2011 NISSAN LATIO ignition

P0112, P0113 IAT SENSOREC-165
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Wiring DiagramINFOID:0000000005929846
Diagnosis ProcedureINFOID:0000000005929847
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?
BBWA2633E
Revision: May 2010 2011 Versa

EC-166
< COMPONENT DIAGNOSIS >[HR16DE]
P0112, P0113 IAT SENSOR
YES >> GO TO 2.
NO >> Repair or replace ground connection.
2.CHECK INTAKE AIR TEMPERATURE
SENSOR POWER SUPPLY CIRCUIT
1. Disconnect mass air flow sensor (with intake air temperature sensor) harness connector.
2. Turn ignition switch ON.
3. Check the voltage between mass air flow sensor harness con- nector 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 INTAKE AIR TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between mass air flow 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 INTAKE AIR TEMPERATURE SENSOR
Refer to EC-166, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 5.
NO >> Replace mass air flow sensor (with intake air temperature sensor). Refer to EM-25, "
Exploded
View".
5.CHECK INTERMITTENT INCIDENT
Refer to EC-122, "
Diagnosis Procedure".
>> INSPECTION END
Component InspectionINFOID:0000000005929848
1.CHECK INTAKE AIR TEMPERATURE SENSOR
1. Turn ignition switch OFF.
2. Disconnect mass air flow sensor harness connector.
3. Check resistance between mass air flow sensor terminals as per the following.
Is the inspection result normal?
YES >> INSPECTION END
MAF sensor Ground Voltage
Connector Terminal
F31 5 Ground Approx. 5 V
PBIB1169E
MAF sensor ECM
Continuity
Connector Terminal Connector Terminal
F31 6F11 55Existed
Terminals Condition Resistance (kΩ)
1 and 2 Intake air temperature [ °C ( °F)] 25 (77) 1.800 - 2.200
Revision: May 2010 2011 Versa

EC-168
< COMPONENT DIAGNOSIS >[HR16DE]
P0116 ECT SENSOR
P0116 ECT SENSOR
DescriptionINFOID:0000000005929849
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:0000000005929850
DTC DETECTION LOGIC
NOTE:
If DTC P0116 is displayed with P0117 or P0118, first perform the trouble diagnosis for DTC P0117,
P0118. Refer to EC-170, "
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.PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine and warm it up to normal operating temperature.
2. Rev engine up to 2,000 rpm for more than 10 minutes.
3. Move the vehicle to a cool place, then stop engine and turn ignition switch OFF.
4. Check resistance between “fuel level sensor unit and fuel pump” terminals 4 and 5.
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
P0116 Engine coolant temperature
sensor circuit range/perfor-
mance Engine coolant temperature signal from engine
coolant temperature sensor does not fluctuate,
even when some time has passed after starting
the engine with pre-warming up condition. • Harness or connectors
(High or low resistance in the circuit)
• Engine coolant temperature sensor
Revision: May 2010 2011 Versa

P0116 ECT SENSOREC-169
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5. Soak the vehicle until the resistance between “fuel
level sensor unit and fuel pump” terminals 4 and 5
becomes 0.5 k Ω higher than the value measured before soaking.
CAUTION:
Never turn ignition switch ON during the soaking time.
NOTE:
Soak time changes depending on ambient air temperature. It may take several hours.
6. Start engine and let it idle for 20 minutes.
7. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> EC-169, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000005929851
1.CHECK GROUND CONNECTION
1. Turn ignition switch OFF.
2. Check ground connections E15, 24. 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-169, "
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 INTERMITTENT INCIDENT
Refer to EC-122, "
Diagnosis Procedure".
>> INSPECTION END
Component InspectionINFOID:0000000005929852
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.
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-170
< COMPONENT DIAGNOSIS >[HR16DE]
P0117, P0118 ECT SENSOR
P0117, P0118 ECT SENSOR
DescriptionINFOID:0000000006141200
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:0000000005929854
DTC DETECTION 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.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON and wait at least 5 seconds.
2. Check DTC.
Is DTC detected?
YES >> Go to EC-171, "Diagnosis Procedure".
NO >> INSPECTION END
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
P0117 Engine coolant temperature
sensor circuit low input An excessively low voltage from the sensor
is sent to ECM.
• Harness or connectors
(The sensor circuit is open or shorted.)
• Engine coolant temperature sensor
P0118 Engine coolant temperature
sensor circuit high input An excessively high voltage from the sensor
is sent to ECM.
Revision: May 2010
2011 Versa

P0117, P0118 ECT SENSOREC-171
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Wiring DiagramINFOID:0000000005929855
Diagnosis ProcedureINFOID:0000000005929856
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?
BBWA2634E
Revision: May 2010 2011 Versa

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

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