2008 NISSAN TEANA power steering

SEC-190
< ECU DIAGNOSIS >[INTELLIGENT KEY SYSTEM]
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
If No CAN Communication Is Available With BCM
IGNITION RELAY MALFUNCTION DETECTION FUNCTION
 IPDM E/R monitors the voltage at the contact circuit and excitation coil circuit of the ignition relay inside it.
 IPDM E/R judges the ignition relay error if the voltage differs between the contact circuit and the excitation
coil circuit.
 If the ignition relay cannot turn OFF due to contact seizure, it activates the tail lamp relay for 10 minutes to
alert the user to the ignition relay malfunction when the ignition switch is turned OFF.
FRONT WIPER CONTROL
IPDM E/R detects front wiper stop position by a front wiper auto stop signal.
When a front wiper auto stop signal is in the conditions listed below, IPDM E/R stops power supply to wiper
after repeating a front wiper 10 seconds activation and 20 seconds stop five times.
Control part Fail-safe operation
Cooling fan Turns ON the cooling fan relay-2 and the cooling fan relay-3 when ignition switch is
turned ON (Cooling fan operates at HI)
 Turns OFF the cooling fan relay-1, the cooling fan relay-2 and the cooling fan relay-3
when the ignition switch is turned OFF (Cooling fan does not operate)
A/C compressor A/C relay OFF
Alternator Outputs the power generation command signal (PWM signal) 0%
Control part Fail-safe operation
Headlamp Turns ON the headlamp low relay when the ignition switch is turned ON
 Turns OFF the headlamp low relay when the ignition switch is turned OFF
 Headlamp high relay OFF
Parking lamps
 License plate lamps
 Illuminations
 Tail lamps Turns ON the tail lamp relay when the ignition switch is turned ON
 Turns OFF the tail lamp relay when the ignition switch is turned OFF
Front wiper The status just before activation of fail-safe control is maintained until the ignition
switch is turned OFF while the front wiper is operating at LO or HI speed.
 The wiper is operated at LO speed until the ignition switch is turned OFF if the fail-
safe control is activated while the front wiper is set in the INT mode and the front wiper
motor is operating.
Front fog lamps Front fog lamp relay OFF
Horn Horn OFF
Ignition relay The status just before activation of fail-safe is maintained.
Starter motor Starter control relay OFF
Steering lock unit Steering lock relay OFF
Headlamp washer relay Headlamp washer relay OFF
Voltage judgment
IPDM E/R judgment Operation
Ignition relay contact sideIgnition relay excitation coil
side
ON ON Ignition relay ON normal —
OFF OFF Ignition relay OFF normal —
ON OFF Ignition relay ON stuck Detects DTC “B2098: IGN RELAY ON”
 Turns ON the tail lamp relay for 10 min-
utes
OFF ON Ignition relay OFF stuck Detects DTC “B2099: IGN RELAY OFF”

S E C -192
< SYMPTOM DIAGNOSIS >[INTELLIGENT KEY SYSTEM]
SECURITY CONTROL SYSTEM
SYMPTOM DIAGNOSIS
SECURITY CONTROL SYSTEM
Symptom TableINFOID:0000000003815090
The engine start function, door lock function, power distribution system and NATS-IVIS/NVIS in the Intelligent
Key system are closely related to each other regarding control. Narrow down the functional area in question
by performing following table to identify which function is malfunctioning. The vehicle security function can
operate only when the door lock and power distribution system are operating normally. Therefore, it is easy to
identify any factor unique to the vehicle security system by performing following table.
Use the chart below to help you find the cause of the symptom. The numbers indicate the order of the inspec-
tion.
NOTE:
Before starting vehicle security system operation check, the following conditions must be met.
 Open front windows
 Turn ignition switch OFF
 Pull out Intelligent Key from key slot.
NO. Function Operation condition Symptom Diagnostic ItemReference
page
1INTELLIGENT
KEY SYSTEM/
DOOR LOCK
FUNCTIONLock/unlock door with door re-
quest switch.
(Intelligent Key is into the out-
side key antenna detection ar-
ea)Door does not lock/unlock —DLK-158
2POWER DIS-
TRIBUTION
FUNCTIONPress push-button ignition
switch under the following con-
dition.
 Selector lever position is in
the P or N position.
 Do not depress brake pedal.Push-button ignition switch is
not operated—PCS-124
3INTELLIGENT
KEY SYSTEM/
ENGINE START
FUNCTIONStart engine with Intelligent Key
into the vehicle (inside key an-
tenna detection area)Engine can not start with Intel-
ligent Key—SEC-193
4Open the door after ignition
switch is turned ON to OFF.Steering is not locked —SEC-194
5NISSAN VEHI-
CLE IMMOBI-
LIZER
SYSTEM-NATS
FUNCTIONStart engine with Intelligent Key
into the key slot.Engine can not start (Intelli-
gent Key into the key slot)—SEC-195
6Insert Intelligent Key into the
key slot.Key slot indicator does not illu-
minate—SEC-201
7VEHICLE SE-
CURITY SYS-
TEMLock all doors with Intelligent
Key or door request switchVehicle security system can
not be setIntelligent keySEC-197
Door request switchSEC-197
Lock all doors with Intelligent
Key or door request switchSecurity indicator lamp does
not turn ON—SEC-196
In the armed phase, open the
doorVehicle security alarm does
not activate—SEC-199
When alarm sounds, press In-
telligent Key button
Vehicle security system can
not be canceledIntelligent KeySEC-200
When alarm sounds, press door
request switchDoor request switchSEC-200
8POWER DIS-
TRIBUTION
FUNCTIONPress push-button ignition
switch under the following con-
ditions.
 Selector lever position is in
the P or N position.
 Do not depress brake pedal.Push-button ignition switch
position indicator does not
turn on —PCS-125

SEC-202
< PRECAUTION >[INTELLIGENT KEY SYSTEM]
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000003940028
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. Information necessary to service the system safely is included in the “SRS AIRBAG” and
“SEAT BELT” of this Service Manual.
WARNING:
 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 must be performed by
an authorized NISSAN/INFINITI dealer.
 Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal
injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag
Module, see the “SRS AIRBAG”.
 Never use electrical test equipment on any circuit related to the SRS unless instructed to in this Ser-
vice Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or harness
connectors.
Precaution for Procedure without Cowl Top CoverINFOID:0000000003940027
When performing the procedure after removing cowl top cover, cover
the lower end of windshield with urethane, etc.
Precaution Necessary for Steering Wheel Rotation after Battery Disconnect
INFOID:0000000003940026
NOTE:
 Before removing and installing any control units, first turn the push-button ignition switch to the LOCK posi-
tion, then disconnect both battery cables.
 After finishing work, confirm that all control unit connectors are connected properly, then re-connect both
battery cables.
 Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If a DTC is detected, perform trouble diagnosis according to self-diagnosis results.
This vehicle is equipped with a push-button ignition switch and a steering lock unit.
If the battery is disconnected or discharged, the steering wheel will lock and cannot be turned.
If turning the steering wheel is required with the battery disconnected or discharged, follow the procedure
below before starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables.
NOTE:
Supply power using jumper cables if battery is discharged.
2. Turn the push-button ignition switch to ACC position.
(At this time, the steering lock will be released.)
3. Disconnect both battery cables. The steering lock will remain released with both battery cables discon-
nected and the steering wheel can be turned.
4. Perform the necessary repair operation.
PIIB3706J

SR-2
< PRECAUTION >
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000003838497
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. Information necessary to service the system safely is included in the “SRS AIRBAG” and
“SEAT BELT” of this Service Manual.
WARNING:
• 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 must be performed by
an authorized NISSAN/INFINITI dealer.
 Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal
injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag
Module, see the “SRS AIRBAG”.
 Never use electrical test equipment on any circuit related to the SRS unless instructed to in this Ser-
vice Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or harness
connectors.
Precaution Necessary for Steering Wheel Rotation after Battery Disconnect
INFOID:0000000003838498
NOTE:
 Before removing and installing any control units, first turn the push-button ignition switch to the LOCK posi-
tion, then disconnect both battery cables.
 After finishing work, confirm that all control unit connectors are connected properly, then re-connect both
battery cables.
 Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If a DTC is detected, perform trouble diagnosis according to self-diagnosis results.
This vehicle is equipped with a push-button ignition switch and a steering lock unit.
If the battery is disconnected or discharged, the steering wheel will lock and cannot be turned.
If turning the steering wheel is required with the battery disconnected or discharged, follow the procedure
below before starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables.
NOTE:
Supply power using jumper cables if battery is discharged.
2. Turn the push-button ignition switch to ACC position.
(At this time, the steering lock will be released.)
3. Disconnect both battery cables. The steering lock will remain released with both battery cables discon-
nected and the steering wheel can be turned.
4. Perform the necessary repair operation.
5. When the repair work is completed, re-connect both battery cables. With the brake pedal released, turn
the push-button ignition switch from ACC position to ON position, then to LOCK position. (The steering
wheel will lock when the push-button ignition switch is turned to LOCK position.)
6. Perform self-diagnosis check of all control units using CONSULT-III.
ServiceINFOID:0000000003751420
 Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
 Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 min-
utes.
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
elapsed.

SRC-34
< COMPONENT DIAGNOSIS >
B1050 DRIVER AIRBAG MODULE
B1050 DRIVER AIRBAG MODULE
DescriptionINFOID:0000000003813960
For driver air bag module, crash is judged by main “G” sensor output signal and safing algorithm in front direc-
tion.
OPERATION
In case of frontal collision whose acceleration exceeds the specified level, the ignition materials are ignited by
electric ignition system. The system burns the gas generating materials resulting in a chemical reaction. This
generates hot gases that flow into the air bag through a filter and expand the bag.
STRUCTURE
Driver air bag module mainly consists of air bag and inflator which inflates air bag.
INSTALLATION
Driver air bag module is installed on the center of steering wheel with fixed bolts.
DTC LogicINFOID:0000000003813961
DTC CONFIRMATION PROCEDURE
1.CHECK SELF-DIAG RESULT
With CONSULT-III
1. Turn ignition switch ON.
2. Perform “AIR BAG” Self Diagnostic Result.
Without CONSULT-III
1. Turn ignition switch ON.
2. Check the air bag warning lamp status. Refer to SRC-10, "
Air Bag Warning Lamp Diagnosis".
NOTE:
SRS does not enter Diagnosis mode if no malfunction is detected in User mode.
Is malfunctioning part detected?
YES >> Refer to SRC-34, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000003813962
WARNING:
 Before servicing, turn ignition switch OFF, disconnect battery negative terminal and wait at least 3
minutes. (To discharge backup capacitor.)
 Never use unspecified tester or other measuring device.
1.CHECK HARNESS CONNECTOR
Check the harness connector.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Replace harness connector.
2.CHECK WIRING HARNESS
Check the wiring harness externals.
Is the inspection result normal?
YES >> GO TO 3.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
B1050 DRIVER AIRBAG MOD-
ULE
[VB-SHORT]Driver air bag module circuit is shorted
to some power supply circuit
(including the spiral cable) Disconnection of wiring harness and
short
 Malfunction in driver air bag module
 Malfunction in spiral cable
 Malfunction in air bag diagnosis sen-
sor unit

ST-1
STEERING
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SECTION ST
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B
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CONTENTS
STEERING SYSTEM
SYMPTOM DIAGNOSIS ..... ..........................2
NOISE, VIBRATION AND HARSHNESS
(NVH) TROUBLESHOOTING ........................ .....
2
NVH Troubleshooting Chart ................................ ......2
PRECAUTION ...............................................3
PRECAUTIONS .............................................. .....3
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
3
Precaution Necessary for Steering Wheel Rota-
tion after Battery Disconnect .....................................
3
Service Notice or Precautions for Steering System
......
3
PREPARATION ............................................5
PREPARATION .............................................. .....5
Special Service Tools .......................................... ......5
ON-VEHICLE MAINTENANCE .....................7
POWER STEERING FLUID ........................... .....7
Inspection ............................................................ ......7
STEERING WHEEL .............................................9
Inspection ............................................................ ......9
ON-VEHICLE REPAIR .................................12
STEERING WHEEL ........................................ ....12
Exploded View .................................................... ....12
Removal and Installation .........................................12
STEERING COLUMN .........................................13
Exploded View .................................................... ....13
Removal and Installation .........................................13
Inspection ................................................................14
LOWER SHAFT ................................................16
Exploded View ..................................................... ....16
Removal and Installation .........................................16
Inspection ................................................................17
STEERING GEAR AND LINKAGE ...................18
Exploded View .........................................................18
Removal and Installation .........................................19
Disassembly and Assembly .....................................20
Inspection ................................................................26
POWER STEERING OIL PUMP .......................28
Exploded View .........................................................28
Removal and Installation .........................................29
Disassembly and Assembly .....................................29
Inspection ................................................................32
HYDRAULIC LINE ............................................34
Exploded View .........................................................34
Removal and Installation .........................................35
SERVICE DATA AND SPECIFICATIONS
(SDS) ............... .............................................
37
SERVICE DATA AND SPECIFICATIONS
(SDS) .................................................................
37
General Specifications ......................................... ....37
Steering Wheel Axial End Play and Play .................37
Steering Wheel Turning Force .................................37
Steering Angle .........................................................37
Steering Column Length ..........................................37
Steering Column Mounting Dimensions ..................37
Steering Column Operating Range .........................37
Lower Shaft Sliding Range ......................................38
Rack Sliding Force ..................................................38
Rack Stroke .............................................................38
Socket Swing Force and Rotating Torque ...............38
Socket Axial End Play .............................................38
Inner Socket Length ................................................38
Relief Oil Pressure ...................................................38

PRECAUTIONS
ST-3
< PRECAUTION >
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MA
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PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000003971958
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. Information necessary to service the system safely is included in the “SRS AIRBAG” and
“SEAT BELT” of this Service Manual.
WARNING:
• 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 must be performed by
an authorized NISSAN/INFINITI dealer.
 Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal
injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag
Module, see the “SRS AIRBAG”.
 Never use electrical test equipment on any circuit related to the SRS unless instructed to in this Ser-
vice Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or harness
connectors.
Precaution Necessary for Steering Wheel Rotation after Battery Disconnect
INFOID:0000000003806307
NOTE:
 Before removing and installing any control units, first turn the push-button ignition switch to the LOCK posi-
tion, then disconnect both battery cables.
 After finishing work, confirm that all control unit connectors are connected properly, then re-connect both
battery cables.
 Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If a DTC is detected, perform trouble diagnosis according to self-diagnosis results.
This vehicle is equipped with a push-button ignition switch and a steering lock unit.
If the battery is disconnected or discharged, the steering wheel will lock and cannot be turned.
If turning the steering wheel is required with the battery disconnected or discharged, follow the procedure
below before starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables.
NOTE:
Supply power using jumper cables if battery is discharged.
2. Carry the Intelligent Key or insert it to the key slot and turn the push-button ignition switch to ACC position.
(At this time, the steering lock will be released.)
3. Disconnect both battery cables. The steering lock will remain released with both battery cables discon-
nected and the steering wheel can be turned.
4. Perform the necessary repair operation.
5. When the repair work is completed, re-connect both battery cables. With the brake pedal released, turn
the push-button ignition switch from ACC position to ON position, then to LOCK position. (The steering
wheel will lock when the push-button ignition switch is turned to LOCK position.)
6. Perform self-diagnosis check of all control units using CONSULT-III.
Service Notice or Precautions for Steering SystemINFOID:0000000003806308
CAUTION:
 In case of removing steering gear assembly, make the final tightening with grounded and unloaded
vehicle condition, and then check wheel alignment.
 Observe the following precautions when disassembling.
- Before disassembly, thoroughly clean the outside of the unit.
- 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.

POWER STEERING FLUID
ST-7
< ON-VEHICLE MAINTENANCE >
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ON-VEHICLE MAINTENANCE
POWER STEERING FLUID
InspectionINFOID:0000000003826225
FLUID LEVEL
1. Check fluid level with engine stopped.
2. Ensure that fluid level is between MIN and MAX.
3. Fluid levels at HOT and COLD are different. Do not confuse
them.
CAUTION:
 The fluid level should not exceed the MAX line. Excessive fluid causes fluid leakage from the
cap.
 Never reuse drained power steering fluid.
FLUID LEAKAGE
Check hydraulic connections for fluid leakage, cracks, damage,
looseness, or wear.
1. Run the engine until the fluid temperature reaches 50 to 80°C
(122 to 176°F) in reservoir tank, and keep engine speed idle.
2. Turn steering wheel several times from full left stop to full right
stop.
3. Hold steering wheel at each lock position for five seconds and
carefully check for fluid leakage.
CAUTION:
Never hold the steering wheel in a locked position for more
than 10 seconds. (There is the possibility that power steer-
ing oil pump assembly may be damaged.)
4. If fluid leakage at connections is noticed, then loosen flare nut and then retighten. Do not overtighten con-
nector as this can damage O-ring, washer and connector.
5. If fluid leakage from oil pump is noticed, check oil pump. Refer to ST-32, "
Inspection".
6. Check steering gear boots for accumulation of fluid leaked from steering gear.
AIR BLEEDING HYDRAULIC SYSTEM
If air bleeding is not complete, the following symptoms can be observed.
 Bubbles are created in reservoir tank.
 Clicking noise can be heard from oil pump.
 Excessive buzzing in the oil pump.
NOTE:
Fluid noise may occur in the steering gear or oil pump. This does not affect performance or durability of the
system.
1. Turn steering wheel several times from full left stop to full right stop with engine off.
CAUTION:
Fill reservoir tank with a sufficient amount of fluid so that fluid level is not below the MIN line while
turning steering wheel.
2. Start the engine and hold steering wheel at each lock position for 3 second at idle to check for fluid leak-
age.HOT (A) : Fluid temperature 50 – 80°C (122 – 176°F)
COLD (B) : Fluid temperature 0 – 30°C (32 – 86°F)
Recommended fluid : Refer to MA-11, "
Fluids
and Lubricants".
Fluid capacity : Refer to ST-37, "
General
Specifications".
ALGIA0002GB
SGIA0506E