Code
B1191
LAND ROVER
B — Body
Right rear door glass panel
Views:
UK: 10
EN: 20
RU: 12
AI status
Completed
Completed
100%
Causes
- Failed or seized window regulator or motor
- Window glass off-track or mechanically obstructed
- Faulty window switch (right rear)
- Damaged wiring, chafed harness or corroded connector in right rear door
- Poor ground or low battery voltage to motor/control
- Door control module (BCM/RDM) fault or software error
Symptoms
- Right rear window will not move up or down
- Window moves slowly or intermittently
- Grinding or unusual noise from right rear door when operating window
- Window stops part-way or drops down unexpectedly
- Door/module may log related communication or position faults
What to check
- Retrieve code and any freeze-frame or related UCE/BCM codes with a diagnostic scanner
- Attempt to operate right rear window with vehicle ignition on and note behavior and noises
- Visually inspect right rear door area: door trim, weatherstrip and glass track for obstructions or damage
- Inspect wiring harness and connectors at door hinge, motor and switch for corrosion, pin damage or loose contacts
- Check fuses and relays related to power windows
- Check for other body/control module codes that may indicate communication issues
Signal parameters
- Battery voltage at window motor (should be ~12.0–14.5 V during operation)
- Motor supply voltage on ‘up’ and ‘down’ commands (should switch polarity for DC motors)
- Ground continuity and resistance to chassis ground (
- Switch input states (up/down) as read by body control module or scanner
- Motor current draw during operation (stall/overload typically >10–20 A depending on motor)
- CAN bus or body module messages for window position or door status (presence/communication)
Diagnostic algorithm
- Connect an approved scan tool, read and record B1191 and any related codes, note freeze frame data
- Attempt to reproduce the fault while observing the scan tool for live data (switch inputs, module outputs, position/status)
- Visually inspect the right rear door: remove trim if necessary and look for mechanical obstructions, broken regulator components, detached glass or foreign objects
- With ignition ON, operate the window and use a multimeter to measure voltage at the motor connector while activating the switch (verify correct polarity swap or commanded voltage)
- If no voltage at motor but switch commands present at module, measure for continuity/voltage at switch and at module output; inspect and repair harness/connectors as required (pay attention to hinge flex area)
- If motor receives correct voltage but window does not move, check motor current draw. High current or no movement indicates seized motor or broken regulator; replace regulator/motor assembly as needed
- If motor works when powered directly but not via vehicle wiring, suspect switch or module. Test/replace the switch and if necessary test door control module outputs or replace module following manufacturer procedures
- After any repair, reassemble, perform window limit learning/recalibration if required by manufacturer, clear codes and re-test multiple cycles to confirm repair
- If intermittent or unexplained failures persist, inspect CAN/bus communications and perform module diagnostics or software updates at dealer-level tools
Likely causes
- Window regulator or motor failure
- Glass binding/off-track or foreign object obstructing movement
- Damaged/loose connector or wire to motor or switch
- Failed door/window control module output
Fault status
Status
B1191 — Right Rear Door Glass Panel: fault in window motor/regulator, wiring, switch or door control. Inspect right rear window system.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
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