Nissan Ariya: Symptom Diagnosis

Nissan Ariya (FE0) 2023-2025 Service & Repair Manual / Brakes / Brake System / Symptom Diagnosis

Noise, Vibration and Harshness (nvh) Troubleshooting
Unexpected Brake Pedal Reaction
The Braking Distance Is Long
Vehicle Jerks During
Normal Operating Condition

Noise, Vibration and Harshness (nvh) Troubleshooting

NVH Troubleshooting Chart

Use the chart below to find the cause of the symptom. If necessary, repair or replace these parts.

Possible cause and suspected parts	Symptom			Reference
	BRAKE
	Noise	Shake	Shimmy, Judder
Pads or lining damaged	×	—	—	Periodic Maintenance Operation, Periodic Maintenance Operation .
Pads or lining uneven wear	×	—	—	Periodic Maintenance Operation, Periodic Maintenance Operation.
Shims damaged	×	—	—	Inspection, Inspection.
Rotor imbalance	—	×	×	Periodic Maintenance Operation , Periodic Maintenance Operation, Periodic Maintenance Operation, Periodic Maintenance Operation.
Rotor or drum damage	—	—	×	Periodic Maintenance Operation , Periodic Maintenance Operation, Periodic Maintenance Operation, Periodic Maintenance Operation,
Rotor runout	—	—	×	Periodic Maintenance Operation, Periodic Maintenance Operation.
Rotor deformation	—	—	×	Periodic Maintenance Operation, Periodic Maintenance Operation.
Rotor or drum deflection	—	—	×	Periodic Maintenance Operation, Periodic Maintenance Operation.
Rotor rust	—	—	×	Periodic Maintenance Operation, Periodic Maintenance Operation.
Rotor thickness variation	—	—	×	Periodic Maintenance Operation , Periodic Maintenance Operation, Periodic Maintenance Operation, Periodic Maintenance Operation.
Drum out of round	—	—	—	, NVH Troubleshooting Chart.
PROPELLER SHAFT	×	×	—	NVH in DLN section
DIFFERENTIAL	×	—	—	NHV in DLN section
AXLE AND SUSPENSION	×	×	×	NVH in FAX, RAX and FSU, RSU section
TIRE	×	×	×	NVH in WT section
ROAD WHEEL	×	×	×	NVH in WT section
DRIVE SHAFT	×	×	—	NVH in FAX section
STEERING	×	×	×	NVH in ST section

×: Applicable, —: Not applicable

Unexpected Brake Pedal Reaction

Diagnosis Procedure

A malfunction of brake pedal feel (height or others) is detected when the brake pedal is depressed.

CHECK AXLE

Check that there is no significant looseness of axle.

Front axle: Refer to FRONT WHEEL HUB AND KNUCKLE : Periodic Maintenance Operation.
Rear axle: Refer to REAR WHEEL HUB : Periodic Maintenance Operation.

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Repair or replace error-detected parts.

CHECK DISC ROTOR

Check the disc rotor runout.

Front: Refer to FRONT DISC ROTOR : Periodic Maintenance Operation.
Rear: Refer to REAR DISC ROTOR : Periodic Maintenance Operation.

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Grind or replace rotor.

CHECK BRAKE FLUID LEAKAGE

Check the brake fluid leakage.

Front: Refer to FRONT BRAKE PIPING : Inspection.
Rear: Refer to REAR BRAKE PIPING : Inspection.

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair or replace error-detected parts.

CHECK BRAKE PEDAL

Check the brake pedal items. Refer to BRAKE PEDAL : Periodic Maintenance Operation.

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

Adjust the brake pedal items. Refer to BRAKE PEDAL : Periodic Maintenance Operation.

CHECK BRAKING FORCE

Check the braking force.

Is the inspection result normal?

YES>>

GO TO 6.

NO>>

Check each component of brake system.

CHECK BRAKE PERFORMANCE

Disconnect ABS actuator and electric unit (control unit) connector so that ABS does not operate. Check that brake force is normal in this condition. Connect harness connectors after checking.

Is the inspection result normal?

YES>>

Normal

NO>>

Check each component of brake system.

The Braking Distance Is Long

Diagnosis Procedure

Brake stopping distance is long when ABS function is operated.

CAUTION:

Brake stopping distance on slippery road like rough road, gravel road, or snowy road may become longer when ABS is operated than when ABS is not operated.

CHECK 12V BATTERY

Power switch OFF and disconnect CONSULT from data link connector.
Get out of the Nissan Ariya vehicle, close all doors (other than hood assembly), check that the combination meter is OFF, and wait for 1 minute or more without opening these doors.

CAUTION:
Never operate the Nissan Ariya vehicle.
Check the 12V battery terminal connections.
Check the 12V battery.

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Repair or replace error-detected parts. GO TO 2.

PERFORM SELF-DIAGNOSIS (1)

With CONSULT

Connect 12V battery cable to negative terminal.
Power switch OFF to ON without depressing the brake pedal.

CAUTION:
Never set the Nissan Ariya vehicle to READY.
Power switch OFF and disconnect CONSULT from data link connector.
Get out of the Nissan Ariya vehicle, close all doors (other than hood assembly), check that the combination meter is OFF, and wait for 1 minute or more without opening these doors.

CAUTION:
Never operate the Nissan Ariya vehicle.
Power switch ON without depressing the brake pedal.

CAUTION:
Never set the Nissan Ariya vehicle to READY.
Erase self-diagnosis result for “BRAKE”.
Power switch OFF and disconnect CONSULT from data link connector.
Get out of the Nissan Ariya vehicle, close all doors (other than hood assembly), check that the combination meter is OFF, and wait for 1 minute or more without opening these doors.

CAUTION:
Never operate the Nissan Ariya vehicle.
Power switch ON without depressing the brake pedal.

CAUTION:
Never set the Nissan Ariya vehicle to READY.
Perform self-diagnosis for “BRAKE”.

Is DTC detected?

YES>>

Check the DTC. Refer to DTC Index. GO TO 3.

NO>>

INSPECTION END

CHECK CONNECTOR TERMINALS

Power switch OFF and disconnect CONSULT from data link connector.
Get out of the Nissan Ariya vehicle, close all doors (other than hood assembly), check that the combination meter is OFF, and wait for 1 minute or more without opening these doors.

CAUTION:
Never operate the Nissan Ariya vehicle.
Disconnect 12V battery cable from negative terminal.
Disconnect the electrically-driven intelligent brake unit harness connector, then check for malfunctions of terminals and connections.

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

Repair / replace harness, connector, or terminal. GO TO 4.

PERFORM SELF-DIAGNOSIS (2)

With CONSULT

Connect the electrically-driven intelligent brake unit harness connector.
Connect 12V battery cable to negative terminal.
Power switch OFF to ON without depressing the brake pedal.

CAUTION:
Never set the Nissan Ariya vehicle to READY.
Power switch OFF and disconnect CONSULT from data link connector.
Get out of the Nissan Ariya vehicle, close all doors (other than hood assembly), check that the combination meter is OFF, and wait for 1 minute or more without opening these doors.

CAUTION:
Never operate the Nissan Ariya vehicle.
Power switch ON without depressing the brake pedal.

CAUTION:
Never set the Nissan Ariya vehicle to READY.
Erase self-diagnosis result for “BRAKE”.
Power switch OFF and disconnect CONSULT from data link connector.
Get out of the Nissan Ariya vehicle, close all doors (other than hood assembly), check that the combination meter is OFF, and wait for 1 minute or more without opening these doors.

CAUTION:
Never operate the Nissan Ariya vehicle.
Power switch ON without depressing the brake pedal.

CAUTION:
Never set the Nissan Ariya vehicle to READY.
Perform self-diagnosis for “BRAKE”.

Is any DTC detected?

YES>>

Check the DTC. Refer to DTC Index. GO TO 5.

NO>>

INSPECTION END

CHECK ELECTRICALLY-DRIVEN INTELLIGENT BRAKE UNIT POWER SWITCH ON POWER SUPPLY AND GROUND CIRCUIT

Power switch OFF and disconnect CONSULT from data link connector.
Get out of the Nissan Ariya vehicle, close all doors (other than hood assembly), check that the combination meter is OFF, and wait for 1 minute or more without opening these doors.

CAUTION:
Never operate the Nissan Ariya vehicle.
Disconnect 12V battery cable from negative terminal.
Disconnect the electrically-driven intelligent brake unit harness connector.
Perform the trouble diagnosis for electrically-driven intelligent brake unit power supply and ground circuit. Refer to Diagnosis Procedure.

Is the inspection result normal?

YES>>

GO TO 6.

NO>>

Repair / replace harness, connector, terminal, fuse, or fusible link. GO TO 6.

PERFORM SELF-DIAGNOSIS (3)

With CONSULT

Power switch OFF to ON without depressing the brake pedal.

CAUTION:
Never set the Nissan Ariya vehicle to READY.
Power switch OFF and disconnect CONSULT from data link connector.
Get out of the Nissan Ariya vehicle, close all doors (other than hood assembly), check that the combination meter is OFF, and wait for 1 minute or more without opening these doors.

CAUTION:
Never operate the Nissan Ariya vehicle.
Power switch ON without depressing the brake pedal.

CAUTION:
Never set the Nissan Ariya vehicle to READY.
Erase self-diagnosis result for “BRAKE”.
Power switch OFF and disconnect CONSULT from data link connector.
Get out of the Nissan Ariya vehicle, close all doors (other than hood assembly), check that the combination meter is OFF, and wait for 1 minute or more without opening these doors.

CAUTION:
Never operate the Nissan Ariya vehicle.
Power switch ON without depressing the brake pedal.

CAUTION:
Never set the Nissan Ariya vehicle to READY.
Perform self-diagnosis for “BRAKE”.

Is any DTC detected?

YES>>

Check the DTC. Refer to DTC Index. GO TO 7.

NO>>

INSPECTION END

CHECK BRAKING FORCE

Check the braking force.

Is the inspection result normal?

YES>>

GO TO 8.

NO>>

Check each component of brake system.

CHECK BRAKE PERFORMANCE

Power switch OFF and disconnect CONSULT from data link connector.
Disconnect ABS actuator control unit harness connector so that ABS does not operate. Check the brake stopping distance in this condition.
Connect ABS actuator and electric unit (control unit) harness connector.

Is the inspection result normal?

YES>>

Normal

NO>>

Check each component of brake system.

Vehicle Jerks During

Diagnosis Procedure

The vehicle jerks when VDC function, TCS function, ABS function, EBD function, hill start assist function, brake limited slip differential (BLSD) function, brake assist function, brake force distribution function, or trailer sway control function operates.

CHECK SYMPTOM

Check the whether or not the vehicle jerks when VDC function, TCS function, ABS function, EBD function, hill start assist function, brake limited slip differential (BLSD) function, brake assist function, brake force distribution function, or trailer sway control function operates.

Is the inspection result normal?

YES>>

Normal

NO>>

GO TO 2.

PERFORM SELF-DIAGNOSIS

With CONSULT

Power switch OFF to ON without depressing the brake pedal.

CAUTION:
Never set the Nissan Ariya vehicle to READY.
Power switch OFF and disconnect CONSULT from data link connector.
Get out of the Nissan Ariya vehicle, close all doors (other than hood assembly), check that the combination meter is OFF, and wait for 1 minute or more without opening these doors.

CAUTION:
Never operate the Nissan Ariya vehicle.
Power switch ON without depressing the brake pedal.

CAUTION:
Never set the Nissan Ariya vehicle to READY.
Erase self-diagnosis result for “BRAKE”.
Power switch OFF and disconnect CONSULT from data link connector.
Get out of the Nissan Ariya vehicle, close all doors (other than hood assembly), check that the combination meter is OFF, and wait for 1 minute or more without opening these doors.

CAUTION:
Never operate the Nissan Ariya vehicle.
Power switch ON without depressing the brake pedal.

CAUTION:
Never set the Nissan Ariya vehicle to READY.
Perform self-diagnosis for “BRAKE”.

Is any DTC detected?

YES>>

Check the DTC. Refer to DTC Index.

NO>>

Perform symptom diagnosis for VDC function, TCS function, ABS function, EBD function, hill start assist function, brake limited slip differential (BLSD) function, brake assist function, brake force distribution function, or trailer sway control function. Refer to Diagnosis Procedure. GO TO 3.

CHECK CONNECTOR

With CONSULT

Power switch OFF and disconnect CONSULT from data link connector.
Get out of the Nissan Ariya vehicle, close all doors (other than hood assembly), check that the combination meter is OFF, and wait for 1 minute or more without opening these doors.

CAUTION:
Never operate the Nissan Ariya vehicle.
Disconnect 12V battery cable from negative terminal.
Disconnect electrically-driven intelligent brake unit harness connector.
Disconnect ABS actuator and electric unit (control unit) harness connector.
Check the connector terminal for deformation, disconnection, or looseness.
Connect electrically-driven intelligent brake unit harness connector.
Connect ABS actuator and electric unit (control unit) harness connector.
Perform self-diagnosis for “BRAKE” again.

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Poor connection of connector terminal. Repair or replace connector terminal.

CHECK VCM SELF DIAGNOSIS RESULT ITEMS

With CONSULT

Perform self-diagnosis for “EV/HEV”.

Is any DTC detected?

YES>>

Check the DTC. Refer to DTC Index.

NO>>

Replace ABS actuator and electric unit (control unit). Refer to ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) : Removal & Installation.

Normal Operating Condition

Symptom Description

Symptom	Result
The brake pedal may move during braking.	This occurs when the electrically-driven intelligent brake unit is operating normally and is not a malfunction.
When the brake pedal is depressed while the power switch is OFF, an operating sound may occur or the pedal stroke may feel short.
There may be an operating noise or the brake pedal may move after the brake pedal is operated.
An operating noise may occur when the power switch is turned OFF (system stop sound).
The brake pedal may move when ABS is activated immediately after the READY state of the Nissan Ariya vehicle.
After turning the power switch OFF and waiting for a few minutes in the car (with all doors closed and brake pedal not depressed), the electrically-driven intelligent brake unit goes into sleep mode. If the brake pedal is depressed after the unit goes into sleep mode, the brake pedal operation may be felt awkward or the depth of pedal depression insufficient for a little while.	This is not a malfunction. Depress the brake pedal fully.