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Home >> Land Rover >> 2017 >> Range Rover Autobiography >> Repair and Diagnosis >> Accessories & Equipment >> Window Motors & Regulators >> Glass, Frames & Mechanisms -- Range Rover/L405 >> Glass, Frames And Mechanisms >> Glass, Frames And Mechanisms (Diagnosis And Testing) >> Diagnosis And Testing >> Symptom Chart

Symptom Chart

SYMPTOM POSSIBLE CAUSES ACTION
Windshield heater element does not defrost
  • Fuse
  • Switch fault
  • Relay fault
  • Element fault
  • Circuit fault
NOTE:
  • Windshield heater should clear within two minutes
  • In the center of the windshield, three wires are removed by design
  • For each bank of wires: No more than one wire per side (driver or passenger side elements) may be inoperative. In addition, the two wires closest to the 'A'-pillars (one each side) and the two wires closest to the windshield centerline (one each side) may be inoperative
  • In the event of a claim for either or both banks of wires not working, prior to replacing the part:
    • Check the fuses
    • Check the operation of the heated windshield switch and relay
    • Check the element for continuity
    • Check the windshield heater element connector is securely connected to the wiring harness
    • Refer to the electrical guides and check the heated windshield circuits
Door window(s) inoperative
  • Fuse(s)
  • Door switchpack fault
  • Isolator switch fault
  • Door window motor/regulator fault
  • Door window channel/runner fault
  • Door window cable fault
  • Wiring harness fault
  • Check the fuses. Check the suspect door window operation from the individual door switchpack and from the driver door switchpack (it is unlikely that both door switchpacks would fail at the same time, so if the door window is inoperative from either door switchpack, suspect a fault other than a door switchpack)
  • If the inoperative door window is a rear unit, check the function of the isolator switch at the driver door switchpack
  • If the concern persists and a noise cannot be heard when operating the door window, GO to PINPOINT TEST B .
  • If the concern persists and a noise can be heard when operating the door window, GO to PINPOINT TEST C .
Door window(s) 'one-shot' function inoperative
  • Door window regulator motor initialization required
  • Door switchpack fault
NOTE: Do not install a new door window regulator motor for this concern
If the battery has been disconnected, carry out the initialization procedure.Refer to: DOOR WINDOW MOTOR INITIALIZATION .Check the door switchpack function after initialization
Door window(s) noisy during operation
  • Door window channel/runner fault
  • Door window cable fault
  • Door window motor/regulator fault
  • Incorrect adjustment of door window
GO to PINPOINT TEST A .
Rear window does not defrost
  • Fuse
  • Switch fault
  • Relay fault
  • Element fault
  • Circuit fault
NOTE: On some rear windows the upper elements are antenna lines, they can be identified as the word "Antenna" is written alongside them. They do not have defrost capability
Check fuse. Check the operation of the heated rear window switch and relay. Check the element for continuity. Check the heated rear window circuit. Refer to the electrical guides
Slow or partial door window operation
  • Fuse
  • Switch fault
  • Relay fault
  • Element fault
  • Circuit fault
GO to PINPOINT TEST D .
Wind noise between the door window and seal
  • Incorrect adjustment of door window
  • Door window channel/runner fault
  • Door window cable fault
  • Door window motor/regulator fault
GO to PINPOINT TEST E .
Rear door window bounce back
  • Door window motor initialization required (using IDS/SDD)
NOTE: Do not install a new door window regulator motor for this concern
Refer to IDS/SDD.
Front door window bounce back
  • Door window motor initialization required
  • Door window channel/runner fault
NOTE: Do not install a new door window regulator motor for this concern
GO to PINPOINT TEST F .