Nissan Sentra. Manual - part 436

EC-440

< DTC/CIRCUIT DIAGNOSIS >

[MRA8DE]

P2135 TP SENSOR

2. Reconnect all harness connectors disconnected.

3. Perform “ Throttle Valve Closed Position Learning”. Refer to 

EC-139, "Work Procedure"

.

4. Turn ignition switch ON.

5. Set selector lever to D (CVT) or 1st (M/T) position.

6. Check the voltage between ECM harness connector terminals as per the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace electric throttle control actuator. Refer to 

EM-27, "Removal and Installation"

.

ECM

Condition

Voltage

Connec-

tor

+

−

Terminal

F25

77

78

Accelerator 
pedal

Fully released

Less than 4.75 V

Fully depressed

More than 0.36 V

79

Fully released

More than 0.36 V

Fully depressed

Less than 4.75 V

P2138 APP SENSOR

EC-441

< DTC/CIRCUIT DIAGNOSIS >

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D

E

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P2138 APP SENSOR

DTC Logic

INFOID:0000000009758698

DTC DETECTION LOGIC

NOTE:

If DTC P2138 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to

EC-353, "DTC Logic"

.

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-441, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009758699

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?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

DTC No.

CONSULT screen terms

(Trouble diagnosis con-

tent)

DTC detecting condition

Possible cause

P2138

APP SENSOR
(Throttle/Pedal position 
sensor/switch “D” / “E” 
voltage correlation)

Rationally incorrect voltage is sent to ECM 
compared with the signals from APP sensor 
1 and APP sensor 2.

• Harness or connector

(APP sensor 1 or 2 circuit is open or 
shorted.)

• Accelerator pedal position sensor

(APP sensor 1 or 2)

• Sensor power supply 2 circuit

+

−

Voltage

(Approx.)

APP sensor

Connector

Terminal

E12

4

Ground

5.0 V

EC-442

< DTC/CIRCUIT DIAGNOSIS >

[MRA8DE]

P2138 APP SENSOR

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.
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 2 POWER SUPPLY

Check the voltage between APP sensor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 4.

4.

CHECK SENSOR POWER SUPPLY 2 CIRCUIT

Check sensor power supply 2 circuit. Refer to 

EC-444, "Diagnosis Procedure"

.

Is inspection result normal?

YES

>> Perform the trouble diagnosis for power supply circuit.

NO

>> Repair or replace error-detected parts.

5.

CHECK APP SENSOR 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.

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

YES

>> GO TO 6.

NO

>> Repair or replace error-detected parts.

6.

CHECK APP SENSOR INPUT SIGNAL CIRCUIT

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

+

−

Continuity

APP sensor

ECM

Connector

Terminal

Connector

Terminal

E12

4

E16

122

Existed

+

−

Voltage

(Approx.)

APP sensor

Connector

Terminal

E12

5

Ground

5.0 V

+

−

Continuity

APP sensor

ECM

Connector

Terminal

Connector

Terminal

E12

1

E16

120

Existed

2

127

P2138 APP SENSOR

EC-443

< DTC/CIRCUIT DIAGNOSIS >

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

YES

>> GO TO 7.

NO

>> Repair or replace error-detected parts

7.

CHECK APP SENSOR

Check APP sensor. Refer to 

EC-443, "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)

INFOID:0000000009758700

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?

YES

>> INSPECTION END

NO

>> Replace accelerator pedal assembly. Refer to 

ACC-3, "Removal and Installation"

.

+

−

Continuity

APP sensor

ECM

Connector

Terminal

Connector

Terminal

E12

3

E16

126

Existed

6

119

ECM

Condition

Voltage

Connector

+

−

Terminal

E16

126

127

Accelerator pedal

Fully released

0.6 - 0.9 V

Fully depressed

3.9 - 4.7 V

119

120

Fully released

0.3 - 0.6 V

Fully depressed

1.95 - 2.4 V