LEMON Manuals: Even more car manuals for everyone
Home >> Ford >> 2000 >> Taurus LX, 3.0 2, AX4N >> Repair and Diagnosis >> External Pages >> Different car >> Section 596 (Transfer Case - Four Wheel Drive (4WD) Systems -- F250-F550 Super Duty) >> Diagnosis And Testing >> Four Wheel Drive (4WD) Systems - Electronic Shift >> Inspection and Verification

Inspection and Verification

WARNING: This page is about a different car, the 2006 Ford Pickup, 2006 Ford F550 Super Duty, 2006 Ford F450 Super Duty, and 2006 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
  1. Verify the customer concern.
  2. Visually inspect for obvious signs of mechanical or electrical damage.
    VISUAL INSPECTION CHART

    Mechanical Electrical
    • Front axle assembly
    • Pulse vacuum hublocks (PVH)
    • Shift motor
    • Synchronization clutch
    • Driveshaft and universal joints
    • Vacuum leaks
    • Fluid leaks
    • Matching tire sizes
    • Transfer case
    • Battery junction box (BJB) fuse 3 (30A)
    • Central junction box (CJB) fuse:
      • 19 (10A)
      • 27 (15A)
      • 33 (15A)
      • 45 (10A)
    • Wiring harness
    • 4WD control module (GEM)
    • Shift relays
    • Shift motor encoder assembly
    • Mode select switch (MSS)
    • Connector(s)
    • PVH solenoid assembly
    • Vacuum solenoid (diesel only)
    • Circuitry
  3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
  4. If the cause is not visually evident, connect the diagnostic tool to the data link connector and select the vehicle to be tested from the diagnostic tool menu. If the diagnostic tool does not communicate with the vehicle:
    • check that the program card is correctly installed (if using NGS+).
    • check the connections to the vehicle.
    • check the ignition switch position.
  5. If the diagnostic tool still does not communicate with the vehicle, refer to the diagnostic tool's operating manual.
  6. Carry out the data link diagnostics test. If the diagnostic tool responds with:
    • SCP+, SCP-, UBP, CAN or ISO circuits fault; all electronic control units no response/not equipped, refer to MODULE COMMUNICATIONS NETWORK .
    • No response/not equipped for powertrain control module (PCM). Refer to MODULE COMMUNICATIONS NETWORK to diagnose module communication problems.
    • No response/not equipped for 4WD control module, GO to PINPOINT TEST G .
    • System passed, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs and carry out the self-test diagnostics for the 4WD control module.
  7. If the DTCs retrieved are related to the concern, go to the FOUR-WHEEL DRIVE (4WD) DIAGNOSTIC TROUBLE CODE (DTC) INDEX  to continue diagnostics.
  8. If no DTCs related to the concern are retrieved, GO to the SYMPTOM CHART .
scientia non olet · About LEMON Manuals