Cadillac 2nd gen CTS

Vehicle Type: C2CTS

This vehicle type supports the 2008-2014 Cadillac CTS.

Support Overview

Function	Support Status
Hardware	OVMS v3
Vehicle Cable	OBD-II cable
GSM Antenna	Works with any OVMS v3 supported antenna
GPS Antenna	Works with any OVMS v3 supported antenna
SOC Display	Yes
Range Display	No
GPS Location	Yes (from GPS module/antenna)
Speed Display	No
Temperature Display	No
BMS v+t Display	No
TPMS Display	No
Charge Status Display	Yes (Fuel level)
Charge Interruption Alerts	No
Charge Control	No
Cabin Pre-heat/cool Control	No
Lock/Unlock Vehicle	No
Valet Mode Control	No
Others	12V battery

The under dash OBD-II connector is located to the left of the steering wheel.

One of the best places to hardwire connections is at the OnStar module (aka the vehicle communication interface module or VCIM). The module is located behind the glove box and connector J1 has everything needed:

J1	DB9-F	Signal
14	2	can1 L (CAN bus #5 L)
4	3	Chassis / Power GND
6	7	can1 H (CAN bus #5 H)
16	9	+12V Vehicle Power

The roof mounted shark fin contains three antennas: OnStar GPS, OnStar cellular, and XM satellite radio. GPS and cellular and combined on a single coax which makes it difficult to repurpose the OnStar antennas for OVMS. One setup that works is to use the shark fin antenna for OVMS GPS and place a separate cellular antenna on the rear window package tray.

Standard Metrics

Metric name	Notes
ms_v_b_soc	Fuel level (%)
ms_v_bat_12v_voltage	Resolution of 0.1 V
ms_v_e_on
ms_v_vin	17 characters