Nissan Leaf. Manual - part 291

THE BRAKING DISTANCE IS LONG

BR-485

< SYMPTOM DIAGNOSIS >

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3. Disconnect 12V battery cable from negative terminal. Refer to 

BR-6, "Precaution for Removing 12V Bat-

tery"

.

4. Disconnect the electrically-driven intelligent brake unit harness connector.

5. Check the continuity between electrically-driven intelligent brake unit and ground.

Is the inspection result normal?

YES

>> GO TO 13.

NO

>> Repair or replace error-detected parts and GO TO 12.

12.

PERFORM SELF-DIAGNOSIS (5)

With CONSULT

1. Connect the electrically-driven intelligent brake unit harness connector.

2. Connect 12V battery cable to negative terminal.

3. Turn the power switch OFF to ON without depressing the brake pedal.

CAUTION:

Never set the vehicle to READY.

4. Repeat step 3 two or more times.

CAUTION:

Be sure to wait for 5 seconds or more after turning the power switch OFF.

5. Turn the power switch OFF to exit CONSULT, and disconnect CONSULT from data link connector.

6. Close all doors (including back door), check that the room lamp is OFF, get out of the vehicle, and wait for

3 minutes or more with all doors closed.

CAUTION:

Never operate the vehicle while waiting.

7. Turn the power switch ON without depressing the brake pedal.

CAUTION:

Never set the vehicle to READY.

8. Start CONSULT and erase self-diagnosis result of “BRAKE”.

9. Turn the power switch OFF to exit CONSULT, and disconnect CONSULT from data link connector.

10. Close all doors (including back door), check that the room lamp is OFF, get out of the vehicle, and wait for

3 minutes or more with all doors closed.

CAUTION:

Never operate the vehicle while waiting.

11. Turn the power switch ON without depressing the brake pedal.

CAUTION:

Never set the vehicle to READY.

12. Depress brake pedal by 100 mm (3.94 in) or more, and hold the position for 5 seconds or more.

13. Release brake pedal.

14. Start CONSULT and perform “BRAKE” self-diagnosis.
Is any DTC detected?

YES

>> Check the DTC. Refer to 

BR-38, "DTC Index"

. GO TO 13.

NO

>> INSPECTION END

13.

CHECK DATA MONITOR

With CONSULT

1. Connect the electrically-driven intelligent brake unit harness connector.

2. Connect 12V battery cable to negative terminal.

3. Turn the power switch OFF to ON without depressing the brake pedal.

CAUTION:

Never set the vehicle to READY.

4. Repeat step 3 two or more times.

CAUTION:

Be sure to wait for 5 seconds or more after turning the power switch OFF.

5. Start CONSULT and select “BRAKE” and “DATA MONITOR” according this order.

6. Check the “MOTOR POWER SUPPLY” and “CONTROL MODULE POWER”. Refer to 

BR-33, "Reference

Value"

.

Electrically-driven intelligent brake unit

—

Continuity

Connector

Terminal

E34

32

Ground

Existed

BR-486

< SYMPTOM DIAGNOSIS >

THE BRAKING DISTANCE IS LONG

Is the inspection result normal?

YES

>> GO TO 14.

NO

>> Replace the electrically-driven intelligent brake unit. Refer to 

BR-510, "Removal and installation"

.

14.

PERFORM SELF-DIAGNOSIS (6)

With CONSULT

1. Turn the power switch OFF to ON without depressing the brake pedal.

CAUTION:

Never set the vehicle to READY.

2. Repeat step 1 two or more times.

CAUTION:

Be sure to wait for 5 seconds or more after turning the power switch OFF.

3. Turn the power switch OFF to exit CONSULT, and disconnect CONSULT from data link connector.

4. Close all doors (including back door), check that the room lamp is OFF, get out of the vehicle, and wait for

3 minutes or more with all doors closed.

CAUTION:

Never operate the vehicle while waiting.

5. Turn the power switch ON without depressing the brake pedal.

CAUTION:

Never set the vehicle to READY.

6. Start CONSULT and erase self-diagnosis result of “BRAKE”.

7. Turn the power switch OFF to exit CONSULT, and disconnect CONSULT from data link connector.

8. Close all doors (including back door), check that the room lamp is OFF, get out of the vehicle, and wait for

3 minutes or more with all doors closed.

CAUTION:

Never operate the vehicle while waiting.

9. Turn the power switch ON without depressing the brake pedal.

CAUTION:

Never set the vehicle to READY.

10. Depress brake pedal by 100 mm (3.94 in) or more, and hold the position for 5 seconds or more.

11. Release brake pedal.

12. Start CONSULT and perform “BRAKE” self-diagnosis.
Is any DTC detected?

YES

>> Check the DTC. Refer to 

BR-38, "DTC Index"

.

NO

>> GO TO 15.

15.

CHECK BRAKING FORCE

Check the braking force.
Is the inspection result normal?

YES

>> GO TO 16.

NO

>> Check each component of brake system.

16.

CHECK BRAKE PERFORMANCE

1. Turn the power switch OFF to exit CONSULT.

2. Disconnect ABS actuator control unit harness connector so that ABS does not operate. Check the brake

stopping distance in this condition.

3. Connect harness connectors after checking.
Is the inspection result normal?

YES

>> Normal

NO

>> Check each component of brake system.

VEHICLE JERKS DURING

BR-487

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VEHICLE JERKS DURING

Description

INFOID:0000000010123114

The vehicle jerks when VDC function, TCS function, ABS function, EBD function, brake limited slip differential

(BLSD) function or brake assist function operates.

Diagnosis Procedure

INFOID:0000000010123115

1.

CHECK SYMPTOM

Check the whether or not the vehicle jerks when VDC function, TCS function, ABS function, EBD function,

brake limited slip differential (BLSD) function or brake assist function operates.
Is the inspection result normal?

YES

>> Normal

NO

>> GO TO 2.

2.

PERFORM SELF-DIAGNOSIS

With CONSULT

1. Turn the power switch OFF to ON without depressing the brake pedal.

CAUTION:

Never set the vehicle to READY.

2. Repeat step 1 two or more times.

CAUTION:

Be sure to wait for 5 seconds or more after turning the power switch OFF.

3. Turn the power switch OFF to exit CONSULT, and disconnect CONSULT from data link connector.

4. Close all doors (including back door), check that the room lamp is OFF, get out of the vehicle, and wait for

3 minutes or more with all doors closed.

CAUTION:

Never operate the vehicle while waiting.

5. Turn the power switch ON without depressing the brake pedal.

CAUTION:

Never set the vehicle to READY.

6. Start CONSULT and erase self-diagnosis result of “BRAKE”.

7. Turn the power switch OFF to exit CONSULT, and disconnect CONSULT from data link connector.

8. Close all doors (including back door), check that the room lamp is OFF, get out of the vehicle, and wait for

3 minutes or more with all doors closed.

CAUTION:

Never operate the vehicle while waiting.

9. Turn the power switch ON without depressing the brake pedal.

CAUTION:

Never set the vehicle to READY.

10. Depress brake pedal by 100 mm (3.94 in) or more, and hold the position for 5 seconds or more.

11. Release brake pedal.

12. Start CONSULT and perform “BRAKE” self-diagnosis.
Is any DTC detected?

YES

>> Check the DTC. Refer to 

BR-38, "DTC Index"

.

NO

>> Perform symptom diagnosis for VDC function, TCS function, ABS function, EBD function, brake

limited slip differential (BLSD) function, or brake assist function. Refer to 

BRC-155, "Diagnosis

Procedure"

. GO TO 3.

3.

CHECK CONNECTOR

With CONSULT

1. Turn the power switch OFF to exit CONSULT, and disconnect CONSULT from data link connector.

2. Close all doors (including back door), check that the room lamp is OFF, get out of the vehicle, and wait for

3 minutes or more with all doors closed.

CAUTION:

Never operate the vehicle while waiting.

3. Disconnect 12V battery cable from negative terminal. Refer to 

BR-6, "Precaution for Removing 12V Bat-

tery"

.

BR-488

< SYMPTOM DIAGNOSIS >

VEHICLE JERKS DURING

4. Disconnect electrically-driven intelligent brake unit harness connector.

5. Disconnect ABS actuator and electric unit (control unit) harness connector.

6. Check the connector terminal for deformation, disconnection, or looseness.

7. Connect electrically-driven intelligent brake unit harness connector.

8. Connect ABS actuator and electric unit (control unit) harness connector.

9. Connect harness connector, start CONSULT and 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.

4.

CHECK VCM SELF DIAGNOSIS RESULT ITEMS

With CONSULT

Start CONSULT and perform self-diagnosis for “EV/HEV”. Refer to 

EVC-72, "CONSULT Function"

.

Is any DTC detected?

YES

>> Check the DTC. Refer to 

EVC-102, "DTC Index"

.

NO

>> Replace ABS actuator and electric unit (control unit). Refer to 

BRC-164, "Removal and Installa-

tion"

.