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Home >> Pontiac >> 2006 >> G6 GTP, 2D Convertible >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - 3.9L - DTC P0010 To DTC P0300 >> DTC P0102 or P0103 >> Circuit/System Testing
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Circuit/System Testing

  1. Inspect for any contamination, water intrusion, or debris on the sensing elements of the MAF sensor.
    • If debris is present, clean the sensor. If the sensor cannot be cleaned, replace the sensor.
  2. Ignition OFF, disconnect the harness connector at the MAF sensor.
  3. Test for less than 5 ohms of resistance between the ground circuit terminal C and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  4. Ignition ON, verify that a test lamp illuminates between the ignition 1 circuit terminal B and ground.
    • If the test lamp does not illuminate, test the ignition 1 circuit for a short to ground or an open/high resistance. If the circuit tests normal and the fuse for the ignition 1 voltage circuit is open, test or replace the MAF sensor.
  5. Ignition ON, test for 4.8-5.2 volts 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 control module.
    • If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the control module.
    6. IMPORTANT: To set up the J 38522 variable speed generator, place the duty cycle to normal, the frequency to 5 K, and the signal switch to 5 volts.
  6. Turn OFF the ignition and connect the red lead of the J 38522 to the signal circuit at the MAF sensor harness connector and the black lead to a good ground.
  7. Start the engine and observe the MAF sensor for 4,950-5,025 Hz with a scan tool.
    • If the MAF sensor is not within the specified range, test for intermittent or poor connection at the control module. If circuit tests normal, replace the control modules.
    • If the MAF sensor is within the specified range, test for intermittent or poor connection at the MAF sensor. If tests normal, replace the MAF sensor.
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