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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 P0351-P0354, P2300, P2301, P2303, P2304, P2306, P2307, P2309, or P2310 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.
  1. Engine - Running
  2. Verify the scan tool parameter:
    • Ignition Coil 1 - 4 Control Circuit High Voltage Test Status = OK or Not Run
    • Ignition Coil 1 - 4 Control Circuit Low Voltage Test Status = OK or Not Run
    • Ignition Coil 1 - 4 Control Circuit Open Test Status = OK or Not Run
    • If not the specified state 

      Refer to: Circuit/System Testing

    • Go to next step: If the specified state 
  3. Verify the scan tool parameter:
    • Ignition Coil 1 - 4 Control Circuit High Voltage Test Status = OK or Not Run
    • Ignition Coil 1 - 4 Control Circuit Low Voltage Test Status = OK or Not Run
    • Ignition Coil 1 - 4 Control Circuit Open Test Status = OK or Not Run
    • Perform the action while monitoring the parameter:
    • Wiggle the harness and connector: T8 Ignition Coil
    • Wiggle the harness and connector: K20 Engine Control Module
    • If not the specified state 

      Repair as necessary - Wiring/Terminal(s)/Electrical Connector(s)

    • Go to next step: If the specified state 
  4. 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 the DTC does not set.

    • If the DTC sets 

      Refer to: Circuit/System Testing

    • Go to next step: If the DTC is not set 
  5. All OK.
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