2011 NISSAN LATIO sensor

EC-172
< COMPONENT DIAGNOSIS >[HR16DE]
P0117, P0118 ECT SENSOR
YES >> GO TO 2.
NO >> Repair or replace ground connection.
2.CHECK ECT SENSOR POWER SUPPLY CIRCUIT
1. Disconnect engine coolant temperatur e (ECT) sensor harness connector.
2. Turn ignition switch ON.
3. Check the voltage between ECT sensor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair open circuit or short to ground or short to power in harness or connectors.
3.CHECK ECT SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between ECT sensor harness connector and ECM harness connector.
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK ENGINE COOLANT TEMPERATURE SENSOR
Refer to EC-172, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 5.
NO >> Replace engine coolant temperature sensor. Refer to CO-24, "
Exploded View".
5.CHECK INTERMITTENT INCIDENT
Refer to EC-122, "
Diagnosis Procedure".
>> INSPECTION END
Component InspectionINFOID:0000000006141195
1.CHECK ENGINE COOLANT TEMPERATURE SENSOR
1. Turn ignition switch OFF.
2. Disconnect engine coolant temperature sensor harness connector.
3. Remove engine coolant temperature sensor.
ECT sensor Ground Voltage
Connector Terminal
F6 1 Ground Approx. 5 V
PBIB0080E
ECT sensor ECM
Continuity
Connector Terminal Connector Terminal
F6 2F11 44Existed
Revision: May 2010 2011 Versa

P0117, P0118 ECT SENSOREC-173
< COMPONENT DIAGNOSIS > [HR16DE]
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4. Check resistance between engine coolant temperature sensor
terminals by heating with hot water as shown in the figure.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace engine coolant temperature sensor. Refer to CO-24, "
Exploded View".
Terminals ConditionResistance
1 and 2 Temperature [ °C ( °F)] 20 (68) 2.37 - 2.63 kΩ
50 (122) 0.68 - 1.00 k Ω
90 (194) 0.236 - 0.260 k Ω
PBIB2005E
Revision: May 2010 2011 Versa

EC-174
< COMPONENT DIAGNOSIS >[HR16DE]
P0122, P0123 TP SENSOR
P0122, P0123 TP SENSOR
DescriptionINFOID:0000000005929858
Electric throttle control actuator consists of throttle control motor,
throttle position sensor, etc. The throttle position sensor responds to
the throttle valve movement.
The throttle position sensor has two sensors. These sensors are a
kind of potentiometer which transform the throttle valve position into
output voltage, and emit the voltage signals to the ECM. The ECM
judges the current opening angle of the
throttle valve from these sig-
nals and controls the throttle valve opening angle in response to
driving conditions via the throttle control motor.
DTC LogicINFOID:0000000005929859
DTC DETECTION LOGIC
NOTE:
If DTC P0122 or P0123 is displayed with DTC P0643, first perform the tro\
ubl e diagnosis for DTC P0643.
Refer to EC-362, "
DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
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 8 V at idle.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine and let it idle for 1 second.
2. Check DTC.
Is DTC detected?
YES >> Go to EC-175, "Diagnosis Procedure".
NO >> INSPECTION END
PBIB0145E
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0122 Throttle position sensor
2 circuit low input An excessively low voltage from the TP sensor
2 is sent to ECM.
• Harness or connectors
(TP sensor 2 circuit is open or shorted.)
• Electric throttle control actuator (TP sensor 2)
P0123 Throttle position sensor
2 circuit high input An excessively high voltage from the TP sensor
2 is sent to ECM.
Revision: May 2010
2011 Versa

P0122, P0123 TP SENSOREC-175
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Wiring DiagramINFOID:0000000005929860
Diagnosis ProcedureINFOID:0000000005929861
1.CHECK GROUND CONNECTION
1. Turn ignition switch OFF.
2. Check ground connections E15, E24. Refer to EC-127, "
Ground Inspection".
Is the inspection result normal?
BBWA2656E
Revision: May 2010 2011 Versa

EC-176
< COMPONENT DIAGNOSIS >[HR16DE]
P0122, P0123 TP SENSOR
YES >> GO TO 2.
NO >> Repair or replace ground connection.
2.CHECK THROTTLE POSITION SE
NSOR 2 POWER SUPPLY CIRCUIT
1. Disconnect electric throttle control actuator harness connector.
2. Turn ignition switch ON.
3. Check the voltage between electric throttle control actuator har- ness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair open circuit or short to ground or short to power in harness or connectors.
3.CHECK THROTTLE POSITION SENSOR 2 GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between electric throttle control actuator harness connector and ECM harness con-
nector.
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK THROTTLE POSITION SENSOR 2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check the continuity between electric throttle control actuator harness connector and ECM harness con-
nector.
2. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair open circuit or short to ground or short to power in harness or connectors.
5.CHECK THROTTLE POSITION SENSOR
Refer to EC-177, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 7.
NO >> GO TO 6.
6.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace electric throttle control actuator. Refer to EM-27, "
Exploded View".
2. Perform EC-177, "
Special Repair Requirement".
>> INSPECTION END
Electric throttle control actuator Ground Voltage
Connector Terminal
F7 2 Ground Approx. 5 V
PBIB3311E
Electric throttle control actuator ECM
Continuity
Connector Terminal Connector Terminal
F7 4F11 36Existed
Electric throttle control actuator ECM
Continuity
Connector Terminal Connector Terminal
F7 3F11 34Existed
Revision: May 2010 2011 Versa

P0122, P0123 TP SENSOREC-177
< COMPONENT DIAGNOSIS > [HR16DE]
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7.CHECK INTERMITTENT INCIDENT
Refer to EC-122, "
Diagnosis Procedure".
>> INSPECTION END
Component InspectionINFOID:0000000005929862
1.CHECK THROTTLE POSITION SENSOR
1. Turn ignition switch OFF.
2. Reconnect all harness connectors disconnected.
3. Perform EC-25, "
THROTTLE VALVE CLOSED POSITION LE ARNING : Special Repair Requirement".
4. Turn ignition switch ON.
5. Set selector lever to D (A/T) or 1st (M/T) position.
6. Check the voltage between ECM harness connector and ground.
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 2.
2.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace electric throttle control actuator. Refer to EM-27, "
Exploded View".
2. Perform EC-177, "
Special Repair Requirement".
>> INSPECTION END
Special Repair RequirementINFOID:0000000005929863
1.PERFORM THROTTLE VALVE CL OSED POSITION LEARNING
Refer to EC-25, "
THROTTLE VALVE CLOSED POSITION L EARNING : Special Repair Requirement"
>> GO TO 2.
2.PERFORM IDLE AIR VOLUME LEARNING
Refer to EC-26, "
IDLE AIR VOLUME LEARNING : Special Repair Requirement"
>> END
ECM
Ground Condition Voltage
Connector Terminal
F11 33
(TP sensor
1 signal)
GroundAccelerator
pedal Fully released
More than
0.36V
Fully de-
pressed Less than
4.75V
34
(TP sensor 2 signal) Fully released
Less than
4.75V
Fully de-
pressed More than
0.36V
PBIB3038E
Revision: May 2010 2011 Versa

EC-178
< COMPONENT DIAGNOSIS >[HR16DE]
P0125 ECT SENSOR
P0125 ECT SENSOR
DescriptionINFOID:0000000006141201
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 elec trical 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 volt age. Doing so may result in damage to the ECM's transis-
tor. Use a ground other than ECM terminals, such as the ground.
DTC LogicINFOID:0000000005929865
DTC DETECTION LOGIC
NOTE:
• If DTC P0125 is displayed with P0116, first perfo rm the trouble diagnosis for DTC P0116. Refer to EC-
168, "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-170, "
DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, 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 (kΩ)
–10 (14) 4.47.0 - 11.4
20 (68) 3.52.37 - 2.63
50 (122) 2.20.68 - 1.00
90 (194) 0.90.236 - 0.260
SEF012P
DTC No. Trouble diagnosis name DTC detecting conditionPossible 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
Revision: May 2010 2011 Versa

P0125 ECT SENSOREC-179
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2. Select “DATA MONITOR” mode with CONSULT-III.
3. Check that “COOLAN TEMP/S” is above 10
°C (50° F).
With GST
Follow the procedure “With CONSULT-III” above.
Is it above 10
°C (50°F)?
YES >> INSPECTION END
NO >> GO TO 3.
3.PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT-III
1. Start engine and run it for 65 minutes at idle speed.
2. Check 1st tip DTC.
If “COOLAN TEMP/S” indicatio n increases to more than 10°C (50 °F) within 65 minutes, stop engine
because the test resu lt will be OK.
CAUTION:
Be careful not to overheat engine.
With GST
Follow the procedure “With CONSULT-III” above.
Is 1st trip DTC detected?
YES >> EC-179, "Diagnosis Procedure"
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000005929866
1.CHECK GROUND CONNECTION
1. Turn ignition switch OFF.
2. Check ground connections E15, E24. Refer to EC-127, "
Ground Inspection".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace ground connection.
2.CHECK ENGINE COOLANT TEMPERATURE SENSOR
Refer to EC-179, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 3.
NO >> Replace engine coolant temperature sensor. Refer to CO-24, "
Exploded View".
3.CHECK THERMOSTAT OPERATION
When the engine is cold [lower than 70 °C (158° F)] condition, grasp lower radiator hose and confirm the engine
coolant does not flow.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair or replace thermostat. Refer to CO-22, "
Removal and Installation".
4.CHECK INTERMITTENT INCIDENT
Refer to EC-122, "
Diagnosis Procedure".
>> INSPECTION END
Component InspectionINFOID:0000000006141196
1.CHECK ENGINE COOLANT TEMPERATURE SENSOR
1. Turn ignition switch OFF.
2. Disconnect engine coolant temperature sensor harness connector.
3. Remove engine coolant temperature sensor.
Revision: May 2010 2011 Versa