Nissan Pathfinder (2008 year). Manual — part 94
BRC-58
< COMPONENT DIAGNOSIS >
[VDC/TCS/ABS]
C1143, C1144 STEERING ANGLE SENSOR
C1143, C1144 STEERING ANGLE SENSOR
Description
INFOID:0000000001690875
The steering angle sensor detects the rotation amount, angular velocity and direction of the steering wheel,
and transmits the data to the ABS actuator and electric unit (control unit) via CAN communication.
DTC Logic
INFOID:0000000001690876
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
CHECK SELF-DIAGNOSIS RESULTS
Check the self-diagnosis results.
Is above displayed on the self-diagnosis display?
YES
>> Proceed to diagnosis procedure. Refer to
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000001690877
INSPECTION PROCEDURE
1.
CHECK CONNECTOR
1.
Turn ignition switch OFF.
2.
Disconnect ABS actuator and electric unit (control unit) connector.
3.
Disconnect steering angle sensor connector.
4.
Check terminal for deformation, disconnection, looseness, and so on. If any malfunction is found, repair or
replace terminal.
5.
Reconnect connectors and then perform the self-diagnosis. Refer to
Is any item indicated on the self-diagnosis display?
YES
>> GO TO 2
NO
>> Poor connection of connector terminal. Repair or replace connector.
2.
CHECK STEERING ANGLE SENSOR HARNESS
1.
Turn ignition switch OFF.
2.
Disconnect steering angle sensor connector.
DTC
Display item
Malfunction detected condition
Possible cause
C1143
ST ANG SEN CIRCUIT
Neutral position of steering angle sensor is dislocated, or
the steering angle sensor is malfunctioning.
• Harness or connector
• Steering angle sensor
• 4WAS control unit (4WAS
models)
• ABS actuator and electric unit
(control unit)
C1144
ST ANG SEN SIGNAL
Neutral position of steering angle sensor is not finished.
Self-diagnosis results
ST ANG SEN CIRCUIT
ST ANG SEN SIGNAL
C1143, C1144 STEERING ANGLE SENSOR
BRC-59
< COMPONENT DIAGNOSIS >
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
N
O
P
3.
Check continuity between steering angle sensor harness con-
nector terminal and ground.
4.
Turn ignition switch ON.
5.
Check voltage between steering angle sensor harness connec-
tor terminal and ground.
Is the inspection result normal?
YES
>> GO TO 3
NO
>> Repair or replace malfunctioning components.
3.
CHECK DATA MONITOR
1.
Connect the steering angle sensor connector and ABS actuator and electric unit (control unit) connector.
2.
Select “STR ANGLE SIG” in “DATA MONITOR” and check steering angle sensor signal.
Is the inspection result normal?
YES
>> Replace ABS actuator and electric unit (control unit). Refer to
BRC-123, "Removal and Installa-
.
NO
>> Replace steering angle sensor and adjust neutral position of steering angle sensor. Refer to
125, "Removal and Installation"
Component Inspection
INFOID:0000000001690878
1.
CHECK DATA MONITOR
Select “STR ANGLE SIG” in “DATA MONITOR” and check steering angle sensor signal.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Go to diagnosis procedure. Refer to
Special Repair Requirement
INFOID:0000000001690879
1.
ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION
Steering angle sensor
—
Continuity
Connector
Terminal
M17
2
Ground
Yes
WFIA0399E
Steering angle sensor
—
Voltage
Connector
Terminal
M17
3
Ground
Battery voltage
AWFIA0023ZZ
Steering condition
STR ANGLE SIG (DATA MONITOR)
Driving straight
±
2.5
°
Turn 90
°
to right
Approx. +90
°
Turn 90
°
to left
Approx.
−
90
°
Steering condition
STR ANGLE SIG (DATA MONITOR)
Driving straight
±
2.5
°
Turn 90
°
to right
Approx. +90
°
Turn 90
°
to left
Approx.
−
90
°
BRC-60
< COMPONENT DIAGNOSIS >
[VDC/TCS/ABS]
C1143, C1144 STEERING ANGLE SENSOR
Always perform neutral position adjustment for the steering angle sensor when replacing the ABS actuator
and electric unit (control unit). Refer to
BRC-11, "ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL
.
>> GO TO 2
2.
CALIBRATION OF DECEL G SENSOR
Always perform calibration of decel G sensor when replacing the ABS actuator and electric unit (control unit).
Refer to
BRC-12, "CALIBRATION OF DECEL G SENSOR : Description"
.
>> END
C1145, C1146 YAW RATE/SIDE G SENSOR
BRC-61
< COMPONENT DIAGNOSIS >
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
N
O
P
C1145, C1146 YAW RATE/SIDE G SENSOR
Diagnosis Procedure
INFOID:0000000001730977
CAUTION:
Sudden turns (such as spin turns, acceleration turns), drifting, etc. when VDC function is OFF may
cause the yaw rate/side/decel G sensor system to indicate a problem. This is not a problem if normal
operation can be resumed after restarting the engine.
INSPECTION PROCEDURE
1.
SELF-DIAGNOSIS RESULT CHECK
Check self-diagnosis results.
CAUTION:
If vehicle is on turntable at entrance to parking garage, or on other moving surface, VDC OFF indicator
lamp may illuminate and CONSULT-II self-diagnosis may indicate yaw rate sensor system malfunction.
However, in this case there is no malfunction in yaw rate sensor system. Take vehicle off of turntable
or other moving surface, and start engine. Results will return to normal.
Is the above displayed in the self-diagnosis display items?
YES
>> GO TO 2.
NO
>> Inspection End.
2.
CONNECTOR INSPECTION
Disconnect the ABS actuator and electric unit (control unit) connector E125 and yaw rate/side/decel G sensor
connector B73.
Check the terminals for deformation, disconnection, looseness or damage.
OK or NG
OK
>> GO TO 3.
NG
>> Repair or replace as necessary.
3.
YAW RATE/SIDE/DECEL G SENSOR HARNESS INSPECTION
1.
Turn off the ignition switch and disconnect yaw rate/side/decel G sensor connector B73 and ABS actuator
and electric unit (control unit) connector E125.
2.
Check continuity between the ABS actuator and electric unit (control unit) connector E125 and the yaw
rate/side/decel G sensor connector B73.
OK or NG
OK
>> GO TO 4.
NG
>> Repair or replace as necessary.
4.
YAW RATE/SIDE/DECEL G SENSOR INSPECTION
1.
Connect the yaw rate/side/decel G sensor connector B73 and ABS actuator and electric unit (control unit)
connector E125.
Self-diagnosis results
YAW RATE SENSOR
SIDE G-SEN CIRCUIT
G-SENSOR
ABS actuator and electric unit
(control unit) harness connector
E125
Yaw rate/side/decel G sensor
harness connector B73
Continuity
6
3
Yes
24
5
Yes
25
1
Yes
29
2
Yes
BRC-62
< COMPONENT DIAGNOSIS >
[VDC/TCS/ABS]
C1145, C1146 YAW RATE/SIDE G SENSOR
2.
Use “DATA MONITOR” to check if the yaw rate/side/decel G sensor signals are normal.
OK or NG
OK
>> Inspection End.
NG
>> Replace the yaw rate/side/decel G sensor. Refer to
BRC-126, "Removal and Installation"
.
Vehicle status
Yaw rate sensor
(Data monitor standard)
Side G sensor
(Data monitor standard)
Decel G Sensor
(Data monitor standard)
When stopped
-4 to +4 deg/s
-1.1 to +1.1 m/s
-0.11 G to +0.11 G
Right turn
Negative value
Negative value
-
Left turn
Positive value
Positive value
-
Speed up
-
-
Negative value
Speed down
-
-
Positive value
C1155 BRAKE FLUID LEVEL SWITCH
BRC-63
< COMPONENT DIAGNOSIS >
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
N
O
P
C1155 BRAKE FLUID LEVEL SWITCH
Description
INFOID:0000000001690880
The brake fluid level switch converts the brake fluid level to an electric signal and transmits it to the ABS actu-
ator and electric unit (control unit).
DTC Logic
INFOID:0000000001690881
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
CHECK SELF-DIAGNOSIS RESULTS
Check the self-diagnosis results.
Is above displayed on the self-diagnosis display?
YES
>> Proceed to diagnosis procedure. Refer to
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000001690882
INSPECTION PROCEDURE
1.
CONNECTOR INSPECTION
1.
Disconnect ABS actuator and electric unit (control unit) connector E125 and brake fluid level switch con-
nector E21.
2.
Check the terminals for deformation, disconnection, looseness or damage.
Is the inspection result normal?
YES
>> GO TO 2
NO
>> Repair or replace as necessary.
2.
CHECK HARNESS BETWEEN BRAKE FLUID LEVEL SWITCH AND ABS ACTUATOR AND ELECTRIC
UNIT (CONTROL UNIT)
1.
Check continuity between ABS actuator and electric unit (control
unit) harness connector E125 (A) and brake fluid level switch
harness connector E21 (B).
2.
Check continuity between ABS actuator and electric unit (control
unit) harness connector E125 (A) and ground.
Is the inspection result normal?
DTC
Display item
Malfunction detected condition
Possible cause
C1155
BR FLUID LEVEL LOW
Brake fluid level is low or communication line between
the ABS actuator and electric unit (control unit) and brake
fluid level switch is open or shorted.
• Harness or connector
• Brake fluid level switch
• Brake fluid level
Self-diagnosis results
BR FLUID LEVEL LOW
ABS actuator and electric unit
(control unit)
Brake fluid level switch
Continuity
Connector
Terminal
Connector
Terminal
A: E125
8
B: E21
1
Yes
ABS actuator and electric unit (control unit)
—
Continuity
Connector
Terminal
A: E125
8
Ground
No
AWFIA0025ZZ
BRC-64
< COMPONENT DIAGNOSIS >
[VDC/TCS/ABS]
C1155 BRAKE FLUID LEVEL SWITCH
YES
>> GO TO 3
NO
>> Repair or replace malfunctioning components.
3.
CHECK BRAKE FLUID LEVEL SWITCH GROUND
Check continuity between brake fluid level switch harness connector
E21 and ground.
Is the inspection result normal?
YES
>> GO TO 4
NO
>> Repair or replace malfunctioning components.
4.
CHECK BRAKE FLUID LEVEL SWITCH
Check continuity between brake fluid level switch terminals.
Is the inspection result normal?
YES
>> Perform self-diagnosis again. If the same results
appear, replace ABS actuator and electric unit (control unit). Refer to
NO
>> Replace brake fluid level switch.
Component Inspection
INFOID:0000000001690883
1.
CHECK BRAKE FLUID LEVEL SWITCH
1.
Turn ignition switch OFF.
2.
Disconnect brake fluid level switch connector.
3.
Check continuity between brake fluid level switch terminals.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace brake fluid level switch.
Special Repair Requirement
INFOID:0000000001690884
1.
ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION
Always perform neutral position adjustment for the steering angle sensor when replacing the ABS actuator
and electric unit (control unit). Refer to
BRC-11, "ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL
.
Brake fluid level switch
—
Continuity
Connector
Terminal
E21
2
Ground
Yes
AWFIA0026ZZ
Brake fluid level switch
Condition
Continuity
Terminal
1
−
2
When brake fluid is full in the reser-
voir tank.
No
When brake fluid is empty in the
reservoir tank.
Yes
ALFIA0026ZZ
Brake fluid level switch
Condition
Continuity
Terminal
1
−
2
When brake fluid is full in the reser-
voir tank.
No
When brake fluid is empty in the
reservoir tank.
Yes
ALFIA0026ZZ
C1155 BRAKE FLUID LEVEL SWITCH
BRC-65
< COMPONENT DIAGNOSIS >
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
N
O
P
>> GO TO 2
2.
CALIBRATION OF DECEL G SENSOR
Always perform calibration of decel G sensor when replacing the ABS actuator and electric unit (control unit).
Refer to
BRC-12, "CALIBRATION OF DECEL G SENSOR : Description"
.
>> END
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