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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different car >> Section 92 (Engine Controls And Fuel - 2.8L (LWN) Diesel - Diagnostic Information And Procedures (1 Of 3)) >> Diagnostic Information and Procedures >> DTC P0101-P0103 >> Component Testing

Component Testing

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.
    NOTE:

    Circuit/System Testing must be performed before proceeding with Component Testing.

  1. Ignition/Vehicle - Off
  2. Disconnect the electrical connector: B75C Multifunction Intake Air Sensor
  3. Install the special tool: EL-38522 Variable Signal Generator
    • Red lead @ Signal circuit terminal 6
    • Black lead @ Ground
    • Set the voltage to 5 V
    • Set the frequency to 5 000 Hz
    • Set the duty cycle to 50%
  4. Engine at Idle
  5. Verify the scan tool parameter: MAF Sensor = 4 950 to 5 050 Hz
    • If not between 4 950 and 5 050 Hz 

      Replace the component: K20 Engine Control Module

    1. Ignition/Vehicle - Off
    2. Disconnect the appropriate electrical connector: K20 Engine Control Module
    3. Test for less than 2 ohms between the test points: Signal circuit terminal 6 @ Component harness & The other end of the circuit @ Control module harness
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Replace the component: K20 Engine Control Module
    • Go to next step: If between 4 950 and 5 050 Hz 
  6. Replace the component: B75C Multifunction Intake Air Sensor
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