Nissan Murano Z50 (2003 year). Manual

DTC P2127, P2128 APP SENSOR

EC-575

Revision; 2004 April

2003 Murano

DTC P2127, P2128 APP SENSOR

PFP:18002

Component Description

ABS004NL

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 potentiometers which transform the accelerator pedal
position into output voltage, and emit the voltage signal to the ECM.
In addition, these sensors detect the opening and closing speed of
the accelerator pedal and feed the voltage signals to the ECM. The
ECM judges the current opening angle of the accelerator pedal from
these signals and controls the throttle control motor based on these
signals.
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 oper-
ation such as fuel cut.

CONSULT-II Reference Value in Data Monitor Mode

ABS004NM

Specification data are reference values.

*: Accelerator pedal position sensor 2 signal is converted by ECM internally. Thus, it differ from ECM terminal voltage.

On Board Diagnosis Logic

ABS004NN

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 lights up.

PBIB0146E

MONITOR ITEM

CONDITION

SPECIFICATION

ACCEL SEN1
ACCEL SEN2*

●

Ignition switch: ON
(Engine stopped)

Accelerator pedal: Fully released

0.5 - 1.0V

Accelerator pedal: Fully depressed

4.2 - 4.8V

CLSD THL POS

●

Ignition switch: ON
(Engine stopped)

Accelerator pedal: Fully released

Accelerator pedal: Slightly depressed

OFF

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P2127
2127

Accelerator pedal posi-
tion sensor 2 circuit low
input

An excessively low voltage from the APP sen-
sor 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
(APP sensor 2)

●

Electric throttle control actuator
(TP sensor 1 and 2)

P2128
2128

Accelerator pedal posi-
tion sensor 2 circuit high
input

An excessively high voltage from the APP sen-
sor 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.

EC-576

DTC P2127, P2128 APP SENSOR

Revision; 2004 April

2003 Murano

DTC Confirmation Procedure

ABS004NO

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

Turn ignition switch “ON”.

Select “DATA MONITOR” mode with CONSULT-II.

Start engine and let it idle for 1 second.

If DTC is detected, go to

EC-578, "Diagnostic Procedure"

WITH GST

Follow the procedure “With CONSULT-II” above.

SEF058Y

EC-578

DTC P2127, P2128 APP SENSOR

Revision; 2004 April

2003 Murano

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

ABS004NQ

RETIGHTEN GROUND SCREWS

Turn ignition switch “OFF”.

Loosen and retighten engine ground screws.

>> GO TO 2.

TER-

MINAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

Sensors' power supply
(Throttle position sensor)

[Ignition switch “ON”]

Approximately 5V

Sensors' ground
(APP sensor 1)

[Engine is running]

●

Warm-up condition

●

Idle speed

Approximately 0V

Sensors' ground
(APP sensor 2)

[Engine is running]

●

Warm-up condition

●

Idle speed

Approximately 0V

R/W

Sensors' power supply
(APP sensor 1)

[Ignition switch “ON”]

Approximately 5V

Sensors' power supply
(APP sensor 2)

[Ignition switch “ON”]

Approximately 5V

W/R

Accelerator pedal position
sensor 2

[Ignition switch "ON"]

●

Engine stopped

●

Accelerator pedal fully released

0.25 - 0.50V

[Ignition switch "ON"]

●

Engine stopped

●

Accelerator pedal fully depressed

2.0 - 2.5V

106

Accelerator pedal position
sensor 1

[Ignition switch "ON"]

●

Engine stopped

●

Accelerator pedal fully released

0.5 - 1.0V

[Ignition switch "ON"]

●

Engine stopped

●

Accelerator pedal fully depressed

4.2 - 4.8V

PBIB1298E

DTC P2127, P2128 APP SENSOR

EC-579

Revision; 2004 April

2003 Murano

CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-I

Disconnect accelerator pedal position (APP) sensor harness
connector.

Turn ignition switch “ON”.

Check voltage between APP sensor terminal 4 and ground with
CONSULT-II or tester.

OK or NG

>> GO TO 7.

>> GO TO 3.

CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-II

Turn ignition switch “OFF”.

Disconnect ECM harness connector.

Check harness continuity between APP sensor terminal 2 and ECM terminal 91.
Refer to wiring diagram.

OK or NG

>> GO TO 4.

>> Repair or replace open circuit.

CHECK THROTTLE POSITION SENSOR 2 POWER SUPPLY CIRCUIT-III

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

OK or NG

>> GO TO 5.

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

CHECK THROTTLE POSITION SENSOR

Refer to

EC-588, "Component Inspection"

OK or NG

>> GO TO 11.

>> GO TO 6.

PBIB1366E

Voltage: Approximately 5V

PBIB1393E

Continuity should exist.

ECM terminal

Sensor terminal

Reference Wiring Diagram

APP sensor terminal 2

EC-577

Electric throttle control actuator terminal 1

EC-584

EC-580

DTC P2127, P2128 APP SENSOR

Revision; 2004 April

2003 Murano

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

Replace electric throttle control actuator.

Perform

EC-64, "Throttle Valve Closed Position Learning"

Perform

EC-64, "Idle Air Volume Learning"

>> INSPECTION END

CHECK APP SENSOR 2 GROUND CIRCUIT FOR OPEN AND SHORT

Turn ignition switch “OFF”.

Disconnect ECM harness connector.

Check harness continuity between APP sensor terminal 3 and ECM terminal 83.
Refer to Wiring Diagram.

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

OK or NG

>> GO TO 8.

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

CHECK APP SENSOR 2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

Check harness continuity between ECM terminal 98 and APP sensor terminal 6.
Refer to Wiring Diagram.

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

Refer to

EC-581, "Component Inspection"

OK or NG

>> GO TO 11.

>> GO TO 10.

10.

REPLACE ACCELERATOR PEDAL ASSEMBLY

Replace accelerator pedal assembly.

Perform

EC-63, "Accelerator Pedal Released Position Learning"

Perform

EC-64, "Throttle Valve Closed Position Learning"

Perform

EC-64, "Idle Air Volume Learning"

>> INSPECTION END

11.

CHECK INTERMITTENT INCIDENT

Refer to

EC-151, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

>> INSPECTION END

Continuity should exist.

DTC P2127, P2128 APP SENSOR

EC-581

Revision; 2004 April

2003 Murano

Component Inspection

ABS004NR

ACCELERATOR PEDAL POSITION SENSOR

Reconnect all harness connectors disconnected.

Turn ignition switch “ON”.

Check voltage between ECM terminals 106 (APP sensor 1 sig-
nal), 98 (APP sensor 2 signal) and engine ground under the fol-
lowing conditions.

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

Perform

EC-63, "Accelerator Pedal Released Position Learning"

Perform

EC-64, "Throttle Valve Closed Position Learning"

Perform

EC-64, "Idle Air Volume Learning"

Removal and Installation

ABS004NS

ACCELERATOR PEDAL

Refer to

ACC-2, "ACCELERATOR CONTROL SYSTEM"

Terminal

Accelerator pedal

Voltage

106
(Accelerator pedal position
sensor 1)

Fully released

0.5 - 1.0V

Fully depressed

4.2 - 4.8V

98
(Accelerator pedal position
sensor 2)

Fully released

0.25 - 0.50V

Fully depressed

2.0 - 2.5V

MBIB0023E

EC-582

DTC P2135 TP SENSOR

Revision; 2004 April

2003 Murano

DTC P2135 TP SENSOR

PFP:16119

Component Description

ABS004NT

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 potentiometers which transform the throttle valve position
into output voltage, and emit the voltage signal to the ECM. In addi-
tion, these sensors detect the opening and closing speed of the
throttle valve and feed the voltage signals to the ECM. The ECM
judges the current opening angle of the throttle valve from these sig-
nals and the ECM controls the throttle control motor to make the
throttle valve opening angle properly in response to driving condi-
tion.

CONSULT-II Reference Value in Data Monitor Mode

ABS004NU

Specification data are reference values.

*: Throttle position sensor 2 signal is converted by ECM internally. Thus, it differs from ECM terminal voltage signal.

On Board Diagnosis Logic

ABS004NV

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 lights up.

PBIB0145E

MONITOR ITEM

CONDITION

SPECIFICATION

THRTL SEN1
THRTL SEN2*

●

Ignition switch: ON
(Engine stopped)

●

Shift lever: D

Accelerator pedal: Fully released

More than 0.36V

Accelerator pedal: Fully depressed

Less than 4.75V

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P2135
2135

Throttle position sensor
circuit range/perfor-
mance problem

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

DTC P2135 TP SENSOR

EC-583

Revision; 2004 April

2003 Murano

DTC Confirmation Procedure

ABS004NW

WITH CONSULT-II

Turn ignition switch “ON”.

Select “DATA MONITOR” mode with CONSULT-II.

Start engine and let it idle for 1 second.

If DTC is detected, go to

EC-585, "Diagnostic Procedure"

WITH GST

Follow the procedure “WITH CONSULT-II” above.

SEF058Y

DTC P2135 TP SENSOR

EC-585

Revision; 2004 April

2003 Murano

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

ABS004NY

RETIGHTEN GROUND SCREWS

Turn ignition switch “OFF”.

Loosen and retighten engine ground screws.

>> GO TO 2.

TER-

MINAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

Sensors' power supply
(Throttle position sensor)

[Ignition switch “ON”]

Approximately 5V

Throttle position sensor 1

[Ignition switch "ON"]

●

Engine stopped

●

Shift lever: "D"

●

Accelerator pedal fully released

More than 0.36V

[Ignition switch “ON”]

●

Engine stopped

●

Shift lever: "D"

●

Accelerator pedal fully depressed

Less than 4.75V

Sensors' ground
(Throttle position sensor)

[Engine is running]

●

Warm-up condition

●

Idle speed

Approximately 0V

Throttle position sensor 2

[Ignition switch "ON"]

●

Engine stopped

●

Shift lever: "D"

●

Accelerator pedal fully released

Less than 4.75V

[Ignition switch “ON”]

●

Engine stopped

●

Shift lever: "D"

●

Accelerator pedal fully depressed

More than 0.36V

Sensors' power supply
(APP sensor 2)

[Ignition switch “ON”]

Approximately 5V

PBIB1298E

EC-586

DTC P2135 TP SENSOR

Revision; 2004 April

2003 Murano

CHECK THROTTLE POSITION SENSOR POWER SUPPLY CIRCUIT-I

Disconnect electric throttle control actuator harness connector.

Turn ignition switch “ON”.

Check voltage between electric throttle control actuator terminal
1 and ground with CONSULT-II or tester.

OK or NG

>> GO TO 7.

>> GO TO 3.

CHECK THROTTLE POSITION SENSOR POWER SUPPLY CIRCUIT-II

Turn ignition switch “OFF”.

Disconnect ECM harness connector.

Check harness continuity between electric throttle control actuator terminal 1 and ECM terminal 47.
Refer to Wiring Diagram.

OK or NG

>> GO TO 4.

>> Repair or replace open circuit.

CHECK THROTTLE POSITION SENSOR POWER SUPPLY CIRCUIT-III

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

OK or NG

>> GO TO 5.

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

CHECK APP SENSOR

Refer to

EC-581, "Component Inspection"

OK or NG

>> GO TO 11.

>> GO TO 6.

PBIB1355E

Voltage: Approximately 5V

PBIB0082E

Continuity should exist.

ECM terminal

Sensor terminal

Reference Wiring Diagram

Electric throttle control actuator terminal 1

EC-584

APP sensor terminal 2

EC-577

DTC P2135 TP SENSOR

EC-587

Revision; 2004 April

2003 Murano

REPLACE ACCELERATOR PEDAL ASSEMBLY

Replace accelerator pedal assembly.

Perform

EC-63, "Accelerator Pedal Released Position Learning"

Perform

EC-64, "Throttle Valve Closed Position Learning"

Perform

EC-64, "Idle Air Volume Learning"

>> INSPECTION END

CHECK THROTTLE POSITION SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

Turn ignition switch “OFF”.

Disconnect ECM harness connector.

Check harness continuity between electric throttle control actuator terminal 5 and ECM terminal 66.
Refer to Wiring Diagram.

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 THROTTLE POSITION SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

Check harness continuity between ECM terminal 50 and electric throttle control actuator terminal 4, ECM
terminal 69 and electric throttle control actuator terminal 2.
Refer to Wiring Diagram.

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 THROTTLE POSITION SENSOR

Refer to

EC-588, "Component Inspection"

OK or NG

>> GO TO 11.

>> GO TO 10.

10.

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

Replace the electric throttle control actuator.

Perform

EC-64, "Throttle Valve Closed Position Learning"

Perform

EC-64, "Idle Air Volume Learning"

>> INSPECTION END

11.

CHECK INTERMITTENT INCIDENT

Refer to

EC-151, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

>> INSPECTION END

Continuity should exist.

EC-588

DTC P2135 TP SENSOR

Revision; 2004 April

2003 Murano

Component Inspection

ABS004NZ

THROTTLE POSITION SENSOR

Reconnect all harness connectors disconnected.

Perform

EC-64, "Throttle Valve Closed Position Learning"

Turn ignition switch “ON”.

Set selector lever to “D” position.

Check voltage between ECM terminals 50 (TP sensor 1signal),
69 (TP sensor 2signal) and engine ground under the following
conditions.

If NG, replace electric throttle control actuator and go to the next
step.

Perform

EC-64, "Throttle Valve Closed Position Learning"

Perform

EC-64, "Idle Air Volume Learning"

Removal and Installation

ABS004O0

ELECTRIC THROTTLE CONTROL ACTUATOR

Refer to

EM-16, "INTAKE MANIFOLD COLLECTOR"

Terminal

Accelerator pedal

Voltage

50
(Throttle position sensor 1)

Fully released

More than 0.36V

Fully depressed

Less than 4.75V

69
(Throttle position sensor 2)

Fully released

Less than 4.75V

Fully depressed

More than 0.36V

PBIB1392E

DTC P2138 APP SENSOR

EC-589

Revision; 2004 April

2003 Murano

DTC P2138 APP SENSOR

PFP:18002

Component Description

ABS004O1

CONSULT-II Reference Value in Data Monitor Mode

ABS004O2

Specification data are reference values.

*: Accelerator pedal position sensor 2 signal is converted by ECM internally. Thus, it differ from ECM terminal voltage.

On Board Diagnosis Logic

ABS004O3

This self-diagnosis has the one trip detection logic.

NOTE:
If DTC P2138 is displayed with DTC P1229, first perform the trouble diagnosis for DTC P1229. Refer to

EC-512

FAIL-SAFE MODE

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

PBIB0146E

MONITOR ITEM

CONDITION

SPECIFICATION

ACCEL SEN1
ACCEL SEN2*

●

Ignition switch: ON
(Engine stopped)

Accelerator pedal: Fully released

0.5 - 1.0V

Accelerator pedal: Fully depressed

4.2 - 4.8V

CLSD THL POS

●

Ignition switch: ON
(Engine stopped)

Accelerator pedal: Fully released

Accelerator pedal: Slightly depressed

OFF

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P2138
2138

Accelerator pedal posi-
tion sensor circuit
range/performance
problem

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

●

Accelerator pedal position sensor 1 and
2

●

Electric throttle control actuator
(TP sensor 1 and 2)

Engine operating condition in fail-safe mode

EC-590

DTC P2138 APP SENSOR

Revision; 2004 April

2003 Murano

DTC Confirmation Procedure

ABS004O4

WITH CONSULT-II

Turn ignition switch “ON”.

Select “DATA MONITOR” mode with CONSULT-II.

Start engine and let it idle for 1 second.

If DTC is detected, go to

EC-592, "Diagnostic Procedure"

WITH GST

Follow the procedure “WITH CONSULT-II” above.

SEF058Y

Nissan Murano Z50 (2003 year). Manual - part 116