Circuit/System Testing
WARNING: This page is about a different car, the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Cadillac Escalade EXT, 2007 Cadillac Escalade ESV, and 2007 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.
Engine ON, the scan tool Ignition voltage parameter should display between 12.5-14.5 volts.
- If the voltage is not within the specified value, test the ignition voltage circuit for an open circuit or short to ground.