Nissan Pathfinder: Cruise Control System - Propilot/propilot Assist

• Precautions
• Symptom Diagnosis. Propilot Assist

Precautions Nissan Pathfinder R53

Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER"

The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of collisions.

Information necessary to service the system safely is included in the “SRS AIR BAG” and “SEAT BELT” sections of this Service Manual.

WARNING:

Always observe the following items for preventing accidental activation:

• To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in the event of a collision that would result in air bag inflation, it is recommended that all maintenance and repair be performed by an authorized NISSAN/INFINITI dealer.

• Improper repair, including incorrect removal and installation of the SRS, can lead to personal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag Module, see “SRS AIR BAG”.

• Never use electrical test equipment on any circuit related to the SRS unless instructed to in this Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or harness connectors.

PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS

WARNING:

Always observe the following items for preventing accidental activation:

• When working near the Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the ignition/power switch ON or engine running, never use air or electric power tools or strike near the sensor(s) with a hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly causing serious injury.

• When using air or electric power tools or hammers, always switch the ignition/power switch OFF, disconnect the 12V battery or batteries, and wait at least 3 minutes before performing any service.

Precautions for Removing Battery Terminal

• With the adoption of Auto ACC function, ACC power is automatically supplied by operating the Intelligent Key or remote keyless entry or by opening/closing the driver side door. In addition, ACC power is supplied even after the ignition switch is turned to the OFF position, i.e. ACC power is supplied for a certain fixed time.

• When disconnecting the 12V battery terminal, turn off the ACC power before disconnecting the 12V battery terminal, observing “How to disconnect 12V battery terminal” described below.

  

  NOTE:

  Some ECUs operate for a certain fixed time even after ignition switch is turned OFF and ignition power supply is stopped. If the battery terminal is disconnected before ECU stops, accidental DTC detection or ECU data damage may occur.

• For Nissan Pathfinder vehicles with the 2-batteries, be sure to connect the main battery and the sub battery before turning ON the ignition switch.

  NOTE:

  If the ignition switch is turned ON with any one of the terminals of main battery and sub battery disconnected, then DTC may be detected.

• After installing the 12V battery, always check "Self Diagnosis Result" of all ECUs and erase DTC.

  NOTE:

  The removal of 12V battery may cause a DTC detection error.

HOW TO DISCONNECT 12V BATTERY TERMINAL

Disconnect 12V battery terminal according to instruction described below.

1. Open the hood.

2. Turn ignition switch to the ON position.

3. Turn ignition switch to the OFF position with the driver side door opened.

4. Get out of the Nissan Pathfinder vehicle and close the driver side door.

5. Wait at least 3 minutes.

   CAUTION:

   While waiting, never operate the Nissan Pathfinder vehicle such as locking, opening, and closing doors. Violation of this caution results in the activation of ACC power supply according to the Auto ACC function.

6. Remove 12V battery terminal.

   CAUTION:

   After installing 12V battery, always check self-diagnosis results of all ECUs and erase DTC.

Precaution for ProPILOT Assist System Service

CAUTION:

• Turn the ProPILOT Assist switch OFF in conditions similar to driving, such as free rollers or a chassis dynamometer.。

• Erase the DTC when replacing parts of ProPILOT Assist system, then check the operation of ProPILOT Assist system after radar alignment and camera aiming if necessary.

Symptom Diagnosis. Propilot Assist Nissan Pathfinder 2022

Propilot Assist 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 Nissan Pathfinder vehicle ahead cannot be changed
	System does not cancel when selector lever sets ON "N"	TCM Refer to DTC Index.
Chime	Chime does not sound	Combination meter Refer to DTC Index (7 inch Information Display). Refer to DTC Index (FULL TFT METER).
Control	Driving force is hunting	Refer to Diagnosis Procedure
Function to detect a Nissan Pathfinder vehicle ahead	System frequently cannot detect a vehicle ahead	Refer to Diagnosis Procedure
	Distance to detect a Nissan Pathfinder vehicle ahead is short
	System misidentifies a vehicle even though there is no Nissan Pathfinder vehicle ahead	Perform radar alignment: Work Procedure camera aiming adjustment: Work Procedure Perform ProPILOT Assist system action test: Work Procedure
	System misidentifies a Nissan Pathfinder 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 display does not appear on the vehicle information display when the ProPILOT Assist switch is pressed.

• When the ProPILOT Assist display is displayed on the Nissan Pathfinder 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(FULL TFT METER) or DTC Index(7 inch information display models).

NO>>

Check ECM self-diagnosis results ans 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 cannot be set by pressing the SET- switch.

NOTE:

The system cannot be set in the following cases.

• When traveling below 30 km/h (20 MPH) and a Nissan Pathfinder vehicle ahead is not detected

• When the shift lever 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 is selected

• When the SAND mode is selected (AWD models)

• When the MUD/RUT 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”.

   • “Nissan Pathfinder Vehicle speed”

   • "BRAKE SW"

Is there a malfunctioning item?

“Nissan Pathfinder Vehicle speed”>>

Refer to DTC Diagnosis Procedure.

“BRAKE SW”>>

Refer to Diagnosis Procedure.

Driving Force Is Hunting

Diagnosis Procedure

The vehicle causes hunting when the ProPILOT Assist 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 Nissan Pathfinder 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 Nissan Pathfinder 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 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 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 Nissan Pathfinder 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 grill.

Do foreign matter adhere?

YES>>

GO TO 3.

NO>>

GO TO 2.

DISTANCE SENSOR VISUAL CHECK (2)

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

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

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

4. Check that the Nissan Pathfinder 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 grill. Refer to Removal and Installation.

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

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

5. Check that the Nissan Pathfinder 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 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 system is normal.

>>

INSPECTION END

The System Does Not Detect the Vehicle Ahead at All

Diagnosis Procedure

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

CHECK ProPILOT ASSIST SYSTEM DISPLAY ON INFORMATION DISPLAY

1. Start the self-diagnosis mode of combination meter. Refer to On Board Diagnosis Function(FULL TFT METER) or On Board Diagnosis Function(7 inch information display models).

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 grill.

Do foreign materials adhere?

YES>>

GO TO 4.

NO>>

GO TO 3.

VISUAL CHECK (2)

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

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

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

4. Check that the Nissan Pathfinder 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 grill. Refer to Removal and Installation.

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

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

5. Check that the Nissan Pathfinder 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 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 system is normal.

>>

INSPECTION END

The System Operates Even When Using Turn Signal

Diagnosis Procedure

ProPILOT Assist 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

Refer to Precautions for ProPILOT Assist.