Nissan Leaf. Manual — part 330
BRC-110
< DTC/CIRCUIT DIAGNOSIS >
[WITH VDC]
C1143 STEERING ANGLE SENSOR
C1143 STEERING ANGLE SENSOR
DTC Logic
INFOID:0000000010120079
DTC DETECTION LOGIC
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 “C1143” detected?
YES
>> Proceed to
BRC-110, "Diagnosis Procedure"
NO
>> Inspection End.
Diagnosis Procedure
INFOID:0000000010120080
Regarding Wiring Diagram information. Refer to
.
1.
CHECK CONNECTOR
1. Turn the power switch OFF.
2. Check the ABS actuator and electric unit (control unit) harness connector for disconnection or looseness.
3. Check the steering angle sensor harness connector for disconnection or looseness.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace error-detected parts, securely lock the connector, and GO TO 2.
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”.
DTC
Display Item
Malfunction detected condition
Possible causes
C1143
ST ANG SEN CIRCUIT
When a malfunction is detected in steering angle sen-
sor.
• Harness or connector
• Steering angle sensor
• ABS actuator and electric unit
(control unit)
• Fuse
• Power switch ON power supply
system
• CAN communication line
C1143 STEERING ANGLE SENSOR
BRC-111
< DTC/CIRCUIT DIAGNOSIS >
[WITH VDC]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
N
O
P
Is DTC “C1143” detected?
YES
>> GO TO 3.
NO
>> Inspection End.
3.
CHECK STEERING ANGLE SENSOR POWER SUPPLY
1. Turn the power switch OFF.
2. Disconnect steering angle sensor harness connector.
3. Check the voltage between steering angle sensor harness connector and ground.
4. Turn the power switch ON.
CAUTION:
Never set the vehicle to READY.
5. Check the voltage between steering angle sensor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> GO TO 4.
4.
CHECK STEERING ANGLE SENSOR POWER SUPPLY CIRCUIT
1. Turn the power switch OFF.
2. Check the 10A fuse (#4).
3. Check the continuity and short circuit between steering angle sensor harness connector terminal (4) 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.
5.
CHECK STEERING ANGLE SENSOR GROUND CIRCUIT
1. Turn the power switch OFF.
2. Check the continuity between steering angle sensor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair or replace error-detected parts.
6.
CHECK TERMINAL
Check the steering angle sensor pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Repair or replace error-detected parts.
7.
CHECK CAN COMMUNICATION LINE
Check the “STRG BRANCH LINE CIRCUIT”. Refer to
.
Is the inspection result normal?
Steering angle sensor
—
Voltage
(Approx.)
Connector
Terminal
M30
4
Ground
0 V
Steering angle sensor
—
Voltage
(Approx.)
Connector
Terminal
M30
4
Ground
Battery voltage
Steering angle sensor
—
Continuity
Connector
Terminal
M30
1
Ground
Yes
BRC-112
< DTC/CIRCUIT DIAGNOSIS >
[WITH VDC]
C1143 STEERING ANGLE SENSOR
YES
>> GO TO 8.
NO
>> Repair or replace error-detected parts. Refer to
LAN-27, "Precautions for Harness Repair"
.
8.
CHECK DATA MONITOR
With CONSULT
1. “ABS”, “Data Monitor” and “STR ANGLE SIG” according to this order.
2. Check that the indication changes with the steering angle when the steering wheel is turned left/right from
the neutral position. Refer to
.
Is the inspection result normal?
YES
>> Replace ABS actuator and electric unit (control unit). Refer to
BRC-162, "Removal and Installa-
.
NO
>> Replace steering angle sensor. Refer to
C1144 INCOMPLETE STEERING ANGLE SENSOR ADJUSTMENT
BRC-113
< DTC/CIRCUIT DIAGNOSIS >
[WITH VDC]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
N
O
P
C1144 INCOMPLETE STEERING ANGLE SENSOR ADJUSTMENT
DTC Logic
INFOID:0000000010120081
DTC DETECTION LOGIC
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 “C1144” detected?
YES
>> Proceed to
BRC-113, "Diagnosis Procedure"
.
NO
>> Inspection End.
Diagnosis Procedure
INFOID:0000000010120082
1.
ADJUST THE NEUTRAL POSITION OF STEERING ANGLE SENSOR
Perform neutral position adjustment of steering angle sensor. Refer to
>> GO TO 2.
2.
CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
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 “C1144” detected?
YES
>> GO TO 3.
NO
>> Inspection End.
3.
CHECK STEERING ANGLE SENSOR SYSTEM
1. Turn the power switch OFF.
DTC
Display Item
Malfunction detected condition
Possible causes
C1144
ST ANG SEN SIGNAL
When neutral position adjustment of steering angle
sensor is not complete.
• Harness or connector
• Steering angle sensor
• ABS actuator and electric unit
(control unit)
• Incomplete neutral position ad-
justment of steering angle sen-
sor
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