Nissan Sentra Service Manual: P0117, P0118 ECT Sensor
DTC Logic
DTC DETECTION LOGIC
| DTC No. | CONSULT screen terms (Trouble diagnosis content) | DTC detecting condition | Possible cause |
| P0117 | ECT SEN/CIRC (Engine coolant temperature sensor 1 circuit low) | An excessively low voltage from the engine coolant temperature sensor is sent to ECM. |
|
| P0118 | ECT SEN/CIRC (Engine coolant temperature sensor 1 circuit high) | An excessively high voltage from the engine coolant temperature sensor is sent to ECM. |
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.
- Turn ignition switch OFF and wait at least 10 seconds.
- Turn ignition switch ON.
- Turn ignition switch OFF and wait at least 10 seconds.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
- Turn ignition switch ON and wait at least 5 seconds.
- Check DTC.
Is DTC detected? YES >> Proceed to EC-198, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure
1.CHECK ENGINE COOLANT TEMPERATURE SENSOR POWER SUPPLY
- Turn ignition switch OFF.
- Disconnect engine coolant temperature (ECT) sensor harness connector.
- Turn ignition switch ON.
- Check the voltage between ECT sensor harness connector and ground.
Is the inspection result normal? YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK ENGINE COOLANT TEMPERATURE SENSOR POWER SUPPLY CIRCUIT
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Check the continuity between ECT sensor harness connector and ECM harness connector.
- Also check harness for short to ground.
Is the inspection result normal? YES >> Perform the trouble diagnosis for power supply circuit.
NO >> Repair or replace error-detected parts.
3.CHECK ENGINE COOLANT TEMPERATURE SENSOR GROUND CIRCUIT
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Check the continuity between ECT sensor harness connector and ECM harness connector.
- Also check harness for short to ground to power.
Is the inspection result normal? YES >> GO TO 4.
NO >> Repair or replace error-detected parts.
4.CHECK ENGINE COOLANT TEMPERATURE SENSOR
Check the engine coolant temperature sensor. Refer to EC-199, "Component Inspection (ECT Sensor)".
Is the inspection result normal? YES >> Check intermittent incident. Refer to GI-39, "Intermittent Incident".
NO >> Replace engine coolant temperature sensor. Refer to CO-24, "Exploded View".
Component Inspection (ECT Sensor)
1.CHECK ENGINE COOLANT TEMPERATURE SENSOR
- Turn ignition switch OFF.
- Disconnect engine coolant temperature sensor harness connector.
- Remove engine coolant temperature sensor.
- 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".
P0116 ECT Sensor
DTC Logic
DTC DETECTION LOGIC
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P0116
ECT SEN/CIRC
(Engine coolant tem ...
P0122, P0123 TP Sensor
DTC Logic
DTC DETECTION LOGIC
NOTE:
If DTC P0122 or P0123 is displayed with DTC P0643, first perform the
trouble diagnosis for DTC P0643.
Refer to EC-353, "DTC Logic".
DTC No ...
Other materials:
Easy fill tire alert does not activate
Description
The Easy Fill Tire Alert does not function while inflating a tire when the
select lever position is in P-range with
the ignition switch ON. Refer to WT-8, "TIRE PRESSURE MONITORING SYSTEM : Easy
Fill Tire Alert Function".
Diagnosis Procedure
1. LOCATION CHANGE
Move the ...
Trip computer
When the ignition switch is placed in the ON
position, the modes of the trip
computer can be
selected by pressing the button on the
steering wheel. The following modes can be selected:
Trip A
Trip B
ECO Pedal Indicator
Instant fuel economy
Average fuel economy
Average speed
Dis ...
Service data and specifications (SDS)
General Specifications
Clutch Pedal
Clutch Disc
Clutch Cover
...