Nissan Pathfinder (2012 year). Manual - part 352

EC-623, "Ground Inspection"

OK or NG

>> GO TO 2.

>> Repair or replace ground connections.

CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT

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

connector.

2. Turn ignition switch ON.

3. Check voltage between APP sensor terminal 2 and ground with

CONSULT or tester.

OK or NG

>> GO TO 3.

>> Repair open circuit or short to ground or short to power

in harness or connectors.

CHECK APP SENSOR 1 GROUND CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

3. Check harness continuity between ECM terminal 82 and APP sensor terminal 4.

Refer to Wiring Diagram.

4. Also check harness for short to ground and short to power.
OK or NG

>> GO TO 4.

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

CHECK APP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1. Check harness continuity between ECM terminal 106 and APP sensor terminal 3.

Refer to Wiring Diagram.

BBIA0539E

AWBIA0079ZZ

Voltage: Approximately 5 V

PBIB2608E

Continuity should exist.

August 2012

2012 Pathfinder

EC-898

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

P2122, P2123 APP SENSOR

2. Also check harness for short to ground and short to power.
OK or NG

>> GO TO 5.

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

CHECK APP SENSOR

EC-898, "Component Inspection"

OK or NG

>> GO TO 7.

>> GO TO 6.

REPLACE ACCELERATOR PEDAL ASSEMBLY

1. Replace the accelerator pedal assembly. Refer to

ACC-4

2. Perform

EC-597, "Accelerator Pedal Released Position Learning"

3. Perform

4. Perform

INSPECTION END

CHECK INTERMITTENT INCIDENT

GI-37, "Intermittent Incident"

INSPECTION END

Component Inspection

INFOID:0000000007358813

ACCELERATOR PEDAL POSITION SENSOR

1. Reconnect all harness connectors disconnected.
2. Turn ignition switch ON.
3. Check voltage between ECM terminals 106 (APP sensor 1 sig-

nal), 98 (APP sensor 2 signal) and ground under the following

conditions.

4. If NG, replace accelerator pedal assembly, refer to

ACC-4

, and go to next step.

5. Perform

EC-597, "Accelerator Pedal Released Position Learning"

6. Perform

7. Perform

EC-899, "Diagnosis Procedure"

Terminal

Accelerator pedal

Voltage

106
(Accelerator pedal position
sensor 1)

Fully released

0.65 - 0.87V

Fully depressed

More than 4.3V

98
(Accelerator pedal position
sensor 2)

Fully released

0.28 - 0.48V

Fully depressed

More than 2.0V

MBIB0023E

August 2012

2012 Pathfinder

P2127, P2128 APP SENSOR

EC-899

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

P2127, P2128 APP SENSOR

Component Description

INFOID:0000000007358814

The accelerator pedal position sensor is installed on the upper end

of the accelerator pedal assembly. The sensor detects the accelera-

tor position and sends a signal to the ECM.

Accelerator pedal position sensor has two sensors. These sensors

are a kind of potentiometer which transform the accelerator pedal

position into output voltage, and emit the voltage signal to the ECM.

The ECM judges the current opening angle of the accelerator pedal

from these signals and controls the throttle valve in response to driv-

ing conditions via the throttle control motor.

Idle position of the accelerator pedal is determined by the ECM

receiving the signal from the accelerator pedal position sensor. The

ECM uses this signal for the engine operation such as fuel cut.

On Board Diagnosis Logic

INFOID:0000000007358815

These self-diagnoses have the one trip detection logic.

FAIL-SAFE MODE

When the malfunction is detected, ECM enters fail-safe mode and the MIL illuminates.

DTC Confirmation Procedure

INFOID:0000000007358816

NOTE:

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure

before conducting the next step.

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.

1. Start engine and let it idle for 1 second.
2. Check DTC.
3. If DTC is detected, go to

Diagnosis Procedure

INFOID:0000000007358817

CHECK GROUND CONNECTIONS

1. Turn ignition switch OFF.

2. Loosen and retighten ground screws on the body.

PBIB1741E

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P2127
2127

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.)
(TP sensor circuit is shorted.)

• Accelerator pedal position sensor

(Accelerator pedal position sensor 2)

• Electric throttle control actuator

(TP sensor)

P2128
2128

Accelerator pedal position
sensor 2 circuit high input

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

Engine operating condition in fail-safe mode

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.
So, the acceleration will be poor.

August 2012

2012 Pathfinder

EC-900

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

P2127, P2128 APP SENSOR

EC-623, "Ground Inspection"

OK or NG

>> GO TO 2.

>> Repair or replace ground connections.

CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-I

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

connector.

2. Turn ignition switch ON.

3. Check voltage between APP sensor terminal 1 and ground with

CONSULT or tester.

OK or NG

>> GO TO 7.

>> GO TO 3.

CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-II

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

3. Check harness continuity between APP sensor terminal 1 and ECM terminal 91.

Refer to Wiring Diagram.

OK or NG

>> GO TO 4.

>> Repair open circuit.

CHECK SENSOR POWER SUPPLY CIRCUIT

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

BBIA0539E

AWBIA0079ZZ

Voltage: Approximately 5 V

PBIB2611E

Continuity should exist.

ECM terminal

Sensor terminal

Reference Wiring Diagram

Electric throttle control actuator terminal 2

EC-567, "Wiring Diagram"

APP sensor terminal 1

August 2012

2012 Pathfinder

P2127, P2128 APP SENSOR

EC-901

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

OK or NG

>> GO TO 5.

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

CHECK THROTTLE POSITION SENSOR

EC-906, "Component Inspection"

OK or NG

>> GO TO 11.

>> GO TO 6.

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1. Replace the electric throttle control actuator. Refer to

EM-165

2. Perform

3. Perform

INSPECTION END

CHECK APP SENSOR 2 GROUND CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

3. Check harness continuity between ECM terminal 83 and APP sensor terminal 5.

Refer to Wiring Diagram.

4. Also check harness for short to ground and short to power.
OK or NG

>> GO TO 8.

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

CHECK APP SENSOR 2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1. Check harness continuity between ECM terminal 98 and APP sensor terminal 6.

Refer to Wiring Diagram.

2. Also check harness for short to ground and short to power.
OK or NG

>> GO TO 9.

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

CHECK APP SENSOR

EC-902, "Component Inspection"

OK or NG

>> GO TO 11.

>> GO TO 10.

10.

REPLACE ACCELERATOR PEDAL ASSEMBLY

1. Replace the accelerator pedal assembly. Refer to

EM-165

2. Perform

EC-597, "Accelerator Pedal Released Position Learning"

3. Perform

4. Perform

INSPECTION END

11.

CHECK INTERMITTENT INCIDENT

GI-37, "Intermittent Incident"

Continuity should exist.

August 2012

2012 Pathfinder

EC-902

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

P2127, P2128 APP SENSOR

INSPECTION END

Component Inspection

INFOID:0000000007358818

ACCELERATOR PEDAL POSITION SENSOR

1. Reconnect all harness connectors disconnected.
2. Turn ignition switch ON.
3. Check voltage between ECM terminals 106 (APP sensor 1 sig-

nal), 98 (APP sensor 2 signal) and ground under the following

conditions.

4. If NG, replace accelerator pedal assembly and go to next step. Refer to

ACC-4

5. Perform

EC-597, "Accelerator Pedal Released Position Learning"

6. Perform

7. Perform

EC-903, "Diagnosis Procedure"

Terminal

Accelerator pedal

Voltage

106
(Accelerator pedal position
sensor 1)

Fully released

0.65 - 0.87V

Fully depressed

More than 4.3V

98
(Accelerator pedal position
sensor 2)

Fully released

0.28 - 0.48V

Fully depressed

More than 2.0V

MBIB0023E

August 2012

2012 Pathfinder

P2135 TP SENSOR

EC-903

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

P2135 TP SENSOR

Component Description

INFOID:0000000007358819

Electric throttle control actuator consists of throttle control motor,

throttle position sensor, etc. The throttle position sensor responds to

the throttle valve movement.

The throttle position sensor has the two sensors. These sensors are

a kind of potentiometer which transform the throttle valve position

into output voltage, and emit the voltage signals to the ECM. The

ECM judges the current opening angle of the throttle valve from

these signals and controls the throttle valve in response to driving

conditions via the throttle control motor.

On Board Diagnosis Logic

INFOID:0000000007358820

This self-diagnosis has the one trip detection logic.

FAIL-SAFE MODE

When the malfunction is detected, the ECM enters fail-safe mode and the MIL illuminates.

DTC Confirmation Procedure

INFOID:0000000007358821

NOTE:

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure

before conducting the next step.

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.

1. Start engine and let it idle for 1 second.
2. Check DTC.
3. If DTC is detected, go to

Diagnosis Procedure

INFOID:0000000007358822

CHECK GROUND CONNECTIONS

1. Turn ignition switch OFF.

2. Loosen and retighten ground screws on the body.

PBIB0145E

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P2135
2135

Throttle position sensor
circuit range/performance

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

• Harness or connector

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

• Electric throttle control actuator

(TP sensor 1 and 2)

• Accelerator pedal position sensor

(APP sensor 2)

Engine operation condition in fail-safe mode

August 2012

2012 Pathfinder

EC-904

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

P2135 TP SENSOR