LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2011 >> Traverse LS, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 75 (Engine Control System & Fuel System - 2.8L, 3.0L - DTC P0008 To DTC P0118) >> DTC P0101 (LF1) >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2010 Cadillac SRX. However, it is still accessible from the selected car via links, so may be relevant.
  1. Verify the integrity of the entire air induction system by inspecting for the following conditions:
    • Any damaged components
    • Loose or improper installation
    • An air flow restriction
    • Any vacuum leaks
    • Water intrusion
    • In cold climates, inspect for any snow or ice buildup
    • Inspect the B75B MAF/IAT sensor element for contamination.
  2. Ignition OFF, disconnect the harness connector at the B75B MAF/IAT sensor.
  3. Ignition OFF, remove the fuse that supplies B+ to terminal 52 X1 of the ECM.
  4. Ignition OFF and all vehicle systems OFF. It may take up to 2 minutes for all vehicle systems to power down. Test for less than 5 Ω between the ground circuit terminal B and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  5. Install fuse that supplies B+ to terminal 52 X1 of the ECM.
  6. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal C and ground.
    • If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.
  7. Ignition ON, test for 4.8-5.2 V between the signal circuit terminal A and ground.
    • If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K20 ECM.
    • If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the K20 ECM.
  8. Ignition OFF, connect the red lead of the J 38522  to the signal circuit terminal A at the B75B MAF/IAT sensor harness connector. Connect the battery voltage supply to the B+, and the black lead to ground.
  9. Set the J 38522  signal switch to 5 V, the Frequency switch to 5K, and the Duty Cycle switch to Normal.
  10. Ignition ON, observe the scan tool MAF Sensor parameter. The scan tool MAF Sensor parameter should be between 4,950-5,050 Hz.
    • If the MAF Sensor parameter is not within the specified range, replace the K20 ECM.
  11. If all other circuits test normal, test or replace the B75B MAF/IAT sensor.
scientia non olet · About LEMON Manuals