Lincoln Corsair Manuals

Lincoln Corsair: Seatbelt Systems / Diagnosis and Testing - Seatbelt Systems

Lincoln Corsair 2020-2025 Service Manual / Body and Paint / Body and Paint / Seatbelt Systems / Diagnosis and Testing - Seatbelt Systems

Symptom Chart(s)

Preliminary Inspection

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices.
REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).

Before diagnosing or repairing the seatbelt system, inspect the following items:

  • Seatbelt webbing integrity (torn, frayed, cut or stretched)
  • Seatbelt buckle and tongue assembly (latching and release, foreign debris)
    REFER to: Seatbelt System Functional Tests (501-20A Seatbelt Systems, General Procedures).

Symptom Chart: Seatbelt System

  Symptom Chart


Condition Action
The seatbelt warning indicator does not operate   GO to Pinpoint Test A
The seatbelt warning chime does not operate   GO to Pinpoint Test B
The seatbelt retractor webbing does not extract or exhibits excessive pressure on the occupant during use   GO to Pinpoint Test C
The seatbelt retractor webbing does not retract or has excessive slack during use   GO to Pinpoint Test C
The Belt-Minder® feature is inoperative   GO to Pinpoint Test D
The seatbelt tongue is rotated on the seatbelt webbing   GO to Pinpoint Test E
The seatbelt webbing is twisted at the seatbelt guide   GO to Pinpoint Test E
The seatbelt webbing is dirty or soiled   GO to Pinpoint Test E

Pinpoint Tests


PINPOINT TEST A: THE SEATBELT WARNING INDICATOR DOES NOT OPERATE

Normal Operation and Fault Conditions

Turn the ignition on and monitor the airbag warning indicator after the IPC proves out.

  • If the airbag warning indicator is illuminated, REFER to: Airbag Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, Diagnosis and Testing).
  • If the airbag warning indicator is not illuminated, REFER to: Instrumentation, Message Center and Warning Chimes (413-01 Instrumentation, Message Center and Warning Chimes) .

Possible Sources

  • Refer to the pinpoint test
Diagnostic steps are not provided for this symptom or DTC.  REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).
PINPOINT TEST B: THE SEATBELT WARNING CHIME DOES NOT OPERATE

Normal Operation and Fault Conditions

Turn the ignition on and monitor the airbag warning indicator after the IPC proves out.

  • If the airbag warning indicator is illuminated, REFER to: Airbag Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, Diagnosis and Testing).
  • If the airbag warning indicator is not illuminated, REFER to: Instrumentation, Message Center and Warning Chimes (413-01 Instrumentation, Message Center and Warning Chimes) .

Possible Sources

  • Refer to the pinpoint test
Diagnostic steps are not provided for this symptom or DTC.  REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).
PINPOINT TEST C: SEATBELT RETRACTOR CONCERNS

Normal Operation and Fault Conditions

The seatbelt retractor webbing does not extract or exhibits excessive pressure on the occupant during use

    The seatbelt retractor webbing does not extract or exhibits excessive pressure on the occupant during use

  • If the seatbelt retractor is in web sensing mode, unlock the locked seatbelt retractor. REFER to: Locked Seatbelt Retractor Releasing (501-20A Seatbelt Systems, General Procedures).
  • If the interior trim is not installed correctly, correct the interior trim installation. Refer to section 501-05.
  • If the seatbelt retractor is locked in Automatic Locking Retractor (ALR) mode or is binding internally, REFER to: Seatbelt System Functional Tests (501-20A Seatbelt Systems, General Procedures).
    and carry out the appropriate functional test.

The seatbelt retractor webbing does not retract or has excessive slack during use

    The seatbelt retractor webbing does not retract or has excessive slack during use

  • If the seatbelt webbing is twisted or incorrectly routed, REFER to: Seatbelt Tongue Rotated On Belt (501-20A Seatbelt Systems, General Procedures).
    or REFER to: Seatbelt Twisted at the Seatbelt Guide (501-20A Seatbelt Systems, General Procedures).
  • If the interior trim is not installed correctly, correct the interior trim installation. Refer to section 501-05.
  • If the seatbelt retractor is binding internally, REFER to: Seatbelt System Functional Tests (501-20A Seatbelt Systems, General Procedures).
    and carry out the appropriate functional test.

Possible Sources

  • Interior trim is not installed correctly
  • Twisted or incorrectly routed seatbelt webbing
  • Seatbelt retractor is in web sensing mode
  • Seatbelt retractor is in Automatic Locking Retractor (ALR) mode (if equipped)
  • Seatbelt retractor binding internally
Diagnostic steps are not provided for this symptom or DTC.  REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).
PINPOINT TEST D: BELT-MINDER® CONCERNS

Normal Operation and Fault Conditions

Using the diagnostic scan tool, verify the Belt-Minder® feature is activated.

  • If the Belt-Minder® isn't activated, activate the Belt-Minder® feature using the diagnostic scan tool or REFER to: Seatbelt Minder Deactivating/Activating (413-01 Instrumentation, Message Center and Warning Chimes, General Procedures).
    .
  • If the Belt-Minder® feature is activated, REFER to: Instrumentation, Message Center and Warning Chimes (413-01 Instrumentation, Message Center and Warning Chimes) .

Possible Sources

  • Refer to the pinpoint test
Diagnostic steps are not provided for this symptom or DTC.  REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).
PINPOINT TEST E: SEATBELT WEBBING CONCERNS

Normal Operation and Fault Conditions

The seatbelt tongue is rotated on the seatbelt webbing

    The seatbelt tongue is rotated on the seatbelt webbing

  • REFER to: Seatbelt Tongue Rotated On Belt (501-20A Seatbelt Systems, General Procedures).

The seatbelt webbing is twisted at the seatbelt guide

    The seatbelt webbing is twisted at the seatbelt guide

  • REFER to: Seatbelt Twisted at the Seatbelt Guide (501-20A Seatbelt Systems, General Procedures).

The seatbelt webbing is dirty or soiled

    The seatbelt webbing is dirty or soiled

  • REFER to: Seatbelt Cleaning (501-20A Seatbelt Systems, General Procedures).

Possible Sources

  • Twisted or incorrectly routed seatbelt webbing
  • Dirty or soiled seatbelt webbing
Diagnostic steps are not provided for this symptom or DTC.  REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).

    Description and Operation - Seatbelt Systems - System Operation and Component Description

    System Operation Emergency Locking Retractor (ELR) All retractors have an Emergency Locking Retractor (ELR) mode, which is a vehicle-sensitive feature designed to activate and lock the seatbelt webbing during hard braking, cornering, or an impact of approximately 24 km/h (15 mph)...

    General Procedures - Locked Seatbelt Retractor Releasing

    Repair NOTE: If the seatbelt webbing does not extract from the seatbelt retractor from the stowed position, this may be due to a normal condition which happens when the seatbelt retracts at a high rate of speed...

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