TunerPro comprehensive XDF for 0411 PCM - with Checksums

[Scott68B]

Thank you for the response, I really appreciate it!Yes, it is manual transmission tune but I don't have a switch on the clutch. I'm right in the middle of installing factory cruise in the car so maybe i can double purpose the clutch switch I'll be installing. Would I wire that to pin 79 on the blue connector? I wonder if just doing that would make a change?Thanks againScott

[LRT]

C1 (Blue) pin 79 is the Skip Shift Solenoid Control; which can cause the first to fourth shift with the T56 transmission.


Clutch Switch(es)

These were used by the OEM for Starting, Cruise Control Release, and Clutch Anticipate.

The Clutch Pedal Position (CPP) Switch or Clutch Anticipate Switch is a normally closed circuit (foot off of the clutch pedal). When the clutch is applied (pedal depressed) this circuit opens (i.e. no current flow).

One side of this switch is wired to ground. The other side of this switch is wired to PCM C1 (Blue) pin 32. The PCM outputs voltage on this circuit.


Cruise Control Module (DBC style)

Camaro versions use a Cruise Control Inhibit Signal, between the PCM and the Cruise Control Module. Truck versions do not.

If you use a Camaro module, then Cruise Control could be inhibited by the PCM for various reasons. I would recommend using a Truck Cruise Control Module.

Both of these modules (Camaro or Truck) use a Cruise Control Release Signal (normally closed 12 volt) and a Brake / Stoplamp Signal (normally open 12 volt). You must use both of these, and the module must "see" the simultaneous reverse logic, or it will inhibit Cruise Control.

The DBC style Cruise Control Modules also require a 4K PPM VSS signal. You can splice into the signal from the PCM to the Speedometer (this is what the OEM did), or repurpose the 128K PPM VSS signal from the PCM (normally connected to the ABS brake system), and change the output to 4K PPM with tuning software.

Just an overview ...