LEMON Manuals: Even more car manuals for everyone
Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 747 (Engine Controls - Pinpoint Tests - 6.0L Diesel (99P E-Series & 99P F450/550)) >> Pinpoint Test G: Intake Air Temperature 2 (IAT2) Sensor >> Test Procedure

Test Procedure

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2004 Ford RV Cutaway, 2004 Ford Pickup, 2004 Ford F550 Super Duty, 2004 Ford F450 Super Duty, and 2004 Ford Excursion. However, it is still accessible from the selected car via links, so may be relevant.
  1. G1 PRELIMINARY DIAGNOSIS FOR DTCs P0096, P0097, P0098 
    • Perform the visual inspection.
    • Connect the scan tool.
    • Retrieve and record any continuous and on-demand DTCs.
    • Clear all DTCs.
    • Perform the On-Demand Self Test.

    ARE DTCS P0096, P0097 OR P0098 PRESENT? 

    Yes No
    For P0096, Go to  G2.
    For P0097, Go to  G6.
    For P0098, Go to  G8.    		 Unable to duplicate condition. CHECK for loose connection, damaged or corroded terminals or pins. WIGGLE harness attempting to recreate the fault. REPAIR as necessary. REFER to SYMPTOM CHARTS - 6.0L DIESEL if a driveability concern exists.
  2. G2 DIAGNOSTIC TROUBLE CODE P0096 
    NOTE: Refer to the PCM and component connector, Figure and Figure, at the beginning of this pinpoint test.
    • Possible causes:
      • IAT2 sensor circuitry
      • IAT2 sensor
      • PCM
    • Inspect IAT 2 sensor circuitry at sensor and PCM.

    ARE ALL CONNECTORS AND TERMINALS OK? 

    Yes No
    Go to  G3. REPAIR as necessary. RESTORE the vehicle. CLEAR DTCs and RETEST the system.
  3. G3 CHECK IAT2 SENSOR FAULT CODES 
    • Perform On-Demand Self Test.

    ARE OTHER DTCS PRESENT? 

    Yes No
    REPAIR other faults before proceeding. RESTORE the vehicle. CLEAR DTCs and RETEST the system. Only P0096 present, Go to  G4.
  4. G4 CHECK IAT2 SENSOR OPERATION 
    • Clear continuous DTCs.
    • Key on.
    • Using scan tool, monitor IAT2 and engine oil temperature PIDS.
    • Record IAT2 sensor temperature reading.
    • Drive vehicle while monitoring IAT2 sensor reading.
    • Operate vehicle until it reaches normal operating temperature, EOT above 176°F.
    • Idle engine for ten minutes.

    DID IAT2 READINGS CHANGE FROM VALUE RECORDED AT ANY TIME? 

    Yes No
    Unable to duplicate the condition. CHECK for loose connections, damaged or corroded terminals. REPAIR as necessary. REFER to SYMPTOM CHARTS - 6.0L DIESEL if driveability concern exists. INSTALL a new IAT2 sensor. RESTORE the vehicle. CLEAR DTCs and RETEST the system.
  5. G6 DIAGNOSTIC TROUBLE CODE P0097 
    NOTE: Refer to the PCM and component connector, Figure and Figure, at the beginning of this pinpoint test.
    • Possible causes:
      • circuit shorted to ground
      • IAT2 sensor
      • PCM
    • Check for opposite failure.
    • Key off.
    • Disconnect the IAT2 sensor.
    • Perform the On-Demand Self Test.

    IS DTC P0098 PRESENT? 

    Yes No
    INSTALL a new IAT2 sensor. RESTORE the vehicle. CLEAR DTCs and RETEST the system. Go to  G7.
  6. G7 CHECK SIGNAL CIRCUIT FOR A SHORT TO GROUND 
    • Disconnect the PCM engine harness connector.
    • Measure the resistance between the IAT2 sensor electrical connector pin 2 and ground.

    IS THE RESISTANCE GREATER THAN 10,000 OHMS? 

    Yes No
    INSTALL a new PCM. RESTORE the vehicle. CLEAR DTCs and RETEST the system. REPAIR short to ground in the IAT2 sensor signal circuit. RESTORE the vehicle. CLEAR DTCs and RETEST the system.
  7. G8 DIAGNOSTIC TROUBLE CODE P0098 
    NOTE: Refer to the PCM and component connector, Figure and Figure, at the beginning of this pinpoint test.
    • Possible causes:
      • circuit shorted to voltage
      • open in signal return circuit
      • IAT2 sensor
      • PCM
    • Key off.
    • Disconnect the IAT2 sensor.
    • Measure the resistance between IAT2 sensor connector pin 1, and ground.

    IS THE RESISTANCE LESS THAN 5 OHMS? 

    Yes No
    Go to  G9 . REPAIR open in the IAT2 sensor return circuit. RESTORE the vehicle. CLEAR DTCs and RETEST the system.
  8. G9 CHECK SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE 
    • Key off.
    • Disconnect the PCM engine harness electrical connector.
    • Key on.
    • Measure the voltage between IAT2 sensor connector pin 2 and ground.

    IS THE VOLTAGE GREATER THAN 0.2 VOLTS? 

    Yes No
    REPAIR short to voltage in the IAT2 sensor signal circuit. RESTORE the vehicle. CLEAR DTCs and RETEST the system. Go to  G10.
  9. G10 INDUCE OPPOSITE FAILURE 
    • Install a jumper between pins 1 and 2, of the IAT2 sensor electrical connector.
    • Key on.
    • Perform the On-Demand Self Test.

    IS DTC P0097 PRESENT? 

    Yes No
    INSTALL a new IAT2 sensor. RESTORE the vehicle. CLEAR DTCs and RETEST the system. Go to  G11.
  10. G11 CHECK SIGNAL CIRCUIT FOR AN OPEN 
    • Key off.
    • Measure the resistance between the PCM engine harness pin 45, and IAT2 sensor connector pin 2.

    IS THE RESISTANCE LESS THAN 5 OHMS? 

    Yes No
    INSTALL a new PCM. RESTORE the vehicle. CLEAR DTCs and RETEST the system. REPAIR open in the IAT2 signal circuit. RESTORE the vehicle. CLEAR DTCs and RETEST the system.
scientia non olet · About LEMON Manuals