2007 NISSAN TIIDA wiring

ST-2
< PRECAUTION >
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000001282485
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 SR and SB section 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 SR section.
 Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or har-
ness connectors.
Precaution Necessary for Steering Wheel Rotation After Battery Disconnect
INFOID:0000000001282486
NOTE:
 This procedure is applied only to models with Intelligent Key system and NATS (NISSAN ANTI-THEFT SYS-
TEM).
 Remove and install all control units after disconnecting both battery cables with the ignition switch in the
″LOCK″ position.
 Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If DTC is detected, perform trouble diagnosis according to self-diagnostic results.
For models equipped with the Intelligent Key system and NATS, an electrically controlled steering lock mech-
anism is adopted on the key cylinder.
For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and
steering wheel rotation will become impossible.
If steering wheel rotation is required when battery power is interrupted, 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. Use the Intelligent Key or mechanical key to turn the ignition switch to the ″ACC″ position. At this time, the
steering lock will be released.
3. Disconnect both battery cables. The steering lock will remain released and the steering wheel can be
rotated.
4. Perform the necessary repair operation.
5. When the repair work is completed, return the ignition switch to the ″LOCK″ position before connecting
the battery cables. (At this time, the steering lock mechanism will engage.)
6. Perform a self-diagnosis check of all control units using CONSULT-III.
Precaution for Steering SystemINFOID:0000000001282487
 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.
- For easier and proper assembly, place disassembled parts in order on a parts rack.

STC-1
STEERING
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SECTION STC
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STC
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CONTENTS
STEERING CONTROL SYSTEM
EPS
BASIC INSPECTION ....................................
3
DIAGNOSIS AND REPAIR WORKFLOW ..........3
Work Flow .................................................................3
FUNCTION DIAGNOSIS ...............................4
EPS SYSTEM ......................................................4
System Diagram ........................................................4
System Description ...................................................4
Component Parts Location ........................................5
Component Description .............................................6
CAN Communication .................................................6
DIAGNOSIS SYSTEM (EPS CONTROL UNIT)
.....
7
CONSULT-III Function (EPS) ...................................7
COMPONENT DIAGNOSIS ..........................9
C1601 BATTERY POWER SUPPLY ..................9
Description ................................................................9
DTC Logic .................................................................9
Diagnosis Procedure .................................................9
Special Repair Requirement (Models with ESP) .....10
C1604 TORQUE SENSOR .................................11
Description ..............................................................11
DTC Logic ...............................................................11
Diagnosis Procedure ...............................................11
Special Repair Requirement (Models with ESP) .....12
C1606 EPS MOTOR ...........................................13
Description ..............................................................13
DTC Logic ...............................................................13
Diagnosis Procedure ...............................................13
Special Repair Requirement (Models with ESP) .....14
C1607 EEPROM .................................................15
Description ..............................................................15
DTC Logic ................................................................15
Diagnosis Procedure ...............................................15
Special Repair Requirement (Models with ESP) .....15
C1608 EPS CONTROL UNIT ............................16
Description ...............................................................16
DTC Logic ................................................................16
Diagnosis Procedure ...............................................16
Special Repair Requirement (Models with ESP) .....16
C1609 CAN VHCL SPEED ...............................17
Description ...............................................................17
DTC Logic ................................................................17
Diagnosis Procedure ...............................................17
Special Repair Requirement (Models with ESP) .....18
C1610 CAN ENG RPM ......................................19
Description ...............................................................19
DTC Logic ................................................................19
Diagnosis Procedure ...............................................19
Special Repair Requirement (Models with ESP) .....19
U1000 CAN COMM CIRCUIT ...........................21
Description ...............................................................21
DTC Logic ................................................................21
Diagnosis Procedure ...............................................21
Special Repair Requirement (Models with ESP) .....21
ECU DIAGNOSIS .........................................22
EPS CONTROL UNIT .......................................22
EPS Control Unit Input/Output Signal Reference
Value .......................................................................
22
Wiring Diagram - EPS - ...........................................24
Fail-Safe Function ...................................................27
DTC Index ...............................................................28
SYMPTOM DIAGNOSIS ..............................29
EPS SYSTEM SYMPTOMS ..............................29
Symptom Chart ........................................................29

STC-6
< FUNCTION DIAGNOSIS >[EPS]
EPS SYSTEM
Component Description
INFOID:0000000001716729
CAN CommunicationINFOID:0000000001697716
SYSTEM DESCRIPTION
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.
For details, refer to LAN-30, "
CAN System Specification Chart".
Component parts Function
EPS control unit
(Electric power steering control unit) Outputs optimum assist torque signal to EPS motor.
 Reduces output signals to EPS motor and protects EPS motor and EPS control unit when us-
ing power steering continuously and excessively.
 As a fail-safe function, turned off output signal to EPS motor and then enters a manual steer-
ing state, if malfunction is detected in EPS system.
EPS motor Products assist torque by control signal from EPS control unit.
Torque sensor Detects steering wheel turning force and outputs sensor signal to EPS control unit.
Reduction gear Increases motor-produced assist torque by worm gear and transmits it to column shaft.
EPS warning lamp Illuminates if malfunction is detected in electrical system of EPS system.
ECMTransmits the following signals via CAN communication to EPS control unit.
 Engine status signal
ABS actuator and electric unit (con-
trol unit)Transmits the following signals via CAN communication to EPS control unit.
 Vehicle speed signal
Combination meterTransmits the following signals via CAN communication to EPS control unit.
 Vehicle speed signal

U1000 CAN COMM CIRCUIT
STC-21
< COMPONENT DIAGNOSIS >[EPS]
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STC
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U1000 CAN COMM CIRCUIT
DescriptionINFOID:0000000001716748
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.
DTC LogicINFOID:0000000001716749
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.CHECK SELF-DIAGNOSIS RESULTS
Check the self-diagnosis results.
Is above displayed on the self-diagnosis display?
YES >> Proceed to diagnosis procedure. Refer to STC-21, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000001697731
1.CHECK CAN COMMUNICATION CIRCUIT
With CONSULT-III
1. Turn ignition switch ON and start engine.
2. Select “SELF-DIAG RESULTS” mode for “EPS” with CONSULT-III.
3. Perform the self-diagnosis.
Is the
“CAN COMM CIRCUIT [U1000]” displayed?
YES >> Print out CONSULT-II screen and go to LAN-30, "CAN System Specification Chart".
NO >>INSPECTION END
Special Repair Requirement (Models with ESP)INFOID:0000000001730970
1.ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION
Always perform the neutral position adjustment for the steering angle sensor, when replacing the EPS control
unit. Refer to BRC-90, "
ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : Descrip-
tion".
>> END
DTC Display item Malfunction detected condition Possible cause
U1000 CAN COMM CIRCUITWhen EPS control unit is not transmitting or receiving
CAN communication signal for 2 seconds or more. Harness or connector
 CAN communication line
 EPS control unit
Self-diagnosis results
CAN COMM CIRCUIT

STC-24
< ECU DIAGNOSIS >[EPS]
EPS CONTROL UNIT
Wiring Diagram - EPS -
INFOID:0000000001697720
ALGWA0004GB

STC-36
< PRECAUTION >[EPS]
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000001697712
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 SR and SB section 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 SR section.
 Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or har-
ness connectors.
Precaution Necessary for Steering Wheel Rotation After Battery Disconnect
INFOID:0000000001716731
NOTE:
 This Procedure is applied only to models with Intelligent Key system and NATS (NISSAN ANTI-THEFT SYS-
TEM).
 Remove and install all control units after disconnecting both battery cables with the ignition knob in the
″LOCK″ position.
 Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If DTC is detected, perform trouble diagnosis according to self-diagnostic results.
For models equipped with the Intelligent Key system and NATS, an electrically controlled steering lock mech-
anism is adopted on the key cylinder.
For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and
steering wheel rotation will become impossible.
If steering wheel rotation is required when battery power is interrupted, 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. Use the Intelligent Key or mechanical key to turn the ignition switch to the ″ACC″ position. At this time, the
steering lock will be released.
3. Disconnect both battery cables. The steering lock will remain released and the steering wheel can be
rotated.
4. Perform the necessary repair operation.
5. When the repair work is completed, return the ignition switch to the ″LOCK″ position before connecting
the battery cables. (At this time, the steering lock mechanism will engage.)
6. Perform a self-diagnosis check of all control units using CONSULT-III.
Service Notice or Precaution for EPS SystemINFOID:0000000001697713
CAUTION:
Check or confirm the following item when performing the trouble diagnosis.
 Check any possible causes by interviewing the symptom and it’s condition from the customer if any
malfunction, such as EPS warning lamp turns ON, occurs.
 Check if air pressure and size of tires are proper, the specified part is used for the steering wheel,
and control unit is genuine part.

STR-1
ENGINE
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SECTION STR
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CONTENTS
STARTING SYSTEM
HR16DE
BASIC INSPECTION ....................................
3
DIAGNOSIS AND REPAIR WORKFLOW ..........3
Work Flow .................................................................3
FUNCTION DIAGNOSIS ...............................6
STARTING SYSTEM ...........................................6
System Diagram ........................................................6
System Description ...................................................6
Component Parts Location ........................................6
Component Description ............................................7
COMPONENT DIAGNOSIS ..........................8
B TERMINAL CIRCUIT .......................................8
Description ................................................................8
Diagnosis Procedure .................................................8
S CONNECTOR CIRCUIT ...................................9
Description ................................................................9
Diagnosis Procedure .................................................9
STARTING SYSTEM ..........................................10
Wiring Diagram .......................................................10
SYMPTOM DIAGNOSIS ..............................11
STARTING SYSTEM ..........................................11
Symptom Table .......................................................11
PRECAUTION ..............................................12
PRECAUTIONS ..................................................12
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .................................................................
12
ON-VEHICLE REPAIR .................................13
STARTER MOTOR .............................................13
Removal and Installation .........................................13
MR18DE
BASIC INSPECTION ...................................
14
DIAGNOSIS AND REPAIR WORKFLOW ........14
Work Flow ................................................................14
FUNCTION DIAGNOSIS ..............................17
STARTING SYSTEM .........................................17
System Diagram ......................................................17
System Description ..................................................17
Component Parts Location ......................................17
Component Description ..........................................18
COMPONENT DIAGNOSIS .........................19
B TERMINAL CIRCUIT .....................................19
Description ...............................................................19
Diagnosis Procedure ...............................................19
S CONNECTOR CIRCUIT .................................20
Description ...............................................................20
Diagnosis Procedure ...............................................20
STARTING SYSTEM .........................................21
Wiring Diagram ........................................................21
SYMPTOM DIAGNOSIS ..............................22
STARTING SYSTEM .........................................22
Symptom Table .......................................................22
PRECAUTION ..............................................23
PRECAUTIONS .................................................23
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .................................................................
23
ON-VEHICLE REPAIR .................................24

STR-2
STARTER MOTOR ............................................24
Removal and Installation ........................................24
K9K
BASIC INSPECTION ...................................
25
DIAGNOSIS AND REPAIR WORKFLOW .........25
Work Flow ...............................................................25
FUNCTION DIAGNOSIS .............................28
STARTING SYSTEM .........................................28
System Diagram .....................................................28
System Description .................................................28
Component Parts Location .....................................28
Component Description .........................................29
COMPONENT DIAGNOSIS ........................30
B TERMINAL CIRCUIT ......................................30
Description ..............................................................30
Diagnosis Procedure ..............................................30
S CONNECTOR CIRCUIT .................................31
Description ..............................................................31
Diagnosis Procedure ...............................................31
STARTING SYSTEM .........................................32
Wiring Diagram .......................................................32
SYMPTOM DIAGNOSIS ............................33
STARTING SYSTEM .........................................33
Symptom Table .......................................................33
PRECAUTION ............................................34
PRECAUTIONS .................................................34
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .................................................................
34
ON-VEHICLE REPAIR ...............................35
STARTER MOTOR ............................................35
Removal and Installation .........................................35