Nissan Quest E52. Manual - part 1178

 

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Nissan Quest E52. Manual - part 1178

 

 

STC-1

STEERING

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SECTION 

STC

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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

Precautions for Removing Battery Terminal  .............

3

Service Notice and Precautions for Hydraulic 
Pump Electric Power Steering System  ...................
..

3

SYSTEM DESCRIPTION  ..............................

5

COMPONENT PARTS  ........................................

5

Component Parts Location ........................................

5

Power Steering Oil Pump Assembly  .........................

6

SYSTEM ..............................................................

7

HYDRAULIC PUMP ELECTRIC POWER STEER-
ING SYSTEM  .............................................................
..

7

HYDRAULIC PUMP ELECTRIC POWER 
STEERING SYSTEM : System Description  ............
..

7

HYDRAULIC PUMP ELECTRIC POWER 
STEERING SYSTEM : Fail-safe .............................
..

9

HYDRAULIC PUMP ELECTRIC POWER 
STEERING SYSTEM : Protection Function  ............

10

DIAGNOSIS SYSTEM (POWER STEERING 
CONTROL MODULE)  ........................................

11

CONSULT Function  ................................................

11

ECU DIAGNOSIS INFORMATION ..............

12

POWER STEERING CONTROL MODULE ........

12

Reference Value  .....................................................

12

Fail-safe ..................................................................

13

Protection Function  .................................................

13

DTC Inspection Priority Chart  .................................

14

DTC Index  ...............................................................

14

WIRING DIAGRAM  ......................................

15

HYDRAULIC PUMP ELECTRIC POWER 
STEERING SYSTEM .........................................

15

Wiring Diagram ........................................................

15

BASIC INSPECTION  ...................................

17

DIAGNOSIS AND REPAIR WORK FLOW  .......

17

Work Flow ................................................................

17

Diagnostic Work Sheet  ............................................

18

DTC/CIRCUIT DIAGNOSIS  .........................

20

C1143 STEERING ANGLE SENSOR  ...............

20

DTC Logic ................................................................

20

Diagnosis Procedure  ...............................................

20

C1601 BATTERY POWER SUPPLY  ................

21

DTC Logic ................................................................

21

Diagnosis Procedure  ...............................................

21

C1602 NO TUNING SET  ...................................

24

DTC Logic ................................................................

24

Diagnosis Procedure  ...............................................

24

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

PRECAUTIONS

STC-3

< PRECAUTION >

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PRECAUTION

PRECAUTIONS

Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT 
PRE-TENSIONER"

INFOID:0000000009650853

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. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the “SRS AIR BAG” and “SEAT BELT” of this
Service Manual.

WARNING:

Always observe the following items for preventing accidental activation.
• To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in

the event of a collision that 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 “SRS AIR BAG”.

• 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.

PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS

WARNING:

Always observe the following items for preventing accidental activation.
• When working near the Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the

ignition ON or engine running, never use air or electric 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 3 minutes before performing any service.

Precautions for Removing Battery Terminal

INFOID:0000000009995622

•  When removing the 12V battery terminal, turn OFF the ignition

switch and wait at least 30 seconds.
NOTE:
ECU may be active for several tens of seconds after the ignition
switch is turned OFF. If the battery terminal is removed before ECU
stops, then a DTC detection error or ECU data corruption may
occur.

•  For vehicles with the 2-batteries, be sure to connect the main bat-

tery and the sub battery before turning ON the ignition switch.
NOTE:
If the ignition switch is turned ON with any one of the terminals of
main battery and sub battery disconnected, then DTC may be
detected.

•  After installing the 12V battery, always check "Self Diagnosis Result" of all ECUs and erase DTC.

NOTE:
The removal of 12V battery may cause a DTC detection error.

Service Notice and Precautions for Hydraulic Pump Electric Power Steering System

INFOID:0000000009650854

• Check if air pressure and size of tires are proper, the specified part is used for the steering wheel is genuine

part.

SEF289H

STC-4

< PRECAUTION >

PRECAUTIONS

• Check if the connection of steering column assembly and steering gear assembly is proper (there is not

looseness of mounting bolts, damage of rods, boots or sealants, and leakage of grease, etc.).

• Check if the wheel alignment is adjusted properly.
• Check if there is any damage or modification to suspension or body resulting in increased weight or altered

ground clearance.

• Check if installation conditions of each link and suspension are proper.
• Check if the battery voltage is proper.
• Check connection conditions of each connector are proper.
• Check that NISSAN genuine power steering fluid (E-PSF) is used. If power steering fluid other than genuine

fluid is used, steering may become extremely hard.

• You may hear a high pitch noise from the front of the vehicle when the steering wheel is operated, especially

at low speed such as a parking lot. However this is not a malfunction. Steer at low speed condition makes
higher load for steering rack, so pump works higher rotation to provide more hydraulic flow to create more
power assistance for lighter steering effort. This pump rotation is electrically controlled based on rotation
map in ECU.

• Before connecting or disconnecting the power steering control module harness connector, turn ignition

switch “OFF” and disconnect battery ground cable. Because battery voltage is applied to power steering
control module even if ignition switch is turned “OFF”.

 

 

 

 

 

 

 

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