sensor NISSAN LATIO 2009 Service Repair Manual

EC
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Fuel filler cap adapter
i.e.: (MLR-8382) Checks fuel tank vacuum relief valve opening
pressure
Socket wrench Removes and installs engine coolant temperature sensor
Oxygen sensor thread
cleaner
i.e.: (J-43897-18)
(J-43897-12) Reconditions 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) Lubricates oxygen sensor thread cleaning tool
when reconditioning exhaust system threads.
Tool name
(Kent-Moore No.) DescriptionS-NT705
AEM488
S-NT779

U1001
1001*4
CAN COMM CIRCUIT EC-633U1010 1010 CONTROL UNIT(CAN)
EC-635DTC*1
Items
(CONSULT-III screen terms) Reference page
CONSULT-III
GST* 2
ECM*3
P0011 0011 INT/V TIM CONT-B1 EC-636P0031 0031 A/F SEN1 HTR (B1)
EC-640P0032 0032 A/F SEN1 HTR (B1)
EC-640P0037 0037 HO2S2 HTR (B1)
EC-645P0038 0038 HO2S2 HTR (B1)
EC-645P0075 0075 INT/V TIM V/CIR-B1
EC-650DTC*1
Items
(CONSULT-III screen terms) Reference page
CONSULT-III
GST* 2
ECM*3
P0101 0101 MAF SEN/CIRCUIT-B1 EC-655P0102 0102 MAF SEN/CIRCUIT-B1
EC-663P0103 0103 MAF SEN/CIRCUIT-B1
EC-663P0112 0112 IAT SEN/CIRCUIT-B1
EC-670P0113 0113 IAT SEN/CIRCUIT-B1
EC-670P0117 0117 ECT SEN/CIRC
EC-674P0118 0118 ECT SEN/CIRC
EC-674P0122 0122 TP SEN 2/CIRC-B1
EC-679P0123 0123 TP SEN 2/CIRC-B1
EC-679P0125 0125 ECT SENSOR
EC-684P0127 0127 IAT SENSOR-B1
EC-687P0128 0128 THERMSTAT FNCTN
EC-690

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*1: 1st trip DTC No. is
the same as DTC No.
*2: This number is prescribed by SAE J2012.
*3: In Diagnostic Test Mode II (Self-diagnostic results), this number is controlled by NISSAN.
P0130-P0183 INFOID:0000000004804751
*1: 1st trip DTC No. is the same as DTC No.
*2: This number is prescribed by SAE J2012.
*3: In Diagnostic Test Mode II (Self-diagnostic results), this number is controlled by NISSAN.
P0222-P0420 INFOID:0000000004804750
*1: 1st trip DTC No. is the same as DTC No.
*2: This number is prescribed by SAE J2012.
*3: In Diagnostic Test Mode II (Self-diagnostic results), this number is controlled by NISSAN.
DTC*1
Items
(CONSULT-III screen terms) Reference page
CONSULT-III
GST* 2
ECM*3
P0130 0130 A/F SENSOR1 (B1) EC-692P0131 0131 A/F SENSOR1 (B1)
EC-698P0132 0132 A/F SENSOR1 (B1)
EC-704P0133 0133 A/F SENSOR1 (B1)
EC-710P0137 0137 HO2S2 (B1)
EC-717P0138 0138 HO2S2 (B1)
EC-724P0139 0139 HO2S2 (B1)
EC-733P0171 0171 FUEL SYS-LEAN-B1
EC-740P0172 0172 FUEL SYS-RICH-B1
EC-746P0181 0181 FTT SENSOR
EC-752P0182 0182 FTT SEN/CIRCUIT
EC-756P0183 0183 FTT SEN/CIRCUIT
EC-756DTC*1
Items
(CONSULT-III screen terms) Reference page
CONSULT-III
GST* 2
ECM*3
P0222 0222 TP SEN 1/CIRC-B1 EC-760P0223 0223 TP SEN 1/CIRC-B1
EC-760P0300 0300 MULTI CYL MISFIRE
EC-765P0301 0301 CYL 1 MISFIRE
EC-765P0302 0302 CYL 2 MISFIRE
EC-765P0303 0303 CYL 3 MISFIRE
EC-765P0304 0304 CYL 4 MISFIRE
EC-765P0327 0327 KNOCK SEN/CIRC-B1
EC-771P0328 0328 KNOCK SEN/CIRC-B1
EC-771P0335 0335 CKP SEN/CIRCUIT
EC-775P0340 0340 CMP SEN/CIRC-B1
EC-781P0420 0420 TW CATALYST SYS-B1
EC-787

P0442 0442 EVAP SMALL LEAK
EC-797P0443 0443 PURG VOLUME CONT/V
EC-804P0444 0444 PURG VOLUME CONT/V
EC-811P0445 0445 PURG VOLUME CONT/V
EC-811P0447 0447 VENT CONTROL VALVE
EC-817P0448 0448 VENT CONTROL VALVE
EC-823P0451 0451 EVAP SYS PRES SEN
EC-829P0452 0452 EVAP SYS PRES SEN
EC-832P0453 0453 EVAP SYS PRES SEN
EC-839P0455 0455 EVAP GROSS LEAK
EC-847P0456 0456 EVAP VERY SML LEAK
EC-853P0460 0460 FUEL LEV SEN SLOSH
EC-860P0461 0461 FUEL LEVEL SENSOR
EC-862P0462 0462 FUEL LEVL SEN/CIRC
EC-864P0463 0463 FUEL LEVL SEN/CIRC
EC-864DTC*1
Items
(CONSULT-III screen terms) Reference page
CONSULT-III
GST* 2
ECM*3
P0500 0500 VEH SPEED SEN/CIRC EC-866P0506 0506 ISC SYSTEM
EC-868P0507 0507 ISC SYSTEM
EC-870P0605 0605 ECM
EC-872P0643 0643 SENSOR POWER/CIRC
EC-874DTC*1
Items
(CONSULT-III screen terms) Reference page
CONSULT-III
GST* 2
ECM*3
P0705 0705 PNP SW/CIRC AT-91 (A/T),
CVT-244 (CVT)
P0710 0710 ATF TEMP SEN/CIRC AT-96 (A/T),
CVT-249 (CVT)

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*1: 1st trip DTC No. is
the same as DTC No.
*2: This number is prescribed by SAE J2012.
*3: In Diagnostic Test Mode II (Self-diagnostic results), this number is controlled by NISSAN.
P2118 2118 ETC MOT-B1
EC-935P2119 2119 ETC ACTR-B1
EC-940P2122 2122 APP SEN 1/CIRC
EC-942P2123 2123 APP SEN 1/CIRC
EC-942P2127 2127 APP SEN 2/CIRC
EC-947P2128 2128 APP SEN 2/CIRC
EC-947P2135 2135 TP SENSOR-B1
EC-954P2138 2138 APP SENSOR
EC-959P2A00 2A00 A/F SENSOR1 (B1)
EC-966DTC*1
Items
(CONSULT-III screen terms) Reference page
CONSULT-III
GST* 2
ECM*3

EC-512< SERVICE INFOMATION >
[MR TYPE 1]
PRECAUTIONS
PRECAUTIONS
Precaution for Supplemental Restraint Syst em (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER" INFOID:0000000004537013
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 “SUPPLEMENTAL RESTRAINT SYS-
TEM” and “SEAT BELTS” of this Service Manual.
WARNING:
• To avoid rendering the SRS inopera tive, 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 NISS AN/INFINITI dealer.
• Improper maintenance, including in correct removal and installation of the SRS, can lead to personal
injury caused by unintent ional activation of the system. For re moval of Spiral Cable and Air Bag
Module, see the “SUPPLEMEN TAL RESTRAINT SYSTEM”.
• Do not use electrical test equipmen t on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harn esses can be identified by yellow and/or orange harnesses or har-
ness connectors.
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING:
• When working near the Airbag Diagnosis Sensor Unit or other Airbag System sensors with the igni-
tion ON or engine running, DO NOT use air or electri c 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 minu tes before performing any service.
Precaution for Procedure without Cowl Top Cover INFOID:0000000004537014
When performing the procedure after removing cowl top cover, cover
the lower end of windshield with urethane, etc.
On Board Diagnosis (OBD) Syst em of Engine and A/T, CVT INFOID:0000000004537015
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 sw itch OFF and disconnect the battery ground cable before any repair or
inspection work. The open/short circuit of related sw itches, sensors, solenoid valves, etc. will cause
the MIL to light up.
• Be sure to connect and lock the connectors secure ly 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 descrip tion and how to disconnect, refer to PG-64, " Description " .
• 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 li ght up due to the short circuit. PIIB3706J

EC-514< SERVICE INFOMATION >
[MR TYPE 1]
PRECAUTIONS
• Keep engine control system parts and harness dry.
• Before replacing ECM, perform “ECM Terminals and Refer-
ence Value” inspection and m ake sure ECM functions prop-
erly. Refer to EC-597, " ECM Terminal and Reference Value " .
• Handle mass air flow sensor carefully to avoid damage.
• Do not disassemble m ass air flow sensor.
• Do not clean mass air flow senso r with any type of detergent.
• Do not disassemble electric throttle control actuator.
• Even a slight leak in the ai r intake system can cause serious
incidents.
• Do not shock or jar the camshaft position sensor (PHASE),
crankshaft position sensor (POS).
• After performing each TROUBLE DIAGNOSIS, perform DTC
Confirmation Procedure or Overall Function Check.
The DTC should not be displ ayed in the DTC Confirmation
Procedure if the repair is co mpleted. The Overall Function
Check should be a good result if the repair is completed.
• When measuring ECM signals with a circuit tester, never allow
the two tester probes to contact.
Accidental contact of probes will cause a short circuit and
damage the ECM power transistor.
• Do not use ECM ground termina ls when measuring input/out-
put voltage. Doing so may result in damage to the ECM's tran-
sistor. Use a ground other than ECM terminals, such as the
ground. MEF040D
SEF217U
SEF348N

PRECAUTIONS
EC-515
< SERVICE INFOMATION >
[MR TYPE 1] C
D E
F
G H
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M A EC
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•
Do not operate fuel pump when there is no fuel in lines.
• Tighten fuel hose clamps to the specified torque.
- Fuel level sensor unit and fuel pump (1)
- Fuel pressure regulator (2)
- Fuel level sensor (3)
- Fuel tank temperature sensor (4)
• Do not depress accelerator pedal when starting.
• Immediately after starting, do not rev up engine unnecessar-
ily.
• Do not rev up engine ju st 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 para llel 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. BBIA0704E
SEF709Y
SEF708Y

PREPARATION
EC-517
< SERVICE INFOMATION >
[MR TYPE 1] C
D E
F
G H
I
J
K L
M A EC
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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.
Tool number
(Kent-Moore No.)
Tool name DescriptionS-NT815
S-NT705
AEM488
S-NT779

EC
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*1: This sensor is not used to control the engine system under normal conditions.
*2: This signal is sent to the ECM through CAN communication line.
*3: ECM determines the start signal status by the signals of engine speed and battery voltage.
SYSTEM DESCRIPTION The amount of fuel injected from the fuel injector is determined by the ECM. The ECM controls the length of
time the valve remains open (injection pulse duration). T he amount of fuel injected is a program value in the
ECM memory. The program value is preset by engi ne operating conditions. These conditions are determined
by input signals (for engine speed and intake air) from t he crankshaft position sensor (POS), camshaft position
sensor (PHASE) and the mass air flow sensor.
VARIOUS FUEL INJECTION INCREASE/DECREASE COMPENSATION In addition, the amount of fuel injected is compens ated to improve engine performance under various operat-
ing conditions as listed below.

• During warm-up
• When starting the engine
• During acceleration
• Hot-engine operation
• When selector lever is changed from N to D (A/T and CVT models)
• High-load, high-speed operation

• During deceleration
• During high engine speed operation
MIXTURE RATIO FEEDBACK CONTROL (CLOSED LOOP CONTROL) Sensor Input Signal to ECM ECM function Actuator
Crankshaft position sensor (POS) Engine speed*3
Piston position
Fuel injection
& mixture ratio
control Fuel injector
Camshaft position sensor (PHASE)
Mass air flow sensor Amount of intake air
Engine coolant temperature sensor Engine coolant temperature
Air fuel ratio (A/F) sensor 1 Density of oxygen in exhaust gas
Throttle position sensor Throttle position
Accelerator pedal position sensor Accelerator pedal position
Park/neutral position (PNP) switch Gear position
Battery Battery voltage*3
Knock sensor Engine knocking condition
EPS control unit Power steering operation*2
Heated oxygen sensor 2* 1
Density of oxygen in exhaust gas
Air conditioner switch Air conditioner operation*2
ABS actuator and electric unit (control unit) Vehicle speed*2
Combination meter