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Home >> Pontiac >> 2009 >> Vibe Base, 2.4 0, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 9 (Engine Control System & Fuel System - 1.8L (Lay) - DTC P0010 To DTC P0420) >> DTC P0100, P0102, or P0103 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.
  1. Ignition OFF, disconnect the harness connector at the MAF sensor.
  2. Ignition OFF, test for less than 10 ohms between the MAF sensor signal low circuit terminal 4 and ground G104.
    • If greater than the specified range, test the signal low circuit for an open/high resistance. If the circuit tests normal, replace the PCM.
  3. Ignition ON, test for battery voltage on the ignition 1 voltage circuit terminal 3.
    • If less than B+, repair the open/high resistance in the ignition 1 voltage circuit.
  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 1 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 high 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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