LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2017 >> Malibu LS >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 28 (Engine Controls And Fuel - 1.8L (LKN) - DTC P0010 To P0459) >> Diagnostic Information and Procedures >> DTC P0101: Mass Air Flow (MAF) Sensor Performance >> Component Testing >> Testing with EL-38522-A

Testing with EL-38522-A

WARNING: This page is about a different variant/trim than selected.
  1. Ignition OFF, connect the leads of the EL-38522-A  Variable Signal Generator as listed below:
    NOTE: In-correct diagnosis will result if Circuit/System Testing is not completed before performing the following test.
    • Red lead to the signal circuit terminal 6 at the harness connector
    • Black leads to ground
    • Battery voltage supply lead to B+
  2. Set the EL-38522-A  Variable Signal Generator to the specifications listed below:
    • Signal switch to 5 V
    • Frequency switch to 5 kHz
    • Duty Cycle switch to 50% (Normal)
  3. Engine idling.
  4. Verify the scan tool MAF Sensor parameter is between 4, 950 - 5, 050 Hz.
    • If not between 4, 950 - 5, 050 Hz. 
    1. Ignition Off, remove the EL-38522-A  and disconnect the harness connector at the K20 Engine Control Module.
    2. Test for less than 2 Ω in the signal circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the K20 Engine Control Module.
    • If between 4, 950 - 5, 050 Hz. 
  5. Replace the B75C Multifunction Intake Air sensor.
scientia non olet · About LEMON Manuals