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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 20 (Engine Controls And Fuel - 4.3L (LV1) - Diagnostic Information And Procedures (1 Of 2)) >> Diagnostic Information and Procedures >> DTC P018B-P018D (Chassis Control Module) >> Circuit/System Verification

Circuit/System Verification

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  1. Ignition - On / Vehicle - In Service Mode
  2. Verify the scan tool parameter : Fuel Pressure = 345 to 650 kPa (50 to 94 PSI)
    • If not between 345 and 650 kPa (50 and 94 PSI) 

      Refer to : Circuit/System Testing

    • Go to next step : If between 345 and 650 kPa (50 and 94 PSI) 
  3. Increase/Decrease - Engine Speed/Throttle

    Verify the scan tool parameter : Fuel Pressure = 345 to 650 kPa (50 to 94 PSI) & Varies

    • If the value does not change 

      Refer to : Circuit/System Testing

    • Go to next step : If the value changes 
  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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