2010 NISSAN LATIO sensor

DTC P0127 IAT SENSOREC-701
< SERVICE INFORMATION > [MR18DE]
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1. Check resistance between mass air flow sensor (1) terminals 5
and 6 under the following conditions.
2. If NG, replace mass air flow sensor (with intake air temperature sensor).
Removal and InstallationINFOID:0000000005532535
MASS AIR FLOW SENSOR
Refer to EM-135, "Removal and Installation".
Intake air temperature [° C (°F)] Resistance (k Ω)
25 (77) 1.800 - 2.200
PBIA9559J
SEF012P
Revision: January 20102010 Versa

EC-702
< SERVICE INFORMATION >[MR18DE]
DTC P0128 THERMOSTAT FUNCTION
DTC P0128 THERMOSTAT FUNCTION
On Board Diagn
osis LogicINFOID:0000000005532536
NOTE:
If DTC P0128 is displayed with DTC P0300, P0301, P0302, P0303 or P 0304, first perform the trouble
diagnosis for DTC P0300, P0301, P0302, P0303, P0304. Refer to EC-783, "
DTC Confirmation Proce-
dure".
Engine coolant temperature has not risen enough to open the thermostat even though the engine has run long
enough. This is due to a leak in the seal or the thermostat stuck open.
DTC Confirmation ProcedureINFOID:0000000005532537
WITH CONSULT-III
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
•For best results, perform at ambient temperature of –10 °C (14° F) or higher.
• For best results, perform at en gine coolant temperature of –10 °C (14° F) to 53 °C (127 °F).
• Before performing the following procedure, do not fill with the fuel.
1. Turn A/C switch OFF.
2. Turn blower fan switch OFF.
3. Turn ignition switch ON.
4. Select “COOLAN TEMP/S” in “DATA MONITOR” mode with CONSULT-III.
5. Check the indication of “COOLAN TEMP/S”. If it is below 53 °C (127° F), go to following step.
If it is above 53 °C (127° F), cool down the engine to less than 53 °C (127° F). Then go to next steps.
6. Start engine.
7. Drive vehicle for 10 consecutive minutes under the following conditions.
If “COOLAN TEMP/S” increases to more than 75 °C (167° F) within 10 minutes, turn ignition switch
OFF because the test result will be OK.
8. Check 1st trip DTC.
9. If 1st trip DTC is detected, go to EC-702, "
Diagnosis Procedure".
WITH GST
Follow the procedure “With CONSULT-III” above.
Diagnosis ProcedureINFOID:0000000005532538
1.CHECK ENGINE COOLANT TEMPERATURE SENSOR
Refer to EC-703, "
Component Inspection".
OK or NG
OK >> GO TO 2.
NG >> Replace engine coolant temperature sensor.
2.CHECK THERMOSTAT
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0128
0128 Thermostat function The engine coolant temperature does not
reach to specified temperature even though
the engine has run long enough. • Thermostat
• Leakage from sealing portion of thermostat
• Engine coolant temperature sensor
VHCL SPEED SE
More than 56 km/h (35 MPH)
Revision: January 20102010 Versa

DTC P0128 THERMOSTAT FUNCTIONEC-703
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Refer to
CO-46, "Removal and Installation".
OK or NG
OK >> INSPECTION END
NG >> Replace thermostat.
Component InspectionINFOID:0000000005532539
ENGINE COOLANT TEMPERATURE SENSOR
1. Check resistance between engine coolant temperature sensor terminals 1 and 2 as shown in the figure.

2. If NG, replace engine coolant temperature sensor.
Removal and InstallationINFOID:0000000005532540
ENGINE COOLANT TEMPERATURE SENSOR
Refer to CO-48, "Component".
PBIB2005E
Engine coolant temperature [ °C ( °F)] Resistance (k Ω)
20 (68) 2.1 - 2.9
50 (122) 0.68 - 1.00
90 (194) 0.236 - 0.260
SEF012P
Revision: January 20102010 Versa

EC-704
< SERVICE INFORMATION >[MR18DE]
DTC P0130 A/F SENSOR 1
DTC P0130 A/F SENSOR 1
Component DescriptionINFOID:0000000005532541
The air fuel ratio (A/F) sensor 1 is a planar one-cell limit current sen-
sor. The sensor element of the
A/F sensor 1 is composed an elec-
trode layer, which transports ions. It has a heater in the element.
The sensor is capable of precise measurement = 1, but also in the
lean and rich range. Together with its control electronics, the sensor
outputs a clear, continuous signal throughout a wide range.
The exhaust gas components diffuse through the diffusion layer at
the sensor cell. An electrode layer is applied voltage, and this current
relative oxygen density in lean. Also this current relative hydrocar-
bon density in rich.
Therefore, the A/F sensor 1 is able to indicate air fuel ratio by this
electrode layer of current. In addition, a heater is integrated in the
sensor to ensure the required operating temperature of about 800° C
(1,472° F).
CONSULT-III Reference Value in Data Monitor ModeINFOID:0000000005532542
Specification data are reference values.
On Board Diagn osis LogicINFOID:0000000005532543
To judge the malfunction, the diagnosis c hecks that the A/F signal computed by ECM from the air fuel ratio (A/
F) sensor 1 signal fluctuates ac cording to fuel feedback control.
DTC Confirmation ProcedureINFOID:0000000005532544
Perform PROCEDURE FOR MALFUNCTION A first.
If the DTC cannot be confirmed, perform PROCEDURE FOR MALFUNCTION B.
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 11 V at idle.
PROCEDURE FOR MALFUNCTION A
1. Start engine and warm it up to normal operating temperature.
PBIB3353E
PBIB3354E
Monitor itemConditionSpecification
A/F SEN1 (B1) • Engine: After warming upMaintaining engine speed at
2,000 rpm Fluctuates around 2.2 V
DTC No. Trouble diagnosis name
DTC detecting conditionPossible Cause
P0130
0130 Air fuel ratio (A/F) sensor 1
circuit A)
The A/F signal computed by ECM from the A/F
sensor 1 signal is constantly in the range other
than approx. 2.2 V. • Harness or connectors
[Air fuel ratio (A/F) sensor 1 cir-
cuit is open or shorted.]
• Air fuel ratio (A/F) sensor 1
B) The A/F signal computed by ECM from the A/F
sensor 1 signal is constantly approx. 2.2 V.
Revision: January 20102010 Versa

DTC P0130 A/F SENSOR 1EC-705
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2. Let engine idle for 2 minutes.
3. Check 1st trip DTC.
4. If 1st trip DTC is detected, go to
EC-707, "
Diagnosis Procedure".
PROCEDURE FOR MALFUNCTION B
CAUTION:
Always drive vehicle at a safe speed.
With CONSULT-III
1. Start engine and warm it up to normal operating temperature.
2. Select “A/F SEN1 (B1)” in “DATA MONITOR” mode with CONSULT-III.
3. Check “A/F SEN1 (B1)” indication.
If the indication is constantly approx . 2.2 V and does not fluctuates, go to EC-707, "
Diagnosis Procedure".
If the indication fluctuates around 2.2 V, go to next step.
4. Select “A/F SEN1 (B1) P1276” (for DTC P0130) of “A/F SEN1” in “DTC WORK SUPPORT” mode with
CONSULT-III.
5. Touch “START”.
6. When the following conditions are met, “TESTIN G” will be displayed on the CONSULT-III screen.
If “TESTING” is not displayed after 20 seconds, retry from step 2.
7. Release accelerator pedal fully. NOTE:
Never apply brake during releasing the accelerator pedal.
8. Make sure that “TESTING” changes to “COMPLETED”. If “TESTING” changed to “OUT OF CONDITION”, retry from step 6.
9. Make sure that “OK” is display ed after touching “SELF-DIAG RESULT”.
If “NG” is displayed, go to EC-707, "
Diagnosis Procedure".
Overall Function CheckINFOID:0000000005532545
PROCEDURE MALFUNCTION B
Use this procedure to check the overall function of the A/F sensor 1 circuit. During this check, a 1st trip DTC
might not be confirmed.
With GST
1. Start engine and warm it up to normal operating temperature.
2. Drive the vehicle at a speed of 80 km/h (50 MPH) for a few minutes in the suitable gear position.
3. Set shift lever to D position with OD ON (A/T), D position (CVT) or 5th position (M/T), then release the accelerator pedal fully until the vehicle speed decreases to 50 km/h (30 MPH).
NOTE:
Never apply brake during releasing the accelerator pedal.
4. Repeat steps 2 and 3 for five times.
5. Stop the vehicle and turn ignition switch OFF.
6. Wait at least 10 seconds and restart engine.
7. Repeat steps 2 and 3 for five times.
8. Stop the vehicle and connect GST to the vehicle.
9. Make sure that no 1st trip DTC is displayed. If the 1st trip DTC is displayed, go to EC-707, "
Diagnosis Procedure".
ENG SPEED 1,000 - 3,200 rpm (A/T, CVT)
1,350 - 3,200 rpm (M/T)
VHCL SPEED SE More than 64 km/h (40 MPH)
B/FUEL SCHDL 1.0 - 8.0 msec
Shift lever D position with OD OFF (A/T)
D position (CVT)
5th position (M/T)
Revision: January 20102010 Versa

EC-706
< SERVICE INFORMATION >[MR18DE]
DTC P0130 A/F SENSOR 1
Wiring Diagram
INFOID:0000000005532546
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-III.
CAUTION:
AABWA0319GB
Revision: January 20102010 Versa

DTC P0130 A/F SENSOR 1EC-707
< SERVICE INFORMATION > [MR18DE]
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Do not use ECM ground terminals wh
en measuring input/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.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
Diagnosis ProcedureINFOID:0000000005532547
1.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground screw on the body. Refer to EC-638, "
Ground Inspection".
OK or NG
OK >> GO TO 2.
NG >> Repair or replace ground connections.
2.CHECK AIR FUEL RATIO (A/F) SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect A/F sensor 1 harness connector (1).
2. Turn ignition switch ON.
TERMI- NAL
NO. WIRE
COLOR ITEM
CONDITION DATA (DC Voltage)
3 G A/F sensor 1 heater [Engine is running]
•
Warm-up condition
• Idle speed (More than 140 seconds after starting
engine) Approximately 2.9 - 8.8 V
49 W A/F sensor 1 [Engine is running]
•
Warm-up condition
• Engine speed: 2,000 rpm Approximately 1.8 V
Output voltage varies with air fuel
ratio.
53 B A/F sensor 1 [Ignition switch: ON] Approximately 2.2 V
PBIA8148J
:Vehicle front
1. Body ground E24 2. Engine ground F93. Engine ground F16
4. Body ground E15
BBIA0698E
BBIA0699E
Revision: January 20102010 Versa

EC-708
< SERVICE INFORMATION >[MR18DE]
DTC P0130 A/F SENSOR 1
3. Check voltage between A/F sensor 1 terminal 4 and ground with
CONSULT-III or tester.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3.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.
4.CHECK A/F SENSOR 1 INPUT SIGN AL 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 5.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
5.CHECK INTERMITTENT INCIDENT
Perform EC-632
.
OK or NG
OK >> GO TO 6.
NG >> Repair or replace.
6.REPLACE AIR FUEL RATIO (A/F) SENSOR 1
Replace air fuel ratio (A/F) sensor 1.
CAUTION:
• Discard any A/F sensor which has b een 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.
• Before installing new A/F sensor, clean exhaust system threads using Oxygen Sensor Thread Cleaner tool J-43897-18 or J-43897-12 and approved anti-seize lubricant.
>>INSPECTION END
Voltage: Battery voltage
PBIB3308E
A/F sensor 1 terminal
ECM terminal
14 9
25 3
Continuity should exist.
Continuity should not exist.
Revision: January 20102010 Versa