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Home >> Lincoln >> 2021 >> Nautilus Base, FWD >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrumentation, Message Center And Warning Chimes (1 Of 2) >> Description And Operation >> Instrument Panel Cluster (IPC) - System Operation and Component Description >> System Operation >> Indicators

System Operation: Indicators

ABS Warning Indicator 

The IPC receives the ABS warning indicator request message from the GWM over the HS-CAN3. The GWM receives the ABS warning indicator request message from the ABS module over the HS-CAN2. If a fault condition exists in the ABS, the ABS module sends the ABS warning indicator request message to either flash or illuminate the ABS warning indicator.

Refer to ABS/Brake/Stability-Traction Control System Indication description for information on the conditions when the ABS warning indicator is turned on.

ABS/Brake/Stability-Traction Control System Indication 

The brake/stability-traction control system indication is controlled almost entirely by the ABS module. The ABS module can illuminate multiple indicators for various fault conditions. The following table provides a summary of the basic fault conditions and the indicators that are illuminated for each condition.

NOTE: Refer to the Normal Operation and Fault Condition description before each brake/stability-traction control system indicator Pinpoint Test (PPT) for the IPC default action for network/missing message conditions.
Event/Fault Condition ABS Warning Indicator Status Brake Warning Indicator Status Electronic Park Brake Fault Indicator Status Stability-Traction Control Indicator Status Stability-Traction Control Disabled Indicator Status
Parking brake applied Off Flashing while applying
On when applied		 Off Off Off
Low brake fluid level or brake fluid level input concern Off On Off Off Off
Stability-traction control event Off Off Off Flashing Off
Stability-traction control disabled by driver Off Off Off Off On
Single wheel speed sensor faults On On Off On On
2 wheel speed sensor faults on the same axle or 3 wheel speed sensor faults On Flashing or on On On On
HCU valve fault On On Off On On
ABS module fault On Flashing or on On On On
HCU pressure sensor fault (master cylinder pressure input) Off On Off On On
ABS battery voltage faults On Flashing or on On On On
ABS pump motor fault On On Off On On
ABS low brake booster vacuum or vacuum sensor fault Off On Off Off Off
Steering wheel angle sensor center not found fault Off On Off On On
ABS to CAN total failure Off (4x2)
On (4x4)		 Off Off On On
Thermal shutdown to brake over-temperature condition Off Off Off Off Off
Parking brake switch fault Off Flashing On Off Off
Configuration mismatch Off Off Off Off Off
Vehicle Identification Number (VIN) mismatch On On Off On On
ACC and ABS both active Off Off Off Flashing Off

Airbag Warning Indicator 

The IPC receives the airbag warning indicator request from the GWM over the HS-CAN3. The GWM receives the airbag warning indicator request from the RCM over the HS-CAN2. If a SRS concern is detected, the RCM sets a DTC and the IPC illuminates the airbag warning indicator.

Brake Warning Indicator 

The brake warning indicator informs the driver the brake fluid level is low, there is a failure in the base brake system or the electronic park brake is applied. The IPC uses 3 messaged inputs to control the brake warning indicator.

The IPC receives the brake (red) warning indicator request, the brake fluid level low message request and the parking brake (red) indicator request messages from the GWM over the HS-CAN3.

The GWM receives the brake (red) warning indicator request and the parking brake (red) indicator request from the ABS module over the HS-CAN2.

The GWM receives the brake fluid level low message request from the BCM over the HS-CAN2.

Refer to ABS/Brake/Stability-Traction Control System Indication description for information on the conditions when the brake warning indicator is turned on.

Electronic Park Brake Indicator 

The electronic park brake indicator indicates a fault in the electronic park brake system. The IPC receives the parking brake (yellow) indicator request from the GWM over the HS-CAN3. The GWM receives the parking brake (yellow) indicator request from the ABS module over the HS-CAN2.

Front Fog Lamp Indicator 

The front fog lamp indicator informs the driver that the front fog lamps are on. The IPC receives the front fog lamp status message from the GWM over the HS-CAN3. The GWM receives the front fog lamp status message from the BCM over the HS-CAN1.

High Beam Indicator 

The high beam indicator informs the driver that the high beams are on. The IPC receives the high beam status message from the GWM over the HS-CAN3. The GWM receives the high beam status message from the BCM over the HS-CAN1.

LED Low Beam Malfunction Indicator (If Equipped With LED Headlamps) 

The LED informs the driver an LED low beam is not functioning correctly. The IPC receives the headlamp low beam out message from the GWM over the HS-CAN3. The GWM receives the headlamp low beam out message from the BCM over the HS-CAN1.

LH/ RH Turn Signal/Hazard Indicator 

When the multifunction switch is in the LH or RH turn position or if the hazard switch is on, the BCM sends the turn indication request to the GWM over the HS-CAN1. The GWM sends the turn indication request to the IPC over the HS-CAN3. Upon receipt of the applicable turn signal on/off message, the IPC flashes the turn signal indicator on and off.

Lights On Indicator 

When the parking lamps are turned on, the BCM sends the parklamp status message to the GWM over the HS-CAN1. The IPC receives the parklamp status message from the GWM over the HS-CAN3 to illuminate the lights on indicator.

MIL 

The IPC receives the MIL request from the GWM over the HS-CAN3. The GWM receives the MIL request from the PCM over the HS-CAN1.

Rear Fog Lamp Indicator (If Equipped) 

The rear fog lamp indicator informs the driver that the rear fog lamp is on. The IPC receives the rear fog lamp status message from the GWM over the HS-CAN3. The GWM receives the rear fog lamp status message from the BCM over the HS-CAN1.

Seatbelt Warning Indicator 

The RCM monitors the driver seatbelt position through the driver seatbelt buckle switch. The RCM provides the driver seatbelt buckle status message to the GWM over the HS-CAN2. The GWM provides the driver seatbelt status message to the IPC over the HS-CAN3 to either turn on or turn off the seatbelt warning indicator.

Stability-Traction Control Indicator (Sliding Car Icon) 

The stability-traction control indicator (sliding car icon) informs the driver of the current status of the stability and traction control systems. The stability-traction control indicator illuminates when a fault condition exists or when an active traction control or stability control event is occuring. The IPC receives the stability-traction control indicator request message from the GWM over the HS-CAN3. The GWM receives the stability-traction control indicator request message from the ABS over the HS-CAN2.

Refer to ABS/Brake/Stability-Traction Control System Indication description for information on the conditions when the stability-traction control indicator (sliding car icon) is turned on.

Stability-Traction Control Disabled Indicator (Sliding Car OFF Icon) 

The stability-traction control is configured on/off through the message center. When the driver enables or disables the stability-traction control system, the ABS module sends the traction control mode message to the GWM over the HS-CAN2. The GWM sends the traction control mode message to the IPC over the HS-CAN3 to illuminate or turn off the stability-traction control disabled indicator (sliding car OFF icon) based upon the system state.

Refer to ABS/Brake/Stability-Traction Control System Indication description for information on the conditions when the stability-traction control disabled indicator (sliding car OFF icon) is turned on.

When a MyKey® administrator has set the AdvanceTrac® feature to always on and a MyKey® programmed key is in use, the stability-traction control system cannot be disabled. The menu selection in the message center used to disable the stability-traction control system does not display when a MyKey® is in use, but remains active for the MyKey® administrator to select the AdvanceTrac® always on feature off. The stability-traction control indicator still functions normally to indicate a stability-traction control system fault and a stability-traction control active event.

TPMS Warning Indicator 

The IPC receives the tire pressure warning indicator message from the GWM over the HS-CAN3. The GWM receives the tire pressure warning indicator message from the BCM over the HS-CAN1.

If the BCM determines the tire pressure has exceeded the low tire pressure limits, the tire pressure warning indicator request message is sent to the IPC to illuminate the TPMS warning indicator.

If a TPMS monitor or sensor fault condition exists, the BCM sends the tire pressure warning indicator request message to the IPC to flash the TPMS warning indicator. The IPC flashes the TPMS warning indicator for 75 seconds then turns the indicator on solid.

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