Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Cadillac >> 2009 >> Escalade EXT >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel - 4.8L, 5.3L, 6.0L Or 6.2L - DTC P0010 To DTC P0230 >> DTC P0192 or P0193 >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the fuel line pressure sensor.
  2. Ignition OFF, test for less than 1 ohm between the low reference circuit terminal 2 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 fuel pump flow control module.
  3. Ignition ON, test for 4.8-5.2 volts between the fuel line pressure sensor 5-volt reference circuit terminal 3 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 fuel pump flow control module.
    • If greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the fuel pump flow control module.
  4. Verify the scan tool 5 volt reference is less than 1 volt.
    • If greater than the specified range, test the signal circuit terminal 1 for a short to voltage. If the circuit tests normal, replace the fuel pump flow control module.
  5. Install a 3A fused jumper wire between the signal circuit terminal 1 and the 5-volt reference circuit terminal 3. Verify the scan tool 5 volt reference is greater than 4.8 volts.
    • 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 fuel pump flow control module.
  6. If all circuits test normal, replace the fuel pressure sensor.
scientia non olet · About Mike's Workshop Manuals