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Home >> Ford >> 2009 >> Flex Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 701 (Transfer Case - Four Wheel Drive (4WD) Systems - F-150 & Mark LT) >> Diagnostic Tests >> Four Wheel Drive (4WD) Systems - All Wheel Drive (AWD) >> Pinpoint Tests >> Pinpoint Test X: All Wheel Drive (AWD) System Functional Test >> Pinpoint Test X: All Wheel Drive (AWD) System Functional Test

Pinpoint Test X: All Wheel Drive (AWD) System Functional Test

WARNING: This page is about a different car, the 2007 Lincoln Mark LT and 2007 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: 4H mode is not intended for driving on hard/dry surfaces.
  1. X1 CHECK FOR 4H INDICATOR PROVE OUT 
    • Key in ON position.
    • Does the 4H indicator illuminate at prove out? 
    1. YES  : Go to  X2.
    2. NO  : CHECK the instrument cluster for faults. REFER to INSTRUMENT CLUSTER article.
  2. X2 CHECK AWD OPERATION 
    • Select AWD mode.
    • Is the 4H indicator illuminated? 
    1. YES  : Go to  X3.
    2. NO  : Go to  X5.
  3. X3 CHECK FOR DTCs 
    • Connect the diagnostic tool.
    • Carry out the on-demand self test.
    • Are DTCs retrieved? 
    1. YES  : REFER to theFour Wheel Drive (4WD) Control Module Diagnostic Trouble Code (DTC) Chart  for diagnosis.
    2. NO  : Go to  X4.
  4. X4 CHECK FOR WIND-UP IN AWD MODE 
    • Drive the vehicle on a dry, hard surface while executing turns.
    • Is wind-up present in turns? 
    1. YES  : Go to Pinpoint Test T .
    2. NO  : Go to Pinpoint Test U .
  5. X5 CHECK THE TRANSFER CASE CLUTCH DUTY CYCLE PID 
    • Enter the following diagnostic mode on the diagnostic tool: PID/DATA Monitor and Record
    • Monitor the transfer case clutch duty cycle (pulse width modulated-[PWM]) PID at closed throttle.
    • Does the clutch duty cycle PID indicate 2 to 4% clutch at closed throttle? 
    1. YES  : Go to  X6.
    2. NO  : Go to Pinpoint Test T .
  6. X6 CHECK SHAFT SPEED PIDS 
    • Enter the following diagnostic mode on the diagnostic tool: PID/DATA Monitor and Record
    • Monitor the transfer case front and rear shaft speeds.
    • Drive the vehicle 30 km/h (18 mph).
    • Record and compare the front wheel speed and the rear wheel speed.
    • Do the front shaft speed and rear shaft speed values match within 1.5 km/h (1 mph)? 
    1. YES  : Go to  X7.
    2. NO  : CHECK the ABS system. REFER to VEHICLE DYNAMIC SYSTEMS article and VERIFY that the 4 road tires sizes match.
  7. X7 CHECK THE THROTTLE POSITION OUTPUT PID 
    • Enter the following diagnostic mode on the diagnostic tool: PID/DATA Monitor and Record
    • Monitor the throttle position output PID.
    • Slowly move the throttle from closed throttle to WOT and observe the throttle position output PID.
    • Does the value vary between 0% at closed throttle and 100% at WOT? 
    1. YES  : Go to  X8.
    2. NO  : CHECK the throttle position sensor and/or PCM for faults. Refer to INTRODUCTION - GASOLINE ENGINES article.
  8. X8 CHECK FOR WIND-UP IN TURNS ON THROTTLE 
    • Drive the vehicle on a dry, hard surface in turns while applying the throttle.
    • Is wind-up present in turns? 
    1. YES  : CHECK the transfer case. REFER to TRANSFER CASE article.
    2. NO  : Go to  X9.
  9. X9 CHECK 4H OPERATION 
    • Select 4H mode.
    • Does the 4H indicator illuminate? 
    1. YES  : Go to  X10.
    2. NO  : Go to  X11.
  10. X10 CHECK FOR 4H WIND-UP 
    • Drive the vehicle on a dry, hard surface in turns while applying the throttle.
    • Is wind-up present in turns? 
    1. YES  : Go to  X13.
    2. NO  : Go to Pinpoint Test T .
  11. X11 CHECK FOR DTCs 
    • Connect the diagnostic tool.
    • Carry out the on-demand self test.
    • Are DTCs retrieved? 
    1. YES  : REFER to the Four Wheel Drive (4WD) Control Module Diagnostic Trouble Code (DTC) Chart  for diagnosis.
    2. NO  : Go to  X12.
  12. X12 CHECK FOR WIND-UP IN 4H MODE ON THROTTLE 
    • Drive the vehicle on a dry, hard surface in turns while applying the throttle.
    • Is wind-up present in turns? 
    1. YES  : Go to Pinpoint Test U .
    2. NO  : Go to Pinpoint Test T .
  13. X13 CHECK AWD OPERATION 
    • Select AWD mode.
    • Did the 4H indicator turn OFF? 
    1. YES  : The 4WD system is operating correctly.
    2. NO  : Go to  X14.
  14. X14 CHECK FOR DTCs 
    • Connect the diagnostic tool.
    • Carry out the on-demand self test.
    • Are DTCs retrieved? 
    1. YES  : REFER to the Four Wheel Drive (4WD) Control Module Diagnostic Trouble Code (DTC) Chart  for diagnosis.
    2. NO  : Go to  X15.
  15. X15 CHECK FOR WIND-UP IN AWD MODE 
    • Drive the vehicle on a dry, hard surface while executing turns.
    • Is wind-up present in turns? 
    1. YES  : Go to Pinpoint Test U .
    2. NO  : Go to Pinpoint Test T .
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