Nissan Pathfinder (2011 year). Instruction — part 104
VDC/TCS/ABS
BRC-97
< SYMPTOM DIAGNOSIS >
[TYPE 1]
C
D
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G
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J
K
L
M
A
B
BRC
N
O
P
VDC/TCS/ABS
Symptom Table
INFOID:0000000006245956
If ABS warning lamp, VDC OFF indicator lamp and SLIP indicator lamp turn ON, perform self-diagnosis.
NOTE:
• 1: The ABS does not operate when the speed is 10 km/h (6 MPH) or less.
• 2: Under the following conditions, ABS is activated and vibration is felt when brake pedal is lightly depressed. However, this is normal.
- When shifting gears
- When driving on slippery road
- During cornering at high speed
- When passing over bumps or grooves [at approximately 50 mm (1.97 in) or more]
- When pulling away just after starting engine [at approximately 10 km/h (6 MPH) or higher]
Symptom
Check item
Reference
Excessive ABS function operation fre-
quency
Brake force distribution
Looseness of front and rear axle
Wheel sensor and rotor system
Unexpected pedal reaction
Brake pedal stroke
Make sure the braking force is sufficient when the ABS is not operating.
The braking distance is long
Check stopping distance when the ABS is not operating.
ABS function does not operate (Note 1)
ABS actuator and electric unit (control unit)
Pedal vibration or ABS operation sound
occurs (Note 2)
Brake pedal
ABS actuator and electric unit (control unit)
Vehicle jerks during VDC/TCS/ABS con-
trol
ABS actuator and electric unit (control unit)
TCM
ECM
2011 Pathfinder
BRC-98
< SYMPTOM DIAGNOSIS >
[TYPE 1]
EXCESSIVE ABS FUNCTION OPERATION FREQUENCY
EXCESSIVE ABS FUNCTION OPERATION FREQUENCY
Diagnosis Procedure
INFOID:0000000006245957
1.
CHECK START
Check front and rear brake force distribution using a brake tester.
Is the inspection result normal?
YES
>> GO TO 2
NO
>> Check brake system.
2.
CHECK FRONT AND REAR AXLE
Make sure that there is no excessive play in the front and rear axles. Refer to front:
RAX-6, "On-Vehicle Inspection and Service"
.
Is the inspection result normal?
YES
>> GO TO 3
NO
>> Repair or replace malfunctioning components.
3.
CHECK WHEEL SENSOR AND SENSOR ROTOR
Check the following.
• Wheel sensor installation for damage.
• Sensor rotor installation for damage.
• Wheel sensor connector connection.
• Wheel sensor harness inspection.
Is the inspection result normal?
YES
>> GO TO 4
NO
>> • Replace wheel sensor or sensor rotor. Refer to
BRC-110, "Removal and Installation"
BRC-111, "Removal and Installation"
• Repair harness.
4.
CHECK ABS WARNING LAMP DISPLAY
Make sure that the ABS warning lamp is turned off after the ignition switch is turned ON or when driving.
Is the ABS warning lamp illuminated?
YES
>> Perform self-diagnosis. Refer to
BRC-29, "CONSULT-III Function (ABS)"
.
NO
>> Inspection End.
2011 Pathfinder
UNEXPECTED PEDAL REACTION
BRC-99
< SYMPTOM DIAGNOSIS >
[TYPE 1]
C
D
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BRC
N
O
P
UNEXPECTED PEDAL REACTION
Diagnosis Procedure
INFOID:0000000006245958
1.
CHECK BRAKE PEDAL STROKE
Check brake pedal stroke. Refer to
BR-17, "Inspection and Adjustment - Standard Pedal"
tion and Adjustment - Adjustable Pedal"
.
Is the stroke too large?
YES
>> • Bleed air from brake tube and hose. Refer to
BR-20, "Bleeding Brake System"
• Check brake pedal, brake booster, and master cylinder for mount play, looseness, brake system
fluid leakage, etc. Refer to
BR-17, "Inspection and Adjustment - Standard Pedal"
or
"Inspection and Adjustment - Adjustable Pedal"
(master cylinder),
NO
>> GO TO 2
2.
CHECK FUNCTION
Disconnect ABS actuator and electric unit (control unit) connector to deactivate ABS. Check if braking force is
normal in this condition. Connect connector after inspection.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Check brake system.
2011 Pathfinder
BRC-100
< SYMPTOM DIAGNOSIS >
[TYPE 1]
THE BRAKING DISTANCE IS LONG
THE BRAKING DISTANCE IS LONG
Diagnosis Procedure
INFOID:0000000006245959
CAUTION:
The stopping distance on slippery road surfaces might be longer with the ABS operating than when
the ABS is not operating.
1.
CHECK FUNCTION
Turn ignition switch OFF and disconnect ABS actuator and electric unit (control unit) connector to deactivate
ABS. In this condition, check stopping distance. After inspection, connect connector.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Check brake system.
2011 Pathfinder
ABS FUNCTION DOES NOT OPERATE
BRC-101
< SYMPTOM DIAGNOSIS >
[TYPE 1]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
N
O
P
ABS FUNCTION DOES NOT OPERATE
Diagnosis Procedure
INFOID:0000000006245960
CAUTION:
ABS does not operate when speed is 10 km/h (6 MPH) or lower.
1.
CHECK ABS WARNING LAMP DISPLAY
Make sure that the ABS warning lamp turns OFF after ignition switch is turned ON or when driving.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Perform self-diagnosis. Refer to
BRC-29, "CONSULT-III Function (ABS)"
.
2011 Pathfinder
BRC-102
< SYMPTOM DIAGNOSIS >
[TYPE 1]
PEDAL VIBRATION OR ABS OPERATION SOUND OCCURS
PEDAL VIBRATION OR ABS OPERATION SOUND OCCURS
Diagnosis Procedure
INFOID:0000000006245961
CAUTION:
Under the following conditions, ABS is activated and vibration is felt when brake pedal is lightly
depressed. However, this is normal.
• When shifting gears
• When driving on slippery road
• During cornering at high speed
• When passing over bumps or grooves [at approximately 50 mm (1.97 in) or more]
• When pulling away just after starting engine [at approximately 10 km/h (6 MPH) or higher]
1.
SYMPTOM CHECK 1
Check that there are pedal vibrations when the engine is started.
Do vibrations occur?
YES
>> GO TO 2
NO
>> Inspect the brake pedal.
2.
SYMPTOM CHECK 2
Check that there are ABS operation noises when the engine is started.
Do the operation noises occur?
YES
>> GO TO 3
NO
>> Perform self -diagnosis. Refer to
BRC-29, "CONSULT-III Function (ABS)"
3.
SYMPTOM CHECK 3
Check symptoms when electrical component (headlamps, etc.) switches are operated.
Do symptoms occur?
YES
>> Check if there is a radio, antenna, antenna lead wire, or wiring close to the control unit. If there is,
move it farther away.
NO
>> Inspection End.
2011 Pathfinder
VEHICLE JERKS DURING VDC/TCS/ABS CONTROL
BRC-103
< SYMPTOM DIAGNOSIS >
[TYPE 1]
C
D
E
G
H
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J
K
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A
B
BRC
N
O
P
VEHICLE JERKS DURING VDC/TCS/ABS CONTROL
Diagnosis Procedure
INFOID:0000000006245962
1.
SYMPTOM CHECK
Check if the vehicle jerks during VDC/TCS/ABS control.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> GO TO 2
2.
CHECK SELF-DIAGNOSIS RESULTS
Perform self-diagnosis of ABS actuator and electric unit (control unit). Refer to
.
Are self-diagnosis results indicated?
YES
>> Check corresponding items, make repairs, and perform ABS actuator and electric unit (control
unit) self-diagnosis. Refer to
BRC-29, "CONSULT-III Function (ABS)"
NO
>> GO TO 3
3.
CHECK CONNECTOR
• Turn ignition switch OFF and disconnect ABS actuator and electric unit (control unit) connector and check
terminal for deformation, disconnection, looseness, etc.
• Securely connect connectors and perform ABS actuator and electric unit (control unit) self-diagnosis.
Are self-diagnosis results indicated?
YES
>> If poor contact, damage, open or short circuit of connector terminal is found, repair or replace.
NO
>> GO TO 4
4.
CHECK ECM AND TCM SELF-DIAGNOSIS RESULTS
Perform ECM and TCM self-diagnosis. Refer to
.
Are self-diagnosis results indicated?
YES
>> Check the corresponding items.
• ECM: Refer to
.
• TCM: Refer to
TM-36, "CONSULT-III Function (TRANSMISSION)"
.
NO
>> Replace ABS actuator and electric unit (control unit). Refer to
BRC-112, "Removal and Installa-
.
2011 Pathfinder
BRC-104
< SYMPTOM DIAGNOSIS >
[TYPE 1]
NORMAL OPERATING CONDITION
NORMAL OPERATING CONDITION
Description
INFOID:0000000006245963
Symptom
Result
Slight vibrations are felt on the brake pedal and the operation noises occur, when VDC, TCS or ABS is acti-
vated.
This is a normal condi-
tion due to the VDC,
TCS or ABS activation.
Stopping distance is longer than that of vehicles without ABS when the vehicle drives on rough, gravel, or
snow-covered (fresh, deep snow) roads.
The brake pedal moves and generates noises, when TCS or VDC is activated due to rapid acceleration or
sharp turn.
The brake pedal vibrates and motor operation noises occur from the engine room, after the engine starts and
just after the vehicle starts.
This is normal, and it is
caused by the ABS op-
eration check.
Depending on the road conditions, the driver may experience a sluggish feel.
This is normal, because
TCS places the highest
priority on the optimum
traction (stability).
TCS may activate momentarily if wheel speed changes when driving over location where friction coefficient
varies, when downshifting, or when fully depressing accelerator pedal.
The ABS warning lamp, VDC OFF indicator lamp and SLIP indicator lamp may turn ON when the vehicle is
subject to strong shaking or large vibration, such as when the vehicle is rotating on a turntable or located on
a ship while the engine is running.
In this case, restart the
engine on a normal
road. If the normal con-
dition is restored, there
is no malfunction. At
that time, erase the self-
diagnosis memory.
VDC may not operate normally or the ABS warning lamp, VDC OFF indicator lamp, and SLIP indicator lamp
may illuminate, when running on a special road that is extremely slanted (e.g. bank in a circuit course).
A malfunction may occur in the yaw rate/side/decel G sensor system, when the vehicle turns sharply, such
as during a spin turn, axle turn, or drift driving, while the VDC function is off (VDC OFF indicator lamp illumi-
nated).
The vehicle speed will not increase even though the accelerator pedal is depressed, when inspecting the
speedometer on a 2-wheel chassis dynamometer.
Normal (Deactivate the
VDC/TCS function be-
fore performing an in-
spection on a chassis
dynamometer.)
VDC OFF indicator lamp and SLIP indicator lamp may simultaneously turn on when low tire pressure warn-
ing lamp turns on.
This is not a VDC sys-
tem error but results
from characteristic
change of tire.
2011 Pathfinder
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