GM Volt

Bus Connections
The primary OBD-II connector on the driver's side hosts the following buses:

Additionally, the second connector, located on the passenger's side, hosts the following:

Finally, a 10.417 Kbit/s LIN bus is used to connect together the Body Control Module, window motors and switches, and the wiper motor. Another LIN bus appears to connect the HVAC controls back to the HVAC system.

Also see this page.

Volt Data
The volt is based on the GM Global A platform, but has some special modules installed and PIDs available specifically for the battery, charger, and motor electronics. These are documented in part below.

Live Data (Module-to-Module) from Primary High speed GMLAN
0C9 Byte 5 Accelerator 0 (0%) to 254 (100%) 0F1 Byte 2 Brake 0 (0%) to Unknown (254?) Typical pressure on brake pedal generates about 30. 120 Bytes 1-4 Odometer 1/64 km: e.g. 1234320 (0x0012D590) represents 19286.25 km or 11983.92 mi 135 Byte 1 Drive Position 0=Park, 1=Neutral, 2=Drive/L, 3=Reverse 1A1 Byte 7 Accelerator 0 (0%) to 254 (100%) 1C3 Byte 7 Accelerator 0 (0%) to 254 (100%) - This one includes automatic output from the cruise control 1EF Bytes 3-4 Gas Engine RPM RPM 1F5 Byte 4 Shift Position PRNDL 1=Park, 2=Reverse, N=Neutral, D=Drive, L=Low 206 Bytes 1-2 Battery SOC .250kWh Units possibly .244kWh 32A Bytes 1-4 GPS Latitude Milliarcseconds 32A Bytes 5-8 GPS Longitude Milliarcseconds 3E9 Bytes 1-2 Speed 1/64 KPH (90KPH would be 5760 (0x1580)) 5EC Byte 3 Charging Current units 0.2 A (ex. 14.2 A = 0x47) 5EC Byte 4 Charging Voltage units 2 V (ex. 222V = 0x6F) 5EC Byte 5 Outside Air Temperature in °C unit 0.5°C offset +40 (exp.: 0x60 = 8.0 °C) 5EC Byte 6 Outside Air Temperature filtered in °C unit 0.5°C offset +40

Known PIDs (over ODB-II/UDS)
request over 7E4, answer in 5EC: Onboard charger current: 0x4369 Onboard charger voltage: 0x4368 outside temperature (filtered): 0x801F outside temperature (raw): 0x801E High Voltage battery Temperature: 0x434F Power Electronics Cooling Loop temperature: 0x1C43

Links
Chevy Volt Monitoring

OVMS Code

Volt PIDs