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Home >> Lincoln >> 2013 >> Navigator L, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Four Wheel Drive (4WD) Systems) >> Diagnosis And Testing >> Four Wheel Drive (4WD) Systems - 1-Speed Torque-On-Demand >> Pinpoint Tests >> Pinpoint Test I: Four-Wheel Drive (4WD) System Functional Test >> Pinpoint Test I: Four-Wheel Drive (4WD) System Functional Test

Pinpoint Test I: Four-Wheel Drive (4WD) System Functional Test

WARNING: This page is about a different variant/trim than selected.
NOTE: 4H (4X4) is not intended for driving on hard/dry surfaces; using 4H mode while driving on these surfaces may produce noises like intermittent clunking, but will not damage driveline components.
  1. I1 CHECK 4X4 AUTO MODE OPERATION 
    • Ignition ON.
    • Shift the transmission in the NEUTRAL position.
    • Switch the Mode Select Switch (MSS), to AWD (AUTO) mode.
    • Are there any 4WD mode indicators present in the Instrument Cluster (IC) message center? 
      1. Yes  : GO to I2.
      2. No  : GO to  I4.
  2. I2 CHECK FOR TCCM DTCs 
    • Shift the transmission into the PARK position.
    • Ignition ON.
    • Enter the following diagnostic mode on the scan tool: Self-Test - TCCM.
    • Are DTCs present? 
      1. Yes  : REFER to the Transfer Case Control Module (TCCM) DTC Chart  in this service information for diagnosis.
      2. No  : GO to I3.
  3. I3 CHECK FOR WIND-UP IN 2H (4X2) MODE 
  4. I4 CHECK 4X4 AUTO MODE OPERATION 
    • Select 4X4 AUTO mode.
    • Does the 4X4 AUTO indicator illuminate correctly? 
      1. Yes  : GO to  I7.
      2. No  : GO to I5.
  5. I5 CHECK FOR DTCs 
    • Ignition ON.
    • Enter the following diagnostic mode on the scan tool: Self-Test - TCCM.
    • Are DTCs present? 
      1. Yes  : REFER to the Transfer Case Control Module (TCCM) DTC Chart  in this service information for diagnosis.
      2. No  : GO to I6.
  6. I6 CHECK FOR WIND-UP IN 4X4 AUTO MODE 
    • Drive the vehicle on a dry, hard surface, executing turns while applying the throttle.
    • Is wind-up present in turns? 
      1. Yes  : GO to I7.
      2. No  : GO to  I8.
  7. I7 CHECK THE 4WD PWM CLUTCH STATUS (4WD_CLTCH_OUT) PID 
    • Enter the following diagnostic mode on the scan tool: DataLogger - TCCM.
    • Monitor the 4WD_CLTCH_OUT PID.
    • Does the PID indicate 2 to 10% clutch application at closed throttle? 
      1. Yes  : GO to I8.
      2. No  : GO to  I9.
  8. I8 CHECK FOR WIND-UP IN 4WD AUTO MODE WITH 100% CLUTCH USING THE 4WD PWM CLUTCH STATUS (4WD_CLTCH_OUT) ACTIVE COMMAND 
    • Enter the following diagnostic mode on the scan tool: DataLogger - TCCM.
    • Command the 4WD_CLTCH_OUT to 100%.
    • Drive the vehicle on a dry, hard surface, executing turns.
    • Is wind-up present in turns? 
      1. Yes  : GO to I9.
      2. No  : CHECK the transfer case. REFER to TRANSFER CASE . TEST the system for normal operation.
  9. I9 CHECK AVERAGE FRONT WHEEL SPEED (FRT_WHL_SPD) AND AVERAGE REAR WHEEL SPEED (REAR_WHL_SPD) PIDs 
    • Enter the following diagnostic mode on the scan tool: DataLogger - TCCM.
    • Monitor the FRT_WHL_SPD and REAR_WHL_SPD PIDs.
    • Drive the vehicle 30 km/h (18 mph).
    • Record and compare the FRT_WHL_SPD and REAR_WHL_SPD PIDs.
    • Do the FRT_WHL_SPD and REAR_WHL_SPD PID values match within 1.5 km/h (1 mph)? 
      1. Yes  : GO to I10.
      2. No  : VERIFY all 4 tires are the same size and brand. INSTALL new tires as necessary. If the tires are OK, CHECK the ABS. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) AND STABILITY CONTROL and VERIFY that the 4 road tire sizes match. TEST the system for normal operation.
  10. I10 CHECK THE ABSOLUTE THROTTLE POSITION (TP_TCCM) PID 
    • Enter the following diagnostic mode on the scan tool: DataLogger - TCCM.
    • Ignition ON.
    • Monitor the TP_TCCM PID.
      • NOTE: The TP_TCCM PID is Accelerator Pedal Position (APP) as communicated by the PCM via High Speed Controller Area Network (HS-CAN).
    • Slowly move throttle from closed throttle to Wide Open Throttle (WOT) and observe the TP_TCCM PID.
    • Does the TP_TCCM PID value vary between 0% at closed throttle and 100% at WOT? 
      1. Yes  : GO to I11.
      2. No  : CHECK the APP sensor and/or PCM. REFER to the INTRODUCTION - GASOLINE MODELS and ENGINE CONTROLS - POWERTRAIN DTC CHARTS & DESCRIPTIONS (EXCEPT DIESEL & HYBRID) . CHECK the HS-CAN, REFER to MODULE COMMUNICATIONS NETWORK . TEST the system for normal operation.
  11. I11 CHECK 4X4 MODE OPERATION 
    • Switch the MSS to 4H mode.
    • Does the 4X4 mode indicator illuminate correctly? 
      1. Yes  : GO to  I14.
      2. No  : GO to I12.
  12. I12 CHECK FOR DTCs 
    • Shift the transmission into the PARK position.
    • Enter the following diagnostic mode on the scan tool: Self-Test - TCCM.
    • Are DTCs retrieved? 
      1. Yes  : REFER to the Transfer Case Control Module (TCCM) DTC Chart  in this service information for diagnosis.
      2. No  : GO to I13.
  13. I13 CHECK FOR WIND-UP IN 4X4 MODE 
    • Drive the vehicle on a dry, hard surface while executing turns.
    • Is wind-up present in turns? 
      1. Yes  : GO to PINPOINT TEST E .
      2. No  : GO to PINPOINT TEST D .
  14. I14 CHECK FOR STRAIGHTLINE WIND-UP IN 4X4 MODE 
    • Drive the vehicle on a dry, hard surface.
    • Is straightline wind-up present? 
      1. Yes  : GO to PINPOINT TEST G .
      2. No  : GO to I15.
  15. I15 CHECK FOR 4X4 MODE WIND-UP IN TURNS 
    • Drive the vehicle on a dry, hard surface while executing turns.
    • Is wind-up present in turns? 
      1. Yes  : GO to I16.
      2. No  : GO to PINPOINT TEST D .
  16. I16 CHECK 4X4 MODE TO 4X2 MODE SHIFT 
    • With the vehicle at rest, brake applied and transmission in NEUTRAL, switch the MSS from 4X4 mode to 4X2 mode.
    • Do the 4WD indicators turn off? 
      1. Yes  : GO to  I19.
      2. No  : GO to I17.
  17. I17 CHECK FOR DTCs 
    • Shift the transmission into the PARK position.
    • Enter the following diagnostic mode on the scan tool: Self-Test - TCCM.
    • Are DTCs retrieved? 
      1. Yes  : REFER to the Transfer Case Control Module (TCCM) DTC Chart  in this service information for diagnosis.
      2. No  : GO to I18.
  18. I18 CHECK FOR WIND-UP IN 4X2 MODE 
    • Drive the vehicle on a dry, hard surface while executing turns.
    • Is wind-up present in turns? 
      1. Yes  : GO to PINPOINT TEST D .
      2. No  : GO to PINPOINT TEST E .
  19. I19 CHECK FOR TRANSFER CASE DISENGAGEMENT 
    • With the vehicle in NEUTRAL, position it on a hoist. Refer to JACKING & LIFTING .
    • Rotate the rear driveshaft while observing the front driveshaft.
    • Does the front driveshaft rotate? 
      1. Yes  : CHECK the transfer case. REFER to TRANSFER CASE . TEST the system for normal operation.
      2. No  : GO to I20.
  20. I20 CHECK FOR LH AND RH IWE DISENGAGEMENT 
      NOTE: The engine must be at idle during the following steps.
    • Start the engine and allow it to idle.
    • Rotate the LF tire one revolution forward and one revolution backward while observing the LF halfshaft and U-joint.
    • Rotate the RF tire one revolution forward and one revolution backward while observing the RF halfshaft and U-joint.
    • Did either front axle shaft and U-joint rotate? 
      1. Yes  : GO to PINPOINT TEST C .
      2. No  : GO to I21.
  21. I21 CHECK FOR IWE VACUUM LEAKS 
    • Ignition OFF.
    • Disconnect both vacuum lines from the Integrated Wheel End (IWE) solenoid.
    • Using a hand vacuum pump, apply 508 mm (20 in) Hg of vacuum to the IWE apply vacuum circuit.
    • Observe the vacuum reading.
    • Did the vacuum drop more than 25 mm (1 in) Hg per minute? 
      1. Yes  : CHECK the IWE and related components for leaks. GO to PINPOINT TEST C .
      2. No  : GO to I22.
  22. I22 CHECK 4X2 MODE TO 4X4 MODE SHIFT AT SPEED ABOVE 32 KM/H (20 MPH) 
    • Switch the MSS to 4X2 mode.
    • Drive the vehicle on the road and switch the MSS from 4X2 mode to 4X4 mode while driving above 32 km/h (20 mph).
    • Does the transfer case shift to 4X4 mode satisfactorily? 
      1. Yes  : The 4WD system is functioning correctly.
      2. No  : GO to PINPOINT TEST E .
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