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
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