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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1810 (Transfer Case - Four Wheel Drive (4WD) Systems - F-150 & Mark LT) >> Diagnostic Tests >> Four Wheel Drive (4WD) Systems - All Wheel Drive (AWD) >> Symptom Chart

Symptom Chart

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.
Symptom Chart

Condition Possible Sources Action
  • No communication with the four wheel drive (4WD) control module (PCM)
  • Scan tool
  • Data link connector (DLC)
  • 4WD control module (PCM)
  • Circuitry
  • The instrument cluster 4H indicator does not operate correctly/does not operate
  • Instrument cluster
  • Circuitry
  • 4WD control module (PCM)
  • The vehicle does not shift between AWD and 4H modes correctly
  • Mode select switch (MSS)
  • Transfer case
  • Transfer case clutch
  • 4WD control module (PCM)
  • Circuitry
  • Straightline driveline wind-up
  • Tire inflation pressure
  • Tire and wheel size
  • Tire wear
  • Axle ratio
  • Flashing 4H indicator 3 times every 2 minutes
  • Loss of CAN communication between 4WD control module (PCM) and instrument cluster
 
  • No communication with the 4WD control module (PCM)
  • The transfer case makes noise
  • Tire inflation pressure
  • Tire and wheel size
  • MAKE SURE that all tires and wheels are the same size and that the inflation pressures are correct.
 
  • Tire tread wear
  • CHECK tire tread wear to see if there is more than 0.15 mm (0.06 in) difference in tread wear between front and rear. INTERCHANGE one front wheel and one rear wheel. ROAD TEST again.
 
  • Internal components
  • OPERATE the vehicle in all transmission gears. If there is noise in the transmission in NEUTRAL, or in some gears and not in others, REMOVE and REPAIR the transmission. REFER to AUTOMATIC TRANSAXLE/TRANSMISSION - 4R70E/4R75E article. If there is noise in all gears, DISASSEMBLE the transfer case. REFER to TRANSFER CASE article. CHECK the planetary gears, the bearings, the upper and lower drive sprockets and drive chain for damage. INSTALL new parts as necessary.
 
  • Fluid level
  • FILL with automatic transmission fluid. REFER to TRANSFER CASE article.
  • The vehicle binds in turns/resists turning/pulsates/shudders in a straight line
  • Unmatched tire sizes
  • Unequal amounts of tire wear
  • Unequal tire inflation pressures
  • Unmatched front and rear axle ratios
  • Unable to duplicate customer concern
  • 4WD system and/or related components
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