Nissan Titan. Manual — part 40
VDC/TCS/ABS
BRC-101
< SYMPTOM DIAGNOSIS >
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
N
O
P
SYMPTOM DIAGNOSIS
VDC/TCS/ABS
Symptom Table
INFOID:0000000009883730
If ABS warning 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
BRC-102
< SYMPTOM DIAGNOSIS >
[VDC/TCS/ABS]
EXCESSIVE ABS FUNCTION OPERATION FREQUENCY
EXCESSIVE ABS FUNCTION OPERATION FREQUENCY
Diagnosis Procedure
INFOID:0000000009883731
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-5, "On-Vehicle Inspection"
.
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-113, "Removal and Installation"
115, "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-24, "CONSULT Function (ABS)"
NO
>> Inspection End.
UNEXPECTED PEDAL REACTION
BRC-103
< SYMPTOM DIAGNOSIS >
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
N
O
P
UNEXPECTED PEDAL REACTION
Diagnosis Procedure
INFOID:0000000009883732
1.
CHECK BRAKE PEDAL STROKE
Check brake pedal stroke. Refer to
BR-13, "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-16, "Bleeding Brake System"
• Check brake pedal, brake booster, and master cylinder for mount play, looseness, brake system
fluid leakage, etc. Refer to
BR-13, "Inspection and Adjustment - Standard Pedal"
or
"Inspection and Adjustment - Adjustable Pedal"
(master cylinder),
(brake booster).
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.
BRC-104
< SYMPTOM DIAGNOSIS >
[VDC/TCS/ABS]
THE BRAKING DISTANCE IS LONG
THE BRAKING DISTANCE IS LONG
Diagnosis Procedure
INFOID:0000000009883733
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.
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