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Home >> Pontiac >> 2010 >> Vibe Base, 1.8 8, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel System - 1.8L (Lay) - DTC P0010 To DTC P0420/P043F >> DTC P0100-P0103 >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the MAF sensor.
  2. Ignition OFF, test for less than 10 Ω between the MAF sensor low reference circuit terminal 4 and ground G104.
    • If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the PCM.
  3. Ignition ON, test for B+ between the ignition voltage circuit terminal 3 and ground.
    • If less than the specified range, test the ignition voltage circuit for an open/high resistance, or a short to ground.
  4. Verify the scan tool MAF sensor parameter is less than 0.5 g/s.
    • If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the PCM.
  5. Connect a test lamp between the ignition voltage circuit terminal 3 and the signal circuit terminal 5. Verify the MAF sensor parameter is greater than 200 g/s.
    • 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 PCM.
  6. If all circuits test normal, test or replace the MAF sensor.
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