Nissan Murano: Dtc/circuit Diagnosis / P0117 Ect Sensor
DTC DETECTION LOGIC
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An excessively low voltage from the sensor is sent to ECM.
-
An excessively high voltage from the sensor is sent to ECM.
| DTC |
CONSULT screen terms (Trouble diagnosis content) |
DTC detection condition | |
| P0117 |
ECT SEN/CIRC (Engine coolant temperature sensor 1 circuit low) |
Diagnosis condition | Ignition switch ON |
| Signal (terminal) | Voltage signal transmitted from engine coolant temperature sensor to ECM | ||
| Threshold | An excessively low voltage from the sensor is sent to ECM | ||
| Diagnosis delay time | — | ||
| P0118 |
ECT SEN/CIRC (Engine coolant temperature sensor 1 circuit high) |
Diagnosis condition | Ignition switch ON |
| Signal (terminal) | Voltage signal transmitted from engine coolant temperature sensor to ECM | ||
| Threshold | An excessively high voltage from the sensor is sent to ECM | ||
| Diagnosis delay time | — | ||
POSSIBLE CAUSE
P0117
-
Harness or connectors (The sensor circuit is open or shorted.)
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Engine coolant temperature sensor
P0118
-
Harness or connectors (The sensor circuit is open or shorted.)
-
Engine coolant temperature sensor
FAIL-SAFE
| Engine operating condition in fail-safe mode | |||
|---|---|---|---|
| Fail safe mode | Nissan Murano Vehicle behavior | ||
| Engine coolant temperature sensor circuit |
Engine coolant temperature will be determined by ECM based on the following condition. CONSULT displays the engine coolant temperature decided by ECM. |
||
| Condition |
Engine coolant temperature decided (CONSULT display) |
||
| Just as ignition switch is turned ON or START | 40°C (104°F) | ||
| Approx 4 minutes or more after engine starting | 80°C (176°F) | ||
| Except as shown above |
40 - 80°C (104 - 176°F) (Depends on the time) |
||
| When the fail-safe system for engine coolant temperature sensor is activated, the cooling fan operates while engine is running. | |||
PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next test.
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Turn ignition switch OFF and wait at least 10 seconds.
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Turn ignition switch ON.
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Turn ignition switch OFF and wait at least 10 seconds.
>>
GO TO 2.
PERFORM DTC CONFIRMATION PROCEDURE
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Turn ignition switch ON and wait at least 5 seconds.
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Check DTC.
Is DTC detected?
YES>>Proceed to Diagnosis Procedure.
NO>>To check malfunction symptom before repair: Refer to Intermittent Incident.
NO>>Confirmation after repair: INSPECTION END
CHECK ECT SENSOR POWER SUPPLY
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Disconnect engine coolant temperature (ECT) sensor harness connector.
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Turn ignition switch ON.
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Check the voltage between ECT sensor harness connector and ground.
ECT sensor Ground Voltage Connector Terminal F11 1 Ground Approx. 5 V
Is the inspection result normal?
YES>>GO TO 2.
NO>>Repair open circuit, short to ground or short to power in harness or connectors.
CHECK ECT SENSOR GROUND CIRCUIT
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Turn ignition switch OFF.
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Disconnect ECM harness connector.
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Check the continuity between ECT sensor harness connector and ECM harness connector.
ECT sensor ECM Continuity Connector Terminal Connector Terminal F11 2 F78 35 Existed -
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES>>GO TO 3.
NO>>Repair open circuit, short to ground or short to power in harness or connectors.
CHECK ENGINE COOLANT TEMPERATURE SENSOR
Check engine coolant temperature sensor. Refer to Component Inspection.
Is the inspection result normal?
YES>>INSPECTION END
NO>>Replace engine coolant temperature sensor. Refer to Exploded View.
CHECK ENGINE COOLANT TEMPERATURE SENSOR
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Turn ignition switch OFF.
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Disconnect engine coolant temperature sensor harness connector.
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Remove engine coolant temperature sensor. Refer to Exploded View.
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Check resistance between engine coolant temperature sensor terminals as per the following.
| ECT sensor | Condition | Resistance (kΩ) | ||
|---|---|---|---|---|
| + | − | |||
| Terminal | ||||
| 1 | 2 | Temperature [°C (°F)] | 20 (68) | 2.37 - 2.63 |
| 50 (122) | 0.68 - 1.00 | |||
| 90 (194) | 0.236 - 0.260 | |||
Is the inspection result normal?
YES>>INSPECTION END
NO>>Replace engine coolant temperature sensor. Refer to Exploded View.
P0116 Ect Sensor
DTC Description
DTC DETECTION LOGICThe comparison result of signals transmitted to ECM from each temperature sensor (IAT sensor, ECT sensor, FTT sensor, and EOT sensor) shows that the voltage signal of the ECT sensor is higher/lower than that of other temperature sensors when the engine is started with its cold state...
P0122 Tp Sensor
DTC Description
DTC DETECTION LOGIC
An excessively low voltage from the TP sensor 2 is sent to ECM.
An excessively high voltage from the TP sensor 2 is sent to ECM...
Other information:
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Nissan Murano (Z52) 2015-2024 Owners Manual: Overhead sunglasses storage
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