Nissan Leaf. Manual — part 336
BRC-134
< DTC/CIRCUIT DIAGNOSIS >
[WITH VDC]
U110D ELECTRICALLY-DRIVEN INTELLIGENT BRAKE COMMUNICATION
U110D ELECTRICALLY-DRIVEN INTELLIGENT BRAKE COMMUNICATION
Description
INFOID:0000000010120103
ABS actuator and electric unit (control unit) and electrically-driven intelligent brake unit transmit/receive infor-
mation to/from each other for optimum control of the ABS actuator and electric unit (control unit) with the spec-
ified brake communication line.
DTC Logic
INFOID:0000000010120104
DTC DETECTION LOGIC
*: CAN communication line between ABS actuator and electric unit (control unit) and electrically-driven intelli-
gent brake unit.
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn power switch OFF and
wait at least 10 seconds before conducting the next test.
>> GO TO 2.
2.
CHECK DTC DETECTION
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 DTC “U110D” detected?
YES
>> Proceed to diagnosis procedure. Refer to
BRC-134, "Diagnosis Procedure"
.
NO
>> Inspection End.
Diagnosis Procedure
INFOID:0000000010120105
Regarding Wiring Diagram information. Refer to
.
1.
CHECK CONNECTOR
1. Turn the power switch OFF.
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.
3. Disconnect 12V battery cable from negative terminal. Refer to
BRC-5, "Precaution for Removing 12V Bat-
4. Disconnect ABS actuator and electric unit (control unit) harness connector.
5. Disconnect electrically-driven intelligent brake unit harness.
6. Check the connector for disconnection or looseness.
Is the inspection result normal?
DTC
Display Item
(Trouble diagnosis content)
Malfunction detected condition
Possible causes
U110D
E-DRIVEN INTELLIGENT
BRAKE COMM
When ABS actuator and electric unit (control unit) is
not transmitting or receiving brake communication
signal for 4 seconds or more.
• ABS actuator and electric unit
(control unit)
• Brake communication line*
• Electrically-driven intelligent
brake unit
U110D ELECTRICALLY-DRIVEN INTELLIGENT BRAKE COMMUNICATION
BRC-135
< DTC/CIRCUIT DIAGNOSIS >
[WITH VDC]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
N
O
P
YES
>> GO TO 2.
NO
>> Repair or replace error-detected parts, securely lock the connector, and GO TO 2.
2.
CHECK BRAKE COMMUNICATION LINE
1. Check the continuity between ABS actuator and electric unit (control unit) harness connector and electri-
cally-driven intelligent brake unit harness connector.
2. Check the continuity between ABS actuator and electric unit (control unit) harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace the harnesses and connectors. Refer to
BRC-8, "Precaution for Harness
. GO TO 3.
3.
PERFORM SELF DIAGNOSTIC (1)
With CONSULT
1. Turn the power switch OFF.
2. Connect ABS actuator and electric unit (control unit) harness connector.
3. Connect electrically-driven intelligent brake unit harness.
4. 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.
5. Repeat step 5 two or more times.
6. Perform “Self Diagnostic Result” of “ABS”.
Is DTC “C118A”, “U1000” or “U110D” detected?
YES (“C118A”)>>Refer to
BRC-128, "Diagnosis Procedure"
BRC-132, "Diagnosis Procedure"
.
YES (“U110D”)>>GO TO 4.
NO
>> Inspection End.
4.
CHECK ELECTRICALLY-DRIVEN INTELLIGENT BRAKE SYSTEM
With CONSULT
Perform “Self Diagnostic Result” of “BRAKE”.
Is any DTC detected?
YES
>> Check the DTC. Refer to
NO
>> GO TO 5.
5.
PERFORM SELF DIAGNOSTIC (2)
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 DTC “U110D” detected?
ABS actuator and electric unit (control unit)
Electrically-driven intelligent brake unit
Continuity
Connector
Terminal
Connector
Terminal
E35
20
E34
44
Yes
25
43
Yes
ABS actuator and electric unit (control unit)
—
Continuity
Connector
Terminal
E35
20
Ground
No
25
BRC-136
< DTC/CIRCUIT DIAGNOSIS >
[WITH VDC]
U110D ELECTRICALLY-DRIVEN INTELLIGENT BRAKE COMMUNICATION
YES
>> Replace ABS actuator and electric unit (control unit). Refer to
BRC-162, "Removal and Installa-
.
NO
>> Inspection End.
POWER SUPPLY AND GROUND CIRCUIT
BRC-137
< DTC/CIRCUIT DIAGNOSIS >
[WITH VDC]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
N
O
P
POWER SUPPLY AND GROUND CIRCUIT
Diagnosis Procedure
INFOID:0000000010120106
Regarding Wiring Diagram information. Refer to
1.
CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) POWER SWITCH ON POWER SUP-
PLY
1. Turn the power switch OFF.
2. Disconnect ABS actuator and electric unit (control unit) harness connector.
3. Check the voltage between ABS actuator and electric unit (control unit) harness connector and ground.
4. Turn the power switch ON
CAUTION:
Never set the vehicle to READY.
5. Check the voltage between ABS actuator and electric unit (control unit) harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) POWER SWITCH ON POWER SUP-
PLY CIRCUIT
1. Turn the power switch OFF.
2. Check the 10A fuse (#4).
3. Check the continuity and short circuit between ABS actuator and electric unit (control unit) harness con-
nector terminal (16) and 10A fuse (#4).
Is the inspection result normal?
YES
>> Perform trouble diagnosis for power switch ON power supply. Refer to
NO
>> Repair or replace error-detected parts.
3.
CHECK MOTOR AND MOTOR RELAY 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.
ABS actuator and electric unit (control unit)
—
Voltage
(Approx.)
Connector
Terminal
E35
16
Ground
0 V
ABS actuator and electric unit (control unit)
—
Voltage
(Approx.)
Connector
Terminal
E35
16
Ground
Battery voltage
ABS actuator and electric unit (control unit)
—
Voltage
(Approx.)
Connector
Terminal
E35
1
Ground
Battery voltage
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