Nissan Leaf. Manual - part 341

BRC-154

< SYMPTOM DIAGNOSIS >

[WITH VDC]

BRAKE PEDAL VIBRATION OR OPERATION SOUND OCCURS

BRAKE PEDAL VIBRATION OR OPERATION SOUND OCCURS

Description

INFOID:0000000010120129

• Brake pedal vibrates and motor sound from ABS actuator and electric unit (control unit) occurs, when the

traction motor starts.

• Brake pedal vibrates during braking.

CAUTION:

Vibration may be felt during brake pedal is lightly depressed (just placing a foot on it) in the following

conditions. This is normal.

• When shifting gears

• When driving on slippery road

• During cornering at high speed

• When passing over bumps or grooves [Approx. 50 mm (1.97 in) or more]

• When pulling away just after starting READY status [at approx. 10 km/h (6.2 MPH) or higher]

Diagnosis Procedure

INFOID:0000000010120130

1.

SYMPTOM CHECK 1

Check that there are pedal vibrations when the vehicle to READY.
Do vibrations occur?

YES

>> GO TO 2.

NO

>> Check brake pedal. Refer to 

BR-490, "Inspection and Adjustment"

.

2.

SYMPTOM CHECK 2

Check that motor noise from ABS actuator and electric unit (control unit) occurs when the vehicle to READY.
Does the operation sound occur?

YES

>> GO TO 3.

NO

>> GO TO 4.

3.

SYMPTOM CHECK 3

Check symptoms when electrical component (headlamps, etc.) switches are operated.
Does the symptom occur?

YES

>> Check that radio (including wiring), antenna and antenna lead-in wires are not located near ABS

actuator and electric unit (control unit). Move them if they are located near ABS actuator and elec-

tric unit (control unit).

NO

>> GO TO 4.

4.

PERFORM SELF DIAGNOSTIC

With CONSULT

1. Turn the power switch OFF 

→ ON.

CAUTION:

• Be sure to wait of 10 seconds after turning power switch OFF or ON.

• Set the vehicle to READY.

2. Repeat step 1 two or more times.

3. Perform “Self Diagnostic Result” of “ABS”.
Is any DTC detected?

YES

>> Check the DTC. Refer to 

BRC-56, "DTC Index"

.

NO

>> Inspection End.

VEHICLE JERKS DURING

BRC-155

< SYMPTOM DIAGNOSIS >

[WITH VDC]

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VEHICLE JERKS DURING

Description

INFOID:0000000010120131

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:0000000010120132

1.

CHECK SYMPTOM

Check that the vehicle jerks when VDC function, TCS function, ABS function, EBD function or brake limited

slip differential (BLSD) function operates.
Is the inspection result normal?

YES

>> Normal

NO

>> GO TO 2.

2.

PERFORM SELF DIAGNOSTIC (1)

With CONSULT

1. Turn the power switch OFF 

→ ON.

CAUTION:

• Be sure to wait of 10 seconds after turning power switch OFF or ON.

• Set the vehicle to READY.

2. Repeat step 1 two or more times.

3. Perform “Self Diagnostic Result” of “ABS”.
Is any DTC detected?

YES

>> Check the DTC. Refer to 

BRC-56, "DTC Index"

.

NO

>> GO TO 3.

3.

CHECK CONNECTOR

With CONSULT

1. Turn the power switch OFF.

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

3. Check the connector terminal for deformation, disconnection and looseness.
Is the inspection result normal?

YES

>> GO TO 4.

NO

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

4.

PERFORM SELF DIAGNOSTIC (2)

With CONSULT

1. Connect harness connector.

2. Turn the power switch OFF 

→ ON.

CAUTION:

• Be sure to wait of 10 seconds after turning power switch OFF or ON.

• Set the vehicle to READY.

3. Repeat step 2 two or more times.

4. Perform “Self Diagnostic Result” of “ABS”.
Is any DTC detected?

YES

>> Check the DTC. Refer to 

BRC-56, "DTC Index"

.

NO

>> GO TO 5.

5.

CHECK VCM SYSTEM

With CONSULT

Perform “Self Diagnostic Result” of “EV/HEV”.
Is any DTC detected?

YES

>> Check the DTC.

NO

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

BRC-162, "Removal and Installa-

tion"

.

BRC-156

< SYMPTOM DIAGNOSIS >

[WITH VDC]

THE DRIVING WHEELS SKID GREATLY ON ACCELERATION

THE DRIVING WHEELS SKID GREATLY ON ACCELERATION

System Description

INFOID:0000000010120133

The driving wheels skid greatly on acceleration.

Diagnosis Procedure

INFOID:0000000010120134

1.

STOP LAMP FOR ILLUMINATION

Depress brake pedal and check that stop lamp turns ON.
Does stop lamp turn ON?

YES

>> GO TO 2.

NO

>> Check the stop lamp system.

• LED headlamp: Refer to 

EXL-101, "Diagnosis Procedure"

.

• Halogen headlamp: Refer to 

EXL-238, "Diagnosis Procedure"

.

2.

PERFORM SELF DIAGNOSTIC

With CONSULT

1. Turn the power switch OFF 

→ ON.

CAUTION:

• Be sure to wait of 10 seconds after turning power switch OFF or ON.

• Set the vehicle to READY.

2. Repeat step 1 two or more times.

3. Perform “Self Diagnostic Result” of “ABS”.
Is any DTC detected?

YES

>> Check the DTC. Refer to 

BRC-56, "DTC Index"

.

NO

>> Normal

NORMAL OPERATING CONDITION

BRC-157

< SYMPTOM DIAGNOSIS >

[WITH VDC]

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NORMAL OPERATING CONDITION

Description

INFOID:0000000010120135

Symptom

Result

Brake pedal slightly vibrates and operation sound (motor sound and sound from suspen-
sion) occurs when VDC function, TCS function, ABS function, EBD function, brake limited 
differential (BLSD) function or brake assist function operates.

This is not a malfunction, The symptom 
occurs VDC function, TCS function, ABS 
function, EBD function, brake limited dif-
ferential (BLSD) function and brake as-
sist function that are normally operated.

Brake stopping distance may become longer than models without ABS function depending 
on the road conditions, when ABS function is operated on slippery road like rough road, 
gravel road or snowy road.

Brake pedal vibrates and operation sound occurs during sudden acceleration and corner-
ing, when VDC function, TCS function, brake limited slip differential (BLSD) function or 
brake assist function is operated.

Brake pedal vibrates and motor sound from the motor room occurs, when the traction motor 
starts or the vehicle starts just after starting the traction motor.

This is not a malfunction, because it is 
caused by operation check of ABS actua-
tor and electric unit (control unit).

Acceleration may be felt insufficient depending on the road conditions.

This is not a malfunction, because it is 
caused by TCS function that puts the 
highest priority to obtain the optimum 
traction (stability).

TCS function may operate momentarily, while driving on a road where friction coefficient 
varies, or when downshifting, or fully depressing accelerator pedal.

VDC warning lamp may turn ON, when the vehicle is on a rotating turntable or is given a 
strong shaking or large vibrations on a ship while the traction motor is running.

In this case, restart the traction motor on 
a normal road. If the normal condition is 
restored, there is no malfunction. In that 
case, erase “Self Diagnostic Result” of 
“ABS” memory with CONSULT.

CAUTION:

• Turn the power switch OFF 

→ ON → 

OFF after erase self-diagnosis re-
sult.

• Be sure to wait of 10 seconds after 

turning power switch OFF or ON.

VDC warning lamp may turn ON and VDC function and TCS function may not normally op-
erate, when driving on a special road the is extremely slanted (bank in a circuit course).

A malfunction in yaw rate/side/decel G sensor system may be detected when the vehicle 
sharply turns during a spin turn, acceleration turn or drift driving while VDC function and 
TCS function are OFF (VDC OFF switch is pressed and VDC OFF indicator lamp is in ON 
status).

The vehicle speed does not increase, when the accelerator pedal is depressed while the 
vehicle is on a 2-wheel chassis dynamometer for speedometer check.

This is not a malfunction. (When checking 
the vehicle on a chassis dynamometer, 
operate VDC OFF switch so that TCS 
function is OFF.)