SRT Performance Pages (2015-2016) - UConnect ReCoding Thoughts

[jroyk]

Interesting. My ‘16 M6 gauges agree like @BULL ’s, but the IAT always reads higher than I/C Coolant.

 

[fumanchu182]

It's been several years trying to figure this out but I was able to finally track down the issue with the Performance Pages Gauge 2 Dashboard swap.

I've got the coding problem figured out. The challenge is getting the UConnect software repackaged properly so the car will authenticate/take the update.

UConnect Versions
18.45.01 - September 24, 2019
17.43.01 - January 12, 2018
17.11.07 - April 5, 2017

--- This is when the Hellcat SRT Performance Pages Gauge 2 readings between I/C Coolant and Intake Air Temp swapped ---

16.16.13 - April 13, 2016
15.17.05 - April 24, 2015

Issue (2015-2016 Hellcats)
UConnect 17.11.07 introduced a change in how the Performance Pages resolved sensor data. The updated code mapped the Performance Pages’ temperature gauges to incorrect sensor URLs (e.g., "LTR_Coolant" and "IntkAirTempIntrClr") referenced in the I/C Coolant and Intake Air Temperature Dashboard Views, resulting in a mismatch between the displayed labels and the underlying CAN signals.

The instrument cluster was unaffected because it continued to reference the correct CAN sensor IDs. This is why cluster readings for I/C Coolant Temp and Intake Air Temp remained correct, while the Performance Pages began showing cross-mapped or inverted values starting in 17.11.07 and all later releases.

View attachment 174228

Potential Fix
Dodge needs to patch the Performance Pages App for 2015-2016 Hellcats with the following corrections to Gauges 2 Dashboard files.

File Location 2015 (LA Challenger):
UConnect 18.45.01 version > swdl.upd > secondary.iso > usr > share > xlets > kim_packages > KIM18 > xlets > 7DEC7834-535D-47B5-BD33-695477EDCD57 > prog > jars > GSkills_MY15_LSeries_v02.01.01_FIT.jar

File Location 2016 (LA Challenger, LD Charger):
UConnect 18.45.01 version > swdl.upd > secondary.iso > usr > share > xlets > kim_packages > KIM22 > xlets > 7DEC7834-535D-47B5-BD33-695477EDCD57 > prog > jars > GSkills_MY15_LSeries_v02.01.01_FIT.jar

Current in 18.45.01
IntakeAirTempDashboardView.class -> IntakeAirTempICSensorModel.getInstance()
CoolantTempICDashBoardView.class -> CoolantTempICSensorModel.getInstance()

Software Patch Needed (2015-2016 Hellcats only)
IntakeAirTempDashboardView.class -> CoolantTempICSensorModel.getInstance()
CoolantTempICDashBoardView.class -> IntakeAirTempICSensorModel.getInstance()

This is because the current CoolantTemplCSensorModel references "LTR_Coolant" and IntakeAirTempICSensorModel references "IntkAirTempIntrClr". When the wiring was changed from MAF to IAT sensor in 2017, the signal referenced by "LTR_Coolant" is now the post-intercooler charge air temperature, and the signal referenced by "IntkAirTempIntrClr" is the coolant temperature flowing through the low-temp coolant circuit and intercooler pump.

View attachment 174227

I reverse engineered the firmware. The package is signed with a key after the security incidents at Blackhat. The key is not publicly known.

 

[MikeD1]

Similarly, 2015 Challenger Hellcat with 18.45.01 reinstalled.

Also, nice catch @MikeD1 on the Gauges 1 page. Looks like we have Trans Temp sqweezed in there.

Yes, mine looks just like yours !

 

[rayzazoo]

Yes, mine looks just like yours !

Figured out the Guage 1 page difference.

Autos display Transmission Temperature, Manuals do not.


if (VehicleTrimEnum.HELLCAT == vehTrim) {
this._viewContainerList.add(OilTempDashboardView.getInstance());
this._viewContainerList.add(OilPressureDashboardView.getInstance());
this._viewContainerList.add(CoolantTempDashboardView.getInstance());
this._viewContainerList.add(BatteryDashboardView.getInstance());
if (TransmissionTypeEnum.AUTO == transmissionType) {
this._viewContainerList.add(TransTempDashboardView.getInstance());
}