2008 NISSAN LATIO engine

EC-6
Overall Function Check .........................................406
Wiring Diagram ......................................................407
Diagnosis Procedure .............................................408
DTC P1148 CLOSED LOOP CONTROL .........411
On Board Diagnosis Logic .....................................411
DTC P1217 ENGINE OVER TEMPERATURE .412
System Description ................................................412
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
413
On Board Diagnosis Logic .....................................413
Overall Function Check .........................................413
Wiring Diagram ......................................................416
Diagnosis Procedure .............................................417
Main 13 Causes of Overheating ............................424
Component Inspection ...........................................424
DTC P1225 TP SENSOR .................................426
Component Description .........................................426
On Board Diagnosis Logic .....................................426
DTC Confirmation Procedure ................................426
Diagnosis Procedure .............................................426
Removal and Installation .......................................427
DTC P1226 TP SENSOR .................................428
Component Description .........................................428
On Board Diagnosis Logic .....................................428
DTC Confirmation Procedure ................................428
Diagnosis Procedure .............................................428
Removal and Installation .......................................429
DTC P1421 COLD START CONTROL ............430
Description .............................................................430
On Board Diagnosis Logic .....................................430
DTC Confirmation Procedure ................................430
Diagnosis Procedure .............................................430
DTC P1564 ASCD STEERING SWITCH .........432
Component Description .........................................432
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
432
On Board Diagnosis Logic .....................................432
DTC Confirmation Procedure ................................433
Wiring Diagram ......................................................434
Diagnosis Procedure .............................................435
Component Inspection ...........................................437
DTC P1572 ASCD BRAKE SWITCH ..............438
Component Description .........................................438
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
438
On Board Diagnosis Logic .....................................438
DTC Confirmation Procedure ................................439
Wiring Diagram ......................................................440
Diagnosis Procedure .............................................441
Component Inspection ...........................................445
DTC P1574 ASCD VEHICLE SPEED SEN-
SOR ..................................................................
447
Component Description .........................................447
On Board Diagnosis Logic ....................................447
DTC Confirmation Procedure ................................447
Diagnosis Procedure .............................................448
DTC P1715 INPUT SPEED SENSOR (TUR-
BINE REVOLUTION SENSOR) ........................
449
Description ............................................................449
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
449
On Board Diagnosis Logic ....................................449
Diagnosis Procedure .............................................449
DTC P1715 INPUT SPEED SENSOR (PRIMA-
RY SPEED SENSOR) .......................................
450
Description ............................................................450
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
450
On Board Diagnosis Logic ....................................450
DTC Confirmation Procedure ................................450
Diagnosis Procedure .............................................451
DTC P1805 BRAKE SWITCH ..........................452
Description ............................................................452
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
452
On Board Diagnosis Logic ....................................452
DTC Confirmation Procedure ................................452
Wiring Diagram .....................................................453
Diagnosis Procedure .............................................454
Component Inspection ..........................................455
DTC P2100, P2103 THROTTLE CONTROL
MOTOR RELAY ................................................
456
Component Description ........................................456
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
456
On Board Diagnosis Logic ....................................456
DTC Confirmation Procedure ................................456
Wiring Diagram .....................................................458
Diagnosis Procedure .............................................459
DTC P2101 ELECTRIC THROTTLE CON-
TROL FUNCTION .............................................
461
Description ............................................................461
On Board Diagnosis Logic ....................................461
DTC Confirmation Procedure ................................461
Wiring Diagram .....................................................462
Diagnosis Procedure .............................................463
Component Inspection ..........................................466
Removal and Installation .......................................466
DTC P2118 THROTTLE CONTROL MOTOR ..467
Component Description ........................................467
On Board Diagnosis Logic ....................................467
DTC Confirmation Procedure ................................467
Wiring Diagram .....................................................468
Diagnosis Procedure .............................................469
Component Inspection ..........................................470
Removal and Installation .......................................470

EC-8
Engine Coolant Temperature Sensor ....................548
Air Fuel Ratio (A/F) Sensor 1 Heater .....................549
Heated Oxygen sensor 2 Heater ...........................549
Crankshaft Position Sensor (POS) ........................549
Camshaft Position Sensor (PHASE) .....................549
Throttle Control Motor ...........................................549
Fuel Injector ..........................................................549
Fuel Pump .............................................................549

EC-10
< SERVICE INFORMATION >
INDEX FOR DTC
P0182 0182 FTT SEN/CIRCUITEC-274
P0183 0183 FTT SEN/CIRCUITEC-274
P0222 0222 TP SEN 1/CIRCEC-278
P0223 0223 TP SEN 1/CIRCEC-278
P0300 0300 MULTI CYL MISFIREEC-284
P0301 0301 CYL 1 MISFIREEC-284
P0302 0302 CYL 2 MISFIREEC-284
P0303 0303 CYL 3 MISFIREEC-284
P0304 0304 CYL 4 MISFIREEC-284
P0327 0327 KNOCK SEN/CIRC-B1EC-291
P0328 0328 KNOCK SEN/CIRC-B1EC-291
P0335 0335 CKP SEN/CIRCUITEC-295
P0340 0340 CMP SEN/CIRC-B1EC-302
P0420 0420 TW CATALYST SYS-B1EC-308
P0441 0441 EVAP PURG FLOW/MONEC-313
P0442 0442 EVAP SMALL LEAKEC-318
P0443 0443 PURG VOLUME CONT/VEC-325
P0444 0444 PURG VOLUME CONT/VEC-332
P0445 0445 PURG VOLUME CONT/VEC-332
P0447 0447 VENT CONTROL VALVEEC-338
P0448 0448 VENT CONTROL VALVEEC-345
P0451 0451 EVAP SYS PRES SENEC-351
P0452 0452 EVAP SYS PRES SENEC-355
P0453 0453 EVAP SYS PRES SENEC-362
P0455 0455 EVAP GROSS LEAKEC-370
P0456 0456 EVAP VERY SML LEAKEC-377
P0460 0460 FUEL LEV SEN SLOSHEC-385
P0461 0461 FUEL LEVEL SENSOREC-387
P0462 0462 FUEL LEVL SEN/CIRCEC-389
P0463 0463 FUEL LEVL SEN/CIRCEC-389
P0500 0500
VEH SPEED SEN/CIRC*5EC-391
P0506 0506 ISC SYSTEMEC-393
P0507 0507 ISC SYSTEMEC-395
P0605 0605 ECMEC-397
P0643 0643 SENSOR POWER/CIRCEC-400
P0705 0705 PNP SW/CIRCAT- 8 6 (A/T),
CVT-65
(CVT)
P0710 0710 ATF TEMP SEN/CIRCAT- 9 1
(A/T),
CVT-71
(CVT)
P0715 0715 INPUT SPD SEN/CIRCCVT-76
P0720 0720
VEH SPD SEN/CIR AT*5AT- 9 6 (A/T),
CVT-80
(CVT)
P0725 0725 ENGINE SPEED SIGAT- 1 0 1
DTC*1
Items
(CONSULT-II screen terms)Reference page
CONSULT-II
GST*
2ECM*3

INDEX FOR DTC
EC-13
< SERVICE INFORMATION >
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P OC L O S E D L O O P - B 1 P 11 4 8 11 4 8EC-411
CMP SEN/CIRC-B1 P0340 0340EC-302
COLD START CONTROL P1421 1421EC-430
CONTROL UNIT(CAN) U1010 1010EC-145
CTP LEARNING P1225 1225EC-426
CTP LEARNING P1226 1226EC-428
CYL 1 MISFIRE P0301 0301EC-284
CYL 2 MISFIRE P0302 0302EC-284
CYL 3 MISFIRE P0303 0303EC-284
CYL 4 MISFIRE P0304 0304EC-284
ECM P0605 0605EC-397
ECT SEN/CIRC P0117 0117EC-187
ECT SEN/CIRC P0118 0118EC-187
ECT SENSOR P0125 0125 EC-198
ENG OVER TEMP P1217 1217EC-412
ENGINE SPEED SIG P0725 0725AT- 1 0 1
ETC ACTR P2119 2119EC-472
ETC FUNCTION/CIRC P2101 2101EC-461
ETC MOT P2118 2118EC-467
ETC MOT PWR P2100 2100EC-456
ETC MOT PWR P2103 2103EC-456
EVAP GROSS LEAK P0455 0455EC-370
EVAP PURG FLOW/MON P0441 0441EC-313
EVAP SMALL LEAK P0442 0442EC-318
EVAP SYS PRES SEN P0451 0451EC-351
EVAP SYS PRES SEN P0452 0452EC-355
EVAP SYS PRES SEN P0453 0453EC-362
EVAP VERY SML LEAK P0456 0456EC-377
FTT SEN/CIRCUIT P0182 0182EC-274
FTT SEN/CIRCUIT P0183 0183EC-274
FTT SENSOR P0181 0181EC-270
FUEL LEV SEN SLOSH P0460 0460EC-385
FUEL LEVEL SENSOR P0461 0461EC-387
FUEL LEVL SEN/CIRC P0462 0462EC-389
FUEL LEVL SEN/CIRC P0463 0463EC-389
FUEL SYS-LEAN-B1 P0171 0171EC-257
FUEL SYS-RICH-B1 P0172 0172EC-264
HO2S2 (B1) P0137 0137EC-233
HO2S2 (B1) P0138 0138EC-240
HO2S2 (B1) P0139 0139EC-250
HO2S2 HTR (B1) P0037 0037EC-156
HO2S2 HTR (B1) P0038 0038EC-156
Items
(CONSULT-II screen terms)DTC*1
Reference page
CONSULT-II
GST*
2ECM*3

EC-16
< SERVICE INFORMATION >
PRECAUTIONS
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000001702548
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.
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 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 har-
ness connectors.
Precaution for Procedure without Cowl Top CoverINFOID:0000000001702549
When performing the procedure after removing cowl top cover, cover
the lower end of windshield with urethane, etc.
On Board Diagnosis (OBD) System of Engine and A/T, CVTINFOID:0000000001702550
The ECM has an on board diagnostic system. It will light up the malfunction indicator lamp (MIL) to warn the
driver of a malfunction causing emission deterioration.
CAUTION:
• Be sure to turn the ignition switch OFF and disconnect the battery ground cable before any repair or
inspection work. The open/short circuit of related switches, sensors, solenoid valves, etc. will cause
the MIL to light up.
• Be sure to connect and lock the connectors securely after work. A loose (unlocked) connector will
cause the MIL to light up due to the open circuit. (Be sure the connector is free from water, grease,
dirt, bent terminals, etc.)
• Certain systems and components, especially those related to OBD, may use a new style slide-lock-
ing type harness connector. For description and how to disconnect, refer to PG-65
.
• Be sure to route and secure the harnesses properly after work. The interference of the harness with
a bracket, etc. may cause the MIL to light up due to the short circuit.
• Be sure to connect rubber tubes properly after work. A misconnected or disconnected rubber tube
may cause the MIL to light up due to the malfunction of the fuel injection system, etc.
• Be sure to erase the unnecessary malfunction information (repairs completed) from the ECM and
TCM (Transmission control module) before returning the vehicle to the customer.
PIIB3706J

PRECAUTIONS
EC-17
< SERVICE INFORMATION >
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PrecautionINFOID:0000000001702551
•Always use a 12 volt battery as power source.
•Do not attempt to disconnect battery cables while engine is
running.
•Before connecting or disconnecting the ECM harness con-
nector, turn ignition switch OFF and disconnect negative bat-
tery cable. Failure to do so may damage the ECM because
battery voltage is applied to ECM even if ignition switch is
turned OFF.
•Before removing parts, turn ignition switch OFF and then dis-
connect negative battery cable.
•Do not disassemble ECM.
•If battery cable is disconnected, the memory will return to the
initial ECM values.
The ECM will now start to self-control at its initial values.
Engine operation can vary slightly when the cable is discon-
nected. However, this is not an indication of a malfunction. Do
not replace parts because of a slight variation.
•If the battery is disconnected, the following emission-related
diagnostic information will be lost within 24 hours.
-Diagnostic trouble codes
-1st trip diagnostic trouble codes
-Freeze frame data
-1st trip freeze frame data
-System readiness test (SRT) codes
-Test values
•When connecting ECM harness connector, fasten (B) it
securely with a lever (1) as far as it will go as shown in the fig-
ure.
-ECM (2)
-Loosen (A)
•When connecting or disconnecting pin connectors into or
from ECM, take care not to damage pin terminals (bend or
break).
Make sure that there are not any bends or breaks on ECM pin
terminal, when connecting pin connectors.
•Securely connect ECM harness connectors.
A poor connection can cause an extremely high (surge) volt-
age to develop in coil and condenser, thus resulting in dam-
age to ICs.
•Keep engine control system harness at least 10 cm (4 in) away
from adjacent harness, to prevent engine control system mal-
functions due to receiving external noise, degraded operation
of ICs, etc.
•Keep engine control system parts and harness dry.
SEF289H
PBIA9222J
PBIB2947E
PBIB0090E

PRECAUTIONS
EC-19
< SERVICE INFORMATION >
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•Do not depress accelerator pedal when starting.
•Immediately after starting, do not rev up engine unnecessar-
ily.
•Do not rev up engine just prior to shutdown.
•When installing C.B. ham radio or a mobile phone, be sure to
observe the following as it may adversely affect electronic
control systems depending on installation location.
-Keep the antenna as far as possible from the electronic con-
trol units.
-Keep the antenna feeder line more than 20 cm (8 in) away
from the harness of electronic controls.
Do not let them run parallel for a long distance.
-Adjust the antenna and feeder line so that the standing-wave
radio can be kept smaller.
-Be sure to ground the radio to vehicle body.
SEF709Y
SEF708Y

PREPARATION
EC-21
< SERVICE INFORMATION >
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Commercial Service ToolINFOID:0000000001702553
Tool number
(Kent-Moore No.)
Tool nameDescription
Leak detector
i.e.: (J-41416)Locating the EVAP leak
EVAP service port
adapter
i.e.: (J-41413-OBD)Applying positive pressure through EVAP service
port
Fuel filler cap adapter
i.e.: (MLR-8382)Checking fuel tank vacuum relief valve opening
pressure
Socket wrench Removing and installing engine coolant tempera-
ture sensor
Oxygen sensor thread
cleaner
i.e.: (J-43897-18)
(J-43897-12)Reconditioning the exhaust system threads before
installing a new oxygen sensor. Use with anti-
seize lubricant shown below.
a: 18 mm diameter with pitch 1.5 mm for Zirco-
nia Oxygen Sensor
b: 12 mm diameter with pitch 1.25 mm for Tita-
nia Oxygen Sensor
Anti-seize lubricant
i.e.: (Permatex
TM
133AR or equivalent
meeting MIL specifica-
tion MIL-A-907)Lubricating oxygen sensor thread cleaning tool
when reconditioning exhaust system threads.
S-NT703
S-NT704
S-NT815
S-NT705
AEM488
S-NT779