LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2021 >> Blazer RS, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (Engine Controls And Fuel - 2.0L (LSY) - Diagnostic Information And Procedures (2 Of 2)) >> Diagnostic Information and Procedures >> DTC P0650, P263A, or P263B - Malfunction Indicator Lamp (MIL) Malfunction >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.
  1. Ignition - On/Vehicle - In Service Mode
  2. 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 
  3. 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 
  4. 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 
  5. 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 
  6. All OK.