Lincoln Nautilus Manuals

Lincoln Nautilus: Steering Wheel and Column Electrical Components / Steering Wheel and Column Electrical Components - System Operation and Component Description. Description and Operation

Lincoln Nautilus 2018-2022 Service Manual / Chassis / Steering System / Steering Wheel and Column Electrical Components / Steering Wheel and Column Electrical Components - System Operation and Component Description. Description and Operation

System Operation

System Diagram - Push Button Ignition Switch

E343638 *.sttxt { visibility: hidden; } *.stcallout { visibility: visible; } 1 GWM 2 PCM 3 Ignition Switch (Push Button) 4 Ignition Mode Indicator 5 BCM 6 Run/Start Relay
Item Description
1 GWM
2 PCM
3 Ignition Switch (Push Button)
4 Ignition Mode Indicator
5 BCM
6 Run/Start Relay

Network Message Chart - Push Button Ignition Switch

  GWM Module Network Input Messages


Broadcast Message Originating Module Message Purpose
Ignition status   BCM This message informs the GWM of the current ignition status; off, run, start, unknown or invalid which then transmits the message to modules on other networks.

  PCM Module Network Input Messages


Broadcast Message Originating Module Message Purpose
Ignition status   BCM This message informs the PCM of the current ignition status; off, run, start, unknown or invalid.

Push Button Ignition Switch

The push button ignition switch (integrated into the GSM is used to control the ignition mode.

There are two circuits the BCM monitors from the push button ignition switch to change the ignition mode. One circuit is monitored for voltage and the other for a ground signal. When the START/STOP button is pressed, one circuit routes battery voltage to the BCM while a voltage signal from the BCM on the second circuit is routed to ground, indicating a request to change the ignition mode. Changing the ignition mode out of OFF works in conjunction with the PATS . The BCM must recognize a valid programmed key before it changes the ignition mode out of OFF. For information regarding the PATS ,
Refer to: Passive Anti-Theft System (PATS) - System Operation and Component Description (419-01B Passive Anti-Theft System (PATS), Description and Operation).

The BCM contains a non-serviceable run/start relay.

Additionally, the BCM controls a serviceable run/start relay located in the BJB .

When the relays are activated, they provide voltage to various vehicle electrical systems.

Refer to the following table for information about achieving the various ignition modes.

Ignition Mode Entry Condition Desired Ignition Mode Action To Take
OFF ON (engine off) Press the START/STOP button without applying the brake pedal.
OFF or ON ON (engine running) Apply the brake pedal and then press the START/STOP button.
ON (engine off) OFF Press the START/STOP button.
ON (engine running) OFF Press the START/STOP button.

Ignition Mode LED Indicator

The ignition mode LED indicates the ignition mode of the vehicle. The BCM controls the voltage to the ignition mode LED indicator. Refer to the following table.

Ignition Mode Ignition Mode LED Indicator
OFF Off
ON (engine off) Flashing
ON (engine running) On

OFF

The BCM controls the relays providing voltage to the vehicle electrical systems. When the ignition is in the ON mode, a single press and release of the START/STOP button (without applying the brake pedal) changes the ignition to the OFF mode. No programmed key is required to change the ignition to the OFF mode when the vehicle is running.

If the vehicle is in motion, a momentary press of the START/STOP button does not shut the vehicle off. If the vehicle is moving at a speed greater than 15 km/h (9 mph), the START/STOP button must be pressed and held for longer than one second (or pressed 3 times within 2 seconds) to turn the ignition off.

When the BCM changes the ignition mode to OFF, it communicates the ignition mode to the other modules by sending an ignition status message over the CAN .

ON

When the ignition is in the ON mode, the BCM activates the run/start relays to provide voltage to the vehicle electrical systems and communicates the ignition mode to the other modules by sending an ignition status message over the CAN .

When the vehicle enters ON mode, multiple indicators in the IPC prove out and the IPC displays the gear selection and the vehicle mileage.

START

The vehicle temporarily enters the START mode if the brake pedal is applied when the START/STOP button is pressed, and a valid programmed key is detected within the vehicle.

In addition to activating the run/start relays, the BCM communicates the ignition mode to the other modules by sending an ignition status message over the CAN .

After the ignition has completed the vehicle start sequence, the ignition mode returns to ON and the ignition mode LED in the START/STOP button illuminates steadily.

The engine can be started from any ignition mode.

System Diagram - Heated Steering Wheel (vehicles not equipped with adaptive steering)


Item Description
1 MS-CAN
2 HS-CAN3
3 HS-CAN1
4 FDIM
5 FCIM
6 APIM
7 IPC
8 HSWM
9 GWM
10 BCM
11 PCM
12 Temperature sensor
13 Heated steering wheel
14 Heating element

Network Message Chart - Heated Steering Wheel

  HSWM Network Input Messages


Broadcast Message Originating Module Message Purpose
Engine status   PCM This message indicates to the HSWM whether the engine is running.
Ignition status   BCM Indicates which ignition mode is active.
Steering wheel heat request   FCIM Message is used to activate the heated steering wheel function when the touchscreen button is pressed on the FDIM , or when the conditions are met to activate the heated steering wheel (and heated seats) during a remote start.

  FCIM Module Network Input Messages


Broadcast Message Originating Module Message Purpose
Steering wheel heat request   APIM This message informs the FCIM that the heated steering wheel touchscreen button was pressed on the FDIM .
Ambient air temperature filtered   IPC This message is used by the FCIM when determining if outside conditions are cold enough to request the heated steering wheel be activated during remote start operation.

Heated Steering Wheel

When the engine is running and the HSWM receives a request to heat the steering wheel, the HSWM applies voltage and ground to the steering wheel heating elements (integral to the steering wheel) to heat the steering wheel to a temperature of approximately 82-94°F (28-34°C). The heated steering wheel temperature is maintained by the HSWM using a temperature sensor in the steering wheel.

The HSWM supplies voltage and ground to the heating elements integral to the steering wheel and maintains the temperature based on the steering wheel temperature sensor reading until the heated steering wheel is switched off on the FDIM or the ignition is turned off.

The controls and indicators for the heated steering wheel system are located on the FDIM (touchscreen) only. The FDIM does not communicate on any network and is connected directly to the APIM .

Remote Start System

The heated steering wheel system (along with the heated front seats) may be configured using the message center to activate when the remote start feature is used, based on outside air temperature. During remote start, the outside air temperature is continually monitored by the HVAC system. The heated steering wheel system activation changes if the outside air changes from cold to moderate or warm temperatures or back from moderate or warm to cold temperatures.

System Diagram - Heated Steering Wheel (vehicles equipped with adaptive steering)


Item Description
1 MS-CAN
2 HS-CAN3
3 HS-CAN1
4 HS-CAN2
5 FDIM
6 FCIM
7 APIM
8 IPC
9 SECM
10 Heated steering wheel
11 BCM
12 PCM
13 Temperature sensor
14 Heating element
15 GWM

Network Message Chart - Heated Steering Wheel

  SECM Network Input Messages


Broadcast Message Originating Module Message Purpose
Engine status   PCM This message indicates to the HSWM whether the engine is running.
Ignition status   BCM Indicates which ignition mode is active.
Steering wheel heat request   FCIM Message is used to activate the heated steering wheel function when the touchscreen button is pressed on the FDIM , or when the conditions are met to activate the heated steering wheel (and heated seats) during a remote start.

  FCIM Module Network Input Messages


Broadcast Message Originating Module Message Purpose
Steering wheel heat request   APIM This message informs the FCIM that the heated steering wheel touchscreen button was pressed on the FDIM .
Ambient air temperature filtered   IPC This message is used by the FCIM when determining if outside conditions are cold enough to request the heated steering wheel be activated during remote start operation.

Heated Steering Wheel

When the SECM receives a request to heat the steering wheel and the engine is running, the SECM applies voltage and ground to the steering wheel heating elements (integral to the steering wheel) to heat the steering wheel to a temperature of approximately 82-94°F (28-34°C). The heated steering wheel temperature is maintained by the SECM using a temperature sensor in the steering wheel.

The SECM supplies voltage and ground to the heating elements integral to the steering wheel and maintains the temperature based on the steering wheel temperature sensor reading until the heated steering wheel is switched off on the FDIM or the ignition is turned off.

The controls and indicators for the heated steering wheel system are located on the FDIM (touchscreen) only. The FDIM does not communicate on any network and is connected directly to the APIM .

Remote Start System

The heated steering wheel system (along with the heated front seats) may be configured using the message center to activate when the remote start feature is used, based on outside air temperature. During remote start, the outside air temperature is continually monitored by the HVAC system. The heated steering wheel system activation changes if the outside air changes from cold to moderate or warm temperatures or back from moderate or warm to cold temperatures.

Component Description

Push Button Ignition Switch

The push button ignition switch is a momentary dual contact switch that provides direct input to the BCM and PCM . Both sets of contacts are normally open. When the START/STOP button is pressed, one set of contacts provides a ground signal to the BCM and the other set of contacts supplies voltage to the BCM and the PCM .

The ignition mode LED indicator is located near the top of the START/STOP button and is controlled by the BCM .

The ignition switch is part of the GSM .

Heated Steering Wheel

The steering wheel heater element is part of the steering wheel and cannot be serviced separately. The steering wheel temperature sensor is part of the steering wheel and cannot be serviced separately.

HSWM (vehicles not equipped with adaptive steering)

The HSWM controls the steering wheel heating elements. The HSWM uses the steering wheel temperature sensor to maintain the steering wheel temperature. The HSWM supplies voltage and ground to the heating elements integral to the steering wheel and maintains the temperature based on the steering wheel temperature sensor reading until the heated steering wheel is switched off on the FDIM or the ignition is turned off.

The HSWM requires PMI when replaced.

SECM (vehicles equipped with adaptive steering)

The SECM controls the steering wheel heating elements. The SECM uses the steering wheel temperature sensor to maintain the steering wheel temperature. The SECM supplies voltage and ground to the heating elements integral to the steering wheel and maintains the temperature based on the steering wheel temperature sensor reading until the heated steering wheel is switched off on the FDIM or the ignition is turned off.

The SECM cannot be serviced independently. It is only replaced as an assembly with the steering wheel.

The SECM requires PMI when replaced.

BCM

The BCM controls the run/start relays and sets the vehicle ignition mode based on inputs from the ignition switch, or push button ignition switch. It communicates the ignition mode to other modules over the CAN . If a fault is detected with the ignition switch system, Diagnostic Trouble Codes (DTCs) are set in the BCM .

When the BCM is replaced, the parameter reset and PMI procedures must be carried out and at least 2 keys programmed to it.

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    Categories

    USB Ports

    Locating the USB Ports

    Data Transfer USB Ports

    Lincoln Nautilus. USB Ports

    The USB Ports could be in the following locations:

    On the lower instrument panel. Inside the media bin. Inside the center console.

    Note: These USB ports can also charge devices.

    read more

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