Code
B1407
ALFA ROMEO
B — Body
Driver window closing circuit
Views:
UK: 6
EN: 8
RU: 8
AI status
Completed
Completed
100%
Causes
- Blown fuse or relays for power windows
- Faulty driver window switch (stuck, intermittent contacts)
- Failed window motor or worn brushes
- Damaged wiring harness, broken wire or corroded connector in driver door harness (including pinched wires in the hinge area)
- Faulty body control module / window control module
- Water ingress or corrosion at connectors or in the switch assembly
Symptoms
- Driver window will not close when commanded or stops before full close
- Window moves slowly or intermittently in the close direction
- Window reverses or opens unexpectedly when closing (anti-pinch behavior)
- Stored B1407 fault and possibly related body control messages or warnings
- Noise from motor or grinding when attempting to close
What to check
- Retrieve and record all stored codes with a compatible scan tool, note freeze frame or live data during an operation
- Visually inspect fuses and relays for power window circuits; check fuse continuity
- Inspect driver door wiring harness, especially through the door hinge boot, for chafing, broken wires or corrosion
- Check connectors at the switch, motor/regulator and control module for corrosion, bent pins or poor mating
- Operate the driver window while observing connector terminals for voltage changes and secure connections
- Listen for motor noise and feel for regulator movement; check for mechanical obstruction by moving the glass manually with power off (carefully)
Signal parameters
- Battery voltage at rest: ~12.0–12.8 V; running ~13.5–14.5 V. Supply to motor when commanded should be near battery voltage.
- Switch command signal: when switch is pressed for close/open the control input should change state (0 V to ~battery voltage or ground) — varies by vehicle architecture.
- Motor supply under no-load run: typically draws 2–10 A; under load or stall current may exceed 15–30 A depending on motor. A sustained stall current is abnormal.
- Position/limit sensor (if equipped) or anti-pinch feedback: typically a discrete state (open/closed) or resistance/voltage that changes at end-of-travel. Compare to factory values.
Diagnostic algorithm
- Safety first — ensure ignition and power window operation is safe; support glass to prevent dropping during tests.
- Scan for codes: read B1407 and any related codes. Clear codes and attempt to reproduce to verify persistence.
- Check fuses/relays: verify continuity and that power is present at the window motor feed with ignition ON and while attempting to close the window.
- Operate the switch while measuring voltage at the motor connector: verify motor supply polarity and voltage when close command given. If no voltage, trace back to switch and control module.
- Inspect and wiggle the door harness in the hinge area while operating the switch to reveal intermittent wiring faults.
- Test the driver window switch: measure switch outputs or substitute a known-good switch if available.
- Bench test the motor by applying 12 V directly to the motor terminals (observe polarity for direction). If motor does not run or runs weakly/roughly, replace motor.
- Measure motor current while operating. Excessive current can indicate regulator binding or a failing motor. If current is excessive, inspect/regreplace regulator or free the glass tracks.
- Check ground integrity: measure voltage drop between motor ground and battery negative while operating; excessive drop indicates bad ground.
- Inspect anti-pinch/limit sensor inputs (if equipped) and verify correct operation or continuity. Replace sensor/module if faulty.
- If wiring and components test good but control signals from the body/window module are absent or erratic, test module outputs and inputs per factory procedure and consider module repair or replacement.
- After repairs, clear codes and perform several full up/down cycles to confirm normal operation and no fault reoccurrence.
Likely causes
- Intermittent or failed driver window switch
- Corroded connector or damaged wiring in door harness (common at hinge boot)
- Window motor starting to fail (high current draw or intermittent operation)
- Mechanical regulator binding causing excessive motor load
Fault status
Status
B1407 — Driver window closing circuit fault: the control module detected an abnormal or missing signal while commanding the driver window to close; action required to inspect switch, motor, wiring, and related sensors.
Repair difficulty: Medium
Diagnostic time: 0.5-1.5 hours
Similar codes
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Code
B1407
FIAT
B — Body
Driver window closing circuit
Views:
UK: 6
EN: 9
RU: 9
AI status
Completed
Completed
100%
Causes
- Blown fuse or relays for power windows
- Faulty driver window switch (stuck, intermittent contacts)
- Failed window motor or worn brushes
- Damaged wiring harness, broken wire or corroded connector in driver door harness (including pinched wires in the hinge area)
- Faulty body control module / window control module
- Water ingress or corrosion at connectors or in the switch assembly
Symptoms
- Driver window will not close when commanded or stops before full close
- Window moves slowly or intermittently in the close direction
- Window reverses or opens unexpectedly when closing (anti-pinch behavior)
- Stored B1407 fault and possibly related body control messages or warnings
- Noise from motor or grinding when attempting to close
What to check
- Retrieve and record all stored codes with a compatible scan tool, note freeze frame or live data during an operation
- Visually inspect fuses and relays for power window circuits; check fuse continuity
- Inspect driver door wiring harness, especially through the door hinge boot, for chafing, broken wires or corrosion
- Check connectors at the switch, motor/regulator and control module for corrosion, bent pins or poor mating
- Operate the driver window while observing connector terminals for voltage changes and secure connections
- Listen for motor noise and feel for regulator movement; check for mechanical obstruction by moving the glass manually with power off (carefully)
Signal parameters
- Battery voltage at rest: ~12.0–12.8 V; running ~13.5–14.5 V. Supply to motor when commanded should be near battery voltage.
- Switch command signal: when switch is pressed for close/open the control input should change state (0 V to ~battery voltage or ground) — varies by vehicle architecture.
- Motor supply under no-load run: typically draws 2–10 A; under load or stall current may exceed 15–30 A depending on motor. A sustained stall current is abnormal.
- Position/limit sensor (if equipped) or anti-pinch feedback: typically a discrete state (open/closed) or resistance/voltage that changes at end-of-travel. Compare to factory values.
Diagnostic algorithm
- Safety first — ensure ignition and power window operation is safe; support glass to prevent dropping during tests.
- Scan for codes: read B1407 and any related codes. Clear codes and attempt to reproduce to verify persistence.
- Check fuses/relays: verify continuity and that power is present at the window motor feed with ignition ON and while attempting to close the window.
- Operate the switch while measuring voltage at the motor connector: verify motor supply polarity and voltage when close command given. If no voltage, trace back to switch and control module.
- Inspect and wiggle the door harness in the hinge area while operating the switch to reveal intermittent wiring faults.
- Test the driver window switch: measure switch outputs or substitute a known-good switch if available.
- Bench test the motor by applying 12 V directly to the motor terminals (observe polarity for direction). If motor does not run or runs weakly/roughly, replace motor.
- Measure motor current while operating. Excessive current can indicate regulator binding or a failing motor. If current is excessive, inspect/regreplace regulator or free the glass tracks.
- Check ground integrity: measure voltage drop between motor ground and battery negative while operating; excessive drop indicates bad ground.
- Inspect anti-pinch/limit sensor inputs (if equipped) and verify correct operation or continuity. Replace sensor/module if faulty.
- If wiring and components test good but control signals from the body/window module are absent or erratic, test module outputs and inputs per factory procedure and consider module repair or replacement.
- After repairs, clear codes and perform several full up/down cycles to confirm normal operation and no fault reoccurrence.
Likely causes
- Intermittent or failed driver window switch
- Corroded connector or damaged wiring in door harness (common at hinge boot)
- Window motor starting to fail (high current draw or intermittent operation)
- Mechanical regulator binding causing excessive motor load
Fault status
Status
B1407 — Driver window closing circuit fault: the control module detected an abnormal or missing signal while commanding the driver window to close; action required to inspect switch, motor, wiring, and related sensors.
Repair difficulty: Medium
Diagnostic time: 0.5-1.5 hours
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Code
B1407
LAND ROVER
B — Body
Trailer control module
Views:
UK: 6
EN: 10
RU: 10
AI status
Completed
Completed
100%
Causes
- Blown fuse or relays for power windows
- Faulty driver window switch (stuck, intermittent contacts)
- Failed window motor or worn brushes
- Damaged wiring harness, broken wire or corroded connector in driver door harness (including pinched wires in the hinge area)
- Faulty body control module / window control module
- Water ingress or corrosion at connectors or in the switch assembly
Symptoms
- Driver window will not close when commanded or stops before full close
- Window moves slowly or intermittently in the close direction
- Window reverses or opens unexpectedly when closing (anti-pinch behavior)
- Stored B1407 fault and possibly related body control messages or warnings
- Noise from motor or grinding when attempting to close
What to check
- Retrieve and record all stored codes with a compatible scan tool, note freeze frame or live data during an operation
- Visually inspect fuses and relays for power window circuits; check fuse continuity
- Inspect driver door wiring harness, especially through the door hinge boot, for chafing, broken wires or corrosion
- Check connectors at the switch, motor/regulator and control module for corrosion, bent pins or poor mating
- Operate the driver window while observing connector terminals for voltage changes and secure connections
- Listen for motor noise and feel for regulator movement; check for mechanical obstruction by moving the glass manually with power off (carefully)
Signal parameters
- Battery voltage at rest: ~12.0–12.8 V; running ~13.5–14.5 V. Supply to motor when commanded should be near battery voltage.
- Switch command signal: when switch is pressed for close/open the control input should change state (0 V to ~battery voltage or ground) — varies by vehicle architecture.
- Motor supply under no-load run: typically draws 2–10 A; under load or stall current may exceed 15–30 A depending on motor. A sustained stall current is abnormal.
- Position/limit sensor (if equipped) or anti-pinch feedback: typically a discrete state (open/closed) or resistance/voltage that changes at end-of-travel. Compare to factory values.
Diagnostic algorithm
- Safety first — ensure ignition and power window operation is safe; support glass to prevent dropping during tests.
- Scan for codes: read B1407 and any related codes. Clear codes and attempt to reproduce to verify persistence.
- Check fuses/relays: verify continuity and that power is present at the window motor feed with ignition ON and while attempting to close the window.
- Operate the switch while measuring voltage at the motor connector: verify motor supply polarity and voltage when close command given. If no voltage, trace back to switch and control module.
- Inspect and wiggle the door harness in the hinge area while operating the switch to reveal intermittent wiring faults.
- Test the driver window switch: measure switch outputs or substitute a known-good switch if available.
- Bench test the motor by applying 12 V directly to the motor terminals (observe polarity for direction). If motor does not run or runs weakly/roughly, replace motor.
- Measure motor current while operating. Excessive current can indicate regulator binding or a failing motor. If current is excessive, inspect/regreplace regulator or free the glass tracks.
- Check ground integrity: measure voltage drop between motor ground and battery negative while operating; excessive drop indicates bad ground.
- Inspect anti-pinch/limit sensor inputs (if equipped) and verify correct operation or continuity. Replace sensor/module if faulty.
- If wiring and components test good but control signals from the body/window module are absent or erratic, test module outputs and inputs per factory procedure and consider module repair or replacement.
- After repairs, clear codes and perform several full up/down cycles to confirm normal operation and no fault reoccurrence.
Likely causes
- Intermittent or failed driver window switch
- Corroded connector or damaged wiring in door harness (common at hinge boot)
- Window motor starting to fail (high current draw or intermittent operation)
- Mechanical regulator binding causing excessive motor load
Fault status
Status
B1407 — Driver window closing circuit fault: the control module detected an abnormal or missing signal while commanding the driver window to close; action required to inspect switch, motor, wiring, and related sensors.
Repair difficulty: Medium
Diagnostic time: 0.5-1.5 hours
Similar codes
Workshop Manuals
Repair manuals for LAND ROVER
3
Land Rover Defender 300Tdi — Workshop Manual (1996 model year)
Workshop ManualLand Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)
Workshop ManualLand Rover Range Rover — Electrical Library (LRL 0453ENG, 2002)
Workshop ManualYour experience will help others
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Code
B1407
MITSUBISHI
B — Body
FR impact sensor low voltage
Views:
UK: 9
EN: 15
RU: 12
AI status
Completed
Completed
100%
Causes
- Blown fuse or relays for power windows
- Faulty driver window switch (stuck, intermittent contacts)
- Failed window motor or worn brushes
- Damaged wiring harness, broken wire or corroded connector in driver door harness (including pinched wires in the hinge area)
- Faulty body control module / window control module
- Water ingress or corrosion at connectors or in the switch assembly
Symptoms
- Driver window will not close when commanded or stops before full close
- Window moves slowly or intermittently in the close direction
- Window reverses or opens unexpectedly when closing (anti-pinch behavior)
- Stored B1407 fault and possibly related body control messages or warnings
- Noise from motor or grinding when attempting to close
What to check
- Retrieve and record all stored codes with a compatible scan tool, note freeze frame or live data during an operation
- Visually inspect fuses and relays for power window circuits; check fuse continuity
- Inspect driver door wiring harness, especially through the door hinge boot, for chafing, broken wires or corrosion
- Check connectors at the switch, motor/regulator and control module for corrosion, bent pins or poor mating
- Operate the driver window while observing connector terminals for voltage changes and secure connections
- Listen for motor noise and feel for regulator movement; check for mechanical obstruction by moving the glass manually with power off (carefully)
Signal parameters
- Battery voltage at rest: ~12.0–12.8 V; running ~13.5–14.5 V. Supply to motor when commanded should be near battery voltage.
- Switch command signal: when switch is pressed for close/open the control input should change state (0 V to ~battery voltage or ground) — varies by vehicle architecture.
- Motor supply under no-load run: typically draws 2–10 A; under load or stall current may exceed 15–30 A depending on motor. A sustained stall current is abnormal.
- Position/limit sensor (if equipped) or anti-pinch feedback: typically a discrete state (open/closed) or resistance/voltage that changes at end-of-travel. Compare to factory values.
Diagnostic algorithm
- Safety first — ensure ignition and power window operation is safe; support glass to prevent dropping during tests.
- Scan for codes: read B1407 and any related codes. Clear codes and attempt to reproduce to verify persistence.
- Check fuses/relays: verify continuity and that power is present at the window motor feed with ignition ON and while attempting to close the window.
- Operate the switch while measuring voltage at the motor connector: verify motor supply polarity and voltage when close command given. If no voltage, trace back to switch and control module.
- Inspect and wiggle the door harness in the hinge area while operating the switch to reveal intermittent wiring faults.
- Test the driver window switch: measure switch outputs or substitute a known-good switch if available.
- Bench test the motor by applying 12 V directly to the motor terminals (observe polarity for direction). If motor does not run or runs weakly/roughly, replace motor.
- Measure motor current while operating. Excessive current can indicate regulator binding or a failing motor. If current is excessive, inspect/regreplace regulator or free the glass tracks.
- Check ground integrity: measure voltage drop between motor ground and battery negative while operating; excessive drop indicates bad ground.
- Inspect anti-pinch/limit sensor inputs (if equipped) and verify correct operation or continuity. Replace sensor/module if faulty.
- If wiring and components test good but control signals from the body/window module are absent or erratic, test module outputs and inputs per factory procedure and consider module repair or replacement.
- After repairs, clear codes and perform several full up/down cycles to confirm normal operation and no fault reoccurrence.
Likely causes
- Intermittent or failed driver window switch
- Corroded connector or damaged wiring in door harness (common at hinge boot)
- Window motor starting to fail (high current draw or intermittent operation)
- Mechanical regulator binding causing excessive motor load
Fault status
Status
B1407 — Driver window closing circuit fault: the control module detected an abnormal or missing signal while commanding the driver window to close; action required to inspect switch, motor, wiring, and related sensors.
Repair difficulty: Medium
Diagnostic time: 0.5-1.5 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
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Code
B1407
Other
B — Body
Driver Power Window Up Circuit Open
Views:
UK: 15
EN: 25
RU: 29
AI status
Completed
Completed
100%
Causes
- Blown fuse or relays for power windows
- Faulty driver window switch (stuck, intermittent contacts)
- Failed window motor or worn brushes
- Damaged wiring harness, broken wire or corroded connector in driver door harness (including pinched wires in the hinge area)
- Faulty body control module / window control module
- Water ingress or corrosion at connectors or in the switch assembly
Symptoms
- Driver window will not close when commanded or stops before full close
- Window moves slowly or intermittently in the close direction
- Window reverses or opens unexpectedly when closing (anti-pinch behavior)
- Stored B1407 fault and possibly related body control messages or warnings
- Noise from motor or grinding when attempting to close
What to check
- Retrieve and record all stored codes with a compatible scan tool, note freeze frame or live data during an operation
- Visually inspect fuses and relays for power window circuits; check fuse continuity
- Inspect driver door wiring harness, especially through the door hinge boot, for chafing, broken wires or corrosion
- Check connectors at the switch, motor/regulator and control module for corrosion, bent pins or poor mating
- Operate the driver window while observing connector terminals for voltage changes and secure connections
- Listen for motor noise and feel for regulator movement; check for mechanical obstruction by moving the glass manually with power off (carefully)
Signal parameters
- Battery voltage at rest: ~12.0–12.8 V; running ~13.5–14.5 V. Supply to motor when commanded should be near battery voltage.
- Switch command signal: when switch is pressed for close/open the control input should change state (0 V to ~battery voltage or ground) — varies by vehicle architecture.
- Motor supply under no-load run: typically draws 2–10 A; under load or stall current may exceed 15–30 A depending on motor. A sustained stall current is abnormal.
- Position/limit sensor (if equipped) or anti-pinch feedback: typically a discrete state (open/closed) or resistance/voltage that changes at end-of-travel. Compare to factory values.
Diagnostic algorithm
- Safety first — ensure ignition and power window operation is safe; support glass to prevent dropping during tests.
- Scan for codes: read B1407 and any related codes. Clear codes and attempt to reproduce to verify persistence.
- Check fuses/relays: verify continuity and that power is present at the window motor feed with ignition ON and while attempting to close the window.
- Operate the switch while measuring voltage at the motor connector: verify motor supply polarity and voltage when close command given. If no voltage, trace back to switch and control module.
- Inspect and wiggle the door harness in the hinge area while operating the switch to reveal intermittent wiring faults.
- Test the driver window switch: measure switch outputs or substitute a known-good switch if available.
- Bench test the motor by applying 12 V directly to the motor terminals (observe polarity for direction). If motor does not run or runs weakly/roughly, replace motor.
- Measure motor current while operating. Excessive current can indicate regulator binding or a failing motor. If current is excessive, inspect/regreplace regulator or free the glass tracks.
- Check ground integrity: measure voltage drop between motor ground and battery negative while operating; excessive drop indicates bad ground.
- Inspect anti-pinch/limit sensor inputs (if equipped) and verify correct operation or continuity. Replace sensor/module if faulty.
- If wiring and components test good but control signals from the body/window module are absent or erratic, test module outputs and inputs per factory procedure and consider module repair or replacement.
- After repairs, clear codes and perform several full up/down cycles to confirm normal operation and no fault reoccurrence.
Likely causes
- Intermittent or failed driver window switch
- Corroded connector or damaged wiring in door harness (common at hinge boot)
- Window motor starting to fail (high current draw or intermittent operation)
- Mechanical regulator binding causing excessive motor load
Fault status
Status
B1407 — Driver window closing circuit fault: the control module detected an abnormal or missing signal while commanding the driver window to close; action required to inspect switch, motor, wiring, and related sensors.
Repair difficulty: Medium
Diagnostic time: 0.5-1.5 hours
Similar codes
Workshop Manuals
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2
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Land Rover Defender 300Tdi — Workshop Manual (1996 model year)
Workshop ManualLand Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)
Workshop ManualLand Rover Range Rover — Electrical Library (LRL 0453ENG, 2002)
Workshop ManualYour experience will help others
+100 karma for a short comment :)
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