2009 NISSAN LATIO Service Repair Manual

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Page 2545 of 4331

NISSAN LATIO 2009 Service Repair Manual DTC P0116 ECT SENSOR
EC-1189
< SERVICE INFOMATION >
[MR TYPE 2] C
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DTC P0116 ECT SENSOR
Component Description INFOID:0000000004500022
The engine coolant temperature sensor

DTC P0116 ECT SENSOR
EC-1189
< SERVICE INFOMATION >
[MR TYPE 2] C
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DTC P0116 ECT SENSOR
Component Description INFOID:0000000004500022
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.

*: This data is reference value and is measured between ECM terminal 38 (Engine
coolant temperature sensor) and ground.
CAUTION:
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.
On Board Diagnosis Logic INFOID:0000000004477349
NOTE:
If DTC P0116 is displayed with P0117 or P0118, first perform the trouble diagnosis for DTC P0117,
P0118. Refer to EC-1193, " DTC Confirmation Procedure " .
DTC Confirmation Procedure INFOID:0000000004477350
NOTE:
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:
Before performing the following procedure, do not add fuel.
1. Start engine and warm it up to normal operating temperature.
2. Rev engine up to 2,000 rpm for more than10 minutes.
3. Move the vehicle to a cool place, then stop engine and turn ignition switch OFF.
4. Check resistance between “fuel level s ensor unit and fuel pump” terminals 4 and 5.
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 soaking time. SEF594K
Engine coolant temperature
°C ( °F) Voltage* V Resistance k
Ω
–10 (14) 4.4 7.0 - 11.4 20 (68) 3.5 2.1 - 2.9
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
P0116
0116 Engine coolant tempera-
ture sensor circuit range/
performance 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

Page 2546 of 4331

NISSAN LATIO 2009 Service Repair Manual EC-1190< SERVICE INFOMATION >
[MR TYPE 2]
DTC P0116 ECT SENSOR
NOTE:
Soak time changes depending on ambient ai r temperature. It may take several hours.
6. Start engine and let it idle for 5 minutes.

Page 2547 of 4331

NISSAN LATIO 2009 Service Repair Manual DTC P0116 ECT SENSOR
EC-1191
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<Reference data>
2. If NG, replace engine coolant temperature sensor.
Removal and Installation INFOID:00

Page 2548 of 4331

NISSAN LATIO 2009 Service Repair Manual EC-1192< SERVICE INFOMATION >
[MR TYPE 2]
DTC P0117, P0118 ECT SENSOR
DTC P0117, P0118 ECT SENSOR
Component Description INFOID:0000000004501092
The engine coolant temperature sensor is used to detect

Page 2549 of 4331

NISSAN LATIO 2009 Service Repair Manual EC
NP
O
DTC Confirmation Procedure
INFOID:0000000004500024
NOTE:
If DTC Confirmation Procedure has been previously conduc ted, always turn ignition switch OFF and wait at
least 10 secon

Page 2550 of 4331

NISSAN LATIO 2009 Service Repair Manual EC-1194< SERVICE INFOMATION >
[MR TYPE 2]
DTC P0117, P0118 ECT SENSOR
Wiring Diagram INFOID:0000000004500025
Diagnosis Procedure INFOID:00000000045000261.
CHECK GROUND CONNECTIONS
1. Turn ignition swi

Page 2551 of 4331

NISSAN LATIO 2009 Service Repair Manual DTC P0117, P0118 ECT SENSOR
EC-1195
< SERVICE INFOMATION >
[MR TYPE 2] C
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OK or NG OK >> GO TO 2.
NG >> Repair or replace ground connections. 2.
CHECK ECT SENSOR POWER SUP

Page 2552 of 4331

NISSAN LATIO 2009 Service Repair Manual EC-1196< SERVICE INFOMATION >
[MR TYPE 2]
DTC P0117, P0118 ECT SENSOR
Refer to EC-1190, " Component Inspection " .
OK or NG OK >> GO TO 5.
NG >> Replace engine coolant temperature sensor. 5.
CHECK IN

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