Nissan Versa Sedan. Manual - part 353

P2122, P2123 APP SENSOR

EC-411

< DTC/CIRCUIT DIAGNOSIS >

[HR16DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 2.

2.

REPLACE ACCELERATOR PEDAL ASSEMBLY

Replace accelerator pedal assembly. Refer to 

ACC-3, "Exploded View"

.

>> INSPECTION END

ECM

Condition

Voltage

Connector

Terminal

+

−

E16

110

(APP sensor 1 signal)

111

Accelerator pedal

Fully released

0.6 - 0.9 V

Fully depressed

3.9 - 4.7 V

103

(APP sensor 2 signal)

104

Fully released

0.3 - 0.6 V

Fully depressed

1.95 - 2.4 V

EC-412

< DTC/CIRCUIT DIAGNOSIS >

[HR16DE]

P2127, P2128 APP SENSOR

P2127, P2128 APP SENSOR

DTC Logic

INFOID:0000000009267286

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-

ing 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 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

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

2. Check DTC.
Is DTC detected?

YES

>> Go to 

EC-412, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009267287

1.

CHECK GROUND CONNECTION

1. Turn ignition switch OFF.

2. Check ground connection E15. Refer to Ground Inspection in 

GI-48, "Circuit Inspection"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace ground connection.

2.

CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-I

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.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P2127

Accelerator pedal position 
sensor 2 circuit low input

An excessively low voltage from the 
APP sensor 2 is sent to ECM.

• Harness or connectors

(APP sensor 2 circuit is open or shorted.)
(EVAP control system pressure sensor circuit is 
shorted.)
[Crankshaft position sensor (POS) circuit is shorted.]
(Battery current sensor circuit is shorted.)
(Refrigerant pressure sensor circuit is shorted.)

• Accelerator pedal position sensor (APP sensor 2)
• EVAP control system pressure sensor
• Crankshaft position sensor (POS)
• Battery current sensor
• Refrigerant pressure sensor

P2128

Accelerator pedal position 
sensor 2 circuit high input

An excessively high voltage from the 
APP sensor 2 is sent to ECM.

APP sensor

Ground

Voltage

Connector

Terminal

E12

5

Ground

Approx. 5 V

P2127, P2128 APP SENSOR

EC-413

< DTC/CIRCUIT DIAGNOSIS >

[HR16DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> GO TO 3.

3.

CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-II

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

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

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair open circuit or short to ground or short to power in harness or connectors.

4.

CHECK SENSOR POWER SUPPLY CIRCUIT

Check harness for short to power and short to ground, between the following terminals.

*: With A/C models
Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair short to ground or short to power in harness or connectors.

5.

CHECK COMPONENTS

Check the following.

• EVAP control system pressure sensor (Refer to 

EC-307, "Component Inspection"

).

• Battery current sensor (Refer to 

EC-368, "Component Inspection"

).

• Crankshaft position sensor (POS) (Refer to 

EC-274, "Component Inspection"

.)

• Refrigerant pressure sensor (Refer to 

EC-448, "Diagnosis Procedure"

.)

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> Replace malfunctioning component.

6.

CHECK APP SENSOR 2 GROUND CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

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

4. Also check harness for short to ground and short to power.
Is the inspection result normal?

YES

>> GO TO 7.

APP sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

E12

5

E16

102

Existed

ECM

Sensor

Connector

Terminal

Name

Connector

Terminal

F11

71

EVAP control system pressure sen-
sor

B3

3

Battery current sensor

F9

1

75

CKP sensor (POS)

F15

1

E16

101

Refrigerant pressure sensor

*

E17

3

102

Accelerator pedal position sensor 2

E12

5

APP sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

E12

1

E16

104

Existed

EC-414

< DTC/CIRCUIT DIAGNOSIS >

[HR16DE]

P2127, P2128 APP SENSOR

NO

>> Repair open circuit or short to ground or short to power in harness or connectors.

7.

CHECK APP SENSOR 2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

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

2. Also check harness for short to ground and short to power.
Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Repair open circuit or short to ground or short to power in harness or connectors.

8.

CHECK APP SENSOR

Refer to 

EC-414, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> GO TO 9.

9.

REPLACE ACCELERATOR PEDAL ASSEMBLY

Replace accelerator pedal assembly. Refer to 

ACC-3, "Exploded View"

.

>> INSPECTION END

10.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-45, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000009620504

1.

CHECK ACCELERATOR PEDAL POSITION SENSOR

1. Reconnect all harness connectors disconnected.

2. Turn ignition switch ON.

3. Check the voltage between ECM harness connector and ground.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 2.

2.

REPLACE ACCELERATOR PEDAL ASSEMBLY

Replace accelerator pedal assembly. Refer to 

ACC-3, "Exploded View"

.

>> INSPECTION END

APP sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

E12

6

E16

103

Existed

ECM

Condition

Voltage

Connector

Terminal

+

−

E16

110

(APP sensor 1 signal)

111

Accelerator pedal

Fully released

0.6 - 0.9 V

Fully depressed

3.9 - 4.7 V

103

(APP sensor 2 signal)

104

Fully released

0.3 - 0.6 V

Fully depressed

1.95 - 2.4 V