Circuit/System Verification
WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition - On / Vehicle - In Service Mode
- Perform the scan tool control function: Malfunction Indicator Lamp (MIL) - On and Off
Verify the scan tool parameter:
- MIL Control Circuit High Voltage Test Status = Not Run or OK
- MIL Control Circuit Low Voltage Test Status = Not Run or OK
- MIL Control Circuit Open Test Status = Not Run or OK
- If not the specified state
Refer to: Circuit/System Testing
- Go to next step: If the specified state
- Perform the scan tool control function: Malfunction Indicator Lamp (MIL) - On and Off
Verify the component turns On and Off: Malfunction Indicator Lamp (MIL) @ P16 Instrument Cluster
- If the component does not turn On and Off
Refer to: Circuit/System Testing
- Go to next step: If the component turns On and Off
- If the component does not turn On and Off
- Verify a condition does not exist with the component: Malfunction Indicator Lamp (MIL) @ P16 Instrument Cluster - Turns Off
Perform the action while monitoring the component: Wiggle the harness and connector: X1 @ K20 Engine Control Module
- If a condition exists
Repair as necessary - Wiring / Terminal(s) / Electrical Connector(s)
- Go to next step: If no condition exists
- If a condition exists
- Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
Verify that no DTCs are set.
- If the DTC sets
Refer to: Circuit/System Testing
- Go to next step: If the DTC does not set
- If the DTC sets
- All OK.