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Test Procedures

WARNING: This page is about a different variant/trim than selected.
  1. DC1 DTCS P0102, P0103, P0104 AND P1101: CHECK FOR SELF-TEST DTCS 

    Are any of the following DTCs present during PCM or TCM self-test: P0102, P0103, P0104 or P1101? 

    Yes No
    For DTC P0102, GO to  DC3.
    For DTC P0103, GO to  DC18.
    For DTC P0104, GO to  DC5.
    For KOEO DTC P1101, GO to  DC7.
    For KOER DTC P1101, GO to  DC2.    		 GO to  DC24.
  2. DC2 DTC P1101: CHECK FOR MAF SENSOR CONTINUOUS MEMORY DTCS 
    • Retrieve any CMDTCs.

    Is a continuous memory MAF DTC present with the KOER DTC P1101? 

    Yes No
    GO to  DC3. Key in OFF position.
    GO to  DC5.
  3. DC3 VERIFY THE CONTINUOUS MEMORY DTC P0102 

    Is a continuous memory DTC P0102 present with the KOER DTC P1101? 

    Yes No
    GO to  DC5. GO to  DC4.
  4. DC4 VERIFY THE CONTINUOUS MEMORY DTC P0103 

    Is a continuous memory DTC P0103 present with the KOER DTC P1101? 

    Yes No
    GO to  DC18. All other continuous memory DTCs:
    DISREGARD the current diagnostic trouble code (DTC) at this time. ADDRESS the next DTC. GO to DIAGNOSTIC TROUBLE CODE (DTC) CHARTS AND DESCRIPTIONS .
  5. DC5 KOER AND CONTINUOUS MEMORY DTCS P0102, P0104 OR P1101: CHECK THE INTAKE AIR SYSTEM FOR LEAKS, OBSTRUCTIONS, AND DAMAGE 
    • Check the air inlet system (air cleaner, housing, ductwork) for obstructions or blockage.
    • Check for broken/loose air outlet tube clamps (throttle body and air cleaner assembly ends), cracks/holes in the air outlet tube, and worn gaskets between the MAF sensor and the air cleaner assembly. Verify the MAF sensor is connected. Repair as necessary.

    Are there any concerns found during the visual inspection? 

    Yes No
    Key in OFF position.
    REPAIR as necessary.    		 GO to  DC6.
  6. DC6 CHECK THE MAF PID 
    • Start the engine using the engine running diagnostic mode. Refer to DIAGNOSTIC MODES .
    • Run the engine up to 1,500 RPM for 5 seconds, then bring it back to idle.
    • Access the PCM and monitor the MAF V PID.

    Is the voltage less than 0.23 V? 

    Yes No
    Key in OFF position.
    GO to  DC9.    		 Key in OFF position.
    GO to  DC7.
  7. DC7 CHECK THE MAF SIGNAL 
    NOTE: DTC P1101 can be generated by a low charged 12 volt battery or the garage exhaust ventilation system. Repair the 12 volt battery as necessary, then remove the ventilation system and properly vent to the outside atmosphere. Check the air inlet system (air cleaner, housing, ductwork) for obstructions or blockage. Repeat the KOEO self-test.
    • Key in ON position.
    • Access the PCM and monitor the MAF V PID.

    Is the voltage less than 0.2 V? 

    Yes No
    GO to  DC8. Key in OFF position.
    GO to  DC9.
  8. DC8 CHECK THE MAF SIGNAL SENT TO THE PCM 
    • Key on engine running.
    • Access the PCM and monitor the MAF V PID.

    Is the voltage between 0.46 V - 2.44 V? 

    Yes No
    Unable to identify the fault at this time.
    GO to Pinpoint Test Z .    		 Key in OFF position.
    GO to  DC9.
  9. DC9 CHECK THE VPWR TO THE MAF SENSOR 
    • MAF/IAT Sensor connector disconnected.
    • Key in ON position.
    • Measure the voltage between:
      ( + ) MAF/IAT Sensor Connector, Harness Side ( - ) Vehicle Battery
      VPWR - Pin 6 Negative terminal

    Is the voltage greater than 10.5 V? 

    Yes No
    GO to  DC10. Key in OFF position. REPAIR the open circuit.
  10. DC10 CHECK THE PWRGND CIRCUIT TO THE MAF SENSOR 
    • Measure the voltage between:
      ( + ) Vehicle Battery ( - ) MAF/IAT Sensor Connector, Harness Side
      Positive terminal PWRGND - Pin 5

    Is the voltage greater than 10.5 V? 

    Yes No
    Key in OFF position.
    GO to  DC11.    		 Key in OFF position. REPAIR the open circuit.
  11. DC11 CHECK FOR SHORTS BETWEEN CIRCUITS IN THE MAF HARNESS 
    • PCM connector disconnected.
    • MAF Sensor connector disconnected.
    • Measure the resistance between:
      ( + ) MAF/IAT Sensor Connector, Harness Side ( - ) MAF/IAT Sensor Connector, Harness Side
      MAF - Pin 3 PWRGND - Pin 5
      MAF - Pin 3 MAF RTN - Pin 4
      MAF - Pin 3 SIGRTN - Pin 2
      MAF - Pin 3 IAT - Pin 1

    Are the resistances greater than 10K ohms? 

    Yes No
    GO to  DC12. REPAIR the short circuit.
  12. DC12 CHECK THE MAF RTN CIRCUIT FOR A SHORT TO PWRGND IN THE HARNESS 
    • Measure the resistance between:
      ( + ) MAF/IAT Sensor Connector, Harness Side ( - ) MAF/IAT Sensor Connector, Harness Side
      MAF RTN - Pin 4 PWRGND - Pin 5

    Is the resistance greater than 10K ohms? 

    Yes No
    GO to  DC13. REPAIR the short circuit to GND.
  13. DC13 CHECK THE MAF CIRCUIT FOR A SHORT TO PWRGND IN THE PCM 
    • PCM connector connected.
    • Measure the resistance between:
      ( + ) MAF/IAT Sensor Connector, Harness Side ( - ) MAF/IAT Sensor Connector, Harness Side
      MAF - Pin 3 PWRGND - Pin 5

    Is the resistance greater than 10K ohms? 

    Yes No
    GO to  DC14. INSTALL a new PCM. REFER to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) .
  14. DC14 CHECK THE MAF CIRCUIT VOLTAGE CYCLING INTEGRITY 
    • Key in ON position.
    • Access and record the MAF V PID reading MAF.
    • Connect a 5 amp fused jumper wire between the following:
      Point A MAF/IAT Sensor Connector, Harness Side Point B MAF/IAT Sensor Connector, Harness Side
      MAF RTN - Pin 4 PWRGND - Pin 5
      MAF - Pin 3 VPWR - Pin 6

    Does the MAF V PID change from less than 0.23 volts (closer to 0 volt) to greater than 4.50 volts? 

    Yes No
    Key in OFF position. INSTALL a new MAF sensor.
    REMOVE the jumper wire(s)
    RESET the keep alive memory (KAM). REFER to RESETTING THE KEEP ALIVE MEMORY (KAM) .    		 Key in OFF position.
    REMOVE the jumper wire(s)
    GO to  DC15.
  15. DC15 CHECK THE MAF CIRCUIT FOR AN OPEN IN THE HARNESS 
    • PCM connector disconnected.
    • Measure the resistance between:
      ( + ) PCM Connector, Harness Side ( - ) MAF/IAT Sensor Connector, Harness Side
      MAF - Pin B32 MAF - Pin 3

    Is the resistance less than 5 ohms? 

    Yes No
    GO to  DC16. REPAIR the open circuit.
  16. DC16 CHECK THE PWRGND CIRCUIT FOR AN OPEN IN THE HARNESS 
    • Measure the resistance between:
      ( + ) MAF/IAT Sensor Connector, Harness Side ( - ) Vehicle Battery
      PWRGND - Pin 5 Negative terminal

    Is the resistance less than 5 ohms? 

    Yes No
    GO to  DC17. REPAIR the open circuit.
  17. DC17 CHECK THE MAF RTN CIRCUIT FOR AN OPEN IN THE HARNESS 
    • Measure the resistance between:
      ( + ) PCM Connector, Harness Side ( - ) MAF/IAT Sensor Connector, Harness Side
      MAF RTN - Pin B43 MAF RTN - Pin 4

    Is the resistance less than 5 ohms? 

    Yes No
    INSTALL a new PCM. REFER to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) . REPAIR the open circuit.
  18. DC18 DTC P0103: CHECK THE MAF SENSOR SCREEN FOR CONTAMINATION 
    NOTE: DTC P0103 can be generated by foreign material blocking the MAF sensor screen, causing an air flow restriction.
    • Check the MAF sensor screen for contamination or blockage.
    • Check the air cleaner element and air tubes for proper installation and sealing.

    Are any concerns present? 

    Yes No
    REPAIR as necessary. GO to  DC19.
  19. DC19 DTC P0103: CHECK THE MAF SENSOR SIGNAL HIGH INPUT TO THE PCM 
    • Key in ON position.
    • Access the PCM and monitor the MAF V PID.

    Is the voltage greater than 2.44 V? 

    Yes No
    Key in OFF position.
    GO to  DC20.    		 GO to  DC22.
  20. DC20 CHECK THE MAF SENSOR SIGNAL SENT TO THE PCM 
    • MAF/IAT Sensor connector disconnected.
    • Connect a 5 amp fused jumper wire between the following:
      Point A MAF/IAT Sensor Connector, Harness Side Point B MAF/IAT Sensor Connector, Harness Side
      MAF RTN - Pin 4 PWRGND - Pin 5
    • Key in ON position.
    • Access the PCM and monitor the MAF V PID.

    Is the voltage less than 0.1 V? 

    Yes No
    Key in OFF position.
    CHECK the MAF sensor electrical connector for damage, corrosion, and water intrusion.
    If OK, INSTALL a new MAF sensor.
    RESET the keep alive memory (KAM). REFER to RESETTING THE KEEP ALIVE MEMORY (KAM) .    		 Key in OFF position.
    GO to  DC21.
  21. DC21 CHECK THE MAF CIRCUIT FOR A SHORT TO POWER 
    • PCM connector disconnected.
    • Key in ON position.
    • Measure the voltage between:
      ( + ) PCM Connector, Harness Side ( - )
      MAF - Pin B32 Ground

    Is the voltage less than 1 V? 

    Yes No
    GO to  DC23. Key in OFF position. REPAIR the short circuit to PWR.
  22. DC22 CHECK THE MAF SENSOR SIGNAL SENT TO THE PCM 
    • Start the engine using the engine running diagnostic mode. Refer to DIAGNOSTIC MODES .
    • Access the PCM and monitor the MAF V PID.
    • Monitor the MAF signal voltage while increasing the engine RPM from idle to approximately 2,500 RPM, then back to idle.

    Is the voltage between 0.23 - 4.6 V? 

    Yes No
    Key in OFF position.
    The concern is intermittent.
    GO to Pinpoint Test Z .    		 Key in OFF position.
    GO to  DC20.
  23. DC23 VERIFY THE IDLE CONCERN 

    Is there an idle concern present? 

    Yes No
    DISREGARD DTC P0103 at this time.
    Concern is elsewhere. RETURN to SYMPTOM CHARTS - HYBRID ESCAPE for further direction.    		 INSTALL a new PCM. REFER to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) .
  24. DC24 DTC P0171, P0172, P2195, P2196: (OR LEAN DRIVEABILITY CONCERNS) CHECK FOR CONDITIONS RELATED TO THE MAF SENSOR 
    • Check the air inlet system (air cleaner, housing, ductwork) for obstructions or blockage.
    • Check for broken/loose air outlet tube clamps (throttle body and air cleaner assembly ends), cracks/holes in the air outlet tube, and worn gaskets between the MAF sensor and the air cleaner assembly. Verify the MAF sensor is connected.

    Are any concerns present? 

    Yes No
    REPAIR as necessary.
    RESET the keep alive memory (KAM). REFER to RESETTING THE KEEP ALIVE MEMORY (KAM) .    		 GO to  DC25.
  25. DC25 DTC P0171, P0172, P2195, P2196: (OR LEAN DRIVEABILITY CONCERNS) CHECK CONDITIONS RELATED TO THE MAF SENSOR 
    NOTE: Most weather reports include a local barometric pressure that has been corrected to sea level. However, the BARO PID reports the actual barometric pressure for the altitude where the vehicle is being diagnosed. Local weather conditions (high or low pressure areas) will change the local barometric pressure by several inches of mercury.
    • Key on engine running.
    • Access the PCM and monitor the LONGFT1, MAF V and BARO PIDs.
    • Check that the BARO PID is approximately the same as the barometric pressure reading for the location, day, and altitude where the vehicle is being diagnosed.
      • The BARO PID values in keep alive memory require updating at high throttle openings. If the vehicle is driven down from higher altitudes for diagnosis, complete 3 or 4 heavy accelerations at greater than half-throttle to allow the BARO PID to update.
      • The BARO PID must be within +/- 6 Hz (+/- 2 in Hg) of the altitude value in the BAROMETRIC PRESSURE REFERENCE CHART  at the beginning of this pinpoint test.
      • Make BARO PID comparisons to the BAROMETRIC PRESSURE REFERENCE CHART  or daily airport barometric pressure reports, if available.
    • Check the LONGFT1 PID at idle. The PID value must be greater than -12%.
    • Check that the MAF V PID at idle and neutral is not greater than 30% of the normal MAF V listed in REFERENCE VALUES - HYBRID ESCAPE (or not greater than 1.1 volts).

    Are 2 of the 3 checks OK? 

    Yes No
    GO to  DC26. Key in OFF position.
    GO to  DC27.
  26. DC26 VERIFY THE DTC 

    Are any of the following DTCs present: P0171, P0172, P2195, or P2196? 

    Yes No
    GO to  H16. Concern is elsewhere. RETURN to SYMPTOM CHARTS - HYBRID ESCAPE for further direction.
  27. DC27 CHECK TO ISOLATE THE MAF SENSOR FROM LEAN A DRIVEABILITY OCCURRENCE 
    • Due to increasingly stringent emission/OBD requirements, a fuel system DTC on some vehicles without a noticeable driveability concern with or without the MAF sensor disconnected. Under these conditions, if the BARO_V, LONGFT1, and MAF PIDs indicate a MAF sensor concern, install a new MAF sensor.
    • MAF/IAT Sensor connector disconnected.
    • Key on engine running.
    • Drive the vehicle on the road.

    Is the lean driveability symptom (lack of power, spark knock/detonation, buck/jerk or hesitation/surge on acceleration) gone? 

    Yes No
    INSTALL a new MAF/IAT sensor.
    RESET the keep alive memory (KAM). REFER to RESETTING THE KEEP ALIVE MEMORY (KAM) .    		 GO to  DC28.
  28. DC28 VERIFY THE DTC 

    Are any of the following DTCs present: P0171, P0172, P2195, P2196? 

    Yes No
    GO to  H16. Concern is elsewhere. RETURN to SYMPTOM CHARTS - HYBRID ESCAPE for further direction.
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