Nissan Rogue (T33) 2021-Present Service Manual: Dtc/circuit Diagnosis :: B14e6-85 Brake Control System

Nissan Rogue (T33) 2021-Present Service Manual / Brakes :: Brake System / Dtc/circuit Diagnosis :: B14e6-85 Brake Control System

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
B14E6 85 Brake control system 1 Diagnosis condition When Ignition switch is ON.
Signal (terminal) Braking force request signal
Threshold When a malfunction is detected in braking force request from ABS actuator and electric unit (control unit).
Diagnosis delay time 1 second or less
2 Diagnosis condition When Ignition switch is ON.
Signal (terminal) Braking force request signal
Threshold When a malfunction is detected in braking force request from chassis control module.
Diagnosis delay time 1 second or less
3 Diagnosis condition When Ignition switch is ON.
Signal (terminal) Braking force request signal
Threshold When a malfunction is detected in braking force request from ADAS control unit 2.
Diagnosis delay time 1 second or less

POSSIBLE CAUSE

  • ABS actuator and electric unit (control unit)

  • ADAS control unit 2

  • Chassis control module

FAIL-SAFE

Normal control

Confirmation Procedure

PRECONDITIONING

If “Confirmation Procedure” has been previously conducted, always Ignition switch OFF, 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.

>>

GO TO 2.

CHECK DTC DETECTION

CONSULT

  1. Ignition switch OFF to ON without depressing the brake pedal.

  2. Ignition switch OFF and disconnect CONSULT from data link connector.

  3. 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.

  4. Ignition switch ON without depressing the brake pedal.

  5. Erase self-diagnosis result for “BRAKE”.

  6. Ignition switch OFF and disconnect CONSULT from data link connector.

  7. 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.

  8. Ignition switch ON without depressing the brake pedal.

  9. Perform self-diagnosis for “BRAKE”.

Is DTC “B14E6-85" detected?

YES>>

Refer to DTC Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to INTERMITTENT INCIDENT.

NO-2>>

Confirmation after repair: Inspection End.

DTC Diagnosis Procedure

CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) SYSTEM

Perform self-diagnosis for “ABS”.

Is DTC detected?

YES>>

Check the DTC. Refer to DTC Index.

NO>>

GO TO 2.

CHECK ADAS CONTROL UNIT 2 SYSTEM

Perform self-diagnosis for “ICC/ADAS 2”.

Is DTC detected?

YES>>

Check the DTC. Refer to DTC Index.

NO>>

GO TO 3.

CHECK CHASSIS CONTROL MODULE SYSTEM

Perform self-diagnosis for “CHASSIS CONTROL”.

Is DTC detected?

YES>>

Check the DTC. Refer to DTC Index.

NO>>

GO TO 4.

PERFORM SELF-DIAGNOSIS (1)

CONSULT

  1. Ignition switch OFF to ON without depressing the brake pedal.

  2. Ignition switch OFF and disconnect CONSULT from data link connector.

  3. 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.

  4. Ignition switch ON without depressing the brake pedal.

  5. Erase self-diagnosis result for “BRAKE” after record or print self-diagnosis results and freeze frame data (FFD).

  6. Ignition switch OFF and disconnect CONSULT from data link connector.

  7. 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.

  8. Ignition switch ON without depressing the brake pedal.

  9. Perform self-diagnosis for “BRAKE”.

Is DTC "B14E6-85" detected?

YES>>

GO TO 5.

NO>>

Inspection End.

CHECK 12V BATTERY

  1. Ignition switch OFF and disconnect CONSULT from data link connector.

  2. 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.

  3. Check the 12V battery terminal connections.

  4. Check the 12V battery.

Is the inspection result normal?

YES>>

GO TO 6.

NO>>

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

PERFORM SELF-DIAGNOSIS (2)

CONSULT

  1. Connect 12V battery cable to negative terminal.

  2. Ignition switch OFF to ON without depressing the brake pedal.

  3. Ignition switch OFF and disconnect CONSULT from data link connector.

  4. 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.

  5. Ignition switch OFF to ON without depressing the brake pedal.

  6. Erase self-diagnosis result for “BRAKE” after record or print self-diagnosis results and freeze frame data (FFD).

  7. Ignition switch OFF and disconnect CONSULT from data link connector.

  8. 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.

  9. Ignition switch OFF to ON without depressing the brake pedal.

  10. Perform self-diagnosis for “BRAKE”.

Is DTC "B14E6-85" detected?

YES>>

GO TO 7.

NO>>

Inspection End.

CHECK CONNECTOR TERMINALS

  1. Ignition switch OFF and disconnect CONSULT from data link connector.

  2. 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.

  3. Disconnect 12V battery cable from negative terminal.

  4. Disconnect Electrically-driven Intelligent Brake Unit harness connector, then check for malfunctions of terminals and connections.

Is the inspection result normal?

YES>>

GO TO 9.

NO>>

Repair / replace harness, connector, or terminal. GO TO 8.

PERFORM SELF-DIAGNOSIS (3)

CONSULT

  1. Connect Electrically-driven Intelligent Brake Unit harness connector.

  2. Connect 12V battery cable to negative terminal.

  3. Ignition switch OFF to ON without depressing the brake pedal.

  4. Ignition switch OFF and disconnect CONSULT from data link connector.

  5. 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.

  6. Ignition switch OFF to ON without depressing the brake pedal.

  7. Erase self-diagnosis result for “BRAKE” after record or print self-diagnosis results and freeze frame data (FFD).

  8. Ignition switch OFF and disconnect CONSULT from data link connector.

  9. 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.

  10. Ignition switch OFF to ON without depressing the brake pedal.

  11. Perform self-diagnosis for “BRAKE”.

Is DTC "B14E6-85" detected?

YES>>

GO TO 9.

NO>>

Inspection End.

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

  1. Ignition switch OFF and disconnect CONSULT from data link connector.

  2. 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.

  3. Disconnect 12V battery cable from negative terminal.

  4. Disconnect Electrically-driven Intelligent Brake Unit harness connector.

  5. Check the Electrically-driven Intelligent Brake Unit power supply and ground circuit. Refer to Diagnosis Procedure.

Is the inspection result normal?

YES>>

GO TO 10.

NO>>

Repair / replace harness, connector, terminal, fuse, or fusible link. GO TO 10.

PERFORM SELF-DIAGNOSIS (4)

CONSULT

  1. Ignition switch OFF to ON without depressing the brake pedal.

  2. Ignition switch OFF and disconnect CONSULT from data link connector.

  3. 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.

  4. Ignition switch OFF to ON without depressing the brake pedal.

  5. Erase self-diagnosis result for “BRAKE” after record or print self-diagnosis results and freeze frame data (FFD).

  6. Ignition switch OFF and disconnect CONSULT from data link connector.

  7. 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.

  8. Ignition switch OFF to ON without depressing the brake pedal.

  9. Perform self-diagnosis for “BRAKE”.

Is DTC "B14E6-85" detected?

YES ("B14E6-85")>>

Refer to ELECTRICALLY-DRIVEN INTELLIGENT BRAKE UNIT : Removal & Installation.

YES (Other than "B14E6-85")>>

Check the DTC. Refer to DTC Index.

NO>>

Inspection End.

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