Nissan Pathfinder (2005 year). Instruction — part 225

DTC P2138 APP SENSOR

EC-651

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2005 Pathfinder

DTC Confirmation Procedure

UBS00KHQ

NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10V at idle.

WITH CONSULT-II

1.

Turn ignition switch ON.

2.

Select “DATA MONITOR” mode with CONSULT-II.

3.

Start engine and let it idle for 1 second.

4.

If DTC is detected, go to

EC-653, "Diagnostic Procedure"

.

WITH GST

Follow the procedure “WITH CONSULT-II” above.

SEF058Y

EC-652

DTC P2138 APP SENSOR

2005 Pathfinder

Wiring Diagram

UBS00KHR

BBWA1749E

DTC P2138 APP SENSOR

EC-653

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2005 Pathfinder

Specification data are reference values and are measured between each terminal and ground.

CAUTION:

Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.

Diagnostic Procedure

UBS00KHS

1.

CHECK GROUND CONNECTIONS

1.

Turn ignition switch OFF.

2.

Loosen and retighten three ground screws on the body. Refer to

EC-165, "Ground Inspection"

.

OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace ground connections.

TER-

MINAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

47

L

Sensor power supply
(Throttle position sensor)

[Ignition switch: ON]

Approximately 5V

82

B

Sensor ground
(APP sensor 1)

[Engine is running]

●

Warm-up condition

●

Idle speed

Approximately 0V

83

GR

Sensor ground
(APP sensor 2)

[Engine is running]

●

Warm-up condition

●

Idle speed

Approximately 0V

90

L

Sensor power supply
(APP sensor 1)

[Ignition switch: ON]

Approximately 5V

91

G

Sensor power supply
(APP sensor 2)

[Ignition switch: ON]

Approximately 5V

98

GR

Accelerator pedal position
sensor 2

[Ignition switch: ON]

●

Engine: Stopped

●

Accelerator pedal: Fully released

0.28 - 0.48V

[Ignition switch: ON]

●

Engine: Stopped

●

Accelerator pedal: Fully depressed

More than 2.0V

106

R

Accelerator pedal position
sensor 1

[Ignition switch: ON]

●

Engine: Stopped

●

Accelerator pedal: Fully released

0.65 - 0.87V

[Ignition switch: ON]

●

Engine: Stopped

●

Accelerator pedal: Fully depressed

More than 4.3V

BBIA0539E

EC-654

DTC P2138 APP SENSOR

2005 Pathfinder

2.

CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT

1.

Disconnect accelerator pedal position (APP) sensor harness connector.

2.

Turn ignition switch ON.

3.

Check voltage between APP sensor terminals 2 and ground with
CONSULT-II or tester.

OK or NG

OK

>> GO TO 3.

NG

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

in harness or connectors.

3.

CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-I

Check voltage between APP sensor terminal 1 and ground with
CONSULT-II or tester.

1.

OK or NG

OK

>> GO TO 8.

NG

>> GO TO 4.

4.

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

OK

>> GO TO 5.

NG

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

Voltage: Approximately 5V

BBIA0556E

PBIB2608E

Voltage: Approximately 5V

PBIB2611E

Continuity should exist.

DTC P2138 APP SENSOR

EC-655

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5.

CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-III

Check the following.

●

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

OK or NG

OK

>> GO TO 6.

NG

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

6.

CHECK THROTTLE POSITION SENSOR

Refer to

EC-283, "Component Inspection"

.

OK or NG

OK

>> GO TO 12.

NG

>> GO TO 7.

7.

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1.

Replace electric throttle control actuator.

2.

Perform

EC-88, "Throttle Valve Closed Position Learning"

.

3.

Perform

EC-89, "Idle Air Volume Learning"

.

>> INSPECTION END

8.

CHECK APP SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check harness continuity between APP sensor terminals 4 and ECM terminal 82 (sensor 1), APP sensor
terminal 5 and ECM terminal 83 (sensor 2).
Refer to Wiring Diagram.

4.

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

OK or NG

OK

>> GO TO 9.

NG

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

9.

CHECK APP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Check harness continuity between ECM terminal 106 and APP sensor terminal 3, 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

OK

>> GO TO 10.

NG

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

ECM terminal

Sensor terminal

Reference Wiring Diagram

91

APP sensor terminal 1

EC-638

47

Electric throttle control actuator terminal 2

EC-279

Continuity should exist.

Continuity should exist.

EC-656

DTC P2138 APP SENSOR

2005 Pathfinder

10.

CHECK APP SENSOR

Refer to

EC-656, "Component Inspection"

.

OK or NG

OK

>> GO TO 12.

NG

>> GO TO 11.

11.

REPLACE ACCELERATOR PEDAL ASSEMBLY

1.

Replace accelerator pedal assembly.

2.

Perform

EC-88, "Accelerator Pedal Released Position Learning"

.

3.

Perform

EC-88, "Throttle Valve Closed Position Learning"

.

4.

Perform

EC-89, "Idle Air Volume Learning"

.

>> INSPECTION END

12.

CHECK INTERMITTENT INCIDENT

Refer to

EC-158, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

.

>> INSPECTION END

Component Inspection

UBS00KHT

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.

5.

Perform

EC-88, "Accelerator Pedal Released Position Learning"

.

6.

Perform

EC-88, "Throttle Valve Closed Position Learning"

.

7.

Perform

EC-89, "Idle Air Volume Learning"

.

Removal and Installation

UBS00KHU

ACCELERATOR PEDAL

Refer to

ACC-2, "ACCELERATOR CONTROL SYSTEM"

.

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

IGNITION SIGNAL

EC-657

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2005 Pathfinder

IGNITION SIGNAL

PFP:22448

Component Description

UBS00KHV

IGNITION COIL & POWER TRANSISTOR

The ignition signal from the ECM is sent to and amplified by the power transistor. The power transistor turns
ON and OFF the ignition coil primary circuit. This ON/OFF operation induces the proper high voltage in the coil
secondary circuit.

BBIA0561E

EC-658

IGNITION SIGNAL

2005 Pathfinder

Wiring Diagram

UBS00KHW

BBWA1770E