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Home >> Mercury >> 2008 >> Milan Base, 3.0 1, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1881 (Engine Controls - Pinpoint Test DY: Engine Oil Temperature (EOT) Sensor Through Pinpoint Test He: Exhaust Gas RECIRCULATION (EGR) Systems - (Except Diesel & Hybrid)) >> Pinpoint Test EA: Pressure and Temperature Sensor Correlation >> Test Procedure

Test Procedure

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  1. EA1 CHECK FOR DIAGNOSTIC TROUBLE CODES (DTCS) 
    NOTE: Diagnose and repair all circuit DTCs before diagnosing range or performance DTCs.

    Are DTCs P007B, P0096, P0106, P0111, P0236, or P00CE present? 

    Yes No
    For KOEO DTCs P007B, P0096, P0111 or P00CE, GO to  EA2.
    For KOER DTCs P007B, P0096 or P00CE, GO to  EA4.
    For KOEO DTCs P0106 or P0236, GO to  EA5.
    For KOER DTCs P0106 or P0236, GO to  EA8.    		 For all other DTCs, GO to DIAGNOSTIC TROUBLE CODE (DTC) CHARTS AND DESCRIPTIONS .
  2. EA2 DTCS P007B, P0096, P0111 OR P00CE: CHECK FOR TEMPERATURE SENSOR CIRCUIT DTCS 

    Are DTCs P007B, P0096, P0111 or P00CE present along with other DTCs? 

    Yes No
    DISREGARD the current diagnostic trouble code (DTC) at this time. DIAGNOSE the next DTC. GO to DIAGNOSTIC TROUBLE CODE (DTC) CHARTS AND DESCRIPTIONS . GO to  EA3.
  3. EA3 CHECK FOR CAC_T, IAT, AND IAT2 VALUE CORRELATIONS 
    • Cold soak the vehicle at ambient temperature for at least 6 hours.
    • Ignition ON, engine OFF.
    • Access the PCM and monitor the CAC_T, IAT and IAT2 PIDs.

    Are the IAT, CACT and IAT2 temperature readings within 16.67°C (30°F) of each other? 

    Yes No
    Unable to duplicate or identify the concern at this time. Cold soak the vehicle at ambient temperature for at least 6 hours. REPEAT the self-test. GO to  EA4.
    If no concern is present, GO to  EA9.    		 For IAT sensor, GO to PINPOINT TEST DA .
    For TCBP/CACT or MAP/IAT2, GO to PINPOINT TEST DN .
  4. EA4 CHECK THE KOER CAC_T, IAT, AND IAT2 VALUES 
    • Allow the engine to idle at the normal operating temperature.
    • Access the PCM and monitor the CAC_T, IAT and IAT2 PIDs.
    • Drive the vehicle at a steady speed of 88 km/h (55 mph) for a minimum of 6 minutes.

    Does the IAT temperature exceed 65.5°C (150°F), or does the CACT temperature exceed 104.4°C (220°F), or does the IAT2 temperature exceed 115.6°C (240°F)? 

    Yes No
    CHECK the charge air cooler (CAC) for debris and obstructed air flow. REPAIR as necessary.
    If OK, INSTALL a new sensor for the sensor that exceeded the temperature limit. REFER to the appropriate Electronic Engine Controls article .    		 GO to  EA9.
  5. EA5 DTCS P0106 OR P0236: CHECK FOR PRESSURE SENSOR CIRCUIT DTCS 

    Are DTCs P0106 or P0236 present along with other DTCs? 

    Yes No
    DISREGARD the current diagnostic trouble code (DTC) at this time. DIAGNOSE the next DTC. GO to DIAGNOSTIC TROUBLE CODE (DTC) CHARTS AND DESCRIPTIONS . GO to  EA6.
  6. EA6 CHECK FOR KOEO BARO, MAP, TIP_PRS_BOOST VALUE CORRELATIONS 
    • Ignition ON, engine OFF.
    • Access the PCM and monitor the BARO, MAP and TIP_PRS_BOOST PIDs.

    Are the BARO, MAP, and TIP_PRS_BOOST pressure readings within 10.35 kpa (1.5 psi) of each other? 

    Yes No
    GO to  EA7. For TCBP/CACT or MAP/IAT2, GO to PINPOINT TEST DN .
    For BARO, GO to PINPOINT TEST DO .
  7. EA7 CHECK FOR PRESSURE SENSOR INLET RESTRICTIONS 
    • Remove the TCBP/CACT or MAP/IAT2 sensors. Refer to the appropriate Electronic Engine Controls article .
    • Carry out a visual inspection.
    • Check the TCBP/CACT or MAP/IAT2 sensor port and inlet for:
      • contamination
      • restrictions
      • carbon build-up or deposits

    Is a concern present? 

    Yes No
    CLEAN or INSTALL a new sensor as necessary. REFER to the appropriate Electronic Engine Controls article .
    Clear the DTCs.
    REPEAT the self-test.    		 GO to  EA9.
  8. EA8 KOER DTCS P0106 OR P0236: CHECK THE BARO, MAP AND TIP_PRS_BOOST VALUE CORRELATIONS 
    • Allow the engine to idle at the normal operating temperature.
    • Access the PCM and monitor the BARO and TIP_PRS_BOOST PIDs.

    Are the BARO and the TIP_PRS_BOOST readings within 6.9 kpa (1 psi) of each other? 

    Yes No
    INSTALL a new TCBP/CACT sensor. REFER to the appropriate Electronic Engine Controls article . GO to  EA9.
  9. EA9 CHECK FOR CORRECT PCM OPERATION 
    • Disconnect all the PCM connectors.
    • Visually inspect for:
      • Pushed out pins
      • Corrosion
    • Connect all the PCM connectors and make sure they seat correctly.
    • Carry out the PCM self-test.

    Is the concern still present? 

    Yes No
    INSTALL a new PCM. REFER to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) . The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
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