Nissan Leaf. Manual — part 337
BRC-138
< DTC/CIRCUIT DIAGNOSIS >
[WITH VDC]
POWER SUPPLY AND GROUND CIRCUIT
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> GO TO 4.
4.
CHECK MOTOR AND MOTOR RELAY POWER SUPPLY CIRCUIT
1. Turn the power switch OFF.
2. Check the 30A fusible link (#L).
3. Check the continuity and short circuit between ABS actuator and electric unit (control unit) harness con-
nector terminal (1) and 30A fusible link (#L).
Is the inspection result normal?
YES
>> Perform trouble diagnosis for 12V battery power supply. Refer to
.
NO
>> Repair or replace error-detected parts.
5.
CHECK ACTUATOR RELAY, ABS IN VALVE, ABS OUT VALVE POWER SUPPLY
1. Turn the power switch OFF.
2. Check the voltage between ABS actuator and electric unit (control unit) harness connector and ground.
3. Turn the power switch ON
CAUTION:
Never set the vehicle to READY.
4. Check the voltage between ABS actuator and electric unit (control unit) harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> GO TO 6.
6.
CHECK ACTUATOR RELAY, ABS IN VALVE, ABS OUT VALVE POWER SUPPLY CIRCUIT
1. Turn the power switch OFF.
2. Check the 50A fusible link (#J).
3. Check the continuity and short circuit between ABS actuator and electric unit (control unit) harness con-
nector terminal (2) and 50A fusible link (#J).
Is the inspection result normal?
YES
>> Perform trouble diagnosis for 12V battery power supply. Refer to
.
NO
>> Repair or replace error-detected parts.
7.
CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) GROUND CIRCUIT
Check the continuity between ABS actuator and electric unit (control unit) harness connector and the ground.
ABS actuator and electric unit (control unit)
—
Voltage
(Approx.)
Connector
Terminal
E35
1
Ground
Battery voltage
ABS actuator and electric unit (control unit)
—
Voltage
(Approx.)
Connector
Terminal
E35
2
Ground
Battery voltage
ABS actuator and electric unit (control unit)
—
Voltage
(Approx.)
Connector
Terminal
E35
2
Ground
Battery voltage
POWER SUPPLY AND GROUND CIRCUIT
BRC-139
< DTC/CIRCUIT DIAGNOSIS >
[WITH VDC]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
N
O
P
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Repair or replace error-detected parts.
8.
CHECK TERMINAL
Check the ABS actuator and electric unit (control unit) pin terminals for damage or loose connection with har-
ness connector.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Repair or replace error-detected parts.
ABS actuator and electric unit (control unit)
—
Continuity
Connector
Terminal
E35
3
Ground
Yes
4
BRC-140
< DTC/CIRCUIT DIAGNOSIS >
[WITH VDC]
VDC OFF SWITCH
VDC OFF SWITCH
Component Function Check
INFOID:0000000010120107
1.
CHECK VDC OFF SWITCH OPERATION
Check that VDC OFF indicator lamp in combination meter turns ON/OFF when VDC OFF switch is operated.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Proceed to diagnosis procedure. Refer to
BRC-140, "Diagnosis Procedure"
.
Diagnosis Procedure
INFOID:0000000010120108
Regarding Wiring Diagram information. Refer to
.
1.
CHECK VDC OFF SWITCH CIRCUIT
1. Turn the power switch OFF.
2. Disconnect ABS actuator and electric unit (control unit) harness connector.
3. Disconnect VDC OFF switch harness connector.
4. Check the continuity between ABS actuator and electric unit (control unit) harness connector and VDC
OFF switch harness connector.
5. Check the continuity between ABS actuator and electric unit (control unit) harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace error-detected parts.
2.
CHECK VDC OFF SWITCH GROUND CIRCUIT
Check the continuity between VDC OFF switch harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace error-detected parts.
3.
CHECK VDC OFF SWITCH
Check the VDC OFF switch. Refer to
BRC-141, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Replace VDC OFF switch. Refer to
BRC-166, "Removal and Installation"
.
4.
CHECK VDC OFF SWITCH SIGNAL
With CONSULT
ABS actuator and electric unit (control unit)
VDC OFF switch
Continuity
Connector
Terminal
Connector
Terminal
E35
5
M28
6
Yes
ABS actuator and electric unit (control unit)
—
Continuity
Connector
Terminal
E35
5
Ground
No
VDC OFF switch
—
Continuity
Connector
Terminal
M28
8
Ground
Yes
VDC OFF SWITCH
BRC-141
< DTC/CIRCUIT DIAGNOSIS >
[WITH VDC]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
N
O
P
1. Connect ABS actuator and electric unit (control unit) harness connector.
2. Connect VDC OFF switch harness connector.
3. Select “ABS”, “DATA MONITOR” and “OFF SW” according to this order. Check the VDC OFF switch sig-
nal.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> GO TO 5.
5.
CHECK TERMINAL
• Check the ABS actuator and electric unit (control unit) pin terminals for damage or loose connection with
harness connector.
• Check the VDC OFF switch pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?
YES
>> Replace ABS actuator and electric unit (control unit). Refer to
BRC-162, "Removal and Installa-
.
NO
>> Repair or replace error-detected parts.
Component Inspection
INFOID:0000000010120109
1.
CHECK VDC OFF SWITCH
1. Turn the power switch OFF.
2. Disconnect triple switch harness connector.
3. Check the continuity between terminals of VDC OFF switch connector.
Is the inspection result normal?
YES
>> Inspection End
NO
>> Replace VDC OFF switch. Refer to
BRC-166, "Removal and Installation"
.
Condition
DATA MONITOR
When VDC OFF switch is pressed and VDC OFF indicator lamp in combination
meter is in ON status
On
When VDC OFF switch is pressed and VDC OFF indicator lamp in combination
meter is in OFF status
Off
VDC OFF switch
Condition
Continuity
Terminal
8 – 9
When VDC OFF switch is pressed
Yes
When VDC OFF switch is not pressed
No
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