Nissan STEERING - User Manual

STC-1
STEERING
C
D
E
F
H
I
J
K
L
M
SECTION STC
A
B
STC
N
O
P
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 EPS System ......3
SYSTEM DESCRIPTION .............................. 5
COMPONENT PARTS ........................................ 5
Component Parts Location ........................................5
Component Description .............................................5
EPS Control Unit .......................................................6
EPS Motor .................................................................6
Torque Sensor ..........................................................6
Reduction Gear .........................................................6
SYSTEM .............................................................. 7
EPS SYSTEM ..............................................................7
EPS SYSTEM : System Description .........................7
EPS SYSTEM : Fail-Safe ..........................................8
EPS SYSTEM : Protection Function .........................8
DIAGNOSIS SYSTEM (EPS CONTROL UNIT)
.....
9
CONSULT Function ..................................................9
ECU DIAGNOSIS INFORMATION ..............11
EPS CONTROL UNIT .........................................11
Reference Value .....................................................11
Fail-Safe ..................................................................12
Protection Function ................................................. 13
DTC Inspection Priority Chart ................................. 13
DTC Index ............................................................... 13
WIRING DIAGRAM ......................................14
ELECTRONICALLY CONTROLLED POWER
STEERING SYSTEM ..........................................
14
Wiring Diagram ........................................................14
BASIC INSPECTION ...................................18
DIAGNOSIS AND REPAIR WORKFLOW ........18
Work Flow ................................................................18
Diagnostic Work Sheet ............................................19
DTC/CIRCUIT DIAGNOSIS .........................21
C1601 BATTERY POWER SUPPLY ................21
DTC Logic ................................................................21
Diagnosis Procedure ...............................................21
C1604 TORQUE SENSOR ................................24
DTC Logic ................................................................24
Diagnosis Procedure ...............................................24
C1606 EPS MOTOR ..........................................26
DTC Logic ................................................................26
Diagnosis Procedure ...............................................26
Component Inspection .............................................26
C1607, C1608 EPS CONTROL UNIT ...............28
DTC Logic ................................................................28
Diagnosis Procedure ...............................................28
C1609 VEHICLE SPEED SIGNAL ....................29
Description ...............................................................29
DTC Logic ................................................................29
Diagnosis Procedure ...............................................29
C1610 ENGINE STATUS SIGNAL ...................30
Description ...............................................................30
DTC Logic ................................................................30
Diagnosis Procedure ...............................................30
U1000 CAN COMM CIRCUIT ...........................31
Description ...............................................................31
DTC Logic ................................................................31
Diagnosis Procedure ...............................................31
EPS WARNING LAMP ......................................32
Revision: March 2013 2012 Versa Sedan

Summary

General Precautions

Safety Precautions

Covers precautions for SRS, Air Bag, Seat Belt Pre-tensioner, and use of power tools.

Service Notice and Precautions for EPS System

Provides specific service notices and precautions for the EPS system.

System Overview

Component Parts

Details the location and description of all component parts within the system.

EPS System Details

EPS System Overview

Describes the EPS system's function, including fail-safe, protection, diagrams, signals, and warning lamp.

EPS Control Unit Diagnosis

Diagnostic Functions

Details CONSULT functions, ECU ID, self-diagnosis, freeze frame data, and data monitor.

EPS Control Unit Information

Reference Values and Layout

Provides reference values for diagnosis and terminal layout of the EPS control unit.

DTC Information and Procedures

Covers protection function, DTC priority, and DTC index for EPS control unit.

Wiring Diagrams

System Schematics and Connectors

Illustrates the overall wiring diagram and details of system connectors.

Basic Inspection Procedures

Diagnosis and Repair Workflow

Outlines the detailed steps for diagnosing and repairing EPS system issues.

Diagnostic Work Sheet

Provides a template for customer interviews to gather symptom information.

C1601 Battery Power Supply Diagnosis

DTC Logic and Procedures

Explains DTC C1601 logic, confirmation, and reproduction procedures.

Diagnosis Procedure

Step-by-step guide to diagnose issues related to C1601 Battery Power Supply.

C1604 Torque Sensor Diagnosis

DTC Logic and Procedures

Explains DTC C1604 logic, confirmation, and reproduction procedures.

Diagnosis Procedure

Step-by-step guide to diagnose issues related to C1604 Torque Sensor.

C1606 EPS Motor Diagnosis

DTC Logic and Procedures

Explains DTC C1606 logic, confirmation, and reproduction procedures.

Diagnosis and Component Inspection

Covers diagnosis procedures and inspection for the EPS motor.

C1607, C1608 EPS Control Unit Diagnosis

DTC Logic and Procedures

Explains DTC C1607/C1608 logic, confirmation, and reproduction procedures.

Diagnosis Procedure

Step-by-step guide to diagnose C1607/C1608 EPS Control Unit malfunctions.

C1609 Vehicle Speed Signal Diagnosis

Signal Description and DTC Logic

Describes the vehicle speed signal and its associated DTC logic.

DTC Procedures and Diagnosis

Covers confirmation, reproduction, and diagnosis for C1609 Vehicle Speed Signal.

C1610 Engine Status Signal Diagnosis

Signal Description and DTC Logic

Describes the engine status signal and its associated DTC logic.

DTC Procedures and Diagnosis

Covers confirmation, reproduction, and diagnosis for C1610 Engine Status Signal.

U1000 CAN Comm Circuit Diagnosis

Circuit Description and DTC Logic

Describes the CAN communication circuit and its DTC logic.

DTC Procedures and Diagnosis

Covers confirmation, reproduction, and diagnosis for U1000 CAN Comm Circuit.

EPS Warning Lamp Diagnosis

Function Check and Procedures

Covers checking EPS warning lamp function and diagnostic procedures.

EPS Warning Lamp: Not Turning On

Symptom Description and Diagnosis

Explains the symptom of the EPS warning lamp not turning on and its diagnosis.

EPS Warning Lamp: Not Turning Off

Symptom Description and Diagnosis

Explains the symptom of the EPS warning lamp not turning off and its diagnosis.

Steering Force: Heavy or Light

Symptom Description

Describes the symptom of heavy or light steering wheel turning force.

Troubleshooting Steps

Provides comprehensive diagnostic steps for heavy or light steering force.

Unbalanced Steering Force & Return

Symptom Description

Describes unbalanced steering force and return between right and left.

Troubleshooting Steps

Provides diagnostic steps for unbalanced steering force and return.

Unbalanced Steering Force (Torque Variation)

Symptom Description

Describes unbalanced steering wheel turning force due to torque variation.

Troubleshooting Steps

Provides diagnostic steps for unbalanced steering force (torque variation).

EPS Control Unit Removal and Installation

Exploded View and Procedures

Shows the exploded view of the EPS control unit and details its removal/installation.

Nissan STEERING Specifications

General

Brand	Nissan
Model	STEERING
Category	Automobile
Language	English