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|Advanced Safety Control Module||ASCM||Car computer/module that does sensor fusion from Radar and Camera to create ACC and LKA messages to PCM (powertrain control module). Typically located in the trunk.|
|Calibration||n/a||Packaged adjustments to running parameters of firmware running on GM vehicles. Updates available from SPS within TIS2Web|
|Firmware||n/a||Base operating system for various devices throughout the vehicle. Updates available from SPS within TIS2Web|
|GDS2||Global Diagnostic System 2||GM system for advanced diagnostics and firmware flashing|
|GMLAN||GM Local Area Network||Single wire propriety interface present on the CAN connector in GM vehicles.|
|MDI||Multiple Diagnostic Interface||GM service device connecting the vehicle to a computer. Lower price generics exist such as vxdiag.|
|SPS||Service Programming System||Firmware and calibrations within the TIS2Web application. Updates can be seen for vehicles by VIN without cost here.|
|Tech2Win||Tech2 for Windows||Emulated legacy diagnostic interfaces for Windows. Runs in an emulated terminal.|
|TIS2Web||Techline Information System||ACDelco site providing diagnostics and firmware for cars on a subscription basis. Interacts with vehicle via GM MDI. Java webstart application.|
The GM RPO code for
CRUISE CONTROL AUTOMATIC, ADAPTIVE WITH STOP/GO is
KSG. Most GM 2016-2020 vehicles with ACC, LKA can be supported.
Radar is behind flat Chevy logo:
ASCM in the trunk:
Any GM vehicle 2016+ with front camera and LKA. These will only have ALC, not ACC. With a comma pedal, limited ACC is possible using Low gear. Find a way to control friction brakes!
For the Chevy Bolt specifically, see the openpilot Bolt wiki.
First engage must be above 18 mph.
All: Below 8 mph, LKA steering is unavailable.
2017: 18 mph longitudinal control, although 0 mph often works, but sometimes cruise faults.
2018+: 0 mph longitudinal control
2017: Auto-resumes from stop at 0mph.
2018+: Must press RESUME to resume from stop.
ASCM 14-pin stub
Connect switched +12V (e.g. ignition on, rearview mirror connector or driver fusebox) to pin 9 (radar power) of cam connector. This will turn on the front radar when the car is powered on.
Original instructions from Zoneos
Map OBD-II to OBD-C female (at comma two) schematic
This requires the panda intercept relays panda to be disabled:
case SAFETY_GM:fall-through after
|B8||SBU2 1kΩ to GND|