Go directly to: Auto-Sport-Mode option?
As advertised, most Abarth owners agree that activating the Sport mode switch provides “an even more engaged driving experience”, as compared to the “Normal” mode that those of us driving Classicas and Lussos always experience. The primary programming changes that are activated within various modules in the vehicle, including the Engine Control Module (ECM or ECU or PCM – Powertrain Control Module), Transmission Control Module (TCM), Dynamic Stability Control/Traction Control Module (DSC/TCM) and the Power Steering Control Module (PSCM):
- sharper throttle response due to different ECU mappings of the throttle body and Multi-Air control of the inlet valves
- torque curve shifted lower in the power band in ECU due to allowing turbo boost at 2500 rpm, rather than at 3200 rpm
- automatic transmission shift calibrations are changed due to different TCM mappings, so that gears are held longer, and shifts are made quicker
- reduces the degree of electric power assist in the steering (heavier) due to different PSCM mappings, increasing steering feedback to the driver (along with a slight increase in effort)
- relaxed Dynamic Stability Control by adjusting the limits at which stability control intervenes
The switch (which pokes up through the bezel opening, but isn’t actually attached to the bezel) is connected electrically to the Instrument Cluster, and when engaged for about 2 seconds, triggers the Sport mode mappings within the aforementioned modules via the HS-CAN network. The ECU then triggers the Sport mode indicator light in the instrument cluster (as shown in the photo above), also via the HS-CAN network.
Assuming that the “Sport” indicator light exists in all of 124 Spider clusters, I’m curious as to whether the Sport mode:
- connection can be made to the instrument cluster in a Classica or Lusso (which connector and pin?) via our own (momentary-on) switch, or a console bezel and Sport switch (along with wiring harness) from an Abarth that incorporates the official switch
- whether that will actually trigger Sport mode in a Classica or Lusso
I wonder if a device to automatically engage Sport mode each time the car is started (if it was engaged when the vehicle’s engine was last turned off), could be developed.
I’ve learned today that some MX-5 Miatas (with the Skyactive-G 2.0) also feature a Sport Mode switch (it isn’t unique to the Abarth variant after all), and that the wiring diagrams in the MX-5 Service Manual have reflected this feature all along:
PCM actually triggers the Sport Mode light in the cluster, acknowledging activation
1. When the sports mode is selected (1) using the drive selection switch, the instrument cluster sends (2) a drive selection signal to the TCM and the PCM via CAN communication. When the PCM receives the drive selection signal, it sends (3) a select mode indication on request signal to the instrument cluster and displays the select mode indication (4).
2. When the TCM receives the drive selection signal, it changes (5) the shift point.
3. When the PCM receives the drive selection signal, it switches (6) the controls such as the throttle valve opening angle relative to the accelerator opening angle.
Drive selection switch inhibition conditions
- If any of the following conditions is met, the mode is not switched even if the drive selection switch is operated.
- During ABS/DSC/TCS control
- During sudden maneuvering
1. When the drive selection operation is performed (1), the instrument cluster sends (2) a drive selection signal to the PCM via CAN communication.
2. If the drive selection switch is operated with a drive selection switching inhibition condition met, the PCM sends (3) a select mode indication flash request signal to the instrument cluster.
3. The instrument cluster flashes (4) the select mode indication to notify the driver that drive selection is currently inhibited.
If someone could get there hands on the applicable CAN network commands, Sergey at mx5things.com could probably easily develop an “Auto-Sport Mode” plug-n-play solution to Torben’s request, by reprogramming his new Turn Signal reminder device to:
- remember the status of Sport mode at engine shutdown
- re-trigger Sport mode ON across HS-CAN, when restarting engine, if that was the status condition in memory
- should a non-Abarth cluster (with added switch connected) not be capable of triggering the other modules by sending the mode selection via the HS-CAN network (which I doubt), it could probably perform that function as well
- be programmed to interpret another CAN sequence (such as a long-press of DSC button, or a short-press of the TPMS switch) to toggle sport mode, so that this device would also be practical in non-Abarth vehicles, without even requiring the installation of the Sport mode switch!
…which would plug into the OBDII port, and also serves as a great footwell courtesy light as the driver’s door is opened.
I have Sergey’s Turn Signal Reminder device that plugs into the OBD2 port, and although it works great, if an Auto-Sport Mode device ever comes to fruition, I’d also buy it, and trade-off using them both (assuming he couldn’t combine the functions).