Nissan Leaf. Instruction — part 288
POWER SUPPLY AND GROUND CIRCUIT
BR-473
< DTC/CIRCUIT DIAGNOSIS >
C
D
E
G
H
I
J
K
L
M
A
B
BR
N
O
P
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> Repair or replace error-detected parts.
9.
CHECK TERMINAL
• Check for failures in the pin terminals and connections of the electrically-driven intelligent brake unit harness
connector.
• Check that there is no malfunction in pin terminal and connection of IPDM E/R harness connector.
• Check for failures of pin terminals and connections in brake power supply backup unit harness connector.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Repair or replace error-detected parts.
Brake power supply backup unit
—
Continuity
Connector
Terminal
B15
2
Ground
Existed
BR-474
< DTC/CIRCUIT DIAGNOSIS >
WARNING BUZZER
WARNING BUZZER
Diagnosis Procedure
INFOID:0000000010123102
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.
CHECK WARNING BUZZER CIRCUIT
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-
4. Disconnect the electrically-driven intelligent brake unit harness connector.
5. Disconnect buzzer harness connector.
6. Check the continuity between electrically-driven intelligent brake unit and warning buzzer.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace error-detected parts.
3.
CHECK WARNING BUZZER
Check the warning buzzer. Refer to
BR-474, "Component Inspection"
.
Is the inspection result normal?
YES
>> Replace the electrically-driven intelligent brake unit. Refer to
BR-510, "Removal and installation"
NO
>> Replace the warning buzzer. Refer to
BR-515, "Removal and Installation"
Component Inspection
INFOID:0000000010123103
1.
CHECK WARNING BUZZER
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-
4. Disconnect buzzer harness connector.
5. Apply voltage of 12V between warning buzzer connector terminals 1 and 2.
Electrically-driven intelligent brake
unit
Warning buzzer
Continuity
Connector
Terminal
Connector
Terminal
E34
36
M13
1
Existed
20
1
Not existed
36
2
Not existed
20
2
Existed
WARNING BUZZER
BR-475
< DTC/CIRCUIT DIAGNOSIS >
C
D
E
G
H
I
J
K
L
M
A
B
BR
N
O
P
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace the warning buzzer. Refer to
BR-515, "Removal and Installation"
Condition
Warning buzzer
Voltage applied
Sound
Voltage not applied
No sound
BR-476
< DTC/CIRCUIT DIAGNOSIS >
BRAKE WARNING LAMP
BRAKE WARNING LAMP
Component Function Check
INFOID:0000000010123106
1.
CHECK BRAKE WARNING LAMP FUNCTION (1)
Check that brake 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
>> GO TO 2.
NO
>> Refer to
.
2.
CHECK BRAKE SYSTEM WARNING LAMP FUNCTION (2)
Check that brake warning lamp in combination meter turns ON/OFF when parking brake is operated.
NOTE:
Brake warning lamp turns ON when parking brake is operated (when parking brake switch is ON).
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Check parking brake system. Refer to
BRC-142, "Diagnosis Procedure"
.
3.
CHECK BRAKE WARNING LAMP FUNCTION (2)
Check that brake warning lamp in combination meter turns ON or OFF when brake fluid level switch is oper-
ated while brake fluid level in reservoir tank is at the specified level.
NOTE:
Brake warning lamp turns ON when brake fluid is less than the specified level (when brake fluid level switch is
ON).
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Check the brake fluid level switch system. Refer to
BRC-115, "Diagnosis Procedure"
.
Diagnosis Procedure
INFOID:0000000010123107
1.
CHECK POWER AND GROUND CIRCUITS OF ELECTRICALLY-DRIVEN INTELLIGENT BRAKE UNIT
Perform diagnosis of electrically-driven intelligent brake unit power and ground circuits. Refer to
.
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 malfunction detected?
YES
>> Check the error-detected system.
• “BRAKE”: Refer to
.
• “ABS”: Refer to
.
NO
>> GO TO 3.
3.
CHECK THAT BRAKE WARNING LAMP TURNS ON
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
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