Nissan Murano: Dtc/circuit Diagnosis / P2122 App Sensor

Nissan Murano (Z52) 2015-2024 Service Manual / Engine / Engine Control System :: Vq35de / Dtc/circuit Diagnosis / P2122 App Sensor

DTC Description

DTC DETECTION LOGIC

  • An excessively low voltage from the APP sensor 1 is sent to ECM.

  • An excessively high voltage from the APP sensor 1 is sent to ECM.

DTC

CONSULT screen terms

(Trouble diagnosis content) 		DTC detection condition
P2122

APP SEN 1/CIRC

(Throttle/Pedal position sensor/switch “D” circuit low) 		Diagnosis condition Start engine and let it idle
Signal (terminal) Voltage signal transmitted from APP sensor 1 to ECM
Threshold An excessively low voltage is sent to ECM
Diagnosis delay time —
P2123

APP SEN 1/CIRC

(Throttle/Pedal position sensor/switch “D” circuit high) 		Diagnosis condition Start engine and let it idle
Signal (terminal) Voltage signal transmitted from APP sensor 1 to ECM
Threshold An excessively high voltage is sent to ECM
Diagnosis delay time —

POSSIBLE CAUSE

DTC P2122

  • Harness or connectors

    (APP sensor 1 circuit is open or shorted.)

  • Accelerator pedal position sensor

    (APP sensor 1)

DTC P2123

  • Harness or connectors

    (APP sensor 1 circuit is open or shorted.)

  • Accelerator pedal position sensor

    (APP sensor 1)

FAIL-SAFE

Engine operating condition in fail-safe mode
Fail safe mode Nissan Murano Vehicle behavior
Accelerator pedal 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.
DTC Confirmation Procedure

CHECK DTC PRIORITY

If DTC P2122 or P2123 is displayed with 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.

  1. Turn ignition switch OFF and wait at least 10 seconds.

  2. Turn ignition switch ON.

  3. Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:

Before performing the following procedure, confirm that battery voltage is more than 10 V at idle.

>>

GO TO 3.

PERFORM DTC CONFIRMATION PROCEDURE

  1. Start engine and let it idle for 1 second.

  2. 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

Diagnosis Procedure

CHECK DTC PRIORITY

If DTC P2122 or P2123 is displayed with 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 APP SENSOR 1 POWER SUPPLY

  1. Disconnect accelerator pedal position (APP) sensor harness connector.

  2. Turn ignition switch ON.

  3. Check the voltage between APP sensor harness connector and ground.

    + −

    Voltage

    (Approx.)
    APP sensor
    Connector Terminal
    E31 4 Ground 5 V

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

GO TO 3.

CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT

  1. Turn ignition switch OFF

  2. Disconnect ECM harness connector.

  3. Check the voltage between APP sensor harness connector and ground.

    APP sensor ECM Continuity
    Connector Terminal Connector Terminal
    E31 4 E32 146 Existed

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Repair or replace error-detected parts.

CHECK APP SENSOR 1 GROUND CIRCUIT

  1. Turn ignition switch OFF.

  2. Disconnect ECM harness connector.

  3. Check the continuity between APP sensor harness connector and ECM harness connector.

    APP sensor ECM Continuity
    Connector Terminal Connector Terminal
    E31 2 E32 151 Existed

  4. 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 APP SENSOR 1 INPUT SIGNAL CIRCUIT

  1. Check the continuity between APP sensor harness connector and ECM harness connector.

    APP sensor ECM Continuity
    Connector Terminal Connector Terminal
    E31 3 E32 150 Existed

  2. 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 APP SENSOR

Check APP sensor. Refer to Component Inspection.

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace accelerator pedal assembly. Refer to Removal and Installation.

Component Inspection

CHECK ACCELERATOR PEDAL POSITION SENSOR

  1. Reconnect all harness connectors disconnected.

  2. Turn ignition switch ON.

  3. Check the voltage between ECM harness connector terminals under the following conditions.

    ECM Condition Voltage (V)
    Connector + –
    Terminal
    E32 150 151 Accelerator pedal Fully released 0.5 - 1.0
    Fully depressed 4.2 - 4.8
    143 144 Fully released 0.25 - 0.50
    Fully depressed 2.0 - 2.5

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace accelerator pedal assembly. Refer to Removal and Installation.

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