2009 NISSAN LATIO Service Repair Manual

height engine coolant USB turn signal spare tire location fuel filter

Load previous 8 pages

Page 1529 of 4331

NISSAN LATIO 2009 Service Repair Manual EC
NP
O
YES >> GO TO 2.
NO >> Repair or replace ground connection. YES >> GO TO 3.
NO >> Repair open circuit or short to ground or short to power
in harness or connectors. YES >> GO TO 4.
NO >> Repair

Page 1530 of 4331

NISSAN LATIO 2009 Service Repair Manual Diagnosis Procedure " .
>> INSPECTION END
Component Inspection INFOID:0000000004780094THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement " .
4. Turn ignition switch ON.
5. Set select

Page 1531 of 4331

NISSAN LATIO 2009 Service Repair Manual P0125 ECT SENSOR
EC-175
< COMPONENT DIAGNOSIS >
[HR16DE] C
D E
F
G H
I
J
K L
M A EC
NP
O
P0125 ECT SENSOR
Description INFOID:0000000004780096
The engine coolant temperature sensor is used to detect th

P0125 ECT SENSOR
EC-175
< COMPONENT DIAGNOSIS >
[HR16DE] C
D E
F
G H
I
J
K L
M A EC
NP
O
P0125 ECT SENSOR
Description INFOID:0000000004780096
The engine coolant temperature sensor is used to detect the engine
coolant temperature. The sensor modifies a voltage signal from the
ECM. The modified signal returns to the ECM as the engine coolant
temperature input. The sensor uses a thermistor which is sensitive to
the change in temperature. The electrical resistance of the ther-
mistor decreases as temperature increases.

*: These data are reference values and are measured between ECM terminal 38
(Engine coolant temperature sensor) and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output vo ltage. Doing so may result in damage to the ECM's transis-
tor. Use a ground other than ECM terminals, such as the ground.
DTC Logic INFOID:0000000004780097
DTC DETECTION LOGIC NOTE:
• If DTC P0125 is displayed with P0 116, first perform the trouble diagnosis for DTC P0116. Refer to EC-165, " DTC Logic " .
• If DTC P0125 is displayed with P0117 or P0118, fi rst perform the trouble diagnosis for DTC P0117 or
P0118. Refer to EC-167, " DTC Logic " .
DTC CONFIRMATION PROCEDURE 1.
PRECONDITIONING
If DTC Confirmation Procedure has been previously conduc ted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
>> GO TO 2. 2.
CHECK ENGINE COOLANT TEMPERATURE SENSOR FUNCTION
With CONSULT-III
1. Turn ignition switch ON. SEF594K
Engine coolant temperature
[° C ( °F)] Voltage* (V) Resistance (k
Ω)
–10 (14) 4.4 7.0 - 11.4 20 (68) 3.5 2.37 - 2.63
50 (122) 2.2 0.68 - 1.00
90 (194) 0.9 0.236 - 0.260 SEF012P
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0125 Insufficient engine coolant
temperature for closed
loop fuel control • Voltage sent to ECM from the sensor is not
practical, even when some time has passed
after starting the engine.
• Engine coolant temperature is insufficient for
closed loop fuel control. • Harness or connectors
(High resistance in the circuit)
• Engine coolant temperature sensor
• Thermostat

Page 1532 of 4331

NISSAN LATIO 2009 Service Repair Manual YES >> INSPECTION END
NO >> GO TO 3. YES >>
EC-176, " Diagnosis Procedure "
NO >> INSPECTION END
Diagnosis Procedure INFOID:0000000004780098Ground Inspection " .
Is the inspection result normal? YES >

Page 1533 of 4331

NISSAN LATIO 2009 Service Repair Manual P0125 ECT SENSOR
EC-177
< COMPONENT DIAGNOSIS >
[HR16DE] C
D E
F
G H
I
J
K L
M A EC
NP
O
4. Check resistance between engine coolant temperature sensor
terminals by heating with hot water as show

Page 1534 of 4331

NISSAN LATIO 2009 Service Repair Manual EC-178< COMPONENT DIAGNOSIS >
[HR16DE]
P0127 IAT SENSOR
P0127 IAT SENSOR
Description INFOID:0000000004780100
The intake air temperature sensor is built-into mass air flow sensor
(1). The se

EC-178< COMPONENT DIAGNOSIS >
[HR16DE]
P0127 IAT SENSOR
P0127 IAT SENSOR
Description INFOID:0000000004780100
The intake air temperature sensor is built-into mass air flow sensor
(1). The sensor detects intake air temperature and transmits a signal
to the ECM.
The temperature sensing unit uses a thermistor which is sensitive to
the change in temperature. Electrical resistance of the thermistor
decreases in response to the temperature rise.

*: These data are reference values and are measured between ECM terminal 46
(Intake air temperature sensor) and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing
so may result in damage to the ECM's transistor. Use a ground other than ECM
terminals, such as the ground.
DTC Logic INFOID:0000000004780101
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE 1.
PRECONDITIONING
If DTC Confirmation Procedure has been previously conduc ted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
This test may be conducted with the drive wheels lifted in the shop or by driving the vehicle. If a road
test is expected to be easier, it is unnecessary to lift the vehicle.
>> GO TO 2. 2.
PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT-III
1. Wait until engine coolant temperature is less than 96 °C (205 °F)
- Turn ignition switch ON.
- Select “DATA MONITOR” mode with CONSULT-III.
- Check the engine coolant temperature.
- If the engine coolant temperature is not less than 96 °C (205 °F), turn ignition switch OFF and cool down
engine. PBIA9559J
Intake air temperature
[° C ( °F)] Voltage* (V) Resistance (k
Ω)
25 (77) 3.3 1.800 - 2.200
80 (176) 1.2 0.283 - 0.359 SEF012P
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0127 Intake air temperature
too high Rationally incorrect voltage from the sensor is
sent to ECM, compared with the voltage signal
from engine coolant temperature sensor. • Harness or connectors
(The sensor circuit is open or shorted)
• Intake air temperature sensor

Page 1535 of 4331

NISSAN LATIO 2009 Service Repair Manual EC
NP
O
NOTE:
Perform the following steps before engine coolant temperature is above 96 °C (205 °F).
2. Turn ignition switch ON.
3. Select “DATA MONITOR” mode with CONSULT-III.
4. Start engine.

Page 1536 of 4331

NISSAN LATIO 2009 Service Repair Manual DTC Logic " .
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 CO

Load next 8 pages

Page: < prev 1-10 ... 1497-1504 1505-1512 1513-1520 1521-1528 1529-1536 1537-1544 1545-1552 1553-1560 1561-1568 ... 4336 next >

start stop button oil additives suspension coolant level hood open deactivate passenger airbag