Nissan Sentra manuals

Nissan Sentra Service Manual: P2122, P2123 APP Sensor

Nissan Sentra Service Manual / Engine / Engine control system / Dtc/circuit diagnosis / P2122, P2123 APP Sensor

DTC Logic

DTC DETECTION LOGIC

NOTE:

If DTC P2122 or P2123 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.

Refer to EC-353, "DTC Logic".

DTC No.

 CONSULT screen terms (Trouble diagnosis content)

 DTC detecting condition

 Possible cause
P2122 APP SEN 1/CIRC (Throttle/Pedal position sensor/switch “D” circuit low) An excessively low voltage from the APP sensor 1 is sent to ECM.
  • Harness or connectors (APP sensor 1 circuit is open or shorted.)
  • Accelerator pedal position sensor (APP sensor 1)
P2123 APP SEN 1/CIRC (Throttle/Pedal position sensor/switch “D” circuit high) An excessively high voltage from the APP sensor 1 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.

  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 8 V at idle.

>> GO TO 2.

2.PERFORM DTC CONFIRMATION PROCEDURE

  1. Start engine and let it idle for 1 second.
  2. Check DTC.

Is DTC detected? YES >> Proceed to EC-432, "Diagnosis Procedure".

NO >> INSPECTION END

Diagnosis Procedure

1.CHECK APP SENSOR 1 POWER SUPPLY

  1. Turn ignition switch OFF.
  2. Disconnect accelerator pedal position (APP) sensor harness connector.
  3. Turn ignition switch ON.
  4. Check the voltage between APP sensor harness connector and ground.

Is the inspection result normal?


Is the inspection result normal? YES >> GO TO 3.

NO >> GO TO 2.

2.CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT

  1. Turn ignition switch OFF.
  2. Disconnect ECM harness connector.
  3. Check the continuity between APP sensor harness connector and ECM harness connector.


  1. 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 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.


  1. Also check harness for short to power.

Is the inspection result normal? YES >> GO TO 4.

NO >> Repair or replace error-detected parts.

4.CHECK APP SENSOR 1 INPUT SIGNAL CIRCUIT

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


  1. Also check harness for short to ground and to power.

Is the inspection result normal? YES >> GO TO 5.

NO >> Repair or replace error-detected parts.

5.CHECK APP SENSOR

Check APP sensor. Refer to EC-433, "Component Inspection (APP Sensor)".

Is the inspection result normal? YES >> Check intermittent incident. Refer to GI-39, "Intermittent Incident".

NO >> Replace accelerator pedal assembly. Refer to ACC-3, "Removal and Installation".

Component Inspection (APP Sensor)

1.CHECK ACCELERATOR PEDAL POSITION SENSOR

  1. Turn ignition switch OFF.
  2. Reconnect all harness connectors disconnected.
  3. Turn ignition switch ON.
  4. Check the voltage between ECM harness connector terminals as per the following condition.

Is the inspection result normal?


Is the inspection result normal? YES >> INSPECTION END

NO >> Replace accelerator pedal assembly. Refer to ACC-3, "Removal and Installation".

P2119 Electric throttle control actuator
DTC Logic DTC DETECTION LOGIC DTC No. CONSULT screen terms (Trouble diagnosis content) DTC detecting condition Possible cause P2119 ETC ACTR-B1 (Throttle actuator c ...

P2127, P2128 APP Sensor
DTC Logic DTC DETECTION LOGIC DTC No. CONSULT screen terms (Trouble diagnosis content) DTC detecting condition Possible cause P2127 APP SEN 2/CIRC (Throttle/Pedal p ...

Other materials:

Precaution for work
When removing or disassembling each component, be careful not to damage or deform it. If a component may be subject to interference, be sure to protect it with a shop cloth. When removing (disengaging) components with a screwdriver or similar tool, be sure to wrap the component with a ...

Rear drum brake
BRAKE LINING BRAKE LINING : Inspection INSPECTION Brake Lining Check brake lining wear thickness (A). Check using a scale if necessary. Lining wear thickness (A) : Refer to BR-55, "Rear Drum Brake". BRAKE DRUM BRAKE DRUM : Inspection INSPECTION Appearance Check surfac ...

Tire chains
CAUTION Tire chains/cables should not be installed on P205/50R17 size tires. Installation of the tire chains/cables on P205/50R17 size tires will cause damage to the vehicle. If you plan to use tire chains/cables, you should install P205/55R16 size tires on your vehicle. Use of tire chains m ...

© 2014-2020 Copyright www.nisentra.com