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Test Procedure

WARNING: This page does not describe the selected car, but rather 30 other vehicles, including the 2004 Mercury Sable, 2004 Mercury Mountaineer, 2004 Mercury Monterey, 2004 Mercury Marauder, and 2004 Mercury Grand Marquis. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Proceed to DTC testing steps listed in FAULT CODE SETTING CONDITION  table of fault code setting condition.
FAULT CODE SETTING CONDITION

Fault Code KOEO KOER Continuous Memory
P0106 1  & 3   DM15  DM15  DM15
P0106 2  & 3   DM22  DM22  DM22
P0107 1  & 3   DM2  DM2  DM14
P0107 2  & 3   DM17  DM17  DM21
P0108 1  & 3   DM2  DM2  DM14
P0108 2  & 3   DM17  DM17  DM21
P0109 1  & 3   DM14    
P0109 2  & 3   DM21    
(1)
Vehicles with an EGR System Module (ESM)
(2)
Vehicles with a MAP or TMAP Sensor
(3)
For Vehicles with a Barometric Pressure (BARO) sensor see FAULT CODE SETTING CONDITION .
  1. DM1 DETERMINE THE COMPONENT TYPE 

    Is the vehicle equipped with an EGR System Module (ESM) type EGR? 

    Yes No
    GO to  DM2. GO to  DM17.
  2. DM2 MONITOR THE MAP_V PID 
    • Key on engine running.
    • Perform the KOER self-test.
    • Access the PCM and monitor the MAP_V PID.

    Is the voltage between 0.05 V - 4.95 V? 

    Yes No
    VERIFY the PCM is at the latest at the latest calibration level. REPROGRAM if necessary.
    Otherwise, the fault is not present at this time.    		 Key in OFF position.
    GO to  DM3.
  3. DM3 VERIFY HARNESS AND CONNECTOR INTEGRITY 
    • ESM connector disconnected.
    • Perform a thorough visual inspection of the connector, pins and the wires attaching to the pins.
    • ESM connector connected.

    Are there any concerns with the wiring or the ESM connection? 

    Yes No
    REPAIR as necessary. GO to  DM4.
  4. DM4 MONITOR THE MAP_V PID 
    • Key in ON position.
    • Perform the KOEO self-test.
    • Access the PCM and monitor the MAP_V PID.

    Is the voltage between 0.05 V - 4.95 V? 

    Yes No
    The fault is not present at this time GO to  DM5.
  5. DM5 DETERMINE THE PRESENT MAP_V PID VOLTAGE 
    • Access the PCM and monitor the MAP_V PID.

    Is the voltage less than 0.05 V? 

    Yes No
    GO to  DM6. GO to  DM9.
  6. DM6 KOEO AND KOER DTC P0107: CHECK THE VOLTAGE BETWEEN THE VREF AND SIGRTN AT THE ESM SENSOR 
    • ESM connector disconnected.
    • Key in ON position.
    • Measure the voltage between:
    ( + ) ESM Connector, Harness Side ( - ) ESM Connector, Harness Side
    VREF - Pin 2 SIGRTN - Pin 6

    Is the voltage between 4 V - 5.5 V? 

    Yes No
    Key in OFF position.
    GO to  DM7.    		 Key in OFF position.
    GO to PINPOINT TEST C step 1 .
  7. DM7 CHECK THE MAP CIRCUIT FOR A SHORT TO SIGRTN AND GND IN THE HARNESS 
    • PCM connector disconnected.
    • Measure the resistance between:
    ( + ) ESM Connector, Harness Side ( - )
    MAP - Pin 3 Ground
    • Measure the resistance between:
    ( + ) ESM Connector, Harness Side ( - ) ESM Connector, Harness Side
    MAP - Pin 3 SIGRTN - Pin 6

    Is the resistance greater than 10K ohms? 

  8. DM8 INDUCE THE OPPOSITE MAP SENSOR VOLTAGE 
    Yes No
    GO to  DM8. REPAIR the short circuit.
    • PCM connector connected.
    • Connect a 5 amp fused jumper wire between the following:
    Point A ESM Connector, Harness Side Point B ESM Connector, Harness Side
    MAP - Pin 3 VREF - Pin 2
    • Key in ON position.
    • Access the PCM and monitor the MAP_V PID.

    Is the voltage greater than 4.6 V? 

    Yes No
    Key in OFF position. INSTALL a new ESM.
    Clear the PCM DTCs. REPEAT the self-test.    		 Key in OFF position. INSTALL a new PCM.
    Refer to FLASH ELECTRICALLY ERASEABLE PROGRAMMABLE READ ONLY MEMORY - FLASH EEPROM .
  9. DM9 KOEO AND KOER DTC P0108: CHECK THE VOLTAGE BETWEEN THE VREF AND SIGRTN AT THE ESM SENSOR 
    • ESM connector disconnected.
    • Key in ON position.
    • Measure the voltage between:
    ( + ) ESM Connector, Harness Side ( - ) ESM Connector, Harness Side
    VREF - Pin 2 SIGRTN - Pin 6

    Is the voltage between 4 V - 5.5 V? 

    Yes No
    Key in OFF position.
    GO to  DM10.    		 Key in OFF position.
    GO to PINPOINT TEST C step 1 .
  10. DM10 CHECK THE MAP AND SIGRTN CIRCUIT(S) FOR AN OPEN IN THE HARNESS 
    • PCM connector disconnected.
    • Measure the resistance between:
    ( + ) PCM Connector, Harness Side ( - ) ESM Connector, Harness Side
    MAP MAP - Pin 3
    SIGRTN SIGRTN - Pin 6

    Are the resistances less than 5 ohms? 

    Yes No
    GO to  DM11. REPAIR the open circuit.
  11. DM11 CHECK THE MAP CIRCUIT FOR A SHORT TO VREF IN THE HARNESS 
    • Measure the resistance between:
    ( + ) ESM Connector, Harness Side ( - ) ESM Connector, Harness Side
    MAP - Pin 3 VREF - Pin 2

    Is the resistance greater than 10K ohms? 

    Yes No
    GO to  DM12. REPAIR the short circuit.
  12. DM12 CHECK THE MAP CIRCUIT FOR A SHORT TO VPWR IN THE HARNESS 
    • Measure the resistance between:
    ( + ) ESM Connector, Harness Side ( - ) ESM Connector, Harness Side
    MAP - Pin 3 VPWR - Pin 4

    Is the resistance greater than 10K ohms? 

    Yes No
    GO to  DM13. REPAIR the short circuit.
  13. DM13 INDUCE THE OPPOSITE MAP SENSOR VOLTAGE 
    • PCM connector connected.
    • Connect a 5 amp fused jumper wire between the following:
    Point A ESM Connector, Harness Side Point B ESM Connector, Harness Side
    MAP - Pin 3 SIGRTN - Pin 6
    • Key in ON position.
    • Access the PCM and monitor the MAP_V PID.

    Is the voltage less than 0.1 V? 

    Yes No
    Key in OFF position. INSTALL a new ESM.
    Clear the PCM DTCs. REPEAT the self-test.    		 Key in OFF position. INSTALL a new PCM.
    Refer to FLASH ELECTRICALLY ERASEABLE PROGRAMMABLE READ ONLY MEMORY - FLASH EEPROM .
  14. DM14 DTCS P0107, P0108 AND P0109: CHECK THE MAP CIRCUIT(S) FOR INTERMITTENT CONCERNS 
    • Key in ON position.
    • Access the PCM and monitor the MAP_V PID.
    • Perform a thorough wiggle test on the ESM harness.
    • Lightly tap on the ESM to simulate road shock.

    Did a sudden change in voltage occur while monitoring the PID? 

    Yes No
    ISOLATE the fault.
    REPAIR as necessary.    		 Key in OFF position.
    Unable to duplicate or identify the fault at this time.
    GO to PINPOINT TEST Z step 1 .
  15. DM15 DTC P0106: MAP RANGE/PERFORMANCE 
    NOTE: If MAP DTC(s) P0107, P0108 or P0109 are present, diagnose those DTC(s) first.

    If any Mass Air Flow (MAF) sensor related DTCs are present, diagnose those DTCs prior to diagnosing MAP DTC P0106.

    Disregard any DTC(s) generated as a result of this test.

    • Key in OFF position.
    • ESM connector disconnected.
    • Connect a 5 amp fused jumper wire between the following:
    Point A ESM Connector, Harness Side Point B ESM Connector, Component Side
    VREF - Pin 2 VREF - Pin 2
    SIGRTN - Pin 6 SIGRTN - Pin 6
    • Key on engine running.
    • Measure the voltage between:
    ( + ) ESM Connector, Component Side ( - ) Vehicle Battery
    MAP - Pin 3 Negative terminal

    Is the voltage between 1 V - 2 V? 

    Yes No
    Note the actual MAP voltage values at KOEO, idle, 1,000 and 2,000 RPM. You will use the values for comparison in the following test step.
    GO to  DM16.    		 Key in OFF position.
    CHECK the MAP circuit in ESM harness for open and short circuits, if OK REPLACE ESM.
  16. DM16 COMPARE ACTUAL MAP VOLTAGE TO MAP_V PID VOLTAGE 
    • Key in ON position.
    • Access the PCM and monitor the MAP_V PID.
    • Note the MAP_V PID voltage.
    • Key on engine running.
    • Note the MAP_V PID voltage.
    • Increase engine speed to 1,000 RPM.
    • Note the MAP_V PID voltage.
    • Increase engine speed to 2,000 RPM.
    • Note the MAP_V PID voltage.

    Does the MAP_V PID voltage stay within 0.5 volt of the actual MAP voltage? 

    Yes No
    The fault is not present at this time
    Clear the DTCs. REPEAT the self-test.    		 INSTALL a new ESM.
    Clear the PCM DTCs. REPEAT the self-test.
  17. DM17 KOEO AND KOER DTCS P0107 AND P0108: CHECK THE VOLTAGE BETWEEN THE VREF AND SIGRTN AT THE MAP/TMAP SENSOR 
    • MAP/TMAP Sensor connector disconnected.
    • Key in ON position.
    • Measure the voltage between:
    ( + ) MAP/TMAP Sensor Connector, Harness Side ( - ) MAP/TMAP Sensor Connector, Harness Side
    VREF SIGRTN

    Is the voltage between 4 V - 5.5 V? 

    Yes No
    Key in OFF position.
    GO to  DM18.    		 Key in OFF position.
    GO to PINPOINT TEST C step 1 .
  18. DM18 CHECK THE MAP/TMAP SENSOR OPERATION 
    • Connect a 5 amp fused jumper wire between the following:
    Point A MAP/TMAP Sensor Connector, Component Side Point B MAP/TMAP Sensor Connector, Harness Side
    VREF VREF
    SIGRTN SIGRTN
    • Key on engine running.
    • Measure the voltage between:
    ( + ) MAP/TMAP Sensor Connector, Harness Side ( - ) Vehicle Battery
    MAP Negative terminal
    • Briefly increase the engine RPM to 3000 then return to idle.
    • Monitor the TMAP voltage.

    Did the voltage reading rapidly increase to greater than 2 volts then rapidly decrease to less than 1 volt? 

    Yes No
    Key in OFF position.
    GO to  DM19.    		 Key in OFF position. INSTALL a new MAP/TMAP sensor.
    Clear the PCM DTCs. REPEAT the self-test.
  19. DM19 CHECK THE MAP/TMAP CIRCUIT FOR A SHORT TO VREF AND SIGRTN IN THE HARNESS 
    • PCM connector disconnected.
    • Measure the resistance between:
    ( + ) MAP/TMAP Sensor Connector, Harness Side ( - ) MAP/TMAP Sensor Connector, Harness Side
    MAP VREF
    MAP SIGRTN

    Are the resistances greater than 10K ohms? 

    Yes No
    GO to  DM20. REPAIR the short circuit.
  20. DM20 CHECK THE MAP/TMAP CIRCUIT FOR AN OPEN IN THE HARNESS 
    • Measure the resistance between:
    ( + ) PCM Connector, Harness Side ( - ) MAP/TMAP Sensor Connector, Harness Side
    MAP MAP

    Is the resistance less than 5 ohms? 

    Yes No
    INSTALL a new PCM. REFER to FLASH ELECTRICALLY ERASEABLE PROGRAMMABLE READ ONLY MEMORY - FLASH EEPROM . REPAIR the open circuit.
  21. DM21 DTCS P0107, P0108 AND P0109: CHECK THE MAP/TMAP CIRCUIT(S) FOR INTERMITTENT CONCERNS 
    • Key in ON position.
    • Access the PCM and monitor the MAP_V PID.
    • Perform a thorough wiggle test on the MAP/TMAP harness.
    • Lightly tap on the MAP/TMAP to simulate road shock.

    Did a sudden change in voltage occur while monitoring the PID? 

    Yes No
    ISOLATE the fault.
    REPAIR as necessary.    		 Key in OFF position.
    Unable to duplicate or identify the fault at this time.
    GO to PINPOINT TEST Z step 1 .
  22. DM22 DTC P0106: MAP/TMAP RANGE/PERFORMANCE 
    NOTE: If MAP DTC(s) P0107, P0108 or P0109 are present, diagnose those DTC(s) first.

    If any Mass Air Flow (MAF) sensor related DTCs are present, diagnose those DTCs prior to diagnosing MAP DTC P0106.

    Disregard any DTC(s) generated as a result of this test.

    • Key in OFF position.
    • MAP/TMAP Sensor connector disconnected.
    • Connect a 5 amp fused jumper wire between the following:
    Point A MAP/TMAP Sensor Connector, Harness Side Point B MAP/TMAP Sensor Connector, Component Side
    VREF VREF
    SIGRTN SIGRTN
    • Key on engine running.
    • Measure the voltage between:
    ( + ) MAP/TMAP Sensor Connector, Component Side ( - ) Vehicle Battery
    MAP Negative terminal

    Is the voltage between 1 V - 2 V? 

    Yes No
    Record the actual MAP/TMAP voltage values at idle, 1,000 and 2,000 RPM. You will use the values for comparison in the following test step.
    GO to  DM23.    		 Key in OFF position.
    CHECK the MAP/TMAP harness for open and short circuits
  23. DM23 COMPARE ACTUAL MAP VOLTAGE TO MAP_V PID VOLTAGE 
    • Key in ON position.
    • Access the PCM and monitor the MAP_V PID.
    • Note the MAP_V PID voltage.
    • Key on engine running.
    • Note the MAP_V PID voltage.
    • Increase engine speed to 1,000 RPM.
    • Note the MAP_V PID voltage.
    • Increase engine speed to 2,000 RPM.
    • Note the MAP_V PID voltage.

    Does the MAP_V PID voltage stay within 0.5 volt of the actual MAP voltage? 

    Yes No
    The fault is not present at this time
    Clear the DTCs. REPEAT the self-test.    		 INSTALL a new MAP/TMAP sensor.
    Clear the PCM DTCs. REPEAT the self-test.
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