2004 NISSAN TERRANO sensor

Diagnostic Procedure 10 (Pedal vibration and
noise)
INSPECTION START
1. Apply brake.
2. Start engine.
3. Does the symptom appear only whenengine is started?
No
EYe s Carry out self-diagnosis.
Refer to BR-60.
CHECK IF SYMPTOM APPEARS.
Does the symptom appear when electrical
equipment switches (such as headlamp)
are operated?
Ye s
ENoGo toin Diagnostic
Procedure 12, BR-82.
CHECK WHEEL SENSOR.
Check wheel sensor shield ground. For
location of shield ground, refer to wiring
diagram and ªHARNESS LAYOUTº in EL
section.
OK
ENG Repair wheel sensor.
CHECK HARNESS CONNECTOR.
Check ABS actuator and electric unit pin
terminals for damage or the connection of
ABS actuator and electric unit harness
connector.
Reconnect ABS actuator and electric unit
harness connector. Then retest.
Note: ABS may operate and cause vibration under any of the
following conditions.
Diagnostic Procedure 11 (Long stopping
distance)
CHECK ABS PERFORMANCE.
Disconnect ABS actuator and electric unit
connector and check whether stopping
distance is still long.
Ye s
ENoGo toin Diagnostic
Procedure 12, BR-82.
Perform Preliminary Check and air bleed-
ing.
Note: Stopping distance may be larger than vehicles without ABS when road condition is slippery.
SAT797AH
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TROUBLE DIAGNOSES
BR-81
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Diagnostic Procedure 12 (Unexpected pedal
action)
CHECK BRAKE PEDAL STROKE.
Check brake pedal stroke. Is stroke exces-
sively large?
No
EYe sPerform Preliminary Check.
Refer to BR-66.
CHECK BRAKE PERFORMANCE
Disconnect ABS actuator and electric unit
connector and check whether brake is
effective.
Ye s
ENoPerform Preliminary Check.
Refer to BR-66.
CHECK IF WARNING LAMP ACTIVATES.
Ensure warning lamp remains off while
driving.
OK
ENG
Carry out self-diagnosis.
Refer to BR-60.
CHECK WHEEL SENSOR.
1. Check wheel sensor connector for ter-
minal damage or loose connection.
2. Perform wheel sensor mechanical check.
Refer to Diagnostic Procedure 4,
BR-74.
OK
ENG Repair.
CHECK HARNESS CONNECTOR.
Check ABS actuator and electric unit pin
terminals for damage or the connection of
ABS actuator and electric unit harness
connector.
Reconnect ABS actuator and electric unit
harness connector. Then retest.
CAUTION: Drive at low speed and brake smoothly to prevent
rear wheels locking.
SBR540A
YBR279
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H
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TROUBLE DIAGNOSES
BR-82
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Diagnostic Procedure 13
SYMPTOM: ABS does not work.
Does the ABS warning lamp activate?
No
EYe sCarry out self-diagnosis.
Refer to BR-60.
Go toin Diagnostic Procedure 12,
BR-82.
Note: ABS does not work when vehicle speed is under 10 km/h (6 MPH).
Diagnostic Procedure 14
SYMPTOM: ABS works frequently.
CHECK WHEEL SENSOR.
1. Check wheel sensor connector for ter-
minal damage or loose connections.
2. Perform wheel sensor mechanical check.
Refer to Diagnostic Procedure 4,
BR-74.
OK
ENG Repair.
CHECK FRONT AXLES
Check front axles for excessive loose-
ness. Refer to FA section (ªFront Wheel
Bearingº, ªON-VEHICLE SERVICEº).
OK
ENGRepair.
Go toin Diagnostic Procedure 12,
BR-82.
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TROUBLE DIAGNOSES
BR-83
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Electrical Components Inspection
WHEEL SENSOR
Check resistance for each sensor.Resistance:Front 0.9 - 1.1 k W
Rear 1.44 - 1.76 k W
G SENSOR
Condition Resistance between ter-
minals q3andq4Continuity
Installed in vehicle Approx. 1.5 kW Ye s
Tilted as shown in figure Approx. 5.1 kW No
YBR085
YBR280
TROUBLE DIAGNOSES
BR-84
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Supplemental Restraint System (SRS) ªAIR
BAGº and ªSEAT BELT PRE-TENSIONERº
The Supplemental Restraint System such as ªAIR BAGº and ªSEAT BELT PRE-TENSIONERº used along with
a seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of
collision. The SRS composition which is available to NISSAN MODEL R20 is as follows (The composition
varies according to the destination and optional equipment.):
IFor a frontal collision
The Supplemental Restraint System consists of driver air bag module (located in the center of the steer-
ing wheel), front passenger air bag module (located on the instrument panel on passenger side), front seat
belt pre-tensioners, a diagnosis sensor unit, warning lamp, wiring harness and spiral cable.
I For a side collision
The Supplemental Restraint System consists of front side air bag module (located in the outer side of front
seat), side air bag (satellite) sensor, diagnosis sensor unit (one of components of air bags for a frontal
collision), wiring harness, warning lamp (one of components of air bags for a frontal collision).
WARNING:
I To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance should be per-
formed by an authorized NISSAN dealer.
I Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system.
I Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. Spiral cable and wiring harnesses covered with yellow insulation tape either just
before the harness connectors or for the complete harness are related to the SRS.
Precautions for SRS ªAIR BAGº and ªSEAT
BELT PRE-TENSIONERº Service
IDo not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
I Before servicing the SRS, turn ignition switch ªOFFº, disconnect both battery cables and wait at least 3
minutes.
For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt
pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes
have passed.
I Diagnosis sensor unit must always be installed with their arrow marks ª +º pointing towards the front of
the vehicle for proper operation. Also check diagnosis sensor unit for cracks, deformities or rust before
installation and replace as required.
I The spiral cable must be aligned with the neutral position since its rotations are limited. Do not attempt to
turn steering wheel or column after removal of steering gear.
I Handle air bag module carefully. Always place driver and front passenger air bag modules with the pad
side facing upward and place front side air bag module (built-in type) standing with stud bolt side setting
bottom.
I Conduct self-diagnosis to check entire SRS for proper function after replacing any components.
I After air bag inflates, the front instrument panel assembly should be replaced if damaged.
Precautions for Steering System
IBefore disassembly, thoroughly clean the outside of the unit.
I Disassembly should be done in a clean work area. It is important to prevent the internal parts from
becoming contaminated by dirt or other foreign matter.
I When disassembling parts, be sure to place them in order on a part rack so they can be reinstalled
in their proper positions.
I Use nylon cloths or paper towels to clean the parts; common shop rags can leave lint that might
interfere with their operation.
I Before inspection or reassembly, carefully clean all parts with a general purpose, non-flammable
solvent.
I Before assembly, apply a coat of recommended ATF* to hydraulic parts. Vaseline may be applied
to O-rings and seals. Do not use any grease.
I Replace all gaskets, seals and O-rings. Avoid damaging O-rings, seals and gaskets during instal-
lation. Perform functional tests whenever designated.
*: Automatic transmission fluid
PRECAUTIONS
ST-2
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RESTRAINT SYSTEM
SECTION
RS
CONTENTS
SEAT BELTS ...................................................................2
Precautions ..................................................................2
Front Seat Belt.............................................................4
Rear Seat Belt .............................................................6
SUPPLEMENTAL RESTRAINT SYSTEM (SRS) ............8
Precautions ..................................................................8
Preparation ..................................................................9
SRS Configuration .....................................................10
Seat Belt Pre-tensioner with Load Limiter................. 11
Built-in Type Side Air Bag.......................................... 11
SRS Component Parts Location ...............................12
Maintenance Items ....................................................12
Diagnosis Sensor Unit ...............................................13
Front Seat Belt Pre-tensioner ....................................14
Side Air Bag (Satellite) Sensor ..................................15
Driver Air Bag Module and Spiral Cable ...................16
Front Passenger Air Bag Module ..............................19 Front Side Air Bag Module ........................................20
Disposal of Air Bag Module and Seat Belt Pre-
tensioner ....................................................................22
Trouble Diagnoses Introduction.................................28
How to Perform Trouble Diagnoses for Quick
and Accurate Repair ..................................................31
Schematic ..................................................................33
Wiring Diagram - SRS -.............................................34
SRS Operation Check ...............................................38
Trouble Diagnoses with CONSULT-II..................39
Trouble Diagnoses without CONSULT-II.............48
Trouble Diagnoses: ²AIR BAG² Warning Lamp
Does Not Turn Off .....................................................56
Trouble Diagnoses: ²AIR BAG² Warning Lamp
Does Not Turn On .....................................................58
Collision Diagnosis ....................................................59
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Precautions
SUPPLEMENTAL RESTRAINT SYSTEM (SRS) ªAIR BAGº AND ªSEAT BELT
PRE-TENSIONERº
The Supplemental Restraint System such as ªAIR BAGº and ªSEAT BELT PRE-TENSIONERº used along with
a seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of
collision. The SRS composition which is available to NISSAN MODEL R20 is as follows (The composition
varies according to the destination and optional equipment.):
IFor a frontal collision
The Supplemental Restraint System consists of driver air bag module (located in the center of the steer-
ing wheel), front passenger air bag module (located on the instrument panel on passenger side), front seat
belt pre-tensioners, a diagnosis sensor unit, warning lamp, wiring harness and spiral cable.
I For a side collision
The Supplemental Restraint System consists of front side air bag module (located in the outer side of front
seat), side air bag (satellite) sensor, diagnosis sensor unit (one of components of air bags for a frontal
collision), wiring harness, warning lamp (one of components of air bags for a frontal collision).
WARNING:
I To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance should be per-
formed by an authorized NISSAN dealer.
I Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system.
I Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. Spiral cable and wiring harnesses covered with yellow insulation tape either just
before the harness connectors or for the complete harness are related to the SRS.
Precaution for Seat Belt Service
CAUTION:
IBefore removing the seat belt pre-tensioner assembly, turn the ignition switch off, disconnect both
battery cables and wait at least 3 minutes.
I Do not use electrical test equipment for seat belt pre-tensioner connector.
I After replacing or reinstalling seat belt pre-tensioner assembly, or reconnecting seat belt pre-ten-
sioner connector, check the system function. Refer to ªSRS Operation Checkº for details. (RS-38)
I Do not disassemble buckle or seat belt assembly.
I Replace anchor bolts if they are deformed or worn out.
I Never oil tongue and buckle.
I If any component of seat belt assembly is questionable, do not repair. Replace the whole seat belt
assembly.
I If webbing is cut, frayed, or damaged, replace seat belt assembly.
I When replacing seat belt assembly, use a genuine seat belt assembly.
After A Collision
WARNING:
Inspect all seat belt assemblies including retractors and attaching hardware after any collision.
NISSAN recommends that all seat belt assemblies in use during a collision be replaced unless the
collision was minor and the belts show no damage and continue to operate properly. Failure to do so
could result in serious personal injury in an accident. Seat belt assemblies not in use during a colli-
sion should also be replaced if either damage or improper operation is noted. Seat belt pre-tensioner
should be replaced even if the seat belts are not in use during a frontal collision in which the air bags
are deployed.
Replace any seat belt assembly if:
IThe seat belt was in use at the time of a collision (except for minor collisions and the belts, retractors and
buckles show no damage and continue to operate properly).
I The seat belt was damaged in an accident. (i.e. torn webbing, bent retractor or guide, etc.)
I The seat belt attaching point was damaged in an accident. Inspect the seat belt attaching area for dam-
age or distortion and repair as necessary before installing a new seat belt assembly.
I Anchor bolts are deformed or worn out.
SEAT BELTS
RS-2
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Precautions
SUPPLEMENTAL RESTRAINT SYSTEM (SRS) ªAIR BAGº AND ªSEAT BELT
PRE-TENSIONERº
The Supplemental Restraint System such as ªAIR BAGº and ªSEAT BELT PRE-TENSIONERº used along with
a seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of
collision. The SRS composition which is available to NISSAN MODEL R20 is as follows (The composition
varies according to the destination and optional equipment.):
IFor a frontal collision
The Supplemental Restraint System consists of driver air bag module (located in the center of the steer-
ing wheel), front passenger air bag module (located on the instrument panel on passenger side), front seat
belt pre-tensioners, a diagnosis sensor unit, warning lamp, wiring harness and spiral cable.
I For a side collision
The Supplemental Restraint System consists of front side air bag module (located in the outer side of front
seat), side air bag (satellite) sensor, diagnosis sensor unit (one of components of air bags for a frontal
collision), wiring harness, warning lamp (one of components of air bags for a frontal collision).
WARNING:
I To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance should be per-
formed by an authorized NISSAN dealer.
I Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system.
I Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. Spiral cable and wiring harnesses covered with yellow insulation tape either just
before the harness connectors or for the complete harness are related to the SRS.
PRECAUTIONS FOR SRS ªAIR BAGº AND ªSEAT BELT PRE-TENSIONERº SERVICE
IDo not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
I Before servicing the SRS, turn ignition switch ªOFFº, disconnect both battery cables and wait at least 3
minutes.
For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt
pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes
have passed.
I Diagnosis sensor unit must always be installed with their arrow marks ª +º pointing towards the front of
the vehicle for proper operation. Also check diagnosis sensor unit for cracks, deformities or rust before
installation and replace as required.
I The spiral cable must be aligned with the neutral position since its rotations are limited. Do not attempt to
turn steering wheel or column after removal of steering gear.
I Handle air bag module carefully. Always place driver and front passenger air bag modules with the pad
side facing upward and place front side air bag module (built-in type) standing with stud bolt side setting
bottom.
I Conduct self-diagnosis to check entire SRS for proper function after replacing any components.
I After air bag inflates, the front instrument panel assembly should be replaced if damaged.
WIRING DIAGRAMS AND TROUBLE DIAGNOSIS
When you read wiring diagrams, refer to the following:
IGI-10, ªHOW TO READ WIRING DIAGRAMSº
I EL-8, ªPOWER SUPPLY ROUTINGº for power distribution circuit
When you perform trouble diagnosis, refer to the following:
I GI-25, ªHOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSISº
I GI-22, ªHOW TO PERFORM EFFICIENT DIAGNOSES FOR AN ELECTRICAL INCIDENTº
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
RS-8
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