LEMON Manuals: Even more car manuals for everyone
Home >> Lincoln >> 2012 >> MKZ Hybrid >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 30 (Engine Controls - Pinpoint Test DN: Pressure And Temperature Sensors Through Pinpoint Test Dz: Universal Heated Oxygen Sensor (Ho2S) - (Except Diesel & Hybrid)) >> PINPOINT TEST DO: Barometric Pressure (BARO) Sensor >> Test Procedure

Test Procedure

WARNING: This page is about a different variant/trim than selected.
  1. DO1 CHECK FOR DIAGNOSTIC TROUBLE CODES (DTCS) 

    Are DTCs P2227, P2228, or P2229 present? 

    Yes No
    For DTC P2227, GO to  DO2.
    For DTCs P2228 or P2229, GO to  DO3.    		 For all others, GO to DIAGNOSTIC TROUBLE CODE (DTC) CHARTS AND DESCRIPTIONS .
  2. DO2 DTC P2227: CHECK FOR A BARO SENSOR CORRELATION CONCERN 
    • Ignition ON, engine OFF.
    • Access the PCM and monitor the BARO (PRESS), MAP (PRESS) and TIP_PRS_BOOST (PRESS) PIDs.

    Is the BARO pressure reading within 6.87 kPa (1 psi) of the MAP reading and 7.25 kPa (1.05 psi) of the TIP_PRS_BOOST reading? 

    Yes No
    The system is operating correctly at this time.
    Clear the PCM DTCs. REPEAT the self-test.    		 GO to  DO3.
  3. DO3 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.
    • Verify the concern is still present.

    Is the concern still present? 

    Yes No
    INSTALL a new PCM. REFER to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) , Programming the VID Block for a Replacement PCM. The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
scientia non olet · About LEMON Manuals