2009 NISSAN LATIO wiring

IGNITION SIGNAL
EC-1525
< SERVICE INFOMATION >
[MR TYPE 2] C
D E
F
G H
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J
K L
M A EC
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2. Check harness continuity between ignition coil terminal 2 and ground.
Refer to Wiring Diagram.
3. Also check harness for short to power.
OK or NG OK >> GO TO 13.
NG >> Repair open circuit or short to power in harness or connectors. 13.
CHECK IGNITION COIL OUTPUT SI GNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM termi nals 17, 18, 21, 22 and ignition coil terminal 1.
Refer to Wiring Diagram.
3. Also check harness for short to ground and short to power.
OK or NG OK >> GO TO 14.
NG >> Repair open circuit or short to ground or short to power in harness or connectors. 14.
CHECK IGNITION COIL WITH POWER TRANSISTOR
Refer to EC-1525, " Component Inspection " .
OK or NG OK >> GO TO 15.
NG >> Replace ignition coil with power transistor. 15.
CHECK INTERMITTENT INCIDENT
Refer to EC-1138 .
>> INSPECTION END
Component Inspection INFOID:0000000004500424
IGNITION COIL WITH POWER TRANSISTOR CAUTION:
Do the following procedure in the place where ventilation is good without the combustible.
1. Turn ignition switch OFF.
2. Disconnect ignition coil harness connector.
3. Check resistance between ignition coil terminals as follows.
4. If NG, replace ignition coil with power transistor. If OK, go to next step.
5. Turn ignition switch OFF.
6. Reconnect all harness connectors disconnected. Continuity should exist.
Continuity should exist.
Terminal No. (Polarity) Resistance Ω [at 25 °C (77 °F)]
1 and 2 Except 0 or ∞
1 and 3 Except 0
2 and 3 PBIB0847E

EC-1528< SERVICE INFOMATION >
[MR TYPE 2]
REFRIGERANT PRESSURE SENSOR
Wiring Diagram INFOID:0000000004500427
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring in put/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground ot her than ECM terminals, such as the ground. BBWA2662E

EC-1530< SERVICE INFOMATION >
[MR TYPE 2]
REFRIGERANT PRESSURE SENSOR
1. Disconnect refrigerant pressure sensor (1) harness connector.
- : Vehicle front
2. Turn ignition switch ON.
3. Check voltage between refrigerant pressure sensor terminal 3 and ground with CONSULT-III or tester.
OK or NG OK >> GO TO 5.
NG >> GO TO 4. 4.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors E8, F8
• Harness for open or short between refrigerant pressure sensor and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors. 5.
CHECK REFRIGERANT PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between refrigerant pressure sensor terminal 1 and ECM terminal 48.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG OK >> GO TO 7.
NG >> GO TO 6. 6.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors E8, F8
• Harness for open or short between refrigerant pressure sensor and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors. 7.
CHECK REFRIGERANT PRESSURE SENSOR INPU T SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between refrigerant pressure sensor terminal 2 and ECM terminal 41. Refer to Wiring Diagram.
2. Also check harness for short to ground and short to power.
OK or NG BBIA0713E
Voltage: Approximately 5V
SEF479Y
Continuity should exist.
Continuity should exist.

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PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER" INFOID:0000000004783758
The Supplemental Restraint System such as “A IR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severi ty 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 w hether 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.
WARNING:
• To avoid rendering the SRS inoper ative, 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 in correct removal and installation of the SRS can lead to personal
injury caused by unintentional act ivation of the system. For removal of Spiral Cable and Air Bag
Module, see the SRS section.
• Do not use electrical test equipm ent on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identi fied by yellow and/or orange harnesses or har-
ness connectors.
• When working near the Airbag Diagnosis Sensor Un it or other Airbag System sensors with the Igni-
tion ON or engine running, DO NOT use air or el ectric power tools or strike near the sensor(s) with a
hammer. Heavy vibration could activate the sensor( s) and deploy the air bag(s), possibly causing
serious injury.
• When using air or electric power tools or hammers , always switch the Ignition OFF, disconnect the
battery, and wait at least 3 minutes before performing any service.
Precaution Necessary for Steering Wh eel Rotation After Battery Disconnect
INFOID:0000000004685432
NOTE:
• This Procedure is applied only to models with Inte lligent Key system and NATS (NISSAN ANTI-THEFT SYS-
TEM).
• Remove and install all control units after disconnecti ng 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 pow er 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 al l control units using CONSULT-III.

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• If items or work required are not covered by the
engine section, follow the procedures in the applica-
ble sections.
• Always use the support poin t specified for lifting.
• Use either 2-pole lift type or separate type lift as best you can. If board-on type is used for unavoid-
able reasons, support at the rear axle jacking point with a transmission jack or similar tool before
starting work, in prepar ation for the backward shif t of center of gravity.
• For supporting points fo r lifting and jacking point at rear axle, refer to GI-38, " Garage Jack and
Safety Stand and 2-Pole Lift " .
REMOVAL
Outline Remove the engine and the transaxle assembly from t he vehicle downward. Separate the engine and the tran-
saxle.
Preparation 1. Remove the hood assembly. Refer to BL-14, " Removal and Installation " .
2. Remove the cowl top cover and cowl top extension assembly. Refer to EI-22, " Removal and Installation " .
3. Release fuel pressure. Refer to EC-498, " Inspection " .
4. Drain engine coolant from radiator. Refer to CO-11, " Changing Engine Coolant " .
CAUTION:
• Perform this step when the engine is cold.
• Never spill engine coolant on drive belt.
5. Drain the transmission fluid. Refer to MT-10, " Draining " (M/T),
AT-17, " Changing A/T Fluid " (A/T).
6. Remove the following parts. • Engine undercover
• Front road wheels and tires: Refer to WT-7, " Rotation " .
• Front fender protector (RH and LH): Refer to EI-24, " Removal and Installation " .
• Battery and battery tray: Refer to SC-7, " Removal and Installation " .
• Drive belt: Refer to EM-15, " Removal and Installation " .
• Air duct and air cleaner case assembly: Refer to EM-26, " Exploded View " .
• Radiator hose (upper and lower): Refer to CO-16, " Component " .
• Disconnect cooling fan controller wiring harness.
• Remove coolant reservoir tank.
• Remove fan shroud and cooling fan assembly. Refer to CO-18, " Component (Models with A/C) " or
CO- 18, " Component (Models without A/C) " .
Engine Room LH 1. Disconnect all connections of engine harness around the engine mounting insulator (LH), and then tem- porarily secure the engine harness into the engine side.
CAUTION:
Protect connectors using a resin bag against foreign materials.
2. Remove ground cable at transaxle side.
3. Disconnect fuel feed hose at engine side. Refer to EM-34, " Exploded View " .
4. Disconnect EVAP purge hose and brake booster vacuum hose.
5. Disconnect heater hoses, and install plugs them to prevent engine coolant from draining. Refer to CO-16," Component " .
6. Disconnect control linkage from transaxle. Refer to AT-212, " Control Device Removal and Installation " (A/
T), MT-13, " Exploded View " (M/T).
7. Disconnect the clutch tube at tr ansmission side (if equipped). Refer to CL-14, " Removal and Installation " .
Engine Room RH 1. Remove ground cable between front cover and vehicle.
2. Remove generator and generator bracket; Refer to SC-25, " Removal and Installation " .
3. Remove A/C compressor with piping connected from t he engine. Temporarily secure it on the vehicle side
with a rope to avoid putting load on it. (if equipped) Refer to MTC-78, " Removal and Installation of Com-
pressor - HR16DE " .
Vehicle Underbody

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SERVICE INFORMATION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER" INFOID:0000000004784390
The Supplemental Restraint System such as “A IR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severi ty 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 w hether 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.
WARNING:
• To avoid rendering the SRS inoper ative, 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 in correct removal and installation of the SRS can lead to personal
injury caused by unintentional act ivation of the system. For removal of Spiral Cable and Air Bag
Module, see the SRS section.
• Do not use electrical test equipm ent on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identi fied by yellow and/or orange harnesses or har-
ness connectors.
• When working near the Airbag Diagnosis Sensor Un it or other Airbag System sensors with the Igni-
tion ON or engine running, DO NOT use air or el ectric power tools or strike near the sensor(s) with a
hammer. Heavy vibration could activate the sensor( s) and deploy the air bag(s), possibly causing
serious injury.
• When using air or electric power tools or hammers , always switch the Ignition OFF, disconnect the
battery, and wait at least 3 minutes before performing any service.
Precaution Necessary for Steering Wh eel Rotation After Battery Disconnect
INFOID:0000000004675325
NOTE:
• This Procedure is applied only to models with Inte lligent Key system and NATS (NISSAN ANTI-THEFT SYS-
TEM).
• Remove and install all control units after disconnecti ng 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 pow er 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 al l control units using CONSULT-III.

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CONTENTS
GENERAL INFORMATION
SERVICE INFORMATION .. ..........................2
PRECAUTIONS .............................................. .....2
Description .......................................................... ......2
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
2
Precaution Necessary fo r Steering Wheel Rota-
tion After Battery Disconnect ............................... ......
2
General Precaution ............................................. ......3
Precaution for Three Way Catalyst ..................... ......4
Precaution for Fuel (Unleaded Regular Gasoline
Recommended) ................................................... ......
4
Precaution for Multiport Fuel Injection System or
Engine Control System ....................................... ......
5
Precaution for Hoses ........................................... ......5
Precaution for Engine Oils .................................. ......6
Precaution for Air Conditioning ........................... ......6
HOW TO USE THIS MANUAL ....................... .....7
Description .......................................................... ......7
Terms .................................................................. ......7
Units .................................................................... ......7
Contents .............................................................. ......7
Relation between Illustrations and Descriptions . ......8
Component .......................................................... ......8
How to Follow Trouble Diagnosis ........................ ......9
How to Read Wiring Diagr am ..................................13
Abbreviations ...................................................... ....20
SERVICE INFORMATION FOR ELECTRICAL
INCIDENT ....................................................... ....
22
How to Check Terminal ...........................................22 How to Perform Efficient Diagnosis for an Electri-
cal Incident .......................................................... ....
25
Control Units and Electrical Parts ........................ ....32
CONSULT-III CHECKING SYSTEM ................. 35
Description ........................................................... ....35
Function and System Application ........................ ....35
CONSULT-III Data Link Connector (DLC) Circuit ....36
LIFTING POINT ................................................. 38
Special Service Tool ............................................ ....38
Garage Jack and Safety Stand and 2-Pole Lift ... ....38
Board-On Lift ....................................................... ....39
TOW TRUCK TOWING ..................................... 40
Tow Truck Towing ............................................... ....40
Vehicle Recovery (Freeing a Stuck Vehicle) ....... ....40
TIGHTENING TORQUE OF STANDARD
BOLTS ............................................................... 41
Tightening Torque Table ..................................... ....41
RECOMMENDED CHEMICAL PRODUCTS
AND SEALANTS ............................................... 42
Recommended Chemical Product and Sealant ... ....42
IDENTIFICATION INFORMATION .................... 43
Model Variation .................................................... ....43
Dimensions .......................................................... ....46
Wheels & Tires .................................................... ....46
TERMINOLOGY ................................................ 47
SAE J1930 Terminology List ............................... ....47

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How to Read Wiring Diagram
INFOID:0000000004307361
CONNECTOR SYMBOLS Most of connector symbols in wiring diagrams are shown from the terminal side.