Code
B1330
ALFA ROMEO
B — Body
Front passenger-side door open switch short to ground
Views:
UK: 19
EN: 23
RU: 28
AI status
Completed
Completed
100%
Causes
- Damaged/chafed wiring in door hinge or harness (pinched when door opens)
- Corroded or contaminated door switch or connector
- Failed/passenger door latch/switch assembly
- Water ingress or short from moisture in the door or connector
- Faulty BCM/input driver (less common)
- Poor repair or aftermarket accessory wiring tied into the circuit
Symptoms
- Permanent door-ajar warning for front passenger door
- Interior/courtesy lights staying on or not turning off
- Continuous key-in-ignition or chime for that door
- Battery drain if lights remain on
- Central locking or alarm logic may behave incorrectly for that door
What to check
- Read stored DTCs and freeze frame with a diagnostic scanner; confirm B1330 is current or historic
- Visually inspect door harness, boots, and connectors for damage, corrosion, or water ingress (focus on door hinge/boot area)
- With ignition on, monitor the door switch input live data while opening/closing the passenger door
- Disconnect the passenger door connector and check if the fault clears (helps isolate door vs. body side wiring/BCM)
- Perform resistance/continuity check from switch pin to ground and from switch pin to BCM pin per wiring diagram
- Wiggle test wiring through full door travel while watching live data for intermittent shorts
Signal parameters
- Typical body input uses a pull-up to the BCM (approx. 5 V) when switch is open
- Expected signal: door closed = ~5 V (open circuit to ground); door open = ~0 V (switch grounded)
- Short-to-ground condition: voltage stuck near 0 V regardless of door position
- Resistance: closed switch (grounded) ≈
Diagnostic algorithm
- Retrieve DTC and live data; note whether code is current or intermittent.
- Visually inspect passenger door harness, rubber boot, connectors, and latch for obvious damage or corrosion.
- With ignition ON, monitor door switch voltage at the passenger door connector. Operate the door; check that voltage transitions between ~5 V (open) and ~0 V (closed).
- If voltage is ~0 V constantly, disconnect the door connector at the body. If the code clears and voltage at BCM side returns to ~5 V, fault is in door wiring/switch. If it stays low, suspect body harness or BCM.
- Perform continuity/resistance checks: between switch terminal and ground with switch actuated; between switch terminal and BCM input pin. Look for shorts to ground or low resistance where there should be open.
- Inspect and repair any damaged wiring in the door boot/harness. Replace corroded connector pins or the door latch/switch assembly if faulty.
- After repair, clear codes and confirm proper operation through multiple open/close cycles and a final scan to ensure B1330 does not return.
- If wiring and switch check good and fault persists, follow manufacturer procedure to test/replace BCM or consult wiring diagrams for further module input driver testing.
Likely causes
- Wiring short to vehicle ground at door hinge area
- Failed door-open microswitch inside the latch assembly
- Corroded/loose connector at the door harness or body harness splice
- Water intrusion causing a short across switch terminals
Fault status
Status
B1330 — Front passenger-side door open switch circuit shorted to ground detected by body control module.
Repair difficulty: Medium
Diagnostic time: 0.5-1.5 hours
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Code
B1330
FIAT
B — Body
Front passenger-side door open switch short to ground
Views:
UK: 14
EN: 21
RU: 23
AI status
Completed
Completed
100%
Causes
- Damaged/chafed wiring in door hinge or harness (pinched when door opens)
- Corroded or contaminated door switch or connector
- Failed/passenger door latch/switch assembly
- Water ingress or short from moisture in the door or connector
- Faulty BCM/input driver (less common)
- Poor repair or aftermarket accessory wiring tied into the circuit
Symptoms
- Permanent door-ajar warning for front passenger door
- Interior/courtesy lights staying on or not turning off
- Continuous key-in-ignition or chime for that door
- Battery drain if lights remain on
- Central locking or alarm logic may behave incorrectly for that door
What to check
- Read stored DTCs and freeze frame with a diagnostic scanner; confirm B1330 is current or historic
- Visually inspect door harness, boots, and connectors for damage, corrosion, or water ingress (focus on door hinge/boot area)
- With ignition on, monitor the door switch input live data while opening/closing the passenger door
- Disconnect the passenger door connector and check if the fault clears (helps isolate door vs. body side wiring/BCM)
- Perform resistance/continuity check from switch pin to ground and from switch pin to BCM pin per wiring diagram
- Wiggle test wiring through full door travel while watching live data for intermittent shorts
Signal parameters
- Typical body input uses a pull-up to the BCM (approx. 5 V) when switch is open
- Expected signal: door closed = ~5 V (open circuit to ground); door open = ~0 V (switch grounded)
- Short-to-ground condition: voltage stuck near 0 V regardless of door position
- Resistance: closed switch (grounded) ≈
Diagnostic algorithm
- Retrieve DTC and live data; note whether code is current or intermittent.
- Visually inspect passenger door harness, rubber boot, connectors, and latch for obvious damage or corrosion.
- With ignition ON, monitor door switch voltage at the passenger door connector. Operate the door; check that voltage transitions between ~5 V (open) and ~0 V (closed).
- If voltage is ~0 V constantly, disconnect the door connector at the body. If the code clears and voltage at BCM side returns to ~5 V, fault is in door wiring/switch. If it stays low, suspect body harness or BCM.
- Perform continuity/resistance checks: between switch terminal and ground with switch actuated; between switch terminal and BCM input pin. Look for shorts to ground or low resistance where there should be open.
- Inspect and repair any damaged wiring in the door boot/harness. Replace corroded connector pins or the door latch/switch assembly if faulty.
- After repair, clear codes and confirm proper operation through multiple open/close cycles and a final scan to ensure B1330 does not return.
- If wiring and switch check good and fault persists, follow manufacturer procedure to test/replace BCM or consult wiring diagrams for further module input driver testing.
Likely causes
- Wiring short to vehicle ground at door hinge area
- Failed door-open microswitch inside the latch assembly
- Corroded/loose connector at the door harness or body harness splice
- Water intrusion causing a short across switch terminals
Fault status
Status
B1330 — Front passenger-side door open switch circuit shorted to ground detected by body control module.
Repair difficulty: Medium
Diagnostic time: 0.5-1.5 hours
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Code
B1330
HUMMER
B — Body
Left A/C Discharge Sensor Fault
Views:
UK: 15
EN: 25
RU: 30
AI status
Completed
Completed
100%
Causes
- Damaged/chafed wiring in door hinge or harness (pinched when door opens)
- Corroded or contaminated door switch or connector
- Failed/passenger door latch/switch assembly
- Water ingress or short from moisture in the door or connector
- Faulty BCM/input driver (less common)
- Poor repair or aftermarket accessory wiring tied into the circuit
Symptoms
- Permanent door-ajar warning for front passenger door
- Interior/courtesy lights staying on or not turning off
- Continuous key-in-ignition or chime for that door
- Battery drain if lights remain on
- Central locking or alarm logic may behave incorrectly for that door
What to check
- Read stored DTCs and freeze frame with a diagnostic scanner; confirm B1330 is current or historic
- Visually inspect door harness, boots, and connectors for damage, corrosion, or water ingress (focus on door hinge/boot area)
- With ignition on, monitor the door switch input live data while opening/closing the passenger door
- Disconnect the passenger door connector and check if the fault clears (helps isolate door vs. body side wiring/BCM)
- Perform resistance/continuity check from switch pin to ground and from switch pin to BCM pin per wiring diagram
- Wiggle test wiring through full door travel while watching live data for intermittent shorts
Signal parameters
- Typical body input uses a pull-up to the BCM (approx. 5 V) when switch is open
- Expected signal: door closed = ~5 V (open circuit to ground); door open = ~0 V (switch grounded)
- Short-to-ground condition: voltage stuck near 0 V regardless of door position
- Resistance: closed switch (grounded) ≈
Diagnostic algorithm
- Retrieve DTC and live data; note whether code is current or intermittent.
- Visually inspect passenger door harness, rubber boot, connectors, and latch for obvious damage or corrosion.
- With ignition ON, monitor door switch voltage at the passenger door connector. Operate the door; check that voltage transitions between ~5 V (open) and ~0 V (closed).
- If voltage is ~0 V constantly, disconnect the door connector at the body. If the code clears and voltage at BCM side returns to ~5 V, fault is in door wiring/switch. If it stays low, suspect body harness or BCM.
- Perform continuity/resistance checks: between switch terminal and ground with switch actuated; between switch terminal and BCM input pin. Look for shorts to ground or low resistance where there should be open.
- Inspect and repair any damaged wiring in the door boot/harness. Replace corroded connector pins or the door latch/switch assembly if faulty.
- After repair, clear codes and confirm proper operation through multiple open/close cycles and a final scan to ensure B1330 does not return.
- If wiring and switch check good and fault persists, follow manufacturer procedure to test/replace BCM or consult wiring diagrams for further module input driver testing.
Likely causes
- Wiring short to vehicle ground at door hinge area
- Failed door-open microswitch inside the latch assembly
- Corroded/loose connector at the door harness or body harness splice
- Water intrusion causing a short across switch terminals
Fault status
Status
B1330 — Front passenger-side door open switch circuit shorted to ground detected by body control module.
Repair difficulty: Medium
Diagnostic time: 0.5-1.5 hours
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Code
B1330
Other
B — Body
Passenger Door Ajar Circuit Short To Ground
Views:
UK: 21
EN: 33
RU: 40
AI status
Completed
Completed
100%
Causes
- Damaged/chafed wiring in door hinge or harness (pinched when door opens)
- Corroded or contaminated door switch or connector
- Failed/passenger door latch/switch assembly
- Water ingress or short from moisture in the door or connector
- Faulty BCM/input driver (less common)
- Poor repair or aftermarket accessory wiring tied into the circuit
Symptoms
- Permanent door-ajar warning for front passenger door
- Interior/courtesy lights staying on or not turning off
- Continuous key-in-ignition or chime for that door
- Battery drain if lights remain on
- Central locking or alarm logic may behave incorrectly for that door
What to check
- Read stored DTCs and freeze frame with a diagnostic scanner; confirm B1330 is current or historic
- Visually inspect door harness, boots, and connectors for damage, corrosion, or water ingress (focus on door hinge/boot area)
- With ignition on, monitor the door switch input live data while opening/closing the passenger door
- Disconnect the passenger door connector and check if the fault clears (helps isolate door vs. body side wiring/BCM)
- Perform resistance/continuity check from switch pin to ground and from switch pin to BCM pin per wiring diagram
- Wiggle test wiring through full door travel while watching live data for intermittent shorts
Signal parameters
- Typical body input uses a pull-up to the BCM (approx. 5 V) when switch is open
- Expected signal: door closed = ~5 V (open circuit to ground); door open = ~0 V (switch grounded)
- Short-to-ground condition: voltage stuck near 0 V regardless of door position
- Resistance: closed switch (grounded) ≈
Diagnostic algorithm
- Retrieve DTC and live data; note whether code is current or intermittent.
- Visually inspect passenger door harness, rubber boot, connectors, and latch for obvious damage or corrosion.
- With ignition ON, monitor door switch voltage at the passenger door connector. Operate the door; check that voltage transitions between ~5 V (open) and ~0 V (closed).
- If voltage is ~0 V constantly, disconnect the door connector at the body. If the code clears and voltage at BCM side returns to ~5 V, fault is in door wiring/switch. If it stays low, suspect body harness or BCM.
- Perform continuity/resistance checks: between switch terminal and ground with switch actuated; between switch terminal and BCM input pin. Look for shorts to ground or low resistance where there should be open.
- Inspect and repair any damaged wiring in the door boot/harness. Replace corroded connector pins or the door latch/switch assembly if faulty.
- After repair, clear codes and confirm proper operation through multiple open/close cycles and a final scan to ensure B1330 does not return.
- If wiring and switch check good and fault persists, follow manufacturer procedure to test/replace BCM or consult wiring diagrams for further module input driver testing.
Likely causes
- Wiring short to vehicle ground at door hinge area
- Failed door-open microswitch inside the latch assembly
- Corroded/loose connector at the door harness or body harness splice
- Water intrusion causing a short across switch terminals
Fault status
Status
B1330 — Front passenger-side door open switch circuit shorted to ground detected by body control module.
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?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email