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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1059 (Engine Controls - Pinpoint Tests - 6.0L Diesel (99P F450/550)) >> Pinpoint Test AO: Injector Control Pressure Too High >> Test Procedure

Test Procedure

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  1. AO1 PRELIMINARY DIAGNOSIS FOR DTC P2284 OR P2288 
    • Carry out the KOEO, KOER, and continuous on-demand self tests.
    • Retrieve and record all DTCs.
    • Record the freeze frame data.

    Is DTC P2284 or P2288 present? 

    Yes No
    For KOEO and continuous DTC P2284 or P2288, GO to  AO2.
    For KOER DTC P2284 or P2288, GO to  AO9.
    For DTC P2290, GO to  AO9    		 UNABLE to duplicate the condition. CHECK for a loose connection, and damaged or corroded terminals. WIGGLE the harness attempting to recreate the fault. REPAIR as necessary. REFER to SYMPTOM CHARTS - 6.0L DIESEL if a driveability concern exists.
  2. AO2 DIAGNOSTIC TROUBLE CODE (DTC) P2284 OR P2288 
    • Possible causes:
      • incorrect oil or viscosity
      • poor oil quality
      • gelled fuel/no fuel
      • low fuel pressure
      • biased ICP sensor
      • IPR valve
      • high-pressure oil system leak
      • high-pressure oil pump
      • PCM
    • Verify the correct oil quality/viscosity and correct fuel grade are being used for the temperature conditions.

    Is the oil and fuel quality OK? 

    Yes No
    GO to  AO3. REPAIR the fuel or oil condition. CLEAR the DTCs. REPEAT the self-test.
  3. AO3 CHECK THE FUEL PRESSURE 
    • Measure the fuel pressure at the regulator block.
    • Measure the fuel pressure at idle and on the road at WOT at full load. The fuel pressure at idle should be 310 kPa (45 psi) minimum and 207-482 kPa (30-70 psi) at WOT full load.

    Is the fuel pressure within specification? 

    Yes No
    GO to  AO4. REPAIR the fuel system concern. CLEAR the DTCs. REPEAT the self-test.
  4. AO4 CARRY OUT THE KOER ON-DEMAND SELF-TEST 
    • Carry out the KOER on-demand self-test.

    Is DTC P2284 or P2288 present? 

    Yes No
    GO to  AO6. GO to  AO12.
  5. AO6 CHECK THE ICP SENSOR 
    • Key ON, engine OFF.
    • Access the ICP PID.

    Is the ICP PID voltage between 0.15 and 0.35 volts? 

    Yes No
    GO to  AO7. INSTALL a new ICP sensor. CLEAR the DTCs. REPEAT the self-test.
  6. AO7 CHECK FOR OIL AERATION 
    • Accelerate the engine and hold at 3,300 RPM for 3 minutes.
    • Access the ICP PID.

    Is the injection control pressure increase greater than 12.4 MPa (1,800 psi)? 

    Yes No
    CHANGE the engine oil. CLEAR the DTCs. REPEAT the self-test. GO to  AO8.
  7. AO8 CHECK THE IPR DUTY CYCLE UNDER VEHICLE LOAD 
    • Access the IPR PID.
    • Operate the vehicle at WOT and a full load condition.

    Does the IPR duty cycle increase to 65%? 

    Yes No
    INSTALL a new IPR valve. CLEAR the DTCs. REPEAT the self-test. UNABLE to duplicate the condition. CHECK for a loose connection, and damaged or corroded terminals. WIGGLE the harness attempting to recreate the fault. REPAIR as necessary. REFER to SYMPTOM CHARTS - 6.0L DIESEL if a driveability concern exists.
  8. AO9 KOER ON-DEMAND DIAGNOSTIC TROUBLE CODE (DTC) P2284, P2288, OR P2290 
    • DTC P2288 indicates that injection control pressure was above the commanded desired pressure during self-test mode.
    • DTC P2284 or P2290 indicate a difference in the commanded and actual injection control pressure.
    • Possible causes:
      • incorrect oil or viscosity
      • poor oil quality
      • gelled fuel/no fuel
      • low fuel pressure
      • biased ICP sensor
      • IPR valve
      • high-pressure oil system leak
      • high-pressure oil pump
      • PCM
    • Verify correct oil quality/viscosity and correct fuel grade are being used for the temperature conditions.

    Is the oil and fuel quality OK? 

    Yes No
    GO to  AO10. REPAIR the fuel or oil condition. CLEAR the DTCs. REPEAT the self-test.
  9. AO10 CHECK THE FUEL PRESSURE 
    • Measure the fuel pressure at the regulator block.
    • Measure the fuel pressure at idle and on the road at WOT at full load. The fuel pressure at idle should be 310 kPa (45 psi) minimum, and 310-551 kPa (45-80 psi) at WOT full load.

    Is the fuel pressure within the specifications? 

    Yes No
    GO to  AO12 REPAIR the fuel system concern. CLEAR the DTCs. REPEAT the self-test.
  10. AO12 CHECK THE ICP SENSOR 
    • Key ON, engine OFF.
    • Access the ICP PID.

    Is the ICP PID voltage between 0.15 and 0.35 volts? 

    Yes No
    GO to  AO13. INSTALL a new ICP sensor. CLEAR the DTCs. REPEAT the self-test.
  11. AO13 CHECK FOR OIL AERATION 
    • Accelerate the engine to wide-open throttle and hold for 3 minutes.

    Is the injection control pressure increase greater than 12.4 MPa (1,800 psi)? 

    Yes No
    CHANGE the engine oil. CLEAR the DTCs. REPEAT the self-test. GO to  AO14.
  12. AO14 CHECK THE ICP SENSOR VOLTAGE WHILE CARRYING OUT THE SELF-TEST 
    NOTE: During the KOER on-demand self-test, the ICP will be commanded high 17 MPa (2465 psi), then low 5 MPa (725 psi), and then the EP will be commanded high and low.
    • Install the ICP/EBC adapter cable D94T-50-A, or equivalent, between the ICP sensor and the engine harness.
    • Measure the voltage between the ICP sensor signal circuit, harness side and ground.
    • Carry out the KOER on-demand self-test.

    Does the voltage reading increase above 3 volts and then decrease to approximately 1 volt during the ICP portion of the KOER test? 

    Yes No
    If DTC P2284 or P2288 was retrieved, INSTALL a new PCM. CLEAR the DTCs. REPEAT the self-test. GO to DIAGNOSTIC ROUTINES HARD START/NO START DIAGNOSTIC PROCEDURES . CARRY OUT the Monitor the ICP While Cranking Test.
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