Toggle Side Panel

Shopping Cart

No products in the basket.

Shopping Cart

No products in the basket.

Close search
Home / DTC / B1323 — Door open warning lamp circuit

B1323 — Door open warning lamp circuit

Detailed page for trouble code B1323.

34,405codes
59brands
11,914generic
22,491specific
All codes P-codes (Powertrain) B-codes (Body) C-codes (Chassis) U-codes (Network/User) Tesla Alerts
Reset
Code

B1323

ALFA ROMEO B — Body

Door open warning lamp circuit

Brand: ALFA ROMEO
Type: B — Body
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Broken, corroded or disconnected wiring or connector in the lamp circuit
  • Faulty door jamb (door ajar) switch or sensor
  • Blown lamp / LED failure in the instrument cluster or lamp assembly
  • Short to battery or short to ground in the lamp wiring
  • Poor ground connection at instrument cluster or body control module
  • Intermittent CAN/communication fault between body module and instrument cluster (if signal is sent via bus)

Symptoms

  • Door-ajar / Door open warning lamp illuminated permanently or intermittently
  • Warning lamp stays on even when doors are closed
  • Warning not illuminated when a door is open
  • Possible stored B1323 diagnostic trouble code in body control module
  • Occasional erratic behavior of other related body functions if wiring is compromised

What to check

  • Confirm code with a capable scan tool and note freeze-frame / occurrence pattern
  • Visually inspect wiring and connectors at the affected door hinge, door switch, instrument cluster and BCM for damage, corrosion and loose pins
  • Operate each door while observing the lamp and scanning live data for door switch status
  • Check lamp/LED continuity and operation at the cluster or dash lamp connector
  • Verify good ground at cluster/BCM (measure voltage drop to battery negative while operating switch)
  • Perform wiggle tests on harness while monitoring live data for intermittent faults

Signal parameters

  • Supply voltage to lamp circuit: approximately battery voltage (11–14.5 V) with ignition on
  • Door switch closed (door closed) continuity: near 0 Ω between switch terminals (if mechanical switch)
  • Door switch open (door open) continuity: open / high resistance
  • Signal line voltage to BCM/cluster: typically pulled to ground or Vb depending on sensor type; observe change when door operated
  • Ground resistance at cluster/BCM: low (
  • Lamp current draw: small (mA range) for LED lamps; incandescent lamps higher (tens to hundreds of mA)

Diagnostic algorithm

  1. Connect a diagnostic scanner, read and record B1323 and any other related codes; clear codes and attempt to reproduce.
  2. With ignition on, monitor live data for door switch/door ajar status while operating each door to identify which door input is reporting incorrectly.
  3. Visually inspect connectors and wiring at the door hinge, door switch, door latch, instrument cluster and BCM for damage, corrosion, or loose pins. Repair as required.
  4. Check the door switch: disconnect connector and measure continuity while actuating the switch. Replace switch if contacts are incorrect or intermittent.
  5. Check supply and ground at the lamp/cluster connector: measure battery voltage at the power pin and verify solid ground. Repair poor connections or grounds.
  6. If the lamp is externally serviceable, verify lamp/LED operation by applying bench power or swapping a known-good lamp. Replace if faulty.
  7. Perform continuity and short checks: with battery disconnected, measure continuity between lamp/cluster pins and BCM pins; check for short to chassis ground or battery positive where not expected.
  8. If the door status is communicated via CAN or LIN, inspect bus for errors and verify BCM to cluster communication. Address any network faults before replacing modules.
  9. After repairs, clear codes and retest system through multiple open/close cycles and a short road test to confirm the issue is resolved.
  10. If all wiring, switches and lamps check good and the fault persists, consider replacement or bench testing of the BCM or instrument cluster per manufacturer procedures.

Likely causes

  • Open or corroded connector at door switch or lamp harness
  • Failed door switch (sticking or intermittent contacts)
  • Damaged wiring from door to body control module (pinch point at hinge)
  • Failed lamp/LED in cluster (especially on vehicles with non-serviceable clusters)

Fault status

⚠️ Status
Door open (door-ajar) warning lamp circuit fault detected
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2 hours

Similar codes

B1320 B1321 B1322 B1324 B1325
89

Browse 89 ALFA ROMEO manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

ALFA ROMEO

Your experience will help others
+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email
Code

B1323

FIAT B — Body

Door open warning lamp circuit

Brand: FIAT
Type: B — Body
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Broken, corroded or disconnected wiring or connector in the lamp circuit
  • Faulty door jamb (door ajar) switch or sensor
  • Blown lamp / LED failure in the instrument cluster or lamp assembly
  • Short to battery or short to ground in the lamp wiring
  • Poor ground connection at instrument cluster or body control module
  • Intermittent CAN/communication fault between body module and instrument cluster (if signal is sent via bus)

Symptoms

  • Door-ajar / Door open warning lamp illuminated permanently or intermittently
  • Warning lamp stays on even when doors are closed
  • Warning not illuminated when a door is open
  • Possible stored B1323 diagnostic trouble code in body control module
  • Occasional erratic behavior of other related body functions if wiring is compromised

What to check

  • Confirm code with a capable scan tool and note freeze-frame / occurrence pattern
  • Visually inspect wiring and connectors at the affected door hinge, door switch, instrument cluster and BCM for damage, corrosion and loose pins
  • Operate each door while observing the lamp and scanning live data for door switch status
  • Check lamp/LED continuity and operation at the cluster or dash lamp connector
  • Verify good ground at cluster/BCM (measure voltage drop to battery negative while operating switch)
  • Perform wiggle tests on harness while monitoring live data for intermittent faults

Signal parameters

  • Supply voltage to lamp circuit: approximately battery voltage (11–14.5 V) with ignition on
  • Door switch closed (door closed) continuity: near 0 Ω between switch terminals (if mechanical switch)
  • Door switch open (door open) continuity: open / high resistance
  • Signal line voltage to BCM/cluster: typically pulled to ground or Vb depending on sensor type; observe change when door operated
  • Ground resistance at cluster/BCM: low (
  • Lamp current draw: small (mA range) for LED lamps; incandescent lamps higher (tens to hundreds of mA)

Diagnostic algorithm

  1. Connect a diagnostic scanner, read and record B1323 and any other related codes; clear codes and attempt to reproduce.
  2. With ignition on, monitor live data for door switch/door ajar status while operating each door to identify which door input is reporting incorrectly.
  3. Visually inspect connectors and wiring at the door hinge, door switch, door latch, instrument cluster and BCM for damage, corrosion, or loose pins. Repair as required.
  4. Check the door switch: disconnect connector and measure continuity while actuating the switch. Replace switch if contacts are incorrect or intermittent.
  5. Check supply and ground at the lamp/cluster connector: measure battery voltage at the power pin and verify solid ground. Repair poor connections or grounds.
  6. If the lamp is externally serviceable, verify lamp/LED operation by applying bench power or swapping a known-good lamp. Replace if faulty.
  7. Perform continuity and short checks: with battery disconnected, measure continuity between lamp/cluster pins and BCM pins; check for short to chassis ground or battery positive where not expected.
  8. If the door status is communicated via CAN or LIN, inspect bus for errors and verify BCM to cluster communication. Address any network faults before replacing modules.
  9. After repairs, clear codes and retest system through multiple open/close cycles and a short road test to confirm the issue is resolved.
  10. If all wiring, switches and lamps check good and the fault persists, consider replacement or bench testing of the BCM or instrument cluster per manufacturer procedures.

Likely causes

  • Open or corroded connector at door switch or lamp harness
  • Failed door switch (sticking or intermittent contacts)
  • Damaged wiring from door to body control module (pinch point at hinge)
  • Failed lamp/LED in cluster (especially on vehicles with non-serviceable clusters)

Fault status

⚠️ Status
Door open (door-ajar) warning lamp circuit fault detected
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2 hours

Similar codes

B1320 B1321 B1322 B1324 B1325
Repair manuals

Manual library for FIAT

26

Browse 26 FIAT manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

FIAT

Your experience will help others
+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email
Code

B1323

MITSUBISHI B — Body

IG1 SW input

Brand: MITSUBISHI
Type: B — Body
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Broken, corroded or disconnected wiring or connector in the lamp circuit
  • Faulty door jamb (door ajar) switch or sensor
  • Blown lamp / LED failure in the instrument cluster or lamp assembly
  • Short to battery or short to ground in the lamp wiring
  • Poor ground connection at instrument cluster or body control module
  • Intermittent CAN/communication fault between body module and instrument cluster (if signal is sent via bus)

Symptoms

  • Door-ajar / Door open warning lamp illuminated permanently or intermittently
  • Warning lamp stays on even when doors are closed
  • Warning not illuminated when a door is open
  • Possible stored B1323 diagnostic trouble code in body control module
  • Occasional erratic behavior of other related body functions if wiring is compromised

What to check

  • Confirm code with a capable scan tool and note freeze-frame / occurrence pattern
  • Visually inspect wiring and connectors at the affected door hinge, door switch, instrument cluster and BCM for damage, corrosion and loose pins
  • Operate each door while observing the lamp and scanning live data for door switch status
  • Check lamp/LED continuity and operation at the cluster or dash lamp connector
  • Verify good ground at cluster/BCM (measure voltage drop to battery negative while operating switch)
  • Perform wiggle tests on harness while monitoring live data for intermittent faults

Signal parameters

  • Supply voltage to lamp circuit: approximately battery voltage (11–14.5 V) with ignition on
  • Door switch closed (door closed) continuity: near 0 Ω between switch terminals (if mechanical switch)
  • Door switch open (door open) continuity: open / high resistance
  • Signal line voltage to BCM/cluster: typically pulled to ground or Vb depending on sensor type; observe change when door operated
  • Ground resistance at cluster/BCM: low (
  • Lamp current draw: small (mA range) for LED lamps; incandescent lamps higher (tens to hundreds of mA)

Diagnostic algorithm

  1. Connect a diagnostic scanner, read and record B1323 and any other related codes; clear codes and attempt to reproduce.
  2. With ignition on, monitor live data for door switch/door ajar status while operating each door to identify which door input is reporting incorrectly.
  3. Visually inspect connectors and wiring at the door hinge, door switch, door latch, instrument cluster and BCM for damage, corrosion, or loose pins. Repair as required.
  4. Check the door switch: disconnect connector and measure continuity while actuating the switch. Replace switch if contacts are incorrect or intermittent.
  5. Check supply and ground at the lamp/cluster connector: measure battery voltage at the power pin and verify solid ground. Repair poor connections or grounds.
  6. If the lamp is externally serviceable, verify lamp/LED operation by applying bench power or swapping a known-good lamp. Replace if faulty.
  7. Perform continuity and short checks: with battery disconnected, measure continuity between lamp/cluster pins and BCM pins; check for short to chassis ground or battery positive where not expected.
  8. If the door status is communicated via CAN or LIN, inspect bus for errors and verify BCM to cluster communication. Address any network faults before replacing modules.
  9. After repairs, clear codes and retest system through multiple open/close cycles and a short road test to confirm the issue is resolved.
  10. If all wiring, switches and lamps check good and the fault persists, consider replacement or bench testing of the BCM or instrument cluster per manufacturer procedures.

Likely causes

  • Open or corroded connector at door switch or lamp harness
  • Failed door switch (sticking or intermittent contacts)
  • Damaged wiring from door to body control module (pinch point at hinge)
  • Failed lamp/LED in cluster (especially on vehicles with non-serviceable clusters)

Fault status

⚠️ Status
Door open (door-ajar) warning lamp circuit fault detected
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2 hours

Similar codes

B1320 B1321 B1322 B1324 B1325
406

Browse 406 MITSUBISHI manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

MITSUBISHI

Your experience will help others
+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email
Code

B1323

Other B — Body

Door Ajar Lamp Circuit Failure

Brand: Other
Type: B — Body
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Broken, corroded or disconnected wiring or connector in the lamp circuit
  • Faulty door jamb (door ajar) switch or sensor
  • Blown lamp / LED failure in the instrument cluster or lamp assembly
  • Short to battery or short to ground in the lamp wiring
  • Poor ground connection at instrument cluster or body control module
  • Intermittent CAN/communication fault between body module and instrument cluster (if signal is sent via bus)

Symptoms

  • Door-ajar / Door open warning lamp illuminated permanently or intermittently
  • Warning lamp stays on even when doors are closed
  • Warning not illuminated when a door is open
  • Possible stored B1323 diagnostic trouble code in body control module
  • Occasional erratic behavior of other related body functions if wiring is compromised

What to check

  • Confirm code with a capable scan tool and note freeze-frame / occurrence pattern
  • Visually inspect wiring and connectors at the affected door hinge, door switch, instrument cluster and BCM for damage, corrosion and loose pins
  • Operate each door while observing the lamp and scanning live data for door switch status
  • Check lamp/LED continuity and operation at the cluster or dash lamp connector
  • Verify good ground at cluster/BCM (measure voltage drop to battery negative while operating switch)
  • Perform wiggle tests on harness while monitoring live data for intermittent faults

Signal parameters

  • Supply voltage to lamp circuit: approximately battery voltage (11–14.5 V) with ignition on
  • Door switch closed (door closed) continuity: near 0 Ω between switch terminals (if mechanical switch)
  • Door switch open (door open) continuity: open / high resistance
  • Signal line voltage to BCM/cluster: typically pulled to ground or Vb depending on sensor type; observe change when door operated
  • Ground resistance at cluster/BCM: low (
  • Lamp current draw: small (mA range) for LED lamps; incandescent lamps higher (tens to hundreds of mA)

Diagnostic algorithm

  1. Connect a diagnostic scanner, read and record B1323 and any other related codes; clear codes and attempt to reproduce.
  2. With ignition on, monitor live data for door switch/door ajar status while operating each door to identify which door input is reporting incorrectly.
  3. Visually inspect connectors and wiring at the door hinge, door switch, door latch, instrument cluster and BCM for damage, corrosion, or loose pins. Repair as required.
  4. Check the door switch: disconnect connector and measure continuity while actuating the switch. Replace switch if contacts are incorrect or intermittent.
  5. Check supply and ground at the lamp/cluster connector: measure battery voltage at the power pin and verify solid ground. Repair poor connections or grounds.
  6. If the lamp is externally serviceable, verify lamp/LED operation by applying bench power or swapping a known-good lamp. Replace if faulty.
  7. Perform continuity and short checks: with battery disconnected, measure continuity between lamp/cluster pins and BCM pins; check for short to chassis ground or battery positive where not expected.
  8. If the door status is communicated via CAN or LIN, inspect bus for errors and verify BCM to cluster communication. Address any network faults before replacing modules.
  9. After repairs, clear codes and retest system through multiple open/close cycles and a short road test to confirm the issue is resolved.
  10. If all wiring, switches and lamps check good and the fault persists, consider replacement or bench testing of the BCM or instrument cluster per manufacturer procedures.

Likely causes

  • Open or corroded connector at door switch or lamp harness
  • Failed door switch (sticking or intermittent contacts)
  • Damaged wiring from door to body control module (pinch point at hinge)
  • Failed lamp/LED in cluster (especially on vehicles with non-serviceable clusters)

Fault status

⚠️ Status
Door open (door-ajar) warning lamp circuit fault detected
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2 hours

Similar codes

B1320 B1321 B1322 B1324 B1325
9,572

The library contains 9,572 repair and diagnostic manuals. Choose a brand to open the full manual tree by year, model and trim.

ALFA ROMEO
89
AUDI
1,243
BMW
479
CADILLAC
206
CHEVROLET
456
CHRYSLER
193
DAEWOO
75
FIAT
26
GENESIS
207
HUMMER
138
HYUNDAI
371
ISUZU
229
KIA
155
LAND ROVER
320
LEXUS
280
LINCOLN
166
MERCEDES-BENZ
856
MERCURY
296
MITSUBISHI
406
PORSCHE
136
TESLA
58
TOYOTA
2,209
TRIUMPH
131
VOLKSWAGEN
626
VOLVO
221
Your experience will help others
+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email

Report

Harassment or bullying behavior
Contains mature or sensitive content
Contains misleading or false information
Contains abusive or derogatory content
Contains spam, fake content or potential malware

Block Member?

Please confirm you want to block this member.

You will no longer be able to:

  • See blocked member's posts
  • Mention this member in posts
  • Invite this member to groups
  • Message this member
  • Add this member as a connection

Please note: This action will also remove this member from your connections and send a report to the site admin. Please allow a few minutes for this process to complete.

Report

You have already reported this .