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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 890 (Four-Wheel Drive Systems (ESOF) - F250-F550 Super Duty) >> Diagnosis And Testing >> Four-Wheel Drive Systems - Electronic Shift >> Pinpoint Tests - Electronic Shift >> PINPOINT TEST F: THE VEHICLE DOES NOT SHIFT BETWEEN 4x4 AND 4x4 LOW MODES CORRECTLY

PINPOINT TEST F: THE VEHICLE DOES NOT SHIFT BETWEEN 4x4 AND 4x4 LOW MODES CORRECTLY

WARNING: This page is about a different car, the 2005 Ford Pickup, 2005 Ford F550 Super Duty, 2005 Ford F450 Super Duty, and 2005 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
  1. F1 CHECK THE IGNITION STATES - MONITOR THE 4WD CONTROL MODULE IGNITION PIDS 
      NOTE: If the vehicle is equipped with a manual transmission, depress the clutch pedal while turning the ignition switch to the START position.
    • Monitor the 4WD control module ignition switch PIDs while turning the ignition switch through all positions.
      4WD CONTROL MODULE IGNITION SWITCH PIDS

      Ignition Switch Position PID Expected Value
      OFF IGN_O/L OFF
      ACCESSORY IGN_ACC ACCY
      RUN IGN_R RUN
      START IGN_S START
    • Do the PID values agree with the ignition switch positions? 
  2. F2 RETRIEVE THE DIAGNOSTIC TROUBLE CODES (DTCs) 
    • Using the results from the 4WD control module self-test:
    • Are any DTCs recorded? 
    • Yes  : If DTC P0500, GO to  F17.

      If DTC B1483, GO to  F10.

      If DTC B1485, GO to  F10.

      If DTC P1812, GO to  F4.

      If DTC P1815, GO to  F4.

      If DTC P1819, GO to  F13.

    • No  : GO to F3.
  3. F3 VERIFY THE FUNCTION TEST HAS BEEN CARRIED OUT 
    • Check the previous diagnostic procedure.
    • Was the electronic shift function test carried out? 
  4. F4 CHECK THE MODE SELECT SWITCH (MSS) - MONITOR THE 4WD CONTROL MODULE PID 4WD_SW 
    • Key in ON position.
    • Monitor the 4WD control module PID 4WD_SW while cycling the MSS through 2WD, 4x4 and 4x4 LOW.
    • Do the 4WD control module PID values agree with the MSS switch positions? 
    • Yes  : GO to  F10.
    • No  : GO to F5.
  5. F5 CHECK THE MSS - ALL POSITIONS 
    • Disconnect: MSS C284.
    • Measure the resistance between MSS terminal 2 and terminal 3. Refer to the following chart:
      MSS POSITIONS - RESISTANCE

      MSS Position Resistance
      2WD 619 ohms
      4x4 270 ohms
      4x4 LOW 130 ohms
      Fig 1: Measuring Resistance Between MSS Terminal 2 And Terminal 3
      G03923727Courtesy of FORD MOTOR CO.
    • Are the resistances within the specified values? 
    • Yes  : GO to F6.
    • No  : INSTALL a new MSS. REFER to MODE SELECT SWITCH (MSS)  in this section. CLEAR the DTCs. REPEAT the self-test.
  6. F6 CHECK CIRCUIT 465 (WH/LB) FOR AN OPEN 
    • Disconnect: 4WD Control Module C281b.
    • Measure the resistance between MSS C284 pin 2, circuit 465 (WH/LB), harness side and 4WD control module C281b pin 9, circuit 465 (WH/LB), harness side.
      Fig 2: Checking Circuit 465 (WH/LB) For Open
      G03923728Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes  : GO to F7.
    • No  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
  7. F7 CHECK CIRCUIT 780 (DB) FOR A SHORT TO VOLTAGE 
    • Key in ON position.
    • Measure the voltage between 4WD control module C281b pin 2, circuit 780 (DB), harness side and ground.
      Fig 3: Checking Circuit 780 (DB) For Short To Voltage
      G03909577Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    • Yes  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
    • No  : GO to F8.
  8. F8 CHECK CIRCUIT 780 (DB) FOR AN OPEN 
    • Key in OFF position.
    • Measure the resistance between MSS C284 pin 3, circuit 780 (DB), harness side and 4WD control module C281b pin 2, circuit 780 (DB), harness side.
      Fig 4: Checking Circuit 780 (DB) For Open
      G03923730Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes  : GO to F9.
    • No  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
  9. F9 CHECK CIRCUIT 780 (DB) FOR A SHORT TO GROUND 
    • Measure the resistance between 4WD control module C281b pin 2, circuit 780 (DB), harness side and ground.
      Fig 5: Checking Circuit 780 (DB) For Short To Ground
      G03909579Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    • Yes  : GO to  F17.
    • No  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
  10. F10 CHECK THE 4WD CONTROL MODULE (GEM) BRAKE ON/OFF (BOO) PID 
    • Press and hold brake pedal.
    • Monitor the 4WD control module PID: BOO.
    • Does the 4WD control module PID: BOO read ON when the brake pedal is depressed and OFF when the brake pedal is released? 
    • Yes  : GO to  F13.
    • No  : GO to F11.
  11. F11 CHECK THE BRAKE LAMPS 
    • Press and hold the brake pedal.
    • Did the brake lamps illuminate? 
    • Yes  : GO to F12.
    • No  : REFER to EXTERIOR LIGHTING . CLEAR the DTCs. REPEAT the self-test.
  12. F12 CHECK CIRCUIT 810 (RD/LG) FOR AN OPEN 
    • Disconnect: 4WD Control Module C281a.
    • Disconnect: BPP C278.
    • Measure the resistance between BPP switch C278 pin 2, circuit 810 (RD/LG), harness side and 4WD control module C281a pin 4, circuit 810 (RD/LG), harness side.
      Fig 6: Checking Circuit 810 (RD/LG) For Open
      G03909580Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes  : GO to F13.
    • No  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
  13. F13 CHECK THE PID NTRL_SW 
    • Monitor 4WD control module PID: NTRL_SW.
    • Place the transmission in NEUTRAL
    • Verify 4WD control module PID reads NTRL.
    • Shift the transmission through all positions while monitoring 4WD control module PID NTRL_SW.
    • Does the 4WD control module PID: NTRL_SW read NTRL only for the NEUTRAL position? 
    • Yes  : GO to  F17.
    • No  : GO to F14.
  14. F14 CHECK THE VEHICLE SPEED SIGNAL 
    • Monitor anti-lock brake module (ABS) PID: R_WSSP.
    • Monitor 4WD control module PID: VSS2 while driving the vehicle 0 to 88 km/h (55 mph) at a steady rate.
    • Does the 4WD control module PID: VSS2 agree with ABS PID: R WSSP? 
  15. F15 CHECK THE SPEEDOMETER 
    • Monitor the speedometer.
    • Monitor 4WD control module PID: VSS2 while driving the vehicle 0 to 88 km/h (55 mph) at a steady rate.
    • Does the 4WD control module PID: VSS2 agree with speedometer? 
    • Yes  : REFER to INSTRUMENT CLUSTER to diagnose the speedometer. CLEAR the DTCs. TEST the system for normal operation.
    • No  : GO to F16.
  16. F16 CHECK CIRCUIT 679 (GY/BK) FOR AN OPEN 
    • Disconnect: 4WD Control Module C281b.
    • Disconnect: ABS C135.
    • Measure the resistance between 4WD control module C281b-20, circuit 679 (GY/BK), harness side and ABS C135-3, circuit 679 (GY/BK), harness side.
      Fig 7: Checking Circuit 679 (GY/BK) For Open
      G03909583Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes  : GO to F17.
    • No  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
  17. F17 CHECK FOR CORRECT MODULE OPERATION 
    • Check for:
      • corrosion
      • pushed-out pins
    • Connect any disconnected connectors making sure they seat correctly.
    • Make sure all other system connectors are fully seated.
    • Operate the system and verify the concern is still present.
    • Is the concern still present? 
    • Yes  : INSTALL a new 4WD control module. REFER to FOUR-WHEEL DRIVE (4WD) CONTROL MODULE  in this section. CLEAR the DTCs. REPEAT the self-test.
    • No  : The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.
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