Circuit/System Testing
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2018 GMC Yukon XL, 2018 GMC Yukon, 2018 Chevrolet Tahoe, 2018 Chevrolet Suburban, and 2018 Cadillac Escalade ESV. However, it is still accessible from the selected car via links, so may be relevant.
- Verify no I/M DTCs are present.
- If an I/M DTC is set that would prevent the I/M System Status tests from completing, diagnose that DTC before continuing.
- Go to next step: If no I/M DTCs are set
- Review applicable service bulletins for software updates that would prevent the I/M System Status tests from completing.
- If a control module re-program or other repair is required,
Perform the Inspection/Maintenance Complete System Set Procedure after repair.
- Go to next step: If no repair is required
- If a control module re-program or other repair is required,
- Observe the Inspection/Maintenance System Status or Data indicators.
- If any Inspection/Maintenance System Status or Data indicators report NO
Perform the Inspection/Maintenance Complete System Set Procedure .
- Go to next step: If no Inspection/Maintenance System Status or Data indicators report NO
- If any Inspection/Maintenance System Status or Data indicators report NO
- All OK.
NOTE:
Many DTC related repairs will instruct the technician to clear the DTC information. Clearing the DTC will reset the Inspection/Maintenance System Status or Data indicators to NO. Performing the I/M Complete System Set Procedure will set each of the I/M System Status indicators to YES.