belt NISSAN LATIO 2007 Service Owner's Guide

CVT-8
PRECAUTIONS
Revision: June 20062007 Versa
PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
UCS005XD
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.
Precautions Necessary for Steering Wheel Rotation After Battery DisconnectUCS006Y0
NOTE:

This Procedure is applied only to models with Intelligent Key system and NVIS/IVIS (NISSAN/INFINITI
VEHICLE IMMOBILIZER SYSTEM - NATS).

Remove and install all control units after disconnecting both battery cables with the ignition knob in the
″LOCK″ position.

Always use CONSULT-II 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 NVIS/IVIS, an electrically controlled steering lock
mechanism 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-II.

CVT SYSTEM
CVT-21
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CVT
Revision: June 20062007 Versa
CVT SYSTEMPFP:31036
Cross-sectional View - RE0F08AUCS005XQ
1. Converter housing 2. Oil pump 3. Forward clutch
4. Reverse brake 5. Planetary carrier 6. Primary pulley
7. Steel belt 8. Sun gear 9. Side cover
10. Internal gear 11. Secondary pulley 12. Differential case
13. Final gear 14. Idler gear 15. Reduction gear
16. Output gear 17. Parking gear 18. Input shaft
19. Torque converter
SCIA8015E

TROUBLE DIAGNOSIS
CVT-37
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CVT
Revision: June 20062007 Versa
DIAGNOSTIC WORKSHEET
Information From Customer
KEY POINTS

WHAT..... Vehicle & CVT model

WHEN..... Date, Frequencies

WHERE..... Road conditions

HOW..... Operating conditions, Symptoms
Diagnostic Worksheet Chart
Customer name MR/MS Model & Year VIN
Trans. Model Engine Mileage
malfunction Date Manuf. Date In Service Date
Frequency❏ Continuous❏ Intermittent ( times a day)
Symptoms❏ Vehicle does not move. (❏ Any position❏ Particular position)
❏ No shift
❏ Lock-up malfunction
❏ Shift shock or slip (❏ N → D❏ N → R❏ Lock-up❏ Any drive position)
❏ Noise or vibration
❏ No pattern select
❏ Others
()
Malfunction indicator lamp (MIL)❏ Continuously lit❏ Not lit
1❏ Read the item on cautions concerning fail-safe and understand the customer's complaint.CVT-34
2❏ CVT fluid inspection
CVT-43❏ Leak (Repair leak location.)
❏ Sta te
❏ Amount
3❏ Stall test and line pressure test
CVT-43
,
CVT-45
❏ Stall test
❏ Torque converter one-way clutch
❏ Reverse brake
❏ Forward clutch
❏ Steel belt❏ Engine
❏ Line pressure low
❏ Primary pulley
❏ Secondary pulley
❏ Line pressure inspection - Suspected part:

CVT-38
TROUBLE DIAGNOSIS
Revision: June 20062007 Versa
4❏ Perform road test.CVT-46
4-1.Check before engine is started CVT-49
❏ CVT-180, "O/D OFF Indicator Lamp Does Not Come On"
❏ Perform self-diagnosis. Enter checks for detected items. CVT-60
❏ CVT-68, "DTC U1000 CAN COMMUNICATION LINE"
❏ CVT-72, "DTC P0615 START SIGNAL CIRCUIT"
❏ CVT-76, "DTC P0703 STOP LAMP SWITCH CIRCUIT"
❏ CVT-78, "DTC P0705 PARK/NEUTRAL POSITION SWITCH"
❏ CVT-85, "DTC P0710 CVT FLUID TEMPERATURE SENSOR CIRCUIT"
❏ CVT-90, "DTC P0715 INPUT SPEED SENSOR CIRCUIT (PRI SPEED SENSOR)"
❏ CVT-95, "DTC P0720 VEHICLE SPEED SENSOR CVT (SECONDARY SPEED
SENSOR)"
❏ CVT-101, "DTC P0725 ENGINE SPEED SIGNAL"
❏ CVT-103, "DTC P0730 BELT DAMAGE"
❏ CVT-105, "DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVE"
❏ CVT-110, "DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP)"
❏ CVT-113, "DTC P0745 LINE PRESSURE SOLENOID VALVE"
❏ CVT-118, "DTC P0746 PRESSURE CONTROL SOLENOID A PERFORMANCE
(LINE PRESSURE SOLENOID VALVE)"
❏ CVT-121, "DTC P0776 PRESSURE CONTROL SOLENOID B PERFORMANCE
(SEC PRESSURE SOLENOID VALVE)"
❏ CVT-124, "DTC P0778 PRESSURE CONTROL SOLENOID B ELECTRICAL (SEC
PRESSURE SOLENOID VALVE)"
❏ CVT-129, "DTC P0840 TRANSMISSION FLUID PRESSURE SENSOR A CIRCUIT
(SEC PRESSURE SENSOR)"
❏ CVT-134, "DTC P0841 PRESSURE SENSOR FUNCTION"
❏ CVT-137, "DTC P0845 TRANSMISSION FLUID PRESSURE SENSOR B CIRCUIT
(PRI PRESSURE SENSOR)"
❏ CVT-142, "DTC P0868 SECONDARY PRESSURE DOWN"
❏ CVT-145, "DTC P1701 TRANSMISSION CONTROL MODULE (POWER SUPPLY)"
❏ CVT-150, "DTC P1705 THROTTLE POSITION SENSOR"
❏ CVT-152, "DTC P1722 ESTM VEHICLE SPEED SIGNAL"
❏ CVT-154, "DTC P1723 CVT SPEED SENSOR FUNCTION"
❏ CVT-156, "DTC P1726 ELECTRIC THROTTLE CONTROL SYSTEM"
❏ CVT-158, "DTC P1740 LOCK-UP SELECT SOLENOID VALVE CIRCUIT"
❏ CVT-164, "DTC P1777 STEP MOTOR - CIRCUIT"
❏ CVT-168, "DTC P1778 STEP MOTOR - FUNCTION"
4-2.Check at idleCVT-49
❏ CVT-181, "Engine Cannot Be Started in “P” and “N” Position"
❏ CVT-182, "In “P” Position, Vehicle Moves Forward or Backward When Pushed"
❏ CVT-182, "In “N” Position, Vehicle Moves"
❏ CVT-183, "Large Shock “N” → “R” Position"
❏ CVT-184, "Vehicle Does Not Creep Backward in “R” Position"
❏ CVT-185, "Vehicle Does Not Creep Forward in “D” or “L” Position"

TROUBLE DIAGNOSIS
CVT-39
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44-3.Cruise testCVT-50
❏ CVT-186, "Vehicle Speed Does Not Change in “L” Position"
❏ CVT-187, "Vehicle Speed Does Not Change in overdrive-off mode"
❏ CVT-188, "Vehicle Speed Does Not Change in “D” Position"
❏ CVT-189, "Vehicle Does Not Decelerate by Engine Brake"
❏ perform self-diagnosis. Enter checks for detected items. CVT-60
❏ CVT-68, "DTC U1000 CAN COMMUNICATION LINE"
❏ CVT-72, "DTC P0615 START SIGNAL CIRCUIT"
❏ CVT-76, "DTC P0703 STOP LAMP SWITCH CIRCUIT"
❏ CVT-78, "DTC P0705 PARK/NEUTRAL POSITION SWITCH"
❏ CVT-85, "DTC P0710 CVT FLUID TEMPERATURE SENSOR CIRCUIT"
❏ CVT-90, "DTC P0715 INPUT SPEED SENSOR CIRCUIT (PRI SPEED SENSOR)"
❏ CVT-95, "DTC P0720 VEHICLE SPEED SENSOR CVT (SECONDARY SPEED
SENSOR)"
❏ CVT-101, "DTC P0725 ENGINE SPEED SIGNAL"
❏ CVT-103, "DTC P0730 BELT DAMAGE"
❏ CVT-105, "DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVE"
❏ CVT-110, "DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP)"
❏ CVT-113, "DTC P0745 LINE PRESSURE SOLENOID VALVE"
❏ CVT-118, "DTC P0746 PRESSURE CONTROL SOLENOID A PERFORMANCE
(LINE PRESSURE SOLENOID VALVE)"
❏ CVT-121, "DTC P0776 PRESSURE CONTROL SOLENOID B PERFORMANCE
(SEC PRESSURE SOLENOID VALVE)"
❏ CVT-124, "DTC P0778 PRESSURE CONTROL SOLENOID B ELECTRICAL (SEC
PRESSURE SOLENOID VALVE)"
❏ CVT-129, "DTC P0840 TRANSMISSION FLUID PRESSURE SENSOR A CIRCUIT
(SEC PRESSURE SENSOR)"
❏ CVT-134, "DTC P0841 PRESSURE SENSOR FUNCTION"
❏ CVT-137, "DTC P0845 TRANSMISSION FLUID PRESSURE SENSOR B CIRCUIT
(PRI PRESSURE SENSOR)"
❏ CVT-142, "DTC P0868 SECONDARY PRESSURE DOWN"
❏ CVT-145, "DTC P1701 TRANSMISSION CONTROL MODULE (POWER SUPPLY)"
❏ CVT-150, "DTC P1705 THROTTLE POSITION SENSOR"
❏ CVT-152, "DTC P1722 ESTM VEHICLE SPEED SIGNAL"
❏ CVT-154, "DTC P1723 CVT SPEED SENSOR FUNCTION"
❏ CVT-156, "DTC P1726 ELECTRIC THROTTLE CONTROL SYSTEM"
❏ CVT-158, "DTC P1740 LOCK-UP SELECT SOLENOID VALVE CIRCUIT"
❏ CVT-164, "DTC P1777 STEP MOTOR - CIRCUIT"
❏ CVT-168, "DTC P1778 STEP MOTOR - FUNCTION"
5❏ Inspect each system for items found to be NG in the self-diagnosis and repair or replace the malfunctioning parts.
6❏ Perform all road tests and enter the checks again for the required items.CVT-46
7❏ For any remaining NG items, perform the “diagnosis procedure” and repair or replace the malfunctioning parts.
8❏ Erase the results of the self-diagnosis from the TCM.CVT-32
,
CVT-32

CVT-44
TROUBLE DIAGNOSIS
Revision: June 20062007 Versa
6. While holding down the foot brake, gradually press down the
accelerator pedal.
7. Quickly read off the stall speed, and then quickly remove your
foot from the accelerator pedal.
CAUTION:
Do not hold down the accelerator pedal for more than 5 sec-
onds during this test.
8. Move the selector lever to the “N” position.
9. Cool down the CVT fluid.
CAUTION:
Run the engine at idle for at least 1 minute.
10. Repeat steps 6 through 9 with selector lever in “R” position.
Judgement Stall Test
O: Stall speed within standard value position.
H: Stall speed is higher than standard value.
L: Stall speed is lower than standard value.
Stall speed: 2,600 - 3,150 rpm
SAT5 1 4G
SAT7 7 1B
Selector lever position
Expected problem location
“D” “R”
Stall rotation HO

Forward clutch
OH

Reverse brake
LL

Engine and torque converter one-way clutch
HH

Line pressure low

Primary pulley

Secondary pulley

Steel belt

TROUBLE DIAGNOSIS
CVT-61
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Operation Procedure
1. Touch “SELF-DIAG RESULTS” on “SELECT DIAG MODE”.
Display shows malfunction experienced since the last erasing
operation.
Display Items List
X: Applicable —: Not applicable
BCIA0031E
Items (CONSULT-
II screen terms)Malfunction is detected when...TCM self-
diagnosisOBD-II (DTC)
Reference
page “TRANS-
MISSION”
with CON-
SULT-IIMIL indicator
lamp*1,
“ENGINE” with
CONSULT-II or
GST
CAN COMM CIR-
CUITWhen TCM is not transmitting or receiving CAN communica-
tion signal for 2 seconds or moreU1000 U1000CVT-68
CONTROL
UNIT(CAN)When detecting error during the initial diagnosis of CAN con-
troller of TCMU1010 U1010CVT-71
STARTER RELAY/
CIRCIf this signal is ON other than in “P” or “N” position, this is
judged to be a malfunction
(And if it is OFF in “P” or “N” position, this is judged to be a
malfunction too)P0615 —CVT-72
BRAKE SW/CIRC When the brake switch does not switch to ON or OFF P0703 —CVT-76
PNP SW/CIRC
PNP switch 1-4 signals input with impossible pattern

PNP switch 3 monitor terminal open or short circuitP0705 P0705CVT-78
AT F T E M P S E N /
CIRCDuring running, the CVT fluid temperature sensor signal volt-
age is excessively high or lowP0710 P0710CVT-85
INPUT SPD SEN/
CIRC
Input speed sensor (primary speed sensor) signal is not
input due to an open circuit

An unexpected signal is input when vehicle is being drivenP0715 P0715CVT-90
VEH SPD SEN/
CIR AT

Signal from vehicle speed sensor CVT [Output speed sen-
sor (Secondary speed sensor)] not input due to open or
short circuit

Unexpected signal input during runningP0720 P0720CVT-95
ENGINE SPEED
SIG
TCM does not receive the CAN communication signal
from the ECM

Engine speed is too low while drivingP0725 —CVT-101
BELT DAMG Unexpected gear ratio detected P0730 —CVT-103
TCC SOLENOID/
CIRCNormal voltage not applied to solenoid due to open or short
circuitP0740 P0740CVT-105
A/T TCC S/V
FNCTN

CVT cannot perform lock-up even if electrical circuit is
good

TCM detects as irregular by comparing difference value
with slip rotation

There is big difference engine speed and primary speed
when TCM lock-up signal is onP0744 P0744CVT-110

DTC P0730 BELT DAMAGE
CVT-103
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DTC P0730 BELT DAMAGEPFP:31935
DescriptionUCS00603
TCM selects the gear ratio using the engine load (throttle position), the primary pulley revolution speed, and
the secondary pulley revolution speed as input signal. Then it changes the operating pressure of the primary
pulley and the secondary pulley and changes the groove width of the pulley.
CONSULT-II Reference ValueUCS00604
Remarks: Specification data are reference values.
On Board Diagnosis LogicUCS00605

This is not an OBD-II self-diagnostic item.

TCM calculates the actual gear ratio with input speed sensor (primary speed sensor) and output speed
sensor (secondary speed sensor).

Diagnostic trouble code “P0730 BELT DAMG” with CONSULT-II is detected, when TCM receives an unex-
pected gear ratio signal.
Possible CauseUCS00606
Transaxle assembly
DTC Confirmation ProcedureUCS00607
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch OFF and
wait at least 10 seconds before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-II
1. Turn ignition switch ON and select “DATA MONITOR” mode for
“TRANSMISSION” with CONSULT-II.
2. Make sure that output voltage of CVT fluid temperature sensor
is within the range below.
ATF TEMP SEN: 1.0 - 2.0 V
If out of range, drive the vehicle to decrease the voltage
(warm up the fluid) or stop engine to increase the voltage
(cool down the fluid)
3. Select “DATA MONITOR” mode for “TRANSMISSION” with
CONSULT-II.
4. Start engine and maintain the following conditions for at least 30
consecutive seconds.
TEST START FROM 0 km/h (0 MPH)
CONSTANT ACCELERATION: Keep 30 sec or more
VEHICLE SPEED: 10 km/h (6 MPH) or more
ACC PEDAL OPEN: More than 1.0/8
RANGE: “D” position
ENG SPEED: 450 rpm or more
5. If DTC is detected, go to CVT-104, "
Diagnostic Procedure" .
Item name Condition Display value (Approx.)
GEAR RATIO During driving 2.56 - 0.43
BCIA0031E

CVT-104
DTC P0730 BELT DAMAGE
Revision: June 20062007 Versa
Diagnostic ProcedureUCS00608
1. CHECK DTC
Perform CVT-103, "
DTC Confirmation Procedure" .
Are any DTC displayed?
YES - 1>> DTC except for “P0730 BELT DAMG” is displayed: Go to Check the DTC detected item. Refer to
CVT-60, "
SELF-DIAGNOSTIC RESULT MODE" .
YES - 2>> DTC for “P0730 BELT DAMG” is displayed: Replace the transaxle assembly. Refer to CVT-207,
"Removal and Installation" .
NO >>INSPECTION END

DI-1
DRIVER INFORMATION SYSTEM
K ELECTRICAL
CONTENTS
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SECTION DI
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DI
Revision: June 20062007 Versa PRECAUTION ............................................................ 3
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 3
PREPARATION ........................................................... 4
Commercial Service Tool ......................................... 4
COMBINATION METERS ........................................... 5
Component Parts and Harness Connector Location ..... 5
System Description .................................................. 5
UNIFIED METER CONTROL UNIT ...................... 5
POWER SUPPLY AND GROUND CIRCUIT ........ 5
SPEEDOMETER ................................................... 6
TACHOMETER ..................................................... 6
FUEL GAUGE ....................................................... 6
ODO/TRIP METER ............................................... 6
CAN COMMUNICATION SYSTEM DESCRIP-
TION ...................................................................... 6
Arrangement of Combination Meter ......................... 7
Internal Circuit .......................................................... 8
Wiring Diagram — METER — .................................. 9
Combination Meter Harness Connector Terminal
Layout .....................................................................11
Terminals and Reference Value for Combination
Meter .......................................................................11
Self-Diagnosis Mode of Combination Meter ........... 13
SELF-DIAGNOSIS MODE FUNCTION ............... 13
OPERATION PROCEDURE ............................... 13
CONSULT-II Function (METER) ............................. 14
CONSULT-II START PROCEDURE .................... 14
SELF-DIAGNOSTIC RESULTS .......................... 14
DATA MONITOR ................................................. 15
Trouble Diagnosis .................................................. 17
HOW TO PERFORM TROUBLE DIAGNOSIS ... 17
PRELIMINARY CHECK ...................................... 17
Symptom Chart ...................................................... 17
Power Supply and Ground Circuit Inspection ........ 17
Vehicle Speed Signal Inspection ............................ 18
WITH ABS ........................................................... 18
WITHOUT ABS OR CVT ..................................... 19
WITH CVT, WITHOUT ABS ................................ 19Engine Speed Signal Inspection ............................. 20
Fuel Level Sensor Signal Inspection ...................... 20
Fuel Gauge Fluctuates, Indicates Wrong Value, or
Varies ...................................................................... 22
Fuel Gauge Does Not Move to Full position ........... 22
DTC [U1000] CAN Communication Circuit ............. 22
Electrical Components Inspection .......................... 23
FUEL LEVEL SENSOR UNIT CHECK ................ 23
Removal and Installation ........................................ 23
COMBINATION METER ...................................... 23
WARNING LAMPS .................................................... 24
Schematic ............................................................... 24
Wiring Diagram — WARN — .................................. 25
Oil Pressure Warning Lamp Stays Off (Ignition
Switch ON) ............................................................. 34
Oil Pressure Warning Lamp Does Not Turn Off (Oil
Pressure Is Normal) ................................................ 35
Component Inspection ............................................ 36
OIL PRESSURE SWITCH ................................... 36
A/T INDICATOR ........................................................ 37
System Description ................................................. 37
Wiring Diagram — AT/IND — ................................. 38
A/T Indicator Does Not Illuminate ........................... 40
CVT INDICATOR ....................................................... 42
System Description ................................................. 42
Wiring Diagram — CVTIND — ............................... 43
CVT Indicator Does Not Illuminate ......................... 45
WARNING CHIME ..................................................... 47
Component Parts and Harness Connector Location ... 47
System Description ................................................. 47
POWER SUPPLY AND GROUND CIRCUIT ....... 47
IGNITION KEY WARNING CHIME (WITHOUT
INTELLIGENT KEY) ............................................ 48
IGNITION KEY WARNING CHIME (WITH INTEL-
LIGENT KEY) ...................................................... 48
LIGHT WARNING CHIME ................................... 48
Wiring Diagram — CHIME — ................................. 50
Terminals and Reference Values for BCM .............. 52
CONSULT-II Function (BCM) ................................. 52
CONSULT-II START PROCEDURE .................... 52