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Home >> Chevrolet >> 2006 >> Impala LS, 3.5 K >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - 3.5L - DTC P0010 To DTC P0420 >> DTC P0106, P0107, or P0108 >> Circuit/System Testing

Circuit/System Testing

Always perform the Diagnostic System Check - Vehicle .

  1. Start the engine.
  2. Monitor the DTC information with the scan tool.
  3. If DTC P0641 or P0651 is also set, correct DTC P0641 or P0651 first.
  4. Turn the ignition ON, with the engine OFF.
  5. Disconnect the MAP sensor.
  6. Measure for 4.8-5.2 volts from the 5-volt reference circuit of the MAP sensor to a good ground with a DMM.
    • If more than the specified value, test the circuit for a short to voltage or a faulty control module.
    • If less than the specified value, test the circuit for high resistance, an open, or an intermittent and poor connection at the control module, or a faulty control module.
  7. Disconnect the MAP sensor
  8. Use a scan tool to observe the MAP sensor for less than 12 kPa.
    • If the MAP sensor is more than 12 kPa then test the MAP sensor signal circuit for a short to voltage or a faulty control module.
  9. Use a 3-amp fused jumper wire and connect it between the MAP sensor 5-volt reference circuit and the MAP sensor signal circuit.
  10. Use a scan tool to observe the MAP sensor for more than 103 kPa.
    • If the MAP sensor is less than 103 kPa, test the MAP sensor signal circuit for high resistance or a faulty control module.
  11. With the 3-amp fused jumper wire still connected between the 5-volt reference circuit of the MAP sensor and the signal circuit of the MAP sensor, observe the MAP sensor parameter with the scan tool for 4.9 volts.
    • If more than 4.9 volts, replace the MAP sensor.
    • If less than 4.9 volts, test the MAP sensor signal circuit between the control module and the MAP sensor for a short to ground, an open, or high resistance. Test for an intermittent and for a poor connection at the control module. If tests OK, replace the control module.
  12. Turn OFF the ignition and allow the control module to power down.
  13. With a DMM, measure for less than 5 ohms of resistance between the low reference circuit of the MAP sensor and a good ground.
    • If the resistance is more than 5 ohms, test the circuit for a high resistance or a faulty control module.
  14. If the MAP sensor circuits test normal, replace the MAP sensor.
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