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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 P0101 or P1101 >> Circuit/System Testing
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Circuit/System Testing

  1. If P0106 or P0121 is set, diagnose first.
  2. Turn ON the ignition, with the engine OFF.
  3. Measure the battery voltage.
  4. Disconnect the MAF sensor.
  5. Connect a test lamp between the MAF sensor ignition 1 voltage circuit and a good ground.
  6. With the test lamp still connected, measure for battery voltage between the ignition 1 voltage circuit and a good ground.
    • If the voltage is not within 0.75 volts of battery voltage, repair the high resistance in the circuit.
  7. Measure the voltage between the MAF sensor signal circuit and a good ground for 4.9-5.2 volts.
    • If the voltage is less than 4.9 volts, test the circuit for a high resistance.
    • If the voltage is within 4.9-5.2 volts, test the circuit for a short to the IAT signal circuit or to any other 5-volt reference circuit.
  8. Turn OFF the ignition and all electrical accessories. Allow sufficient time for the control module to power down before taking a resistance measurement.
  9. Measure the resistance between the ground circuit of the MAF sensor and a good ground for less than 5 ohms of resistance. You should measure less than 5 ohms of resistance.
    • If the resistance is more than 5 ohms, repair the high resistance in the ground circuit.
    10. IMPORTANT: To set up the J 38522  , place the duty cycle to normal, the frequency to 5K, and the signal switch to 5 volts.
  10. Turn OFF the ignition and connect the read lead of the J 38522  to the signal circuit of the MAF sensor harness connector and the black lead to a good ground.
  11. Start the engine and observe the MAF Sensor parameter for a range of 4,950-5,025 Hertz.
    • If the MAF sensor is not within the specified range, test for intermittent or poor connections at the control module. If test normal, replace the control module.
    • If the MAF sensor is within the specified range, test for intermittent or poor connections at the control module. If test normal, replace the MAF sensor.
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