LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Cadillac >> 2006 >> STS V >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - 4.4L - DTC P0506 To P2544 >> DTC P1183 or P1184 >> Circuit/System Testing
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the SCIP sensor.
  2. Ignition ON, allow sufficient time for the ECM to power down. Test for less than 2 ohms of resistance between the low reference circuit and ground.
    • If greater than the specified range, test the low reference circuit for an open/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 and ground.
    • If less than the specified range, test the 5-volt reference circuit for a short to ground or an open/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 SC Inlet Pressure Sensor parameter is less than 20 kPa.
    • If the greater than the specified parameter, test the signal circuit for a short to voltage. If the circuit tests normal, replace the ECM.
  5. Install a 3-amp fused jumper wire between the 5-volt reference circuit and the signal circuit. Verify the scan tool parameter is greater than 100 kPa.
    • If less than the specified parameter, 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 the SCIP sensor.
scientia non olet · About LEMON Manuals