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Home >> Land Rover >> 2016 >> LR4 HSE >> Repair and Diagnosis >> Accessories & Equipment >> Window Motors & Regulators >> Glass, Frames & Mechanisms -- LR4/L319 >> Glass, Frames And Mechanisms >> Glass, Frames And Mechanisms (Diagnosis And Testing) >> Diagnosis And Testing >> Symptom Chart

Symptom Chart

SYMPTOM POSSIBLE CAUSES ACTION
Window(s) inoperative
  • Fuse(s)
  • Switch fault
  • Front switch isolator fault
  • Motor/regulator fault
  • Channel/runner fault
  • Cable fault
  • Window circuit short circuit to ground, short circuit to power, open circuit, high resistance
  • Check the fuses
  • Check the suspect window operation from the individual door switch and from the driver door master switch (it is unlikely that both switches would fail at the same time, so if the window is inoperative from either switch, suspect a fault other than a switch)
  • If the inoperative window is a rear unit, check the function of the isolator at the master switch.
  • If the concern persists and a noise cannot be heard when operating the door window glass, GO to Pinpoint Test B .
  • Refer to the appropriate system wiring diagrams and test the window circuit for short circuit to ground, short circuit to power, open circuit, high resistance
Window(s) 'one-shot' function inoperative
  • Window motor initialization required
NOTE: Do not install a new window regulator assembly or motor for this concern.
  • If the battery has been disconnected, carry out the initialization procedure
Heated rear window does not defrost
  • Heated rear window circuit short circuit to ground, open circuit, high resistance
  • Refer to the appropriate system wiring diagrams and test the heated rear window circuit for short circuit to ground, open circuit, high resistance
Window(s) noisy during operation
  • Channel/runner fault
  • Cable fault
  • Motor/regulator fault
NOTE:
  • Door window glass retaining bracket adjustment procedure
  • Do not install a new window regulator assembly for this concern.
Slow or partial window operation
  • Fuse
  • Switch fault
  • Relay fault
  • Element fault
  • Circuit fault
Rear door window glass bounce back
  • Window motor initialization required (using the manufacturers approve diagnostic system)
NOTE: Do not install a new window regulator assembly or motor for this concern.
  • Using the manufacturer approved diagnostic system, perform the window initialization routine
Front door window glass bounce back
  • Window motor initialization required
  • Channel/runner fault
NOTE: Do not install a new window regulator assembly for this concern.