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Nissan Armada 2025-2026 Service and Repair Manual: Propilot Assist 1.1

Nissan Armada 2025-2026 Service and Repair Manual / Cruise Control & Driver Assistance / Cruise Control System. Propilot Assist 1.1 / Propilot Assist 1.1

Propilot Assist 1.1 System Symptoms

Symptom Table

Symptoms Inspection item/Reference page
Operation System setting cannot be turned ON/OFF Refer to Diagnosis Procedure
System cannot be set (ProPILOT Assist switch turns ON/OFF) Refer to Diagnosis Procedure
CANCEL switch does not function

ECM

Refer to DTC Index
Resume does not function
Set speed does not increase
Set distance to a vehicle ahead cannot be changed
System does not cancel when shift position sets ON "N"

ECM

Refer to DTC Index
Chime Chime does not sound

Combination meter

Refer to DTC Index
Control Driving force is hunting Refer to Diagnosis Procedure
Function to detect a vehicle ahead System frequently cannot detect a vehicle ahead Refer to Diagnosis Procedure
Distance to detect a vehicle ahead is short
System misidentifies a vehicle even though there is no vehicle ahead

  • Perform radar alignment: Work Procedure

  • Camera aiming adjustment: Work Procedure

  • Perform ProPILOT Assist 1.1 system action test: Work Procedure
System misidentifies a vehicle in the next lane
The system does not detect the vehicle ahead at all Refer to Diagnosis Procedure
Operation Turn signal operates even using turn signal Refer to Diagnosis Procedure

System Settings Cannot Be Turned On/off

Diagnosis Procedure

  • The ProPILOT Assist 1.1 display does not appear on the vehicle information display when the ProPILOT Assist switch is pressed.

  • When the ProPILOT Assist 1.1 display is displayed on the vehicle information display, the display does not disappear when the ProPILOT Assist switch is pressed.

ProPILOT ASSIST SWITCH INSPECTION

  1. Start the engine.

  2. Check that “MAIN SW” operate normally in “DATA MONITOR” of “ICC/ADAS 2” with CONSULT.

Is the inspection result normal?

YES>>

Check combination meter self-diagnosis results ans perform diagnosis on the detected DTC. Refer to DTC Index.

NO>>

Check ECM self-diagnosis results and perform diagnosis on the detected DTC. Refer to DTC Index.

System Cannot Be Set (propilot Assist Switch Turns On/off)

Diagnosis Procedure

The ProPILOT Assist switch can be turned ON/OFF; however,ProPILOT Assist 1.1 cannot be set by pressing the SET- switch.

NOTE:

The system cannot be set in the following cases.

  • When traveling below 30 km/h (19 MPH) and a vehicle ahead is not detected

  • When the shift position is moved out of the D (Drive) position or into the manual shift mode

  • When the parking brake is applied

  • When the brakes are operated by the driver

  • When the VDC system is OFF

  • When the VDC system (including the traction control system) is activated

  • When the SNOW mode or OFF-ROAD mode is selected (AWD models)

  • When a wheel is slipping

  • When any door is open

  • When the driver’s seat belt is not fastened

CHECK EACH SWITCH AND VEHICLE SPEED SIGNAL

  1. Start the engine.

  2. Check that the following items operate normally in “DATA MONITOR” of “ICC/ADAS 2”.

    • “vehicle speed”

    • "SET/COAST SW"

    • "BRAKE SW"

Is there a malfunctioning item?

“vehicle speed”>>

Refer to DTC Description.

"SET/ COAST SW">>

Refer to DTC Diagnosis Procedure.

“BRAKE SW”>>

Refer to DTC Description.

Driving Force Is Hunting

Diagnosis Procedure

The vehicle causes hunting when the ProPILOT Assist 1.1 system is active.

PERFORM SELF-DIAGNOSIS OF ECM

  1. Perform “All DTC Reading” with CONSULT.

  2. Check if the DTC is detected in self-diagnosis results of “ENGINE”. Refer to DTC Index.

Is any DTC detected?

YES>>

GO TO 4.

NO>>

GO TO 2.

CHECK DISTANCE SENSOR

  1. Check the vehicle driving conditions. Refer to Diagnosis Procedure.

  2. Check the distance sensor for contamination, foreign materials, or cracks.

>>

GO TO 3.

CHECK FRONT CAMERA UNIT

  1. Check the vehicle driving conditions. Refer to Diagnosis Procedure.

  2. Check the front camera unit or contamination, foreign materials, or cracks.

>>

INSPECTION END

REPAIR OR REPLACE MALFUNCTIONING PARTS

Repair or replace malfunctioning parts identified by the self-diagnosis result.

>>

GO TO 5.

CHECK ProPILOT ASSIST 1.1 SYSTEM

  1. Erase the self-diagnosis results, and then perform “All DTC Reading” again after performing the action test. Refer to Work Procedure.

  2. Check that the ProPILOT Assist 1.1 system is normal.

>>

INSPECTION END

Frequently Cannot Detect the Vehicle Ahead / Detection Zone Is Short

Diagnosis Procedure

The detection function may become unstable in the following cases.

  • When radar reflections from the vehicle ahead is interrupted.

  • When driving a road with extremely sharp corners.

  • When the sensor cannot detect a vehicle ahead while the vehicle ahead passes a hill or valley.

DISTANCE SENSOR VISUAL CHECK (1)

Check the contamination and foreign matter on the distance sensor area of the front bumper.

Do foreign matter adhere?

YES>>

GO TO 3.

NO>>

GO TO 2.

DISTANCE SENSOR VISUAL CHECK (2)

  1. Remove the front bumper. Refer to Removal and Installation.

  2. Check distance sensor for contamination and foreign matter.

Do foreign matter adhere?

YES>>

GO TO 3.

NO>>

GO TO 4.

WIPE OUT DIRT AND FOREIGN MATERIALS (1)

Wipe out the contamination and foreign matter in the area around the distance sensor.

>>

GO TO 8.

DISTANCE SENSOR VISUAL CHECK (3)

Check distance sensor for cracks and scratches.

Are there any cracks or scratches?

YES>>

GO TO 6 .

NO>>

GO TO 5.

PERFORM RADAR ALIGNMENT

  1. Install the front bumper. Refer to Removal and Installation.

  2. Perform the radar alignment. Refer to Work Procedure.

  3. Perform ProPILOT Assist 1.1 system action test. Refer to Work Procedure.

  4. Check that the vehicle ahead detection performance improves.

Does it improve?

YES>>

INSPECTION END

NO>>

GO TO 6.

REPLACE DISTANCE SENSOR

  1. Replace the distance sensor. Refer to Removal and Installation.

  2. Install the front bumper. Refer to Removal and Installation.

  3. Perform the radar alignment. Refer to Work Procedure.

  4. Perform ProPILOT Assist 1.1 system action test. Refer to Work Procedure.

  5. Check that the vehicle ahead detection performance improves.

Does it improve?

YES>>

INSPECTION END

NO>>

GO TO 7.

REPLACE ADAS CONTROL UNIT 2

Replace ADAS control unit 2. Refer to Removal and Installation.

>>

GO TO 8.

CHECK ProPILOT ASSIST 1.1 SYSTEM

  1. Erase the self-diagnosis results, and then perform “All DTC Reading” again after performing the action test. Refer to Work Procedure.

  2. Check that the ProPILOT Assist 1.1 system is normal.

>>

INSPECTION END

The System Does Not Detect the Vehicle Ahead at All

Diagnosis Procedure

When ProPILOT Assist 1.1 system is active, the ProPILOT Assist 1.1 system does not perform any control even through there is a vehicle ahead.

CHECK ProPILOT ASSIST 1.1 SYSTEM DISPLAY ON INFORMATION DISPLAY

  1. Start the self-diagnosis mode of combination meter. Refer to On Board Diagnosis Function.

  2. Check that the information display turns ON normally.

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Replace the combination meter.

VISUAL CHECK (1)

Check the contamination and foreign matter on the distance sensor area of the front bumper.

Do foreign materials adhere?

YES>>

GO TO 4.

NO>>

GO TO 3.

VISUAL CHECK (2)

  1. Remove the front bumper. Refer to Removal and Installation.

  2. Check distance sensor for contamination and foreign matter.

Do foreign matter adhere?

YES>>

GO TO 4.

NO>>

GO TO 5.

WIPE OUT DIRT AND FOREIGN MATERIALS

Wipe out the contamination and foreign matter in the area around the distance sensor.

>>

GO TO 9.

VISUAL CHECK (3)

Check distance sensor for cracks and/or scratches.

Are there cracks?

YES>>

GO TO 7.

NO>>

GO TO 6.

PERFORM RADAR ALIGNMENT

  1. Install the front bumper. Refer to Removal and Installation.

  2. Perform the radar alignment. Refer to Work Procedure.

  3. Perform ProPILOT Assist 1.1 system action test. Refer to Work Procedure.

  4. Check that the vehicle ahead detection performance improves.

Does it improve?

YES>>

INSPECTION END

NO>>

GO TO 8.

REPLACE DISTANCE SENSOR

  1. Replace the distance sensor. Refer to Removal and Installation.

  2. Install the front bumper. Refer to Removal and Installation.

  3. Perform the radar alignment. Refer to Work Procedure.

  4. Perform ProPILOT Assist 1.1 system action test. Refer to Work Procedure.

  5. Check that the vehicle ahead detection performance improves.

Does it improve?

YES>>

INSPECTION END

NO>>

GO TO 8.

REPLACE ADAS CONTROL UNIT 2

Replace ADAS control unit 2. Refer to Removal and Installation.

>>

GO TO 9.

CHECK ProPILOT ASSIST 1.1 SYSTEM

  1. Erase the self-diagnosis results, and then perform “All DTC Reading” again after performing the action test. Refer to Work Procedure.

  2. Check that the ProPILOT Assist 1.1 system is normal.

>>

INSPECTION END

The System Operates Even When Using Turn Signal

Diagnosis Procedure

ProPILOT Assist 1.1 steering assist function operates even when the turn signals are active.

NOTE:

For the operational conditions of steering wheel assistance function. Refer to System Description.

CHECK TURN SIGNAL OPERATION

Check that both right and left turn signals are normal.

Is the inspection result normal?

YES >>

Replace the ADAS control unit 2. Refer to Removal and Installation.

NO>>

Repair or replace malfunctioning parts. Refer to Symptom Table.

Normal Operating Condition

Symptom Description

PRECAUTIONS FOR ProPILOT ASSIST 1.1

Refer to Precautions for ProPILOT Assist 1.1.

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