2008 NISSAN LATIO Service Repair Manual

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Page 1273 of 2771

NISSAN LATIO 2008 Service Repair Manual DTC P0125 ECT SENSOR
EC-199
< SERVICE INFORMATION >
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2. Select “DATA MONITOR” mode with CONSULT-II.
3. Check that “COOLAN TEMP/S” is above 10°C (50°F).
If it i

Page 1274 of 2771

NISSAN LATIO 2008 Service Repair Manual EC-200
< SERVICE INFORMATION >
DTC P0125 ECT SENSOR
>>INSPECTION END
Component InspectionINFOID:0000000001702691
ENGINE COOLANT TEMPERATURE SENSOR
1. Check resistance between engine coolant temperatur

Page 1275 of 2771

NISSAN LATIO 2008 Service Repair Manual DTC P0127 IAT SENSOR
EC-201
< SERVICE INFORMATION >
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DTC P0127 IAT SENSOR
Component DescriptionINFOID:0000000001702693
The intake air temperature sensor is built into ma

Page 1276 of 2771

NISSAN LATIO 2008 Service Repair Manual EC-202
< SERVICE INFORMATION >
DTC P0127 IAT SENSOR
b. Select “DATA MONITOR” mode with CONSULT-II.
c. Check the engine coolant temperature.
d. If the engine coolant temperature is not less than 90

Page 1277 of 2771

NISSAN LATIO 2008 Service Repair Manual DTC P0127 IAT SENSOR
EC-203
< SERVICE INFORMATION >
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1. Check resistance between intake air temperature sensor (1) ter-
minals 5 and 6 under the following conditions.
2.

Page 1278 of 2771

NISSAN LATIO 2008 Service Repair Manual EC-204
< SERVICE INFORMATION >
DTC P0128 THERMOSTAT FUNCTION
DTC P0128 THERMOSTAT FUNCTION
On Board Diagnosis LogicINFOID:0000000001702699
Engine coolant temperature has not risen enough to open the t

EC-204
< SERVICE INFORMATION >
DTC P0128 THERMOSTAT FUNCTION
DTC P0128 THERMOSTAT FUNCTION
On Board Diagnosis LogicINFOID:0000000001702699
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:0000000001702700
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 engine coolant temperature of –10°C (14°F) to 71°C (160°F).
WITH CONSULT-II
1. Replace thermostat with new one. Refer to CO-17. Use only a genuine NISSAN thermostat as a replace-
ment. If an incorrect thermostat is used, the MIL may come on.
2. Turn ignition switch ON.
3. Select “COOLAN TEMP/S” in “DATA MONITOR” mode with
CONSULT-II.
4. Check that the “COOLAN TEMP/S” is above 71°C (160°F).
If it is below 71°C (160°F), go to following step.
If it is above 71°C (160°F), cool down the engine to less than
71°C (160°F), then retry from step 1.
5. Drive vehicle for 10 consecutive minutes under the following
conditions.
If 1st trip DTC is detected, go to EC-204, "
Diagnosis Procedure".
WITH GST
Follow the procedure “WITH CONSULT-II” above.
Diagnosis ProcedureINFOID:0000000001702701
1.CHECK ENGINE COOLANT TEMPERATURE SENSOR
Refer to EC-204, "
Component Inspection".
OK or NG
OK >>INSPECTION END
NG >> Replace engine coolant temperature sensor.
Component InspectionINFOID:0000000001702702
ENGINE COOLANT TEMPERATURE SENSOR
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0128
0128Thermostat functionThe engine coolant temperature does not reach
to specified temperature even though the en-
gine has run long enough.•Thermostat
• Leakage from sealing portion of thermo-
stat
• Engine coolant temperature sensor
VHCL SPEED SE 80 - 120 km/h (50 - 75 MPH)SEF176Y

Page 1279 of 2771

NISSAN LATIO 2008 Service Repair Manual DTC P0128 THERMOSTAT FUNCTION
EC-205
< SERVICE INFORMATION >
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1. Check resistance between engine coolant temperature sensor
terminals 1 and 2 as shown in the figure.
<Re

Page 1280 of 2771

NISSAN LATIO 2008 Service Repair Manual EC-206
< SERVICE INFORMATION >
DTC P0130 A/F SENSOR 1
DTC P0130 A/F SENSOR 1
Component DescriptionINFOID:0000000001702704
The air fuel ratio (A/F) sensor 1 is a planar one-cell limit current sen-
sor.

EC-206
< SERVICE INFORMATION >
DTC P0130 A/F SENSOR 1
DTC P0130 A/F SENSOR 1
Component DescriptionINFOID:0000000001702704
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-II Reference Value in Data Monitor ModeINFOID:0000000001702705
Specification data are reference values.
On Board Diagnosis LogicINFOID:0000000001702706
To judge the malfunction, the diagnosis checks that the A/F signal computed by ECM from the air fuel ratio (A/
F) sensor 1 signal fluctuates according to fuel feedback control.
DTC Confirmation ProcedureINFOID:0000000001702707
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 11V at idle.
PROCEDURE FOR MALFUNCTION A
PBIB3353E
PBIB3354E
MONITOR ITEM CONDITION SPECIFICATION
A/F SEN1 (B1) • Engine: After warming upMaintaining engine speed at
2,000 rpmFluctuates around 2.2V
DTC No. Trouble diagnosis name DTC detecting condition Possible Cause
P0130
0130
(Bank 1)
Air fuel ratio (A/F) sensor 1
circuitA)The A/F signal computed by ECM from the A/F
sensor 1 signal is constantly in the range other
than approx. 2.2V.• Harness or connectors
[Air fuel ratio (A/F) sensor 1 cir-
cuit is open or shorted.]
• Air fuel ratio (A/F) sensor 1 P0150
0150
(Bank 2)B)The A/F signal computed by ECM from the A/F
sensor 1 signal is constantly approx. 2.2V.

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