2007 Saturn Ion Owner's Manual - Page 226

Enhanced Traction System (ETS) Your vehicle may have an Enhanced Traction System (ETS) that limits wheel spin. This is especially useful in slippery road conditions. The system operates only if it senses that one or both of the front wheels are spinning or beginning to lose traction. When this happens, the system reduces engine power and may also upshift the transaxle to limit wheel spin. The LOW TRAC message will be displayed when your ETS is engaged and limiting wheel spin. See Low Traction Message on page 182. You may feel or hear the system working, but this is normal. If your vehicle is in cruise control when the ETS begins to limit wheel spin, the cruise control will automatically disengage. When road conditions allow you to safely use it again, you may re-engage the cruise control. See Cruise Control on page 147. The ETS operates in all transaxle shift lever positions. But the system can upshift the transaxle only as high as the shift lever position you have chosen, so you should use the lower gears only when necessary. 226 The ETS automatically comes on whenever you start your vehicle. The light on the traction control button will also come on to let you know the system is on. To limit wheel spin, especially in slippery road conditions, you should always leave the system on. But you can turn the traction control system off if you ever need to. You should turn the system off if your vehicle ever gets stuck in sand, mud or snow and rocking the vehicle is required. See Rocking Your Vehicle to Get It Out on page 250 and If Your Vehicle is Stuck in Sand, Mud, Ice, or Snow on page 249. To turn the system on or off, press the enhanced traction system button located on the instrument panel.