NISSAN LATIO 2007 Service Repair Manual

TROUBLE DIAGNOSIS FOR SYSTEM
STC-25
[EPS]
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STC
Revision: June 20062007 Versa
Component InspectionUGS0008R
EPS MOTOR
1. Turn ignition switch “OFF”.
2. Disconnect EPS control unit harness connector.
3. Check resistance between EPS control unit harness connector
(A) terminals.
4. If NG, replace the steering column assembly. Refer to PS-9,
"Removal and Installation" .
Connector Terminal Resistance
M60 19 – 20 Approx. 0.1 Ω or less
SGIA1630E

STC-26
[EPS]
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: June 20062007 Versa
TROUBLE DIAGNOSIS FOR SYMPTOMSPFP:00007
EPS Warning Lamp Does Not Turn ONUGS0008S
SYMPTOM:
EPS warning lamp does not turn ON when ignition switch to “ON”.
DIAGNOSTIC PROCEDURE
1. CHECK SYSTEM FOR CAN COMMUNICATION LINE
Perform self-diagnosis. Refer to STC-13, "
SELF-DIAG RESULTS MODE" .
Is the
“CAN COMM CIRCUIT [U1000]” displayed?
YES >> Perform trouble diagnosis for CAN communication line. Refer to STC-24, "DTC U1000 CAN
COMM CIRCUIT" .
NO >> GO TO 2.
2. CHECK EPS CONTROL UNIT
Check EPS control unit input/output signal. Refer to STC-11, "
EPS Control Unit Input/Output Signal Reference
Values" .
OK or NG
OK >> GO TO 3.
NG >> Check EPS control unit pin terminals for damage or loose connection with harness connector. If
any items are damaged, repair or replace damaged parts.
3. SYMPTOM CHECK
Check again.
OK or NG
OK >>INSPECTION END
NG >> Replace combination meter. Refer to DI-23, "
Removal and Installation" .

TROUBLE DIAGNOSIS FOR SYMPTOMS
STC-27
[EPS]
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STC
Revision: June 20062007 Versa
EPS Warning Lamp Does Not Turn OFFUGS0008T
SYMPTOM:
EPS warning lamp does not turn OFF for several seconds after starting the engine.
DIAGNOSTIC PROCEDURE
1. CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to STC-13, "
SELF-DIAG RESULTS MODE" .
Is any malfunction detected by self-diagnosis?
YES >> Check the malfunctioning system.
NO >> GO TO 2.
2. CHECK EPS CONTROL UNIT POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect EPS control unit harness connector.
3. Turn ignition switch “ON”. (Do not start engine.)
4. Check voltage between EPS control unit harness connector (A)
terminals and ground.
5. Turn ignition switch “OFF”.
6. Check voltage between EPS control unit harness connector (A)
terminals and ground.
7. Connect EPS control unit harness connector.
OK or NG
OK >> GO TO 3.
NG >> Check the following. If any items are damaged, repair or
replace damaged parts.

60 A fusible link (No. m , located in the fuse and fusible link block). Refer to PG-4, "POWER
SUPPLY ROUTING CIRCUIT" .

10 A fuses (No. 2, located in the fuse block). Refer to PG-4, "POWER SUPPLY ROUTING CIR-
CUIT" .

Harness for short or open between battery and EPS control unit harness connector M54 termi-
nal 17.

Harness for short or open between ignition switch and EPS control unit harness connector M53
terminal 10.
Connector Terminal Voltage
M53 10 – Ground Battery voltage
M54 17 – Ground Battery voltage
SGIA1626E
Connector Terminal Voltage
M53 10 – Ground Approx. 0 V
M54 17 – Ground Battery voltage
SGIA1627E

STC-28
[EPS]
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: June 20062007 Versa
3. CHECK EPS CONTROL UNIT GROUND CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect EPS control unit harness connector.
3. Check continuity between EPS control unit harness connector
(A) terminal and ground.
Also check harness for short to power.
4. Connect EPS control unit harness connector.
OK or NG
OK >> GO TO 4.
NG >> Repair open circuit or short to ground or short to power
in harness or connectors.
4. CHECK EPS CONTROL UNIT
Check EPS control unit input/output signal. Refer to STC-11, "
EPS Control Unit Input/Output Signal Reference
Values" .
OK or NG
OK >> GO TO 5.
NG >> Check EPS control unit pin terminals for damage or loose connection with harness connector. If
any items are damaged, repair or replace damaged parts.
5. SYMPTOM CHECK
Check again.
OK or NG
OK >>INSPECTION END
NG >> Replace combination meter. Refer to DI-23, "
Removal and Installation" .
Connector Terminal Continuity
M54 18 YES
SGIA1628E

TROUBLE DIAGNOSIS FOR SYMPTOMS
STC-29
[EPS]
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STC
Revision: June 20062007 Versa
Steering Wheel Turning Force is Heavy or LightUGS0008U
SYMPTOM:
Steering wheel turning force is heavy or light, while driving.
DIAGNOSTIC PROCEDURE
1. CHECK SYSTEM FOR CAN COMMUNICATION LINE
Perform self-diagnosis. Refer to STC-13, "
SELF-DIAG RESULTS MODE" .
Is the
“CAN COMM CIRCUIT [U1000]” displayed?
YES >> Perform trouble diagnosis for CAN communication line. Refer to STC-24, "DTC U1000 CAN
COMM CIRCUIT" .
NO-1 >> With ABS: GO TO 2.
NO-2 >> Without ABS: GO TO 3.
2. CHECK VEHICLE SPEED SIGNAL FROM ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
Perform self-diagnosis with ABS actuator and electric unit (control unit). Refer to BRC-20, "
SELF-DIAGNO-
SIS" .
Is any malfunction detected by self-diagnosis?
YES >> Check the malfunctioning system.
NO >> GO TO 4.
3. CHECK VEHICLE SPEED SIGNAL FROM TRANSMISSON CONTROL MODULE (TCM)
Perform self-diagnosis with TCM. Refer to AT-82, "
SELF-DIAGNOSTIC RESULT MODE" .
Is any malfunction detected by self-diagnosis?
YES >> Check the malfunctioning system.
NO >> GO TO 4.
4. CHECK COMBINATION METER SIGNAL
Perform self-diagnosis with combination meter. Refer to DI-14, "
SELF-DIAGNOSTIC RESULTS" .
Is any malfunction detected by self-diagnosis?
YES >> Check the malfunctioning system.
NO >> GO TO 5.
5. CHECK ENGINE STATUS SIGNAL
Perform self-diagnosis for ECM. Refer to EC-116, "
SELF-DIAG RESULTS MODE" .
Is any malfunction detected by self-diagnosis?
YES >> Check the malfunctioning system.
NO >> GO TO 6.
6. CHECK EPS MOTOR SYSTEM
Perform trouble diagnosis for EPS motor. Refer to STC-21, "
DTC C1606 EPS MOTOR" .
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.
7. CHECK EPS CONTROL UNIT
Check EPS control unit input/output signal. Refer to STC-11, "
EPS Control Unit Input/Output Signal Reference
Va lu e s" .
OK or NG
OK >> GO TO 8.
NG >> Check EPS control unit pin terminals for damage or loose connection with harness connector. If
any items are damaged, repair or replace damaged parts.

STC-30
[EPS]
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: June 20062007 Versa
8. SYMPTOM CHECK
Check again.
OK or NG
OK >>INSPECTION END
NG >> Check the steering wheel turning force because there may be mechanical malfunction. Refer to
PS-6, "
CHECKING STEERING WHEEL TURNING FORCE" .

TROUBLE DIAGNOSIS FOR SYMPTOMS
STC-31
[EPS]
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Revision: June 20062007 Versa
Unbalance Steering Wheel Turning Force and Return Between Right and LeftUGS0008V
SYMPTOM:
Unbalance steering wheel turning force and return between right and left, while driving.
DIAGNOSTIC PROCEDURE
1. CHECK EPS WARNING LAMP
Confirm EPS warning lamp during engine running.
Does EPS warning lamp turn OFF?
YES >> GO TO 2.
NO >> Go to STC-27, "
EPS Warning Lamp Does Not Turn OFF" .
2. CHECK WHEEL ALIGNMENT
Check wheel alignment. Refer to FSU-6, "
Wheel Alignment Inspection" .
OK or NG
OK >> GO TO 3.
NG >> Adjust wheel alignment. Refer to FSU-6, "
Wheel Alignment Inspection" .
3. CHECK EPS CONTROL UNIT
Check EPS control unit input/output signal. Refer to STC-11, "
EPS Control Unit Input/Output Signal Reference
Va lu e s" .
OK or NG
OK >> GO TO 4.
NG >> Check EPS control unit pin terminals for damage or loose connection with harness connector. If
any items are damaged, repair or replace damaged parts.
4. SYMPTOM CHECK
Check again.
OK or NG
OK >>INSPECTION END
NG >> Check the steering wheel turning force because there may be mechanical malfunction. Refer to
PS-6, "
CHECKING STEERING WHEEL TURNING FORCE" .

STC-32
[EPS]
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: June 20062007 Versa
Unbalance Steering Wheel Turning Force (Torque Variation)UGS0008W
SYMPTOM:
Unbalance steering wheel turning force, while driving (Torque variation).
DIAGNOSTIC PROCEDURE
1. CHECK EPS WARNING LAMP
Confirm EPS warning lamp during engine running.
Does EPS warning lamp turn OFF?
YES >> GO TO 2.
NO >> Go to STC-27, "
EPS Warning Lamp Does Not Turn OFF" .
2. CHECK STEERING COLUMN INTERMEDIATE SHAFT
Check the connection between intermediate shaft and the mounting part of steering column assembly and
steering gear assembly. Refer to PS-9, "
COMPONENT" .
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.
3. CHECK EPS CONTROL UNIT
Check EPS control unit input/output signal. Refer to STC-11, "
EPS Control Unit Input/Output Signal Reference
Values" .
OK or NG
OK >> GO TO 4.
NG >> Check EPS control unit pin terminals for damage or loose connection with harness connector. If
any items are damaged, repair or replace damaged parts.
4. SYMPTOM CHECK
Check again.
OK or NG
OK >>INSPECTION END
NG >> Check the steering wheel turning force because there may be mechanical malfunction. Refer to
PS-6, "
CHECKING STEERING WHEEL TURNING FORCE" .

WT-1
ROAD WHEELS & TIRES
E SUSPENSION
CONTENTS
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SECTION WT
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WT
Revision: June 20062007 Versa PRECAUTIONS .......................................................... 2
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 2
PREPARATION ........................................................... 3
Special Service Tool ................................................. 3
Commercial Service Tools ........................................ 3
NOISE, VIBRATION AND HARSHNESS (NVH)
TROUBLESHOOTING ................................................ 4
NVH Troubleshooting Chart ..................................... 4
ROAD WHEEL ............................................................ 5
Inspection ................................................................. 5
ALUMINUM WHEEL ............................................. 5
STEEL WHEEL ..................................................... 5
ROAD WHEEL TIRE ASSEMBLY .............................. 6
Balancing Wheels .................................................... 6
Rotation .................................................................... 6
LOW TIRE PRESSURE WARNING SYSTEM ............ 7
System Components ................................................ 7
System Description .................................................. 7
BODY CONTROL MODULE (BCM) ...................... 7
TRANSMITTER ..................................................... 8
REMOTE KEYLESS ENTRY RECEIVER ............. 8
COMBINATION METER ....................................... 8
CAN COMMUNICATION ............................................ 9
System Description .................................................. 9
TROUBLE DIAGNOSES .......................................... 10
Wiring Diagram — T/WARN — .............................. 10
Terminals and Reference Values for BCM ..............11
ID Registration Procedure .......................................11
ID REGISTRATION WITH TRANSMITTER
ACTIVATION TOOL .............................................11
ID REGISTRATION WITHOUT TRANSMITTER
ACTIVATION TOOL ............................................ 12
Transmitter Wake Up Operation ............................. 13
CONSULT-II Function (BCM) ................................. 14
How to Perform Trouble Diagnosis for Quick and Accurate Repair ...................................................... 15
INTRODUCTION ................................................. 15
WORK FLOW ...................................................... 15
Preliminary Check .................................................. 16
Self-Diagnosis ........................................................ 16
DESCRIPTION .................................................... 16
FUNCTION .......................................................... 16
Flash Code/Symptom Chart ................................... 19
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC
ITEMS ........................................................................ 20
Data From Transmitter Not Being Received ........... 20
MALFUNCTION CODE NO. 21, 22, 23 OR 24
(DTC C1708, C1709, C1710 OR C1711) ............ 20
Transmitter Malfunction .......................................... 20
MALFUNCTION CODE NO. 31, 32, 33, 34, 41,
42, 43, 44, 45, 46, 47 OR 48 ............................... 20
Transmitter Pressure Malfunction ........................... 21
MALFUNCTION CODE NO. 35, 36, 37 OR 38 ... 21
Vehicle Speed Signal .............................................. 22
MALFUNCTION CODE NO. 52 (DTC C1729) .... 22
TROUBLE DIAGNOSIS FOR SYMPTOMS .............. 23
Low Tire Pressure Warning Lamp Does Not Come
On When Ignition Switch Is Turned On. ................. 23
Low Tire Pressure Warning Lamp Stays On When
Ignition Switch Is Turned On .................................. 23
Low Tire Pressure Warning Lamp Flashes When
Ignition Switch Is Turned On. ................................. 25
Hazard Warning Lamps Flash When Ignition Switch
Is Turned On ........................................................... 26
ID Registration Cannot Be Completed ................... 26
REMOVAL AND INSTALLATION ............................. 27
Transmitter (Pressure Sensor) ............................... 27
REMOVAL ........................................................... 27
INSTALLATION ................................................... 27
SERVICE DATA AND SPECIFICATIONS (SDS) ...... 29
Road Wheel ............................................................ 29
Tire ......................................................................... 29

WT-2
PRECAUTIONS
Revision: June 20062007 Versa
PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EES002ES
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 and SB section of this Service Man-
ual.
WAR NIN G:

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 per-
formed by an authorized NISSAN/INFINITI dealer.

Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS 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
harness connectors.