Nissan Quest E52. Instruction — part 248
C1144 INCOMPLETE STEERING ANGLE SENSOR ADJUSTMENT
BRC-85
< 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:0000000009651403
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn ignition 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 ignition switch OFF to ON.
2.
Perform self-diagnosis for “ABS”.
Is DTC “C1144” detected?
YES
>> Proceed to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009651404
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
Perform self-diagnosis for “ABS”.
Is DTC “C1144” detected?
YES
>> GO TO 3.
NO
>> INSPECTION END
3.
CHECK STEERING ANGLE SENSOR SYSTEM
1.
Turn the ignition switch OFF.
2.
Check steering angle sensor system. Refer to
.
Is the inspection result normal?
YES
>> Replace ABS actuator and electric unit (control unit). Refer to
BRC-123, "Removal and Installa-
.
NO
>> Repair or replace error-detected parts.
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
BRC-86
< DTC/CIRCUIT DIAGNOSIS >
[WITH VDC]
C1145, C1146 YAW RATE/SIDE G SENSOR
C1145, C1146 YAW RATE/SIDE G SENSOR
DTC Logic
INFOID:0000000009651405
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn ignition 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 ignition switch OFF to ON.
2.
Perform self-diagnosis for “ABS”.
Is DTC “C1145” or “C1146” detected?
YES
>> Proceed to
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009651406
CAUTION:
• Sudden turns (such as spin turns, acceleration turns), drifting, etc. may cause yaw rate/side G sen-
sor circuit indicate a malfunction. However this is not a malfunction if normal operation can be
resumed after restarting engine.
• When on a turntable, such as at a parking structure entrance, or when on a moving object with
engine running, the VDC warning lamp might turn on and self-diagnosis using the CONSULT yaw
rate sensor system malfunction might be displayed, but in this case there is no malfunction with yaw
rate/side G sensor circuit. As soon as the vehicle leaves the turntable or moving object, restart the
engine to return the system to normal.
1.
CHECK CONNECTOR
1.
Turn ignition switch OFF.
2.
Check ABS actuator and electric unit (control unit) harness connector for disconnection or looseness.
3.
Check yaw rate/side G 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-DIAGNOSIS
Perform self-diagnosis for “ABS” again.
Is DTC “C1145” or “C1146” detected?
YES
>> GO TO 3.
NO
>> INSPECTION END
DTC
Display item
Malfunction detected condition
Possible cause
C1145
YAW RATE SENSOR
• Yaw rate sensor is malfunctioning.
• Yaw rate/side G sensor signal line is open or shorted.
• When yaw rate/side G sensor power supply voltage is
in following state.
- Yaw rate/side G sensor power supply voltage: 10 V
≥
Yaw rate/side G sensor.
- Yaw rate/side G sensor power supply voltage: 16 V
≤
Yaw rate/side G sensor power supply voltage.
• Harness or connector
• Yaw rate/side G sensor
• ABS actuator and electric unit
(control unit)
C1146
SIDE G-SEN CIRCUIT
Side G sensor is malfunctioning.
C1145, C1146 YAW RATE/SIDE G SENSOR
BRC-87
< DTC/CIRCUIT DIAGNOSIS >
[WITH VDC]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
N
O
P
3.
CHECK YAW RATE/SIDE G SENSOR POWER SUPPLY
1.
Turn ignition switch OFF.
2.
Disconnect yaw rate/side G sensor harness connector.
3.
Check voltage between yaw rate/side G sensor harness connector and ground.
4.
Turn the ignition switch ON.
CAUTION:
Never start engine.
5.
Check voltage between yaw rate/side G sensor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> GO TO 4.
4.
CHECK YAW RATE/SIDE G SENSOR POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect ABS actuator and electric unit (control unit) harness connector.
3.
Check continuity between yaw rate/side G sensor harness connector and ABS actuator and electric unit
(control unit) harness connector.
4.
Check continuity between yaw rate/side G sensor harness connector and ground.
Is the inspection result normal?
YES
>> Replace ABS actuator end electric unit (control unit). Refer to
BRC-123, "Removal and Installa-
.
NO
>> Repair or replace error-detected parts.
5.
CHECK YAW RATE/SIDE G SENSOR GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Check continuity between yaw rate/side G sensor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair or replace error-detected parts.
6.
CHECK YAW RATE/SIDE G SENSOR SIGNAL CIRCUIT
Yaw rate/side G sensor
—
Voltage
Connector
Terminal
M52
4
Ground
Approx. 0 V
Yaw rate/side G sensor
—
Voltage
Connector
Terminal
M52
4
Ground
Approx. 12 V
Yaw rate/side G sensor
ABS actuator and electric unit (control unit)
Continuity
Connector
Terminal
Connector
Terminal
M52
4
E36
4
Existed
Yaw rate/side G sensor
—
Continuity
Connector
Terminal
M52
4
Ground
Not existed
Yaw rate/side G sensor
—
Continuity
Connector
Terminal
M52
1
Ground
Existed
BRC-88
< DTC/CIRCUIT DIAGNOSIS >
[WITH VDC]
C1145, C1146 YAW RATE/SIDE G SENSOR
Check continuity between yaw rate/side G sensor harness connector and ABS actuator and electric unit (con-
trol unit) harness connector.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Repair or replace error-detected parts.
7.
CHECK TERMINAL
1.
Disconnect ABS actuator and electric unit (control unit) harness connector and then check ABS actuator
and electric unit (control unit) pin terminals for damage or loose connection with harness connector.
2.
Disconnect yaw rate/side G sensor harness connector and check yaw rate/side G sensor pin terminals for
damage or loose connection with harness connector.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Repair or replace error-detected parts.
8.
REPLACE YAW RATE/SIDE G SENSOR
With CONSULT
1.
Connect ABS actuator and electric unit (control unit) harness connector
2.
Replace yaw rate/side G sensor. Refer to
BRC-125, "Removal and Installation"
3.
Erase self-diagnosis result for “ABS”.
4.
Turn the ignition switch OFF.
5.
Turn the ignition switch ON.
CAUTION:
Never start engine.
6.
Perform self-diagnosis for “ABS”.
Is DTC “C1145” or “c1146” detected?
YES
>> Replace ABS actuator and electric unit (control unit). Refer to
BRC-123, "Removal and Installa-
.
NO
>> INSPECTION END
Yaw rate/side G sensor
ABS actuator and electric unit (control unit)
Continuity
Connector
Terminal
Connector
Terminal
M52
2
E36
25
Existed
3
19
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