Nissan Murano: Dtc/circuit Diagnosis / P0122 Tp Sensor
DTC DETECTION LOGIC
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An excessively low voltage from the TP sensor 2 is sent to ECM.
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An excessively high voltage from the TP sensor 2 is sent to ECM.
| DTC |
CONSULT screen terms (Trouble diagnosis content) |
DTC detection condition | |
| P0122 |
TP SEN 2/CIRC-B1 (Throttle/Pedal position sensor/switch “A” circuit low) |
Diagnosis condition | Start engine and let it idle |
| Signal (terminal) | Voltage signal transmitted from TP sensor 2 to ECM | ||
| Threshold | An excessively low voltage from the TP sensor 2 is sent to ECM | ||
| Diagnosis delay time | — | ||
| P0123 |
TP SEN 2/CIRC-B1 (Throttle/Pedal position sensor/switch “A” circuit high) |
Diagnosis condition | Start engine and let it idle |
| Signal (terminal) | Voltage signal transmitted from TP sensor 2 to ECM | ||
| Threshold | An excessively high voltage from the TP sensor 2 is sent to ECM | ||
| Diagnosis delay time | — | ||
POSSIBLE CAUSE
P0122
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Harness or connectors (TP sensor 2 circuit is open or shorted.)
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Electric throttle control actuator (TP sensor 2)
P0123
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Harness or connectors (TP sensor 2 circuit is open or shorted.)
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Electric throttle control actuator (TP sensor 2)
FAIL-SAFE
| Engine operating condition in fail-safe mode | ||
|---|---|---|
| Fail safe mode | Nissan Murano Vehicle behavior | |
| Throttle position sensor |
The ECM controls the electric throttle control actuator in regulating the throttle opening in order for the idle position to be within +10 degrees. The ECM regulates the opening speed of the throttle valve to be slower than the normal condition. Therefore, the acceleration will be poor. |
|
CHECK DTC PRIORITY
If DTC P0122 or P0123 is displayed with another DTC P0643, first perform the trouble diagnosis for DTC P0643.
Is applicable DTC detected?
YES>>Perform diagnosis of applicable. Refer to DTC Description.
NO>>GO TO 2.
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.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 8 V at idle.
>>
GO TO 3.
PERFORM DTC CONFIRMATION PROCEDURE
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Start engine and let it idle for 1 second.
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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 DTC PRIORITY
If DTC P0122 or P0123 is displayed with another DTC P0643, first perform the trouble diagnosis for DTC P0643.
Is applicable DTC detected?
YES>>Perform diagnosis of applicable. Refer to DTC Description.
NO>>GO TO 2.
CHECK THROTTLE POSITION SENSOR 2 POWER SUPPLY
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Disconnect electric throttle control actuator harness connector.
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Turn ignition switch ON.
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Check the voltage between electric throttle control actuator harness connector and ground.
+ − Voltage Electric throttle control actuator Connector Terminal F50 5 Ground Approx. 5 V
Is the inspection result normal?
YES>>GO TO 4.
NO>>GO TO 3.
CHECK THROTTLE POSITION SENSOR 2 POWER SUPPLY 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 electric throttle control actuator harness connector and ECM harness connector.
Electric throttle control actuator ECM Continuity Connector Terminal Connector Terminal F50 5 F79 98 Existed
Is the inspection result normal?
YES>>INSPECTION END
NO>>Repair or replace error-detected parts.
CHECK THROTTLE POSITION SENSOR 2 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 electric throttle control actuator harness connector and ECM harness connector.
Electric throttle control actuator ECM Continuity Connector Terminal Connector Terminal F50 4 F79 75 Existed -
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES>>GO TO 5.
NO>>Repair open circuit, short to ground or short to power in harness or connectors.
CHECK THROTTLE POSITION SENSOR 2 INPUT SIGNAL CIRCUIT
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Check the continuity between electric throttle control actuator harness connector and ECM harness connector.
Electric throttle control actuator ECM Continuity Connector Terminal Connector Terminal F50 3 F79 72 Existed -
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES>>GO TO 6.
NO>>Repair open circuit, short to ground or short to power in harness or connectors.
CHECK THROTTLE POSITION SENSOR
Check throttle position sensor. Refer to Component Inspection.
Is the inspection result normal?
YES>>INSPECTION END
NO>>Replace electric throttle control actuator. Refer to Exploded View.
CHECK THROTTLE POSITION SENSOR
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Turn ignition switch OFF.
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Reconnect all harness connectors disconnected.
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Perform Description.
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Turn ignition switch ON.
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Set selector lever to D position.
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Check the voltage between ECM harness connector terminals under the following conditions.
ECM Condition Voltage Connector + – Terminal F79 71 75 Accelerator pedal Fully released More than 0.36 V Fully depressed Less than 4.75 V 72 Fully released Less than 4.75 V Fully depressed More than 0.36 V
Is the inspection result normal?
YES>>INSPECTION END
NO>>Replace electric throttle control actuator. Refer to Exploded View.
P0117 Ect Sensor
DTC Description
DTC DETECTION LOGIC
An excessively low voltage from the sensor is sent to ECM.
An excessively high voltage from the sensor is sent to ECM...
P0125 Ect Sensor
DTC Description
DTC DETECTION LOGIC
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...
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The gauge indicates the approximate fuel level in the tank.
The gauge may move slightly during braking, turning, acceleration, or going up or down hills.
The gauge needle returns to 0 (Empty) after the ignition switch is placed in the OFF position.
