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Home >> Cadillac >> 2007 >> XLR Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 4.6L (LH2) - DTC P0010 To DTC P0336 >> DTC P0106 >> Circuit/System Testing
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Circuit/System Testing

IMPORTANT: You must perform the Circuit/System Verification before proceeding with the Circuit/System Testing.
  1. Ignition OFF, allow sufficient time for the ECM to power down. Disconnect the harness connector at the MAP sensor.
  2. Ignition OFF, test for less than 5 ohms of resistance between the low reference circuit terminal A and ground.
    • If greater than the specified range, test the low reference circuit for an open or high resistance. If the circuit tests normal, replace the ECM.
  3. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal C and ground.
    • If less than the specified range, test the 5-volt reference circuit for a short to ground, open or high resistance. If the circuit tests normal, replace the ECM.
    • If greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the ECM.
  4. Verify the scan tool MAP Sensor parameter is less than 0.2 volt.
    • If greater than the specified range, test the signal circuit terminal B for a short to voltage. If the circuit tests normal, replace the ECM.
  5. Install a 3-amp fused jumper wire between the signal circuit terminal B and the 5-volt reference terminal C. Verify the scan tool MAP Sensor parameter is greater than 4.9 volts.
    • If less than the specified range, test the signal circuit for a short to ground, open, high resistance. If the circuit tests normal, replace the ECM.
  6. If all circuits test normal, test or replace the MAP sensor.
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