Nissan Pathfinder: Brake Control System - Basic Inspection

• Diagnosis and Repair Work Flow
• Additional Service When Replacing Abs Actuator and Electric Unit (control Unit)
• Configuration
• Adjustment of Steering Angle Sensor Neutral Position
• Calibration of Decel G Sensor
• Adjustment of Brake Caliper Initial Position
• Removal/replacement of Rear Brake Pad or Rear Brake Caliper
• Change of System Mode

Diagnosis and Repair Work Flow Nissan Pathfinder SUV

Work Flow

DETAILED FLOW

INTERVIEW FROM THE CUSTOMER

Clarify customer complaints before inspection. First of all, perform an interview utilizing Diagnostic Work Sheet and reproduce the symptom as well as fully understand it. Ask customer about his/her complaints carefully. Check symptoms by driving Nissan Pathfinder vehicle with customer, if necessary.

CAUTION:

Customers are not professional. Never guess easily like “maybe the customer means that...,” or “ maybe the customer mentions this symptom”.

>>

GO TO 2.

CHECK SYMPTOM

Reproduce the symptom that is indicated by the customer, based on the information from the customer obtained by interview. Also check that the symptom is not caused by fail-safe mode. Refer to Fail-Safe.

CAUTION:

When the symptom is caused by normal operation, fully inspect each portion and obtain the understanding of customer that the symptom is not caused by a malfunction.

>>

GO TO 3.

PERFORM THE SELF-DIAGNOSIS

CONSULT

1. Ignition OFF (Auto ACC function OFF) to ON.

2. Select self-diagnosis for “ABS”.

Is DTC detected?

YES>>

Record or print self-diagnosis results and freeze frame data (FFD). GO TO 4.

NO>>

GO TO 6.

RECHECK THE SYMPTOM

CONSULT

1. Erase self-diagnostic results for “ABS”.

2. Ignition OFF (Auto ACC function OFF) → ON → OFF (Auto ACC function OFF).

3. Perform DTC confirmation procedures for the error-detected system.

   NOTE:

   If some DTCs are detected at the same time, determine the order for performing the diagnosis based on DTC Inspection Priority Chart.

Is DTC detected?

YES>>

GO TO 5.

NO>>

Check harness and connectors based on the information obtained by interview. Refer to Intermittent Incident.

REPAIR OR REPLACE ERROR-DETECTED PART

CONSULT

1. Disconnect 12V battery negative terminal.

2. Repair or replace error-detected parts.

3. Reconnect part or connector after repairing or replacing.

4. Connect 12V battery negative terminal.

5. When DTC is detected, erase self-diagnostic result for “ABS”.

   CAUTION:

   Ignition OFF (Auto ACC function OFF) → ON → OFF (Auto ACC function OFF) after erase self-diagnosis result.

>>

GO TO 7.

IDENTIFY ERROR-DETECTED SYSTEM BY SYMPTOM DIAGNOSIS

Estimate error-detected system based on symptom diagnosis and perform inspection.

Can the error-detected system be identified?

YES>>

GO TO 7.

NO>>

Check harness and connectors based on the information obtained by interview. Refer to Intermittent Incident.

FINAL CHECK

CONSULT

1. Check the reference value for “ABS”.

2. Recheck the symptom and check that the symptom is not reproduced on the same conditions.

Is the symptom reproduced?

YES>>

GO TO 3.

NO>>

Inspection End.

Diagnostic Work Sheet

DESCRIPTION

• In general, customers have their own criteria for a problem. Therefore, it is important to understand the symptom and status well enough by asking the customer about his/her concerns carefully. To systemize all the information for the diagnosis, prepare the interview sheet referring to the interview points.

• In some cases, multiple conditions that appear simultaneously may cause a DTC to be detected.

INTERVIEW SHEET SAMPLE

Interview sheet
Customer name	MR/MS	Registration number		Initial year registration
		Nissan Pathfinder Vehicle type		VIN
Storage date		Engine/traction Motor		Mileage	Mile (km)
Symptom		□ Does not operate (			) function
		□ Warning lamp turns ON. □ □ □ □ □ Other (			)
		□ Noise (Location: )   □ Vibration (Location: )
		□ Other (			)
First occurrence		□ Recently □ Other (			)
Frequency of occurrence		□ Always □ Under a certain conditions of □ Sometimes (  time(s)/day)
Climate conditions		□ Irrelevant
	Weather	□ Fine □ Cloud □ Rain □Snow □ Others (			)
	Temperature	□ Hot □Warm □ Cool □ Cold □ Temperature [Approx.			°F (°C)]
	Relative humidity	□ High □ Moderate □ Low
Road conditions		□ Ordinary road □ Highway □ Mountainous road (uphill or downhill) □ Rough road
Operating condition, etc.		□ Irrelevant □ When engine/traction motor starts □ During idling □ During driving □ During acceleration □ At constant speed driving □ During deceleration □ Immediately before stop [Nissan Pathfinder Vehicle speed: Approx.MPH (km/h)] □ During cornering (right curve or left curve) □ When steering wheel is steered (to right or to left)
Other conditions	VDC setting	□ On □ Off
	Use of other functions (ex. ICC)	□ Yes □ No (			)
	Presence of non-genuine parts installation	□ Yes □ No (			)
Memo

Additional Service When Replacing Abs Actuator and Electric Unit (control Unit) Nissan Pathfinder Fifth generation

Work Procedure

Description

When replacing the ABS actuator and electric unit (control unit), the procedures of BEFORE REPLACEMENT and AFTER REPLACEMENT must be performed.

BEFORE REPLACEMENT

When replacing the ABS actuator and electric unit (control unit), save “Operation log”.

AFTER REPLACEMENT

After replacing the ABS actuator and electric unit (control unit), the following items must be performed:

• ABS actuator and electric unit (control unit) programming

• ABS actuator and electric unit (control unit) configuration

• Air bleeding of brake fluid

• Adjust the neutral position of steering angle sensor

• Calibration of the decel G sensor

• Calibration of side G sensor

• Adjustment of rear brake caliper initialization position

• Change of system mode

• Actual driving 3 km or more

NOTE:

Save the odmeter information of combination meter in ABS actuator and electric unit (control unit).

Work Procedure [Before Replace ABS actuator and electric unit (control unit)]

SAVE “OPERATION LOG”

CONSULT

Save “Operation Log”, according to the procedure of “Programming” in CONSULT Operation Manual.

NOTE:

ABS actuator and electric unit (control unit) part number is saved in “Operating Log” saved in CONSULT.

>>

• Replace the ABS actuator and electric unit (control unit). Refer to Removal and Installation.

• After replacing the ABS actuator and electric unit (control unit), perform necessary work.

Work Procedure [After Replace ABS actuator and electric unit (control unit)]

CHECK “OPERATION LOG”

CONSULT

Check “Operation Log” saved before replacing the ABS actuator and electric unit (control unit), according to the procedure of “Programming” in CONSULT Operation Manual.

NOTE:

For the Nissan Pathfinder vehicle that the programming is to be performed, check if “Operation Log” of Vehicle Identification Number (VIN) is in Saved Data List.

Is there an applicable Operation Log in the Saved Data List?

YES>>

GO TO 2.

NO>>

GO TO 3.

PERFORM ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) PROGRAMMING

CONSULT

Perform ABC actuator and electric unit (control unit) programming, according to “Programming” of CONSULT Operation Manual. Refer to CONSULT Operation Manual.

CAUTION:

During programming, maintain the following conditions:

• Ignition switch: ON

• Electric parking brake: Apply

• Electric load: OFF

• Brake pedal: Not depressed

• 12V battery voltage: 12 – 13.5 V (Check the value displayed on the CONSULT screen.)

>>

GO TO 5.

READ IN ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) PART NUMBER BY “EPC LINKED”

Obtain ABS actuator and electric unit (control unit) part number by EPC (service parts catalog), according to the procedure of EPC linked in CONSULT Operation Manual. Refer to CONSULT Operation Manual.

CAUTION:

Select “EPC linked”.

NOTE:

“EPC linked” allows an appropriate programming by obtaining ECU part number from EPC (service parts catalog) even when the part number cannot be obtained from the old ECU used before replacing with a new one.

>>

GO TO 4.

PERFORM PROGRAMMING (EPC LINKED)

CONSULT

Perform ABS actuator and electric unit (control unit) programming according to the procedure of EPC linked in CONSULT Operation Manual. Refer to CONSULT Operation Manual.

CAUTION:

During programming, maintain the following conditions:

• Ignition switch: ON

• Electric parking brake: Apply

• Electric load: OFF

• Brake pedal: Not depressed

• 12V battery voltage: 12 – 13.5 V (Check the value displayed on the CONSULT screen.)

>>

GO TO 5.

PERFORM NECESSARY WORK

1. Perform configuration. Refer to Description.

2. Perform air bleeding. Refer to Bleeding Brake System.

3. Perform adjustment of steering angle sensor neutral position. Refer to Description.

4. Perform calibration of decel G sensor. Refer to Work Procedure.

5. Calibration of side G sensor. Refer to Work Procedure.

6. Adjustment of rear brake caliper initialization position. Refer to Work Procedure.

7. Perform the change of system mode. Refer to Work Procedure.

8. Select self-diagnosis for “All DTC Reading”.

9. Erase the memory of self-diagnosis results.

>>

End of work.

Configuration Nissan Pathfinder

Description

Vehicle specification needs to be written with CONSULT because it is not written after replacing the ABS actuator and electric unit (control unit).

The configuration requires network connection. CONSULT connects to network and then it downloads the configuration data from the server. Then CONSULT writes the Nissan Pathfinder vehicle specification to the ABS actuator and electric unit (control unit).

Refer to Work Procedure.

NOTE:

For details the network connection and operation, refer to “CONSULT Operation Manual”.

The configuration no need to “save” configuration data from the ABS actuator and electric unit (control unit). The configuration data is always generated freshly at the server and then downloaded to the CONSULT.

CAUTION:

• Complete the procedure of “Configuration” in order.

• If incorrect “Configuration”, incidents might occur.

• Never perform “Configuration” except for new ABS actuator and electric unit (control unit).

Work Procedure

WRITING VEHICLE SPECIFICATION

CONSULT

Perform writing Nissan Pathfinder vehicle specification to ABS actuator and electric unit (control unit) following "Automatic Configuration" procedure of "Configuration" according to CONSULT Operation Manual.

NOTE:

• Log in the network according to CONSULT guidance.

• For details the network connection and operation, refer to “CONSULT Operation Manual”.

>>

Work End.

Adjustment of Steering Angle Sensor Neutral Position Nissan Pathfinder SUV

Description

Always adjust the neutral position of steering angle sensor before driving when the following operation is performed. Refer to Work Procedure.

×: Required —: Not required

Procedure	Adjust the neutral position of steering angle sensor
Removing/ installing ABS actuator and electric unit (control unit)	—
Replacing ABS actuator and electric unit (control unit)	×
Removing/installing steering angle sensor	×
Replacing steering angle sensor	×
Removing/installing steering components	×
Replacing steering components	×
Removing/installing front suspension components	×
Replacing front suspension components	×
Removing/installing tire	—
Replacing tire	—
Tire rotation	—
Adjusting front wheel alignment.	×

Work Procedure

CAUTION:

Always use CONSULT when adjusting the neutral position of steering angle sensor. (It cannot be adjusted other than with CONSULT.)

CHECK THE VEHICLE STATUS (1)

Stop vehicle with front wheels in the straight-ahead position.

Does the Nissan Pathfinder vehicle stay in the straight-ahead position?

YES>>

GO TO 2.

NO>>

Steer the steering wheel to the straight-ahead position. Stop the Nissan Pathfinder vehicle.

ADJUST NEUTRAL POSITION OF STEERING ANGLE SENSOR

CONSULT

1. Ignition switch ON.

   CAUTION:

   Never start engine.

2. Select “ABS”, “Work support” and “ST ANGLE SENSOR ADJUSTMENT” in this order.

3. Select “START”.

   CAUTION:

   Never touch steering wheel while adjusting steering angle sensor.

4. After approximately 10 seconds, select “END”.

5. Ignition switch OFF (Auto ACC function OFF), and then it ON again.

   CAUTION:

   Be sure to perform the operation above.

>>

GO TO 3.

CHECK DATA MONITOR (1)

CONSULT

1. The Nissan Pathfinder vehicle is either pointing straight ahead, or the vehicle needs to be moved. Stop when it is pointing straight ahead.

2. Select “ABS”, "Data Monitor", and “Steering angle” in the order. Check that the signal is within the specified value. Refer to Reference Value.

Is the inspection result normal?

YES>>

GO TO 10.

NO>>

GO TO 4.

CHECK STEERING COMPONENT PARTS

Check the installation condition of steering component parts. Refer to Inspection.

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

Repair or replace error-detected parts. GO TO 5.

CHECK FRONT SUSPENSION COMPONENT PARTS

Check the installation condition of front suspension component parts. Refer to Inspection.

Is the inspection result normal?

YES>>

GO TO 6.

NO>>

Repair or replace error-detected parts. GO TO 6.

CHECK FRONT WHEEL ALIGNMENT

Check the front wheel alignment. Refer to Inspection.

Is the inspection result normal?

YES>>

GO TO 7.

NO>>

Adjust the front wheel alignment. Refer to Adjustment. GO TO 7.

CHECK THE Nissan Pathfinder Vehicle STATUS (2)

Stop vehicle with front wheels in the straight-ahead position.

Does the Nissan Pathfinder vehicle stay in the straight-ahead position?

YES>>

GO TO 8.

NO>>

Steer the steering wheel to the straight-ahead position. GO TO 8.

CHECK DATA MONITOR (2)

CONSULT

1. The Nissan Pathfinder vehicle is either pointing straight ahead, or the vehicle needs to be moved. Stop when it is pointing straight ahead.

2. Select “ABS”, "Data Monitor", and “Steering angle” in the order. Check that the signal is within the specified value. Refer to Reference Value.

Is the inspection result normal?

YES>>

GO TO 10.

NO>>

GO TO 9.

CHECK DATA MONITOR (3)

CONSULT

1. The Nissan Pathfinder vehicle is either pointing straight ahead, or the vehicle needs to be moved.

   CAUTION:

   • Drive the Nissan Pathfinder vehicle at approximately 19 MPH (30 km/h) or more for 985 ft (300 m) or more.

   • Never use tester

2. The Nissan Pathfinder vehicle is either pointing straight ahead, or the vehicle needs to be moved. Stop when it is pointing straight ahead.

3. Select “ABS”, "Data Monitor", and “Steering angle” in the order. Check that the signal is within the specified value. Refer to Reference Value.

Is the inspection result normal?

YES>>

GO TO 10.

NO>>

GO TO 1.

ERASE SELF-DIAGNOSIS MEMORY

CONSULT

1. Record or print self-diagnosis results and freeze frame data (FFD).

2. Erase self-diagnosis result of “ABS”.

Are the memories erased?

YES>>

GO TO 11.

NO>>

Check the items indicated by the self-diagnosis.

EPS LEARNING

1. Pull the parking brake switch.

   NOTE:

   Check the parking brake switch indicator is turn On.

2. Ignition switch OFF.

3. Get out of the Nissan Pathfinder vehicle and close all doors.

4. Wait 65 seconds.

   NOTE:

   • Check the parking brake switch indicator turn OFF.

   • If the rear brake caliper is heated, wait an hour so that parking brake switch indicator does not turn OFF.

5. Start the engine.

   CAUTION:

   Never drive the Nissan Pathfinder vehicle.

>>

End of work.

Calibration of Decel G Sensor Nissan Pathfinder 2022

Description

CAUTION:

Always perform the decel G sensor calibration before driving when the following operation is performed. Refer to Work Procedure.

×: Required —: Not required

Procedure	Decel G sensor calibration
Removing/ installing ABS actuator and electric unit (control unit)	×
Replacing ABS actuator and electric unit (control unit)	×
Removing/installing steering components	—
Replacing steering components	—
Removing/installing front suspension components	—
Replacing front suspension components	—
Removing/installing tire	—
Replacing tire	—
Tire rotation	—
Adjusting front wheel alignment.	—

Work Procedure

CAUTION:

Always use CONSULT for the decel G sensor calibration. (It cannot be adjusted other than with CONSULT.)

CHECK THE VEHICLE STATUS

1. Steer the steering wheel to the straight-ahead position. Stop the Nissan Pathfinder vehicle on level surface.

2. Stop the engine.

3. Ignition OFF (Auto ACC function OFF).

Is the Nissan Pathfinder vehicle stopped in the straight-ahead position on level surface?

YES>>

GO TO 2.

NO>>

Steer the steering wheel to the straight-ahead position. Stop the Nissan Pathfinder vehicle on level surface.

PERFORM DECEL G SENSOR CALIBRATION

CAUTION:

• Never allow passenger or load on the Nissan Pathfinder vehicle.

• Never apply vibration to the vehicle body when opening or closing door during calibration.

CONSULT

1. Ignition switch ON.

   CAUTION:

   Never start engine.

2. Select “ABS”, “Work support”, “DECEL G SENSOR CALIBRATION” in this order.

3. Select “START”.

4. After approximately 10 seconds, select “END”.

5. Ignition OFF (Auto ACC function OFF) and then it ON again.

   CAUTION:

   Be sure to perform the operation above.

>>

GO TO 3.

CHECK DATA MONITOR

CONSULT

1. Drive the Nissan Pathfinder vehicle. Steer the steering wheel to the straight-ahead position. Stop the vehicle on level surface.

2. Select “ABS”, "Data Monitor", and “Decel G sensor” in this order. Check that the signal is within the specified value. Refer to Reference Value.

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

GO TO 1.

ERASE SELF-DIAGNOSIS MEMORY

CONSULT

Erase self-diagnosis result of “ABS”.

Are the memories erased?

YES>>

End of work.

NO>>

Check the items indicated by the self-diagnosis.

Adjustment of Brake Caliper Initial Position Nissan Pathfinder SUV

Description

CAUTION:

When performing the following operations, always use CONSULT (It cannot be performed by any means other than CONSULT.), for performing "INITIALIZATION POSITION ADJUSTMENT" of "WORK SUPPORT". Refer to Work Procedure.

×: Required —: not required

Procedure	INITIALIZATION POSITION ADJUSTMENT
Removing/ installing ABS actuator and electric unit (control unit)	—
Replacing ABS actuator and electric unit (control unit)	×
Removing/ installing rear brake pad (When not pressing piston of rear brake caliper assembly)	—
Removing/ installing rear brake pad (When pressing piston of rear brake caliper assembly)	—
Replacing rear brake pad	×
Removing/ installing rear brake caliper assembly	—
Replacing rear brake caliper assembly	×
Removing/ installing parking brake switch	—
Replacing parking brake switch	—

Work Procedure

PERFORM INITIALIZATION POSITION ADJUSTMENT

1. Select "ABS", "Work support", and "INITIALIZATION POSITION ADJUSTMENT" according to this order.

   CAUTION:

   • Never operate the parking brake switch.

   • Never depress the brake pedal.

2. Press "START".

>>

GO TO 2.

PERFORM THE SELF-DIAGNOSIS

With CONSULT

1. Ignition OFF (Auto ACC function OFF) to ON.

2. Erase self-diagnosis results memory of "ABS".

3. Pull parking brake switch to activate electric parking brake.

4. Push parking brake switch to release electric parking brake.

5. Select self-diagnosis for “ABS”.

Is malfunction detected?

YES>>

Check the DTC. Refer to DTC Index.

NO>>

Inspection End.

Removal/replacement of Rear Brake Pad or Rear Brake Caliper Nissan Pathfinder 5th Gen

Description

CAUTION:

When performing the following operations, always use CONSULT, for performing “START BRAKE PAD REPLACEMENT”, “FINISH BRAKE PAD REPLACEMENT”, “INITIALIZATION POSITION ADJUSTMENT” of “Work support”. Refer to Work Procedure.

×: Required —: not required

Procedure	START BRAKE PAD REPLACEMENT FINISH BRAKE PAD REPLACEMENT INITIALIZATION POSITION ADJUSTMENT
Removing/installing ABS actuator and electric unit (control unit)	—
Replacing ABS actuator and electric unit (control unit)	—
Removing/installing rear brake pad (When not pressing piston of rear brake caliper assembly)	—
Removing/installing rear brake pad (When pressing piston of rear brake caliper assembly)	×
Replacing rear brake pad	×
Removing/installing rear brake caliper assembly	—
Replacing rear brake caliper assembly	×
Removing/installing parking brake switch	—
Replacing parking brake switch	—

Work Procedure

BEFORE REMOVAL/REPLACEMENT OF REAR BRAKE PAD OR REAR CALIPER ASSEMBLY

CONSULT

1. Ignition OFF (Auto ACC function OFF) to ON.

   CAUTION:

   Never start the engine.

2. Select “ABS”, “Work support”, and “START BRAKE PAD REPLACEMENT” according to this order.

   CAUTION:

   • Never operate the parking brake switch.

   • Never depress the brake pedal.

3. Touch “START”.

>>

GO TO 2.

REMOVAL AND INSTALLATION/REPLACEMENT OF REAR BRAKE PAD OR REAR BRAKE CALIPER ASSEMBLY

Replace the rear brake pad or rear brake caliper.

• Rear brake pad: Refer to Removal and Installation.

• Rear brake caliper assembly: Refer to Removal and Installation.

>>

GO TO 3.

AFTER INSTALLATION/REPLACEMENT OF REAR BRAKE PAD OR REAR CALIPER ASSEMBLY

CONSULT

1. Select “ABS”, “Work support”, and “FINISH BRAKE PAD REPLACEMENT” according to this order.

   CAUTION:

   • Never operate the parking brake switch.

   • Never depress the brake pedal.

2. Touch “START”.

>>

GO TO 4.

PERFORM INITIALIZATION POSITION ADJUSTMENT

CONSULT

1. Select “ABS”, “Work support”, and “INITIALIZATION POSITION ADJUSTMENT” according to this order.

   CAUTION:

   • Never operate the parking brake switch.

   • Never depress the brake pedal.

2. Touch “START”.

>>

GO TO 5.

PERFORM THE SELF-DIAGNOSIS

CONSULT

1. Pull parking brake switch to activate electric parking brake.

2. Push parking brake switch to release electric parking brake.

3. Select self-diagnosis for “ABS”.

Is malfunction detected?

YES>>

Check the DTC. Refer to DTC Index. GO TO 6.

NO>>

GO TO 6.

CHECK DATA MONITOR

CONSULT

Select “ABS”, “Data Monitor”, “BR FORCE EST (LH)” and “BR FORCE EST (RH)” according to this order. Check that signals are within the specified value. Refer to Reference Value.

Is the check result normal?

YES>>

GO TO 7.

NO>>

GO TO 1.

ERASE SELF-DIAGNOSIS MEMORY

CONSULT

1. Ignition OFF (Auto ACC function OFF) to ON.

2. Erase self-diagnosis results memory of “ABS”.

Is the memory erased?

YES>>

Inspection End.

NO>>

Check the items indicated by the self-diagnosis.

Change of System Mode Nissan Pathfinder SUV

Description

CAUTION:

When the following operations are performed, always use CONSULT, for performing “SYSTEM MODE CHANGE” of “WORK SUPPORT”. Refer to Work Procedure.

×: Required —: not required

Procedure	SYSTEM MODE CHANGE
Removing/installing ABS actuator and electric unit (control unit)	—
Replacing ABS actuator and electric unit (control unit)	×
Removing/installing rear brake pad (When not pressing piston of rear brake caliper assembly)	—
Replacing rear brake caliper assembly	—
Removing/installing parking brake switch	—
Replacing parking brake switch	—

Work Procedure

CAUTION:

When performing the following operations, always use CONSULT. (It cannot be performed by any means other than CONSULT.)

• Replacing ABS actuator and electric unit (control unit)

CHANGE OF SYSTEM MODE

CONSULT

1. Select “ABS”, “WORK SUPPORT”, and “SYSTEM MODE CHANGE” according to this order.

   CAUTION:

   Never operate the parking brake switch.

2. Touch “START”.

3. Check display item “FACTORY MODE”.

Is the inspection result “Off”?

YES>>

GO TO 2.

NO>>

Perform change of system mode again.

PERFORM THE SELF-DIAGNOSIS

CONSULT

1. Pull parking brake switch to activate electric parking brake.

2. Push parking brake switch to release electric parking brake.

3. Perform self-diagnosis for “ABS”.

Is malfunction detected?

YES>>

Check the DTC. Refer to DTC Index.

NO>>

Inspection End