For 1990-2009 cars only

Makes 🢒 HUMMER 🢒 2003 🢒 H2 🢒 Body and Accessories 🢒 Retained Accessory Power 🢒 Diagnostic Starting Point - Retained Accessory Power

Diagnostic Starting Point - Retained Accessory Power for HUMMER H2 2003

Begin the system diagnosis with the Diagnostic System Check - Retained Accessory Power . The diagnostic system check will provide the following information:

•	The identification of the control modules which command the system

•	The ability of the control modules to communicate through the serial data circuit

•	The identification of any stored diagnostic trouble codes DTCs and their status

The use of the Diagnostic System Check will identify the correct procedure for diagnosing the system and where the procedure is located.