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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1334 (Engine Controls - Pinpoint Tests - 6.0L (99P F450/550) Diesel) >> Pinpoint Test E: Manifold Absolute Pressure (MAP) Sensor >> Test Procedure

Test Procedure

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  1. E1 PRELIMINARY DIAGNOSIS FOR DIAGNOSTIC TROUBLE CODE (DTC) P0236, P0237, OR P0238 
    • Carry out a visual inspection.
    • Retrieve and record all DTCs.
    • Record the freeze frame data.
    • Clear the DTCs.
    • Carry out the KOEO and KOER self-test.

    Are DTCs P0236, P0237 or P0238 present? 

    Yes No
    For DTC P0236, GO to  E2.
    For DTC P0237, GO to  E7.
    For DTC P0238, GO to  E11.    		 UNABLE to duplicate the condition. CHECK for a loose connection, and damaged or corroded terminals. WIGGLE the harness attempting to recreate the fault. REPAIR as necessary. REFER to SYMPTOM CHARTS , if a driveability concern exists.
  2. E2 DIAGNOSTIC TROUBLE CODE (DTC) P0236 
    • Possible causes:
      • restricted MAP hose
      • low turbo boost
      • intake manifold
      • restricted MAP sensor
      • PCM
    • Carry out a visual inspection.
    • Inspect the MAP sensor hose and manifolds for damage, leaks, restrictions, and correct routing.

    Are the manifolds and MAP sensor hose OK and free of damage? 

    Yes No
    GO to  E3. REPAIR as necessary.
    CLEAR the DTCs. REPEAT the self-test.
  3. E3 CHECK THE MAP SENSOR 
    NOTE: Refer to the MAP sensor voltage table at the beginning of the pinpoint test.
    • Access the PCM and monitor the MAP_V PID.
    • Key ON, engine OFF.

    Is the voltage within 0.5 volt for the given altitude? 

    Yes No
    GO to  E4. INSTALL a new MAP sensor. CLEAR the DTCs.
    REPEAT the self-test.
  4. E4 CHECK THE MAP SENSOR VOLTAGE 
    NOTE: DTC P0069 MAP/Barometric Pressure Correlation will set.
    • Disconnect the pressure hose from the MAP sensor.
    • Key ON, engine OFF.
    • Using the Pressure Adapter Kit 014-00761, or equivalent (gauge bar), apply 69 kPa (10 psi) of pressure to the MAP sensor.
    • Measure the voltage between:
      ( + ) MAP Sensor Connector, Harness Side ( - )
      MAP - Pin 2 Ground

    Is the voltage between 2.5 - 3.1 V? 

    Yes No
    GO to  E5. INSTALL a new MAP sensor. CLEAR the DTCs.
    REPEAT the self-test.
  5. E5 CHECK THE MAP SENSOR PERFORMANCE 
    • Connect the pressure hose to the MAP sensor.
    • Disconnect the MAP sensor pressure hose from the intake manifold and install a pressure (boost) gauge.
    • Record the gauge pressure.
    • Road test the vehicle and accelerate the vehicle to achieve full boost.

    Does the boost pressure exceed 82 kPa (12 psi) at full acceleration/boost and return to the recorded gauge pressure at idle? 

    Yes No
    GO to  E6. INSPECT the intake manifolds for leaks. CHECK the turbo condition. REFER to FUEL CHARGING AND CONTROLS .
    CLEAR the DTCs. REPEAT the self-test.
  6. E6 CHECK FOR THE PRESENCE OF DTC P0236 
    • Clear the DTCs.
    • Carry out the KOEO and KOER self-test.

    Is DTC P0236 present? 

    Yes No
    GO to  E14. The test is complete.
  7. E7 DIAGNOSTIC TROUBLE CODE (DTC) P0237 
    NOTE: Refer to the PCM and component connector pin numbers at the beginning of this pinpoint test.
    • Possible causes:
      • MAP signal circuit open or shorted to ground
      • open VREF circuit
      • MAP sensor
      • PCM
    • Key in OFF position.
    • MAP Sensor connector disconnected.
    • Key ON, engine OFF.
    • Measure the voltage between:
      ( + ) MAP Sensor Connector, Harness Side ( - ) MAP Sensor Connector, Harness Side
      VREF - Pin 1 SIGRTN - Pin 3

    Is the voltage between 4.5 - 5.5 V? 

    Yes No
    GO to  E8. REPAIR the open circuit. CLEAR the DTCs.
    REPEAT the self-test.
  8. E8 CHECK THE MAP SIGNAL CIRCUIT FOR A SHORT TO GROUND 
    • Key in OFF position.
    • PCM connector disconnected.
    • Measure the resistance between:
      ( + ) MAP Sensor Connector, Harness Side ( - )
      MAP - Pin 2 Ground

    Is the resistance greater than 10K ohms? 

    Yes No
    GO to  E9. REPAIR the short circuit. CLEAR the DTCs.
    REPEAT the self-test.
  9. E9 CHECK THE MAP SIGNAL CIRCUIT FOR AN OPEN 
    • Measure the resistance between:
      ( + ) MAP Sensor Connector, Harness Side ( - ) PCM Connector, Harness Side
      MAP - Pin 2 MAP - Pin B41

    Is the resistance less than 5 ohms? 

    Yes No
    GO to  E10. REPAIR the open circuit. CLEAR the DTCs.
    REPEAT the self-test.
  10. E10 CHECK THE MAP SENSOR CIRCUIT 
    NOTE: This step may cause DTC P0238 to set.
    • PCM connector connected.
    • Key ON, engine OFF.
    • Access the PCM and monitor the MAP_V PID.
    • Connect a 5 amp fused jumper wire between the following:
    Point A MAP Sensor Connector, Harness Side Point B MAP Sensor Connector, Harness Side
    VREF - Pin 1 MAP - Pin 2

    Is the voltage between 4.5 - 5.5 V? 

    Yes No
    INSTALL a new MAP sensor. CLEAR the DTCs.
    REPEAT the self-test.    		 GO to  E14.
  11. E11 DIAGNOSTIC TROUBLE CODE (DTC) P0238 
    NOTE: Visually inspect the vehicle for aftermarket accessories and performance modifications (exhaust system, turbocharger, performance chip). Refer to DIESEL ELECTRONIC ENGINE CONTROL (EEC) SYSTEM , Modifications to OBD Vehicles.
    NOTE: Refer to the PCM and component connector pin numbers at the beginning of this pinpoint test.
    • Possible causes:
      • signal circuit short to power
      • open ground circuit
      • MAP sensor
      • PCM
    • Clear the DTCs.
    • MAP Sensor connector disconnected.
    • The MAP sensor is disconnected to simulate the opposite DTC.
    • Carry out the KOEO and KOER self-test.

    Is DTC P0237 present? 

    Yes No
    INSTALL a new MAP sensor. CLEAR the DTCs.
    REPEAT the self-test.    		 GO to  E12.
  12. E12 CHECK THE MAP SENSOR SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE 
    • Key in OFF position.
    • PCM connector disconnected.
    • Key ON, engine OFF.
    • Measure the voltage between:
      ( + ) MAP Sensor Connector, Harness Side ( - )
      MAP - Pin 2 Ground

    Is the voltage less than 0.2 V? 

    Yes No
    GO to  E13. REPAIR the short circuit. CLEAR the DTCs.
    REPEAT the self-test.
  13. E13 CHECK THE MAP SENSOR SIGNAL RETURN CIRCUIT FOR AN OPEN 
    • Key in OFF position.
    • Measure the resistance between:
      ( + ) MAP Sensor Connector, Harness Side ( - ) PCM Connector, Harness Side
      SIGRTN - Pin 3 SIGRTN - Pin B33

    Is the resistance less than 5 ohms? 

    Yes No
    GO to  E14. REPAIR the open circuit. CLEAR the DTCs.
    REPEAT the self-test.
  14. E14 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 and 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) . The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
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