is the case then the tuner flashed in a different OS.

Similar Threads

  1. DTC Processing Enablers?
    By 67SS509 in forum General (Petrol, Gas, Ethanol)
    Replies: 1
    Last Post: September 25th, 2015, 06:51 AM
  2. Replies: 1
    Last Post: July 28th, 2013, 04:12 PM
  3. DTC and MIL Fault Processing tables not accessible in 2010 and up T43s
    By whypave in forum 6 speed/8 speed RWD/FWD Transmission Tuning (incl T43, T76, T87)
    Replies: 4
    Last Post: January 26th, 2012, 11:55 AM
  4. DTC differences on compare
    By killerbee in forum General (Diesel)
    Replies: 2
    Last Post: August 18th, 2010, 03:11 PM
  5. Engine Underboost DTC?
    By LBZoom in forum Duramax 06 LLY / 06+ LBZ & LMM
    Replies: 5
    Last Post: July 15th, 2008, 05:41 AM

Posting Permissions

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