hummer Workshop Repair Guides

Hummer Workshop Service and Repair Manuals

Sensors and Switches - Computers and Control Systems > < Main Relay (Computer/Fuel System)|Locations|Page 3624
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1. Install any components that have been removed or replaced during diagnosis.
2. Perform any adjustment, programming, or setup procedures that are required when a component or module is removed or replaced.
3. Clear the DTCs.
4. Turn OFF the ignition for 60 seconds.
5. Ignition ON, command the powertrain relay ON and OFF with a scan tool, while observing the powertrain relay circuit status parameters, The

circuit status parameters should change from OK to Not Run or Not Run to OK.

‹› If another DTC is present, refer to Diagnostic Trouble Code (DTC) List - Vehicle  (See: Testing and Inspection/Diagnostic Trouble Code

Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle) and perform the appropriate diagnostic procedure.

Sensors and Switches - Computers and Control Systems > < Main Relay (Computer/Fuel System)|Locations|Page 3624