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Pinpoint Test H : Electronic Shift-On-The-Fly (ESOF) System Functional Test

WARNING: This page is about a different car, the 2017 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: 4X4 High and 4X4 Low are not intended for driving on hard/dry surfaces; using these modes while driving on these surfaces may produce noises like intermittent clunking, but will not damage driveline components.

  1. H1 CHECK FOR IPC DTCS

    • Ignition ON.

    • Enter the following diagnostic mode: IPC Self-Test.

    Does the message center display 4X2 for approximately 4 seconds? 

    Yes  If DTC U0102:00 is retrieved, REFER to: Communications Network . For all other DTCs, REFER to: Instrumentation, Message Center and Warning Chimes .
    No  GO to  H2

  2. H2 CHECK 2H OPERATION

    • Switch the MSS from 4H to 2H while monitoring the message center.

    Does the message center display 4X2 for approximately 4 seconds? 

    Yes  GO to  H5
    No  GO to  H3

  3. H3 CHECK FOR TCCM DTCS

    • Ignition ON.

    • Enter the following diagnostic mode: TCCM Self-Test.

    Are DTCs present? 

    Yes  REFER to DTC Chart: Transfer Case Control Module (TCCM) .
    No  GO to  H4

  4. H4 CHECK FOR WIND-UP IN 2H

    • Drive the vehicle on a dry, hard surface while executing turns.

    Is wind-up present in turns? 

    Yes  GO to Pinpoint Test A 
    No  To diagnose the indicator light, REFER to: Instrumentation, Message Center and Warning Chimes .

  5. H5 CHECK FOR STRAIGHTLINE WIND-UP IN 4H MODE

    • Drive the vehicle on a dry, hard surface.

    Is straightline wind-up present? 

    Yes  GO to Pinpoint Test G 
    No  GO to  H6

  6. H6 CHECK WIND-UP IN TURNS IN 4H MODE

    • Drive the vehicle in 4H mode while turning.

    Is wind-up present in turns? 

    Yes  GO to  H7
    No  GO to Pinpoint Test A 

  7. H7 CHECK 4L OPERATION

    • Bring the vehicle to a stop with the transmission in NEUTRAL and switch the MSS to 4L.

    Does the 4X4 LOW indicator illuminate correctly? 

    Yes  GO to  H10
    No  GO to  H8

  8. H8 CHECK FOR TCCM DTCS

    • Ignition ON.

    • Enter the following diagnostic mode: TCCM Self-Test.

    Are DTCs present? 

    Yes  REFER to DTC Chart: Transfer Case Control Module (TCCM) .
    No  GO to  H9

  9. H9 CHECK FOR WIND-UP IN 4L

    • Drive the vehicle on a dry, hard surface while executing turns.

    Is wind-up present in turns? 

    Yes  GO to Pinpoint Test A 
    No  GO to Pinpoint Test B 

  10. H10 CHECK FOR 4L WIND-UP IN TURNS

    • Drive the vehicle on a dry, hard surface while executing turns.

    Is wind-up present and 4L functioning? 

    Yes  GO to  H11
    No  CHECK for TCCM DTCs. REFER to DTC Chart: Transfer Case Control Module (TCCM) .

  11. H11 CHECK 4L TO 2H SHIFT

    • With the vehicle at a stop and transmission in NEUTRAL, switch the MSS from 4L to 2H.

    Does the message center display 4X2 for approximately 4 seconds? 

    Yes  GO to  H14
    No  GO to  H12

  12. H12 CHECK FOR TCCM DTCS

    • Select PARK.

    • Enter the following diagnostic mode: TCCM Self-Test.

    Are DTCs retrieved? 

    Yes  REFER to DTC Chart: Transfer Case Control Module (TCCM) .
    No  GO to  H13

  13. H13 CHECK FOR WIND-UP IN 2H

    • Switch the MSS to 2H.

    • Drive the vehicle on a dry, hard surface while executing turns.

    Is wind-up present in turns? 

    Yes  GO to Pinpoint Test B 
    No  To diagnose the 4WD indicators do not operate correctly, REFER to: Instrumentation, Message Center and Warning Chimes .

  14. H14 CHECK FOR TRANSFER CASE DISENGAGEMENT

    • Rotate the rear driveshaft while observing the front driveshaft.

    Does the front driveshaft rotate? 

    Yes  REFER to: Transfer Case .
    No  GO to  H15

  15. H15 CHECK FOR AND RH IWE DISENGAGEMENT

    NOTE: The engine must be idling during the following steps to supply the vacuum required for the IWEs to engage and disengage.

    • Start the engine.

    • Rotate the LH front tire one revolution forward and one revolution backward while observing the LH front halfshaft and U-joint.

    • Rotate the RH front tire one revolution forward and one revolution backward while observing the RH front halfshaft and U-joint.

    Does the LH or RH front halfshaft rotate? 

    Yes  GO to Pinpoint Test C 
    No  GO to  H16

  16. H16 CHECK FOR IWE VACUUM LEAKS

    • Ignition OFF.

    • Disconnect both vacuum lines from the IWE solenoid.

    • Using a 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? 

    Yes  CHECK the IWE and related components for leaks. GO to Pinpoint Test C 
    No  GO to  H17

  17. H17 CHECK 2H TO 4H SHIFT AT SPEED ABOVE 32 KM/H (20 MPH)

    • Switch the MSS to 2H.

    • NOTE: When performing 2H to 4H or 4H to 2H shift, release the accelerator pedal prior to the shift and wait until Shift in Progress disappears.

      Drive the vehicle on the road and shift from 2H to 4H while driving above 32 km/h (20 mph).

    Does the transfer case shift to 4H satisfactorily? 

    Yes  The 4WD system is functioning correctly.
    No  GO to Pinpoint Test F 
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