NISSAN TEANA 2014 Service Manual

ST-48
< SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
RACK SLIDING FORCE
Power Steering Oil PumpINFOID:0000000009461285
Power Steering FluidINFOID:0000000009461286
P215/60R16 P215/55R17 - P245/45R18
Rack stroke in neutral position (L) 72.5 mm (2.9in) 70.0 mm (2.8in)
Average 330 N (33.7 kg, 74.2 lb)
Relief oil pressure
9,700 - 10,300 kPa (98.9 - 105.1 kg/cm2, 1406.5 - 1493.5 psi)
Fluid type E-PSF
Fluid capacity 1.1 (1-1/8 US qt, 1 lmp qt)
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STC-1
STEERING
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CONTENTS
STEERING CONTROL SYSTEM
PRECAUTION ................ ...............................3
PRECAUTIONS .............................................. .....3
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
3
Service Notice and Precautions for Hydraulic
Pump Electric Power Steering System ............... ......
3
SYSTEM DESCRIPTION ..............................4
COMPONENT PARTS ................................... .....4
Component Parts Location .................................. ......4
Component Description .............................................4
Power Steering Oil Pump Assembly .........................5
SYSTEM ..............................................................6
HYDRAULIC PUMP ELECTRIC POWER STEER-
ING SYSTEM ........ ................................. ......................
6
HYDRAULIC PUMP ELECTRIC POWER
STEERING SYSTEM : System Description ..............
6
HYDRAULIC PUMP ELECTRIC POWER
STEERING SYSTEM : Fail-sa fe ......................... ......
8
HYDRAULIC PUMP ELECTRIC POWER
STEERING SYSTEM : Protec tion Function ..............
9
DIAGNOSIS SYSTEM (POWER STEERING
CONTROL MODULE) .................................... ....
10
CONSULT Function ............................................ ....10
ECU DIAGNOSIS INFORMATION ..............11
POWER STEERING CONTROL MODULE .... ....11
Reference Value ................................................. ....11
Fail-safe ..................................................................12
Protection Function .................................................12
DTC Inspection Priority Chart ............................. ....13
DTC Index ........................................................... ....13
WIRING DIAGRAM ......................................14
HYDRAULIC PUMP ELECTRIC POWER
STEERING SYSTEM .........................................
14
Wiring Diagram .................................................... ....14
BASIC INSPECTION ...................................19
DIAGNOSIS AND REPAIR WORK FLOW .......19
Work Flow ............................................................ ....19
Diagnostic Work Sheet ............................................20
DTC/CIRCUIT DIAGNOSIS .........................22
C1143 STEERING ANGLE SENSOR ...............22
DTC Logic ............................................................ ....22
Diagnosis Procedure ...............................................22
C1601 BATTERY POWER SUPPLY ................23
DTC Logic ................................................................23
Diagnosis Procedure ...............................................23
C1602 NO TUNING SET ...................................26
DTC Logic ................................................................26
Diagnosis Procedure ...............................................26
C1606 EPS MOTOR ..........................................27
DTC Logic ................................................................27
Diagnosis Procedure ...............................................27
C1607, C1608 POWER STEERING CON-
TROL MODULE ................................................
28
DTC Logic ............................................................ ....28
Diagnosis Procedure ...............................................28
C160A HEAT PROTECTION ............................29
DTC Logic ................................................................29
U1000 CAN COMM CIRCUIT ...........................30
Description ...............................................................30
DTC Logic ................................................................30
Diagnosis Procedure ...............................................30
HYDRAULIC PUMP ELECTRIC POWER
STEERING WARNING LAMP ...........................
31
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STC-2
Component Function Check ...................................31
Diagnosis Procedure ..............................................31
SYMPTOM DIAGNOSIS .............................32
HYDRAULIC PUMP ELECTRIC POWER
STEERING WARN ING LAMP DOES NOT
TURN ON ........................................................ ...
32
Description ........................................................... ...32
Diagnosis Procedure ..............................................32
HYDRAULIC PUMP ELECTRIC POWER
STEERING WARN ING LAMP DOES NOT
TURN OFF ...................................................... ...
33
Description ........................................................... ...33
Diagnosis Procedure ..............................................33
STEERING WHEEL TURNING FORCE IS
HEAVY OR LIGHT .......................................... ...
34
Diagnosis Procedure ............................................ ...34
UNBALANCE STEERING WHEEL TURNING
FORCE AND RETURN BETWEEN RIGHT
AND LEFT ...................................................... ...
36
Diagnosis Procedure ............................................ ...36
UNBALANCE STEERING WHEEL TURNING
FORCE (TORQUE VARIATION) .................... ...
37
Diagnosis Procedure ............................................ ...37
UNIT REMOVAL AND INSTALLATION ....39
POWER STEERING CONTROL MODULE .......39
Removal and Installation .........................................39
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PRECAUTIONSSTC-3
< PRECAUTION >
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PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000009951730
The Supplemental Restraint System such as “A IR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severi ty of injury to the driver and front passenger for certain
types of collision. Information necessary to service t he system safely is included in the SR and SB section of
this Service Manual.
WARNING:
• To avoid rendering the SRS inoper ative, 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 in correct removal and installation of the SRS, can lead to personal
injury caused by unintentional act ivation of the system. For removal of Spiral Cable and Air Bag
Module, see the SR section.
• Do not use electrical test equipm ent on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identi fied by yellow and/or orange harnesses or har-
ness connectors.
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING:
• When working near the Airbag Diagnosis Sensor Un it or other Airbag System sensors with the Igni-
tion ON or engine running, DO NOT use air or el ectric power tools or strike near the sensor(s) with a
hammer. Heavy vibration could activate the sensor( s) and deploy the air bag(s), possibly causing
serious injury.
• When using air or electric power tools or hammers , always switch the Ignition OFF, disconnect the
battery and wait at least three mi nutes before performing any service.
Service Notice and Precautions for Hydrau lic Pump Electric Power Steering System
INFOID:0000000009460340
• Check each tire for proper air pressure and size. Refer to WT-60, "Tire".
• Verify that the steering system components are G enuine NISSAN parts and have been installed properly.
• Check the steering column for loose mounting bolts.
• Check the steering gear assembly for loose mounting bolts. Check the inner sockets and outer sockets for
damage or wear. Inspect the boots and seals for leakage of power steering fluid.
• Verify proper wheel alignment. Refer to FSU-7, "Inspection and Adjustment"
.
• Check for any damage, wear, or modification to the suspension and body that would result in increased
weight or an improper wheelarch height. Refer to FSU-26, "Wheelarch Height (Unladen*
1)".
• Check for proper battery voltage.
• Verify that all power steering pump assembly connections are clean and fully seated.
• Verify that only Genuine NISSAN E-PSF is used. Use of any power steering fluid other than Genuine NIS-
SAN E-PSF will prevent the power st eering system from proper operation.
• An audible high pitch noise may be heard from the engine compartment when the steering wheel is oper-
ated, particularly at low speeds such as a parking lot maneuver. This condition is not a malfunction, rather
normal system operation. Steering at low speeds or parking lot maneuvers demands higher hydraulic assis-
tance, resulting in larger power st eering pump load and increased system noise.
• The power steering pump is electrically controlled by the power steering control module.
• Before connecting or disconnecting the power steeri ng control module harness connectors, turn ignition
switch “OFF” and disconnect battery ground cable. Batter y voltage is applied to power steering control mod-
ule even if ignition switch is turned “OFF”.
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STC-4
< SYSTEM DESCRIPTION >
COMPONENT PARTS
SYSTEM DESCRIPTION
COMPONENT PARTS
Component Parts LocationINFOID:0000000009460341
Component DescriptionINFOID:0000000009460342
1. Power steering oil pump assembly 2. Steering angle sensor(view with the steering wheel re-
moved) 3. ECM
4. Combination meter 5. EPS warning light
ALGIA0128ZZ
Component parts Reference
Power steering oil pump assembly STC-5, "Power Steering Oil Pump Assembly"
Steering angle sensorTransmits steering angle sensor signal to the power steering control module via CAN commu-
nication.
ECM Transmits engine speed signal to the power steering control module via CAN communication.
Combination meter Transmits vehicle speed signal to the power steering control module via CAN communication.
The combination meter also di splays the EPS warning light.
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COMPONENT PARTSSTC-5
< SYSTEM DESCRIPTION >
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Power Steering Oil Pump AssemblyINFOID:0000000009460343
The power steering oil pump assembly is primarily composed of the
reservoir tank (1), power steering oil pump (2), power steering motor
(3), and power steering control module (4).
RESERVOIR TANK
Fluid is filled from the reservoir tank.
POWER STEERING OIL PUMP
The power steering oil pump is driven by the power steer ing motor and generates hydraulic oil pressure in the
system.
POWER STEERING MOTOR
The power steering motor is controll ed by the power steering control module and drives the power steering oil
pump.
POWER STEERING CONTROL MODULE
By receiving steering angle sensor signal and vehicle speed signal, the power steering control module calcu-
lates hydraulic pressure of the hydraulic pump electric power steering system according to the driving condi-
tions. The power steering control modul e controls the power steering motor.
JSGIA0914ZZ
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STC-6
< SYSTEM DESCRIPTION >
SYSTEM
SYSTEM
HYDRAULIC PUMP ELECTRIC POWER STEERING SYSTEM
HYDRAULIC PUMP ELECTRIC POWER ST EERING SYSTEM : System Description
INFOID:0000000009460344
• The system is composed primarily of the power steeri ng oil pump assembly (power steering control module,
power steering motor, power steering oil pump, and reservoir tank), hydraulic pipes, and steering gear
assembly.
• The power steering control module controls the speed of the power steering motor according to the vehicle
speed and steering angle speed. By changing the power st eering oil pump flow, the power steering control
module controls the steering assist force.
• According to the power steering motor control, the sy stem hydraulic pressure is transmitted from the power
steering motor to power steering oil pump. The power steering oil pump is driven by the system hydraulic
pressure.
• After engine start, the hydraulic pump electric power steering system performs control.
• When a malfunction occurs in the system, the fail-safe function stops the hydraulic pump electric power
steering system (manual steering state) or restricts it s operation (certain steering assist force). Refer to STC-
8, "HYDRAULIC PUMP ELECTRIC POWER STEERING SYSTEM : Fail-safe".
• When the power steering function is used continuously in an extreme manner, the protective function
reduces the output to the power steering motor. Refer to STC-9, "HYDRAULIC PUMP ELECTRIC POWER
STEERING SYSTEM : Protection Function".
SYSTEM DIAGRAM
INPUT/OUTPUT SIGNAL
Communicates the signal from each control unit via CAN communication.
OPERATION CHARACTERISTICS
ALGIA0127GB
Control unit Signal status
ECM Transmits engine status signal to power steering control module via CAN communication.
Steering angle sensor Transmits steering angle sensor signal to power steering control module via CAN commu-
nication.
Combination meter Transmits vehicle speed signal to power steering control module via CAN communication.
Receives hydraulic pump electric power steering warning lamp signal from power steering
control module via CAN communication.
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SYSTEMSTC-7
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When the steering angle speed is high or the vehicle speed is low,
force is generated by increasing discharge amount from the power
steering oil pump and by raising system hydraulic pressure.
OPERATION PRINCIPLE
When Steering Wheel is in the Neutral Position
Because the hydraulic routes open at the power steeri ng pump, gear housing right side, gear housing left side,
and reservoir tank, the hydraulic pressure applied to the right side and left side of the gear housing is equal
and no steering assist force is generated.
When Steering Wheel is Rotated to the Right
The hydraulic routes open from power steering pump to gear housing right side and from gear housing left
side to reservoir tank, providing left direction assist force to the rack.
JSGIA0916GB
JSGIA0918GB
JSGIA0919GB
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STC-8
< SYSTEM DESCRIPTION >
SYSTEM
When Steering Wheel is Rotated to the Left
The hydraulic routes open from power steering pump to gear housing left side and from gear housing right
side to reservoir tank, providing right direction assist force to the rack.
CONDITIONS FOR HYDRAULIC PUMP ELECTR IC POWER STEERING WARNING LAMP ON
• When the hydraulic pump electric power steering syst em is operating and steering assist force is being gen-
erated, the hydraulic pump electric power steering warning lamp is OFF.
• When the hydraulic pump electric power steering system is stopped by the fail-safe or protective function
and steering assist force is not being generated, the hy draulic pump electric power steering warning lamp
turns ON to inform the driver that t he system is in the manual steering state.
NOTE:
When the hydraulic pump electric power steering system warning lamp turns ON according to the protection
system, the cause is internal high temperature state of the hydraulic pump electric power steering system.
By stopping the engine, internal temperature of the s ystem decreases. After starting the engine, the system
returns to the normal state and the hydraulic pump elec tric power steering system warning lamp turns OFF.
(The system is not malfunctioning.) For informat ion about the protective function, refer to STC-9, "HYDRAU-
LIC PUMP ELECTRIC POWER STEERING SYSTEM : Protection Function".
• When the ignition switch is turned ON, this lamp turn s ON for lamp check (system check). When the system
is operating normally, the lamp turns OFF after the engine starts.
HYDRAULIC PUMP ELECTRIC POWE R STEERING SYSTEM : Fail-safeINFOID:0000000009460345
When an error occurs in the hydraulic pump electric pow er steering system, fail-safe brings the system to a
halt (manual steering) or restricted (constant steering assi st level) state. When the system is in a halt state,
fail-safe turns ON the hydraulic pump electric power steer ing warning lamp to warn the driver that the hydrau-
lic pump electric power steering system is in the manual steering state.
JSGIA0917GB
Condition Hydraulic pump electric power steering warning lamp
Ignition switch ON. (Lamp check) ON
After engine start (steering assist force is generated) OFF
When steering assist is stopped ON
DTC Fail-safe condition
C1143 Certain steering assist force
C1601 Manual steering state
C1606 Manual steering state
C1607 Certain steering assist force
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SYSTEMSTC-9
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HYDRAULIC PUMP ELECTRIC POWER STEE RING SYSTEM : Protection Function
INFOID:0000000009460346
• When the steering wheel is operated repeatedly or turned all the way for a long period during parking or low
speed driving, the function of the hydraulic pump elec tric power steering system becomes limited to prevent
the system from overheating. Cont inued operation of the steering wheel will cause the hydraulic pump elec-
tric power steering system to stop and the hydraulic pum p electric power steering system warning lamp may
come ON. In this case, the steering wheel operation temporarily becomes hard. This is not a malfunction.
When the engine is turned OFF (ignition switch OFF) and steering operation is stopped for a while, the tem-
perature of the hydraulic pump electric power steer ing system decreases and the steering operation returns
to normal after restarting the engine.
• Then, the hydraulic pump electric power steering syste m warning lamp turns OFF. If the system is OFF
under the protection state, the hydraulic pump electr ic power steering system warning lamp turns ON to
warn that the system is in the manual steering state. (This is not a system malfunction.) In addition, the fol-
lowing DTC remains to distinguish from malfunction.
C1608 Manual steering state
U1000 Normal control
NOTE:
If the cause is in a different ECU, the state changes to fixed steering assist force.
DTC Fail-safe condition
DTC vehicle condition
C160A The system temporarily enters the manual steering state. (This is not a hydraulic pump electric
power steering system malfunction.)
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