Lincoln Nautilus Manuals

Lincoln Nautilus: Ethernet Module Communications Network / Ethernet Module Communications Network. Diagnosis and Testing

Lincoln Nautilus 2018-2024 Service Manual / Electrical / Electrical Distribution / Ethernet Module Communications Network / Ethernet Module Communications Network. Diagnosis and Testing

Diagnostic Trouble Code (DTC) Chart

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).


Module DTC Description Action
APIM U2400:81 Ethernet Failure With Gateway Module A (GWM): Invalid Serial Data Received GO to Pinpoint Test A
APIM U2400:92 Ethernet Failure With Gateway Module A (GWM): Performance Or Incorrect Operation GO to Pinpoint Test A
GWM U2401:00 Ethernet Failure With Accessory Protocol Interface Module (APIM): No Sub Type Information GO to Pinpoint Test B
GWM U2401:81 Ethernet Failure With Accessory Protocol Interface Module (APIM): Invalid Serial Data Received GO to Pinpoint Test A
GWM U2401:92 Ethernet Failure With Accessory Protocol Interface Module (APIM): Performance Or Incorrect Operation GO to Pinpoint Test A
GWM U2402:00 Ethernet Failure With Telematic Control Unit Module (TCU): No Sub Type Information GO to Pinpoint Test B
GWM U2402:81 Ethernet Failure With Telematic Control Unit Module (TCU): Invalid Serial Data Received GO to Pinpoint Test A
GWM U2402:92 Ethernet Failure With Telematic Control Unit Module (TCU): Performance Or Incorrect Operation GO to Pinpoint Test A

Pinpoint Tests


PINPOINT TEST A: ETHERNET NETWORK FAILURE - MULTIPLE DIAGNOSTIC TROUBLE CODES

Refer to Wiring Diagrams Cell 14 for schematic and connector information.

Normal Operation and Fault Conditions

Ethernet Cable Testing At Cable End

To test the Ethernet cable in question at the GWM , the cable must be removed from the GWM master connector to gain access to the connector pins where probing can take place (refer to the illustration above).

The Ethernet cable connector end identification color can be used to identify the module the Ethernet cable is connected to. Refer to the chart in the Description and Operation section for the color assignment. REFER to: Ethernet Module Communications Network - System Operation and Component Description (418-00B Ethernet Module Communications Network, Description and Operation).

To test the Ethernet cable in question at the all other applicable modules, the cable must be removed from the connector housing to gain access to the connector pins where probing can take place. (refer to the illustration above)

Ethernet Cable Testing At Cable In-line Connection

To test the Ethernet cable in question at the in-line connection, the cable must be removed from the connector housing to gain access to the connector pins where probing can take place (refer to the illustration above).

REFER to: Ethernet Module Communications Network - System Operation and Component Description (418-00B Ethernet Module Communications Network, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
GWM U2401:81 Ethernet Failure With Accessory Protocol Interface Module (APIM): Invalid Serial Data Received Sets in the GWM when an invalid data message is received from the APIM and DTC U2401:92 is set.
GWM U2401:92 Ethernet Failure With Accessory Protocol Interface Module (APIM): Performance Or Incorrect Operation Sets in the GWM when an invalid data message is received from the APIM .
GWM U2402:81 Ethernet Failure With Telematic Control Unit Module (TCU): Invalid Serial Data Received Sets in the GWM when an invalid data message is received from the TCU and DTC U2401:92 is set.
GWM U2402:92 Ethernet Failure With Telematic Control Unit Module (TCU): Performance Or Incorrect Operation Sets in the GWM when an invalid data message is received from the TCU .
APIM U2400:81 Ethernet Failure With Gateway Module A (GWM): Invalid Serial Data Received Sets in the APIM when an invalid data message is received from the GWM .
APIM U2400:92 Ethernet Failure With Gateway Module A (GWM): Performance Or Incorrect Operation Sets in the APIM when an invalid data message is received from the GWM .

Possible Sources

  • Wiring, terminals, or connectors
  • TCU
  • APIM
A1 CHECK THE NETWORK COMMUNICATION
  • Using a diagnostic scan tool, carry out the network test.

Does the module in question, APIM , TCU pass the network test?
Yes GO to A2
No
REFER to: Controller Area Network (CAN) Module Communications Network (418-00A Controller Area Network (CAN) Module Communications Network, Diagnosis and Testing).

A2 CHECK FOR DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using a diagnostic scan tool, carry out the self-test for the module in question (APIM , TCU ).

Are any non-Ethernet related Diagnostic Trouble Codes (DTCs) present?
Yes DIAGNOSE all Diagnostic Trouble Codes (DTCs) first. REFER to the Master DTC Chart.
No GO to A3

A3 CHECK THE ETHERNET CIRCUIT FOR A SHORT TO GROUND
  • Ignition OFF.
  • Disconnect the GWM Ethernet cable master connector .
  • NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector. Disconnect the suspect module Ethernet cable from the GWM Ethernet master connector to enable efficient probing. Refer to the instruction at the beginning of this pinpoint test
  • Disconnect the suspect module Ethernet cable connector (APIM , TCU ).
  • NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector. Disassemble the suspect module Ethernet cable connector as shown at the start of this pinpoint test to enable probing of the Ethernet cable. Refer to the instruction at the beginning of this pinpoint test
  • Measure:
    Positive Lead Measurement / Action Negative Lead
    Ethernet cable , pin 1   Ground
    Ethernet cable , pin 2   Ground

Are the resistances greater than 10,000 ohms?
Yes GO to A4
No INSTALL a new Ethernet cable.

A4 CHECK THE ETHERNET CIRCUIT FOR A SHORT TOGETHER
  • Measure:
    Positive Lead Measurement / Action Negative Lead
    Ethernet cable , pin 1 Ethernet cable , pin 2

Is the resistance greater than 10,000 ohms?
Yes GO to A5
No INSTALL a new Ethernet cable.

A5 CHECK THE ETHERNET CIRCUIT FOR A SHORT TO POWER
  • Ignition ON.
  • Measure:
    Positive Lead Measurement / Action Negative Lead
    Ethernet cable, pin 1   Ground
    Ethernet cable, pin 2   Ground

Is any voltage present?
Yes INSTALL a new Ethernet cable.
No GO to A6

A6 CHECK THE ETHERNET CIRCUIT FOR AN OPEN
  • Ignition OFF.
  • Measure:
    Positive Lead Measurement / Action Negative Lead
    Ethernet cable at GWM , pin 1 Ethernet cable at suspect module, pin 1
    Ethernet cable at GWM , pin 2 Ethernet cable at suspect module, pin 2

Are the resistances less than 3 ohms?
Yes GO to A7
No INSTALL a new Ethernet cable.

A7 RECHECK FOR DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using a diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs) for the module in question (APIM , IPC , IPMA , TCU ) setting the DTC .
  • Ignition OFF.
  • Ignition ON.
  • Wait 10 seconds
  • Using a diagnostic scan tool, carry out the self-test for the module in question (APIM , IPC , IPMA , TCU ).

Is the DTC still present?
Yes If the APIM is the suspect module, GO to A8
If the TCU is the suspect module, GO to A9
No The module reset has resolved the concern.

A8 CHECK FOR CORRECT APIM (SYNC MODULE) OPERATION
  • Ignition OFF.
  • Disconnect and inspect the APIM connectors.
  • Repair:
    • Corrosion (clean module pins or install new connectors or terminals)
    • Damaged or bent pins (install new terminals or pins)
    • Pushed-out pins (install new pins as necessary)
  • Reconnect the APIM 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 APIM .
REFER to: SYNC Module [APIM] (415-00 Information and Entertainment System - General Information - Vehicles With: SYNC 4, Removal and Installation).
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.

A9 CHECK FOR CORRECT TCU (TELEMATIC CONTROL UNIT MODULE) OPERATION
  • Ignition OFF.
  • Disconnect and inspect the TCU connectors.
  • Repair:
    • Corrosion (clean module pins or install new connectors or terminals)
    • Damaged or bent pins (install new terminals or pins)
    • Pushed-out pins (install new pins as necessary)
  • Reconnect the TCU 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 TCU ,
REFER to: Telematics Control Unit (TCU) Module (415-00 Information and Entertainment System - General Information - Vehicles With: SYNC 4, Removal and Installation).
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: U2401:00, U2402:00

Refer to Wiring Diagrams Cell 14 for schematic and connector information.

Normal Operation and Fault Conditions

Ethernet Cable Testing At Cable End

To test the Ethernet cable in question at the GWM , the cable must be removed from the GWM master connector to gain access to the connector pins where probing can take place (refer to the illustration above).

The Ethernet cable connector end identification color can be used to identify the module the Ethernet cable is connected to. Refer to the chart in the Description and Operation section for the color assignment. REFER to: Ethernet Module Communications Network - System Operation and Component Description (418-00B Ethernet Module Communications Network, Description and Operation).

To test the Ethernet cable in question at the all other applicable modules, the cable must be removed from the connector housing to gain access to the connector pins where probing can take place. (refer to the illustrations above)

Ethernet Cable Testing At Cable In-line Connection

To test the Ethernet cable in question at the in-line connection, the cable must be removed from the connector housing to gain access to the connector pins where probing can take place (refer to the illustrations above).

REFER to: Ethernet Module Communications Network - System Operation and Component Description (418-00B Ethernet Module Communications Network, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
GWM U2401:00 Ethernet Failure With Accessory Protocol Interface Module (APIM): No Sub Type Information Sets in the GWM when the APIM provisioning data is not received by the GWM within 300 seconds of both module booting up.
GWM U2402:00 Ethernet Failure With Telematic Control Unit Module (TCU): No Sub Type Information Sets in the GWM when the TCU provisioning data is not received by the GWM within 300 seconds of both module booting up.

Possible Sources

  • Wiring, terminals, or connectors
  • TCU
  • APIM
B1 CHECK THE NETWORK COMMUNICATION
  • Using a diagnostic scan tool, carry out the network test.

Does the module in question (APIM , TCU ) pass the network test?
Yes GO to B2
No
REFER to: Controller Area Network (CAN) Module Communications Network (418-00A Controller Area Network (CAN) Module Communications Network, Diagnosis and Testing).

B2 CHECK FOR DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using a diagnostic scan tool, carry out the self-test for the module in question (APIM , TCU ).

Are any Diagnostic Trouble Codes (DTCs) present?
Yes DIAGNOSE the suspect module Diagnostic Trouble Codes (DTCs) first.
REFER to: Information and Entertainment System (415-00 Information and Entertainment System - General Information - Vehicles With: SYNC 4, Diagnosis and Testing).
No GO to B3

B3 RESET THE MODULE IN QUESTION (APIM, TCU)
  • Ignition ON.
  • Carry out the PMI programming for the module in question ( APIM , TCU ).
    REFER to: Module Programming (418-01A Module Configuration, General Procedures).
  • Ignition OFF.
  • Disconnect the module electrical connectors (APIM , TCU ).
  • Wait 2 minutes.
  • Connect the module electrical connectors (APIM , TCU ).
  • Ignition ON.
  • View the following TCU OTA Parameter Identifications (PIDs)

  • Access the  TCU  and monitor the  AUTHMODE  PID


Does the authorization state PID still indicate Unprovisioned?
Yes INSTALL a new TCU ,
REFER to: Telematics Control Unit (TCU) Module (415-00 Information and Entertainment System - General Information - Vehicles With: SYNC 4, Removal and Installation).
No GO to B4

B4 RECHECK FOR DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using a diagnostic scan tool, clear the GWM Diagnostic Trouble Codes (DTCs).
  • Ignition OFF.
  • Ignition ON.
  • Wait 10 seconds
  • Using a diagnostic scan tool, carry out the GWM self-test.

Is DTC U2401:00 or U2402:00 still present?
Yes GO to B5
No The module reset has resolved the concern.

B5 CHECK THE ETHERNET CIRCUIT FOR AN OPEN
  • Ignition OFF.
  • Disconnect the GWM Ethernet cable master connector .
  • NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector. Disconnect the suspect module Ethernet cable from the GWM Ethernet master connector to enable efficient probing. Refer to the instruction at the beginning of this pinpoint test.
  • Disconnect the suspect module Ethernet cable connector (APIM , IPC , IPMA , TCU ).
  • NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector. Disassemble the suspect module Ethernet cable connector as shown at the start of this pinpoint test to enable probing of the Ethernet cable. Refer to the instruction at the beginning of this pinpoint test.
  • Measure:
    Positive Lead Measurement / Action Negative Lead
    Ethernet cable at the GWM , pin 1 Ethernet cable at the suspect module, pin 1
    Ethernet cable at the GWM , pin 2 Ethernet cable at the suspect module, pin 2

Are the resistances less than 3 ohms?
Yes GO to B6
No INSTALL a new Ethernet cable.

B6 CHECK THE ETHERNET CIRCUIT FOR A SHORT TO GROUND
  • Measure:
    Positive Lead Measurement / Action Negative Lead
    Ethernet cable, pin 1   Ground
    Ethernet cable, pin 2   Ground

Are the resistances greater than 10,000 ohms?
Yes GO to B7
No INSTALL a new Ethernet cable.

B7 CHECK THE ETHERNET CIRCUIT FOR A SHORT TOGETHER
  • Measure:
    Positive Lead Measurement / Action Negative Lead
    Ethernet cable, pin 1 Ethernet cable, pin 2

Is the resistance greater than 10,000 ohms?
Yes GO to B8
No INSTALL a new Ethernet cable.

B8 CHECK THE ETHERNET CIRCUIT FOR A SHORT TO POWER
  • Ignition ON.
  • Measure:
    Positive Lead Measurement / Action Negative Lead
    Ethernet cable, pin 1   Ground
    Ethernet cable, pin 2   Ground

Is any voltage present?
Yes INSTALL a new Ethernet cable.
No If the APIM is the suspect module, GO to B9
If the TCU is the suspect module, GO to B10

B9 CHECK FOR CORRECT APIM (SYNC MODULE) OPERATION
  • Ignition OFF.
  • Disconnect and inspect the APIM connectors.
  • Repair:
    • Corrosion (clean module pins or install new connectors or terminals)
    • Damaged or bent pins (install new terminals or pins)
    • Pushed-out pins (install new pins as necessary)
  • Reconnect the APIM 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 APIM .
REFER to: SYNC Module [APIM] (415-00 Information and Entertainment System - General Information - Vehicles With: SYNC 4, Removal and Installation).
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.

B10 CHECK FOR CORRECT TCU (TELEMATIC CONTROL UNIT MODULE) OPERATION
  • Ignition OFF.
  • Disconnect and inspect the TCU connector.
  • Repair:
    • Corrosion (clean module pins or install new connectors or terminals)
    • Damaged or bent pins (install new terminals or pins)
    • Pushed-out pins (install new pins as necessary)
  • Reconnect the TCU 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 TCU ,
REFER to: Telematics Control Unit (TCU) Module (415-00 Information and Entertainment System - General Information - Vehicles With: SYNC 4, Removal and Installation).
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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