2008 NISSAN LATIO sensor

EC-504
< SERVICE INFORMATION >
DTC P2A00 A/F SENSOR 1
3.CHECK FOR INTAKE AIR LEAK
1. Start engine and run it at idle.
2. Listen for an intake air leak after the mass air flow sensor.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace.
4.CLEAR THE SELF-LEARNING DATA
With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Select “SELF-LEARNING CONT” in “WORK SUPPORT” mode with CONSULT-II.
3. Clear the self-learning control coefficient by touching “CLEAR”.
4. Run engine for at least 10 minutes at idle speed.
Is the 1st trip DTC P0171 and P0172 detected?
Is it difficult to start engine?
Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch OFF.
3. Disconnect mass air flow sensor (1) harness connector.
4. Restart engine and let it idle for at least 5 seconds.
5. Stop engine and reconnect mass air flow sensor harness con-
nector.
6. Make sure DTC P0102 is displayed.
7. Erase the DTC memory. Refer to EC-47, "
Emission-related
Diagnostic Information".
8. Make sure DTC P0000 is displayed.
9. Run engine for at least 10 minutes at idle speed.
Is the 1st trip DTC P0171 and P0172 detected?
Is it difficult to start engine?
Ye s o r N o
Yes >> Perform trouble diagnosis for DTC P0171 or P0172. Refer to EC-257 or EC-264.
No >> GO TO 5.
5.CHECK HARNESS CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect A/F sensor 1 harness connector (1).
- Air fuel ratio (A/F) sensor (2)
3. Check harness connector for water.
OK or NG
OK >> GO TO 6.
NG >> Repair or replace harness connector.
6.CHECK AIR FUEL RATIO (A/F) SENSOR 1 POWER SUPPLY CIRCUIT
1. Turn ignition switch ON.
PBIB2035E
BBIA0701E
Water should no exist.
BBIA0699E

DTC P2A00 A/F SENSOR 1
EC-505
< SERVICE INFORMATION >
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2. Check voltage between A/F sensor 1 terminal 4 and ground with
CONSULT-II or tester.
OK or NG
OK >> GO TO 8.
NG >> GO TO 7.
7.DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors E8, F8
• Harness for open or short between A/F sensor 1 and fuse
>> Repair or replace harness or connectors.
8.CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between the following terminals. Refer to Wiring Diagram.
4. Check harness continuity between ECM terminals 49, 53 or A/F sensor 1 terminals 1, 2 and ground.
Refer to Wiring Diagram.
5. Also check harness for short to power.
OK or NG
OK >> GO TO 9.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
9.CHECK A/F SENSOR 1 HEATER
Refer to EC-154, "
Component Inspection".
OK or NG
OK >> GO TO 10.
NG >> GO TO 11.
10.CHECK INTERMITTENT INCIDENT
Perform EC-136
.
OK or NG
OK >> GO TO 11.
NG >> Repair or replace.
11 .REPLACE AIR FUEL RATIO (A/F) SENSOR 1
Replace air fuel ratio (A/F) sensor 1.
CAUTION:
• Discard any air fuel ratio (A/F) sensor which has been dropped from a height of more than 0.5 m
(19.7 in) onto a hard surface such as a concrete floor; use a new one. Voltage: Battery voltage
PBIB3308E
A/F sensor 1 terminal ECM terminal
149
253
Continuity should exist.
Continuity should not exist.

EC-506
< SERVICE INFORMATION >
DTC P2A00 A/F SENSOR 1
• Before installing new air fuel ratio (A/F) sensor, clean exhaust system threads using Heated Oxygen
Sensor Thread Cleaner tool J-43897-18 or J-43897-12 and approved anti-seize lubricant.
>> GO TO 12.
12.CONFIRM A/F ADJUSTMENT DATA
1. Turn ignition switch ON.
2. Select “A/F ADJ-B1” in “DATA MONITOR” mode with CON-
SULT-II.
3. Make sure that “0.000” is displayed on CONSULT-II screen.
OK or NG
OK >>INSPECTION END
NG >> GO TO 13.
13.CLEAR THE SELF-LEARNGIN DATA
With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Select “SELF-LEARNING CONT” in “WORK SUPPORT” mode with CONSULT-II.
3. Clear the self-learning control coefficient by touching “CLEAR”.
Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch OFF.
3. Disconnect mass air flow sensor harness (1) connector.
4. Restart engine and let it idle for at least 5 seconds.
5. Stop engine and reconnect mass air flow sensor harness con-
nector.
6. Make sure DTC P0102 is displayed.
7. Erase the DTC memory. Refer to EC-47, "
Emission-related
Diagnostic Information".
8. Make sure DTC P0000 is displayed.
>> GO TO 14.
14.CONFIRM A/F ADJUSTMENT DATA
1. Turn ignition switch OFF and then ON.
PBIB3201E
PBIB2035E
BBIA0701E

DTC P2A00 A/F SENSOR 1
EC-507
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2. Select “A/F ADJ-B1” in “DATA MONITOR” mode with CON-
SULT-II.
3. Make sure that “0.000” is displayed on CONSULT-II screen.
>>INSPECTION END
Removal and InstallationINFOID:0000000001703047
AIR FUEL RATIO SENSOR
Refer to EM-21.
PBIB3201E

EC-526
< SERVICE INFORMATION >
FUEL PUMP
FUEL PUMP
DescriptionINFOID:0000000001703065
SYSTEM DESCRIPTION
*: ECM determines the start signal status by the signals of engine speed and battery voltage.
The ECM activates the fuel pump for several seconds after the ignition switch is turned ON to improve engine
startability. If the ECM receives a engine speed signal from the crankshaft position sensor (POS) and cam-
shaft position sensor (PHASE), it knows that the engine is rotating, and causes the pump to operate. If the
engine speed signal is not received when the ignition switch is ON, the engine stalls. The ECM stops pump
operation and prevents battery discharging, thereby improving safety. The ECM does not directly drive the fuel
pump. It controls the ON/OFF fuel pump relay, which in turn controls the fuel pump.
COMPONENT DESCRIPTION
A turbine type design fuel pump is used in the fuel tank.
• Fuel level sensor unit and fuel pump (1)
• Fuel pressure regulator (2)
• Fuel level sensor (3)
• Fuel tank temperature sensor (4)
CONSULT-II Reference Value in Data Monitor ModeINFOID:0000000001703066
Specification data are reference values.
Sensor Input Signal to ECM ECM Function Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)Engine speed*
Fuel pump control Fuel pump relay
Battery Battery voltage*
Condition Fuel pump operation
Ignition switch is turned to ON Operates for 1 second
Engine running and crankingOperates
Engine: StoppedStops in 1.5 seconds
Except as shown aboveSt ops
BBIA0704E
MONITOR ITEM CONDITION SPECIFICATION
FUEL PUMP RLY• For 1 second after turning ignition switch ON
• Engine running or crankingON
• Except above conditions OFF

FUEL PUMP
EC-529
< SERVICE INFORMATION >
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4.DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors E8, F8
• Harness for open or short between IPDM E/R and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
5.CHECK FUEL PUMP POWER SUPPLY CIRCUIT-III
1. Turn ignition switch OFF.
2. Reconnect all harness connectors disconnected.
3. Disconnect “fuel level sensor unit and fuel pump” harness con-
nector (1).
- Illustration shows the view with inspection hole cover removed.
4. Turn ignition switch ON.
5. Check voltage between “fuel level sensor unit and fuel pump”
terminal 1 and ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 9.
NG >> GO TO 6.
6.CHECK 15A FUSE
1. Turn ignition switch OFF.
2. Disconnect 15A fuse.
3. Check 15A fuse.
OK or NG
OK >> GO TO 7.
NG >> Replace fuse.
7.CHECK FUEL PUMP POWER SUPPLY CIRCUIT-IV
1. Disconnect IPDM E/R harness connector E45.
2. Check harness continuity between IPDM E/R terminal 36 and “fuel level sensor unit and fuel pump” termi-
nal 1. Refer to Wiring Diagram.
3. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 13.
NG >> GO TO 8.
8.DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors M69, E7
• Harness connectors M12, B101
BBIA0702E
Voltage: Battery voltage should exist for 1 second
after ignition switch is turned ON.
PBIB0795E
Continuity should exist.

EC-530
< SERVICE INFORMATION >
FUEL PUMP
• Harness for open or short between IPDM E/R and “fuel level sensor unit and fuel pump”
>> Repair open circuit or short to ground or short to power in harness or connectors.
9.CHECK FUEL PUMP GROUND CIRCUIT
1. Check harness continuity between “fuel level sensor unit and fuel pump” terminal 3 and ground.
Refer to Wiring Diagram.
2. Also check harness for short to power.
OK or NG
OK >> GO TO 10.
NG >> Repair or replace harness or connectors.
10.CHECK FUEL PUMP
Refer to EC-530, "
Component Inspection".
OK or NG
OK >> GO TO 11.
NG >> Replace fuel pump.
11 .CHECK INTERMITTENT INCIDENT
Refer to EC-136
.
OK or NG
OK >> Replace IPDM E/R. Refer to PG-26, "Removal and Installation of IPDM E/R".
NG >> Repair or replace harness or connectors.
Component InspectionINFOID:0000000001703069
FUEL PUMP
1. Disconnect “fuel level sensor unit and fuel pump” harness connector.
2. Check resistance between “fuel level sensor unit and fuel pump”
terminals 1 and 3.
3. If NG, replace “fuel level sensor unit and fuel pump”.
Removal and InstallationINFOID:0000000001703070
FUEL PUMP
Refer to FL-5. Continuity should exist.
Resistance: Approximately 0.2 - 5.0Ω [at 25°C (77°F)]
SEC918C

REFRIGERANT PRESSURE SENSOR
EC-541
< SERVICE INFORMATION >
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REFRIGERANT PRESSURE SENSOR
Component DescriptionINFOID:0000000001703076
The refrigerant pressure sensor (1) is installed at the condenser of
the air conditioner system. The sensor uses an electrostatic volume
pressure transducer to convert refrigerant pressure to voltage. The
voltage signal is sent to ECM, and ECM controls cooling fan system.
• : Vehicle front
BBIA0713E
PBIB2657E