Lincoln Nautilus Manuals

Lincoln Nautilus: Exterior Lighting / Reversing Lamps. Diagnosis and Testing

Lincoln Nautilus 2018-2023 Service Manual / Electrical / Lighting / Exterior Lighting / Reversing Lamps. Diagnosis and Testing

DTC Charts

DTC Chart: BCM

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).

  DTC Description Action
B1277:11 Reverse Lamp: Circuit Short To Ground   GO to Pinpoint Test A
B1277:15 Reverse Lamp: Circuit Short To Battery or Open
  • If the reversing lamps are is inoperative, GO to Pinpoint Test A
  • If the reversing lamps are always on, GO to Pinpoint Test B
U1000:00 Solid State Driver Protection Active -Driver Disabled: No Sub Type Information The module has temporarily disabled an output because an excessive current draw exists (such as a short to ground). The BCM cannot enable the output until the cause of the short is corrected. ADDRESS all other Diagnostic Trouble Codes (DTCs) first. After the cause of the concern is corrected, CLEAR the Diagnostic Trouble Codes (DTCs). REPEAT the self-test. For additional information on BCM Field Effect Transistor (FET) protection,
REFER to: Module Controlled Functions - System Operation and Component Description (419-10 Multifunction Electronic Modules, Description and Operation).
U3000:49 Control Module: Internal Electronic Failure The module has permanently disabled an output because an excessive current draw fault (such as a short to ground) has exceeded the limits that the BCM can withstand. The cause of the excessive current draw MUST be corrected before a new BCM is installed. ADDRESS all other Diagnostic Trouble Codes (DTCs) first. After the cause of the concern is corrected, INSTALL a new BCM. Refer to the appropriate Removal and Installation procedure in Section 419-10. For additional information on BCM Field Effect Transistor (FET) protection,
REFER to: Module Controlled Functions - System Operation and Component Description (419-10 Multifunction Electronic Modules, Description and Operation).
For other BCM Diagnostic Trouble Codes (DTCs) -  
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Diagnosis and Testing).

Symptom Charts

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).

Symptom Chart: Reversing Lamps


Condition Possible Sources Actions
A module does not respond to the diagnostic scan tool
  • Fuse
  • Wiring, terminals or connectors
  • Module
 
One or both reversing lamps are inoperative Refer to the Pinpoint Test   GO to Pinpoint Test A
The reversing lamps are on continuously Refer to the Pinpoint Test   GO to Pinpoint Test B

Pinpoint Tests


PINPOINT TEST A: ONE OR BOTH REVERSING LAMPS ARE INOPERATIVE

Refer to Wiring Diagrams Cell 93 for schematic and connector information.

Normal Operation and Fault Conditions

REFER to: Exterior Lighting - Overview (417-01 Exterior Lighting, Description and Operation).
REFER to: Exterior Lighting - System Operation and Component Description (417-01 Exterior Lighting, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
BCM B1277:11 Reverse Lamp: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the reversing lamps output circuit.
BCM B1277:15 Reverse Lamp: Circuit Short To Battery Or Open A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the reversing lamps output circuit.
BCM U1000:00 Solid State Driver Protection Active -Driver Disabled: No Sub Type Information This DTC sets when the BCM has temporarily shut down the output driver. The module has temporarily disabled an output because an excessive current draw exists (such as a short to ground). The BCM cannot enable the output until the cause of the short is corrected, the Diagnostic Trouble Codes (DTCs) have been cleared and a successful self-test is run. For additional information on BCM Field Effect Transistor (FET) protection,
REFER to: Module Controlled Functions - System Operation and Component Description (419-10 Multifunction Electronic Modules, Description and Operation).
BCM U3000:49 Control Module: Internal Electronic Failure This DTC sets when the BCM has permanently shut down the output driver. The module has permanently disabled an output because an excessive current draw fault (such as a short to ground) has exceeded the limits that the BCM can withstand. CORRECT the cause of the excessive current draw before installing a new BCM . For additional information on BCM Field Effect Transistor (FET) protection,
REFER to: Module Controlled Functions - System Operation and Component Description (419-10 Multifunction Electronic Modules, Description and Operation).

Possible Sources

  • Wiring, terminals or connectors
  • Gear range concern
  • Reversing lamp assembly
  • BCM

Visual Inspection and Pre-checks

  • Inspect the bulbs and make sure they are OK.
A1 CHECK THE PCM (POWERTRAIN CONTROL MODULE) TRANSMISSION RANGE PID (PARAMETER IDENTIFICATION)
  • Apply the parking brake.
  • Ignition ON.
  • Using a diagnostic scan tool, view PCM Parameter Identifications (PIDs).
  • Monitor the Transmission Range (TR) PID .
  • Place the gear selector in REVERSE (R).

Does the PID indicate the gear range is in reverse?
Yes GO to A2
No DIAGNOSE the transmission range concern.
REFER to: External Controls (307-05A Automatic Transmission External Controls - 8-Speed Automatic Transmission – 8F57, Diagnosis and Testing).

A2 CHECK FOR VOLTAGE TO THE REVERSING LAMP
  • Ignition OFF.
  • Apply the parking brake.
  • Reversing Lamp C4352.
  • Ignition ON.
  • Place the gear selector in REVERSE (R).
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C4352-1   Ground

Is the voltage greater than 11 volts?
Yes GO to A3
No GO to A4

A3 CHECK THE REVERSING LAMP GROUND CIRCUIT FOR AN OPEN
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C4352-1   C4352-6

Is the voltage greater than 11 volts?
Yes INSTALL a new reversing lamp.
REFER to: Reversing Lamp (417-01 Exterior Lighting, Removal and Installation).
No REPAIR the circuit in question.

A4 REPEAT THE ON-DEMAND SELF-TEST AND CHECK FOR VOLTAGE TO THE REVERSING LAMP
  • Place the gear selector in PARK (P).
  • Using a diagnostic scan tool, perform the BCM self-test.
  • Clear the Diagnostic Trouble Codes (DTCs) and repeat the self-test (required to enable the lamp output driver).
  • Ignition OFF.
  • Ignition ON.
  • Place the gear selector in REVERSE (R).
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C4352-1   Ground

Is the voltage greater than 11 volts?
Yes INSTALL a new reversing lamp.
No GO to A5

A5 CHECK THE REVERSING LAMP VOLTAGE CIRCUIT FOR A SHORT TO GROUND
  • Ignition OFF.
  • Disconnect: BCM C2280F.
  • Disconnect: Reversing Lamp C4352.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C4352-1   Ground

Is the resistance greater than 10,000 ohms?
Yes GO to A6
No REPAIR the in question. After the repair:
If no Diagnostic Trouble Codes (DTCs) are present, TEST the system for normal operation.
If DTC U1000:00 is present, CLEAR the Diagnostic Trouble Codes (DTCs) and REPEAT the self-test (required to enable the lamp output driver if DTC U1000:00 is present).
If DTC U3000:49 is present, INSTALL a new BCM. Refer to the appropriate Removal and Installation procedure in Section 419-10.

A6 CHECK THE REVERSING LAMP VOLTAGE CIRCUIT FOR AN OPEN
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C4352-1   C2280F-11

Is the resistance less than 3 ohms?
Yes GO to A7
No REPAIR the circuit in question.

A7 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION
  • Disconnect and inspect all BCM connectors.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect the BCM connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB , GSB , SSM or FSA . If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new BCM. Refer to the appropriate Removal and Installation procedure in Section 419-10. .
No The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST B: THE REVERSING LAMPS ARE ON CONTINUOUSLY

Refer to Wiring Diagrams Cell 93 for schematic and connector information.

Normal Operation and Fault Conditions

REFER to: Exterior Lighting - Overview (417-01 Exterior Lighting, Description and Operation).
REFER to: Exterior Lighting - System Operation and Component Description (417-01 Exterior Lighting, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
BCM B1277:15 Reverse Lamp: Circuit Short To Battery Or Open A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the reversing lamps output circuit.

Possible Sources

  • Wiring, terminals or connectors
  • Gear range input
  • BCM
B1 CHECK THE PCM (POWERTRAIN CONTROL MODULE) TRANSMISSION RANGE PID (PARAMETER IDENTIFICATION)
  • Apply the parking brake.
  • Ignition ON.
  • Using a diagnostic scan tool, view PCM Parameter Identifications (PIDs).
  • Monitor the Transmission Range (TR) PID .
  • Place the gear selector lever in each position.

Does the PID indicate reverse when the gear selector is not in reverse?
Yes DIAGNOSE the transmission range concern.
REFER to: External Controls (307-05A Automatic Transmission External Controls - 8-Speed Automatic Transmission – 8F57, Diagnosis and Testing).
No GO to B2

B2 CHECK THE REVERSING LAMPS SUPPLY CIRCUIT FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect: BCM C2280F.
  • Ignition ON.

Do the reversing lamps continue to illuminate?
Yes REPAIR the affected circuit.
No GO to B3

B3 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION
  • Disconnect and inspect all BCM connectors.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect the BCM connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB , GSB , SSM or FSA . If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new BCM. Refer to the appropriate Removal and Installation procedure in Section 419-10. .
No The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.


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