Nissan Leaf. Manual — part 289
BRAKE SYSTEM WARNING LAMP
BR-477
< DTC/CIRCUIT DIAGNOSIS >
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BRAKE SYSTEM WARNING LAMP
Component Function Check
INFOID:0000000010123108
1.
CHECK BRAKE SYSTEM WARNING LAMP FUNCTION
Check that brake system warning lamp turns ON for approximately several second after power switch is
turned ON.
CAUTION:
Never set the vehicle to READY.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Proceed to
.
Diagnosis Procedure
INFOID:0000000010123109
1.
CHECK POWER AND GROUND CIRCUITS OF ELECTRICALLY-DRIVEN INTELLIGENT BRAKE UNIT
Perform diagnosis of electrically-driven intelligent brake unit power and ground circuits.
.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace error-detected parts.
2.
PERFORM SELF-DIAGNOSIS
With CONSULT
Start CONSULT and perform “BRAKE” and “ABS” self-diagnosis.
Is a malfunction detected?
YES
>> Check the error-detected system.
• “BRAKE”: Refer to
.
• “ABS”: Refer to
NO
>> GO TO 3.
3.
CHECK BRAKE SYSTEM WARNING LAMP ILLUMINATION
Check the combination meter. Refer to
MWI-49, "CONSULT Function (METER/M&A)"
Is the inspection result normal?
YES
>> Replace the electrically-driven intelligent brake unit. Refer to
BR-510, "Removal and installation"
NO
>> Replace combination meter. Refer to
BR-478
< SYMPTOM DIAGNOSIS >
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
SYMPTOM DIAGNOSIS
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
NVH Troubleshooting Chart
INFOID:0000000010283843
Use the chart below to find the cause of the symptom. If necessary, repair or replace these parts.
×: Applicable
Reference page
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H
in
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, R
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cti
on
NV
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NV
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se
ct
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NV
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Possible cause and
SUSPECTED PARTS
Pad
s -
da
ma
ge
d
Pad
s
- un
ev
en
we
ar
Sh
im
s da
ma
ge
d
Roto
r im
b
ala
nc
e
Ro
to
r da
ma
ge
Rotor runout
Roto
r d
efo
rma
tio
n
Roto
r d
efl
ectio
n
Rotor rust
Roto
r th
ickn
ess
va
ria
tio
n
AXLE AND SUSPE
NSION
TIRE
ROA
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WHEEL
D
R
IV
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SH
AF
T
STEERI
N
G
Symptom
BRAKE
Noise
×
×
×
×
×
×
×
×
Shake
×
×
×
×
×
×
Shimmy, Judder
×
×
×
×
×
×
×
×
×
×
×
UNEXPECTED BRAKE PEDAL REACTION
BR-479
< SYMPTOM DIAGNOSIS >
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UNEXPECTED BRAKE PEDAL REACTION
Description
INFOID:0000000010123110
A malfunction of brake pedal feel (height or others) is detected when the brake pedal is depressed.
Diagnosis Procedure
INFOID:0000000010123111
1.
CHECK AXLE
Check that there is no significant looseness of axle.
• Front axle: Refer to
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace error-detected parts.
2.
CHECK DISC ROTOR
Check the disc rotor runout.
• Front: Refer to
BR-496, "DISC ROTOR : Inspection and Adjustment"
• Rear: Refer to
BR-498, "DISC ROTOR : Inspection and Adjustment"
.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Grind disc rotor.
3.
CHECK BRAKE FLUID LEAKAGE
Check the brake fluid leakage.
• Front: Refer to
.
• Rear: Refer to
.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace error-detected parts.
4.
CHECK BRAKE PEDAL
Check the brake pedal items. Refer to
BR-490, "Inspection and Adjustment"
.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Adjust the brake pedal items. Refer to
BR-490, "Inspection and Adjustment"
.
5.
CHECK BRAKING FORCE
Check the braking force.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Check each component of brake system.
6.
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.
BR-480
< SYMPTOM DIAGNOSIS >
THE BRAKING DISTANCE IS LONG
THE BRAKING DISTANCE IS LONG
Description
INFOID:0000000010123112
Brake stopping distance is long when ABS function is operated.
Diagnosis Procedure
INFOID:0000000010123113
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.
1.
CHECK 12V BATTERY
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. Check the 12V battery terminal connections. Refer to
BR-6, "Precaution for Removing 12V Battery"
and
.
4. Check the 12V battery. Refer to
.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace error-detected parts and GO TO 2.
2.
PERFORM SELF-DIAGNOSIS (1)
With CONSULT
1. Connect 12V battery cable to negative terminal.
2. Turn the power switch OFF to ON without depressing the brake pedal.
CAUTION:
Never set the vehicle to READY.
3. Repeat step 2 two or more times.
CAUTION:
Be sure to wait for 5 seconds or more after turning the power switch OFF.
4. Turn the power switch OFF to exit CONSULT, and disconnect CONSULT from data link connector.
5. 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.
6. Turn the power switch ON without depressing the brake pedal.
CAUTION:
Never set the vehicle to READY.
7. Start CONSULT and erase self-diagnosis result of “BRAKE”.
8. Turn the power switch OFF to exit CONSULT, and disconnect CONSULT from data link connector.
9. 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.
10. Turn the power switch ON without depressing the brake pedal.
CAUTION:
Never set the vehicle to READY.
11. Depress brake pedal by 100 mm (3.94 in) or more, and hold the position for 5 seconds or more.
12. Release brake pedal.
13. Start CONSULT and perform “BRAKE” self-diagnosis.
Is DTC detected?
YES
>> Check the DTC. Refer to
. GO TO 3.
NO
>> INSPECTION END
3.
CHECK CONNECTOR TERMINALS
1. Turn the power switch OFF to exit CONSULT, and disconnect CONSULT from data link connector.
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