Nissan Murano Z50 (2006 year). Manual - part 90

DTC P0122, P0123 TP SENSOR

EC-219

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6. 

REPLACE ACCELERATOR PEDAL ASSEMBLY

1.

Replace accelerator pedal assembly.

2.

Perform 

EC-75, "Accelerator Pedal Released Position Learning"

 .

3.

Perform 

EC-76, "Throttle Valve Closed Position Learning"

 .

4.

Perform 

EC-76, "Idle Air Volume Learning"

 .

>> INSPECTION END

7. 

CHECK THROTTLE POSITION SENSOR 2 GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

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

4.

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

OK or NG

OK

>> GO TO 8.

NG

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

8. 

CHECK THROTTLE POSITION SENSOR 2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

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

2.

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 THROTTLE POSITION SENSOR

Refer to 

EC-220, "Component Inspection"

 .

OK or NG

OK

>> GO TO 11.

NG

>> GO TO 10.

10. 

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1.

Replace the electric throttle control actuator.

2.

Perform 

EC-76, "Throttle Valve Closed Position Learning"

 .

3.

Perform 

EC-76, "Idle Air Volume Learning"

 .

>> INSPECTION END

11. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-142, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END

Continuity should exist.

Continuity should exist.

EC-220

DTC P0122, P0123 TP SENSOR

Revision: 2006 August

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Component Inspection

NBS0031L

THROTTLE POSITION SENSOR

1.

Reconnect all harness connectors disconnected.

2.

Perform 

EC-76, "Throttle Valve Closed Position Learning"

 .

3.

Turn ignition switch ON.

4.

Set shift lever to D position. 

5.

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

6.

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

7.

Perform 

EC-76, "Throttle Valve Closed Position Learning"

 .

8.

Perform 

EC-76, "Idle Air Volume Learning"

 .

Removal and Installation

NBS0031M

ELECTRIC THROTTLE CONTROL ACTUATOR

Refer to 

EM-18, "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 P0125 ECT SENSOR

EC-221

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DTC P0125 ECT SENSOR

PFP:22630

Component Description

NBS0031N

NOTE:
If DTC P0125 is displayed with P0117 or P0118, first perform the trouble diagnosis for DTC P0117 or
P0118. Refer to 

EC-209

 .

The engine coolant temperature sensor is used to detect the engine
coolant temperature. The sensor modifies a voltage signal from the
ECM. The modified signal returns to the ECM as the engine coolant
temperature input. The sensor uses a thermistor which is sensitive to
the change in temperature. The electrical resistance of the ther-
mistor decreases as temperature increases.

<Reference data>

*: This data is reference value and is measured between ECM terminal 73 (Engine
coolant temperature sensor) 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.

On Board Diagnosis Logic

NBS0031O

SEF594K

Engine coolant 

temperature

°

C (

°

F)

Voltage*

V

Resistance

k

Ω

−

10 (14)

4.4

7.0 - 11.4

20 (68)

3.5

2.1 - 2.9

50 (122)

2.2

0.68 - 1.00

90 (194)

0.9

0.236 - 0.260

SEF012P

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0125
0125

Insufficient engine cool-
ant temperature for 
closed loop fuel control

●

Voltage sent to ECM from the sensor is not 
practical, even when some time has passed 
after starting the engine.

●

Engine coolant temperature is insufficient for 
closed loop fuel control.

●

Harness or connectors
(High resistance in the circuit)

●

Engine coolant temperature sensor

●

Thermostat

EC-222

DTC P0125 ECT SENSOR

Revision: 2006 August

2006 Murano

DTC Confirmation Procedure

NBS0031P

CAUTION:

Be careful not to overheat engine.
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.

 WITH CONSULT-II

1.

Turn ignition switch ON.

2.

Select “DATA MONITOR” mode with CONSULT-II.

3.

Check that “COOLAN TEMP/S” is above 10

°

C (50

°

F).

If it is above 10

°

C (50

°

F), the test result will be OK.

If it is below 10

°

C (50

°

F), go to following step.

4.

Start engine and run it for 65 minutes at idle speed.
If “COOLAN TEMP/S” increases to more than 10

°

C (50

°

F)

within 65 minutes, stop engine because the test result will
be OK.

5.

If 1st trip DTC is detected, go to 

EC-222, "Diagnostic Procedure"

.

 WITH GST

Follow the procedure “WITH CONSULT-II” above.

Diagnostic Procedure

NBS0031Q

1. 

CHECK GROUND CONNECTIONS

1.

Turn ignition switch OFF.

2.

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

EC-151, "Ground Inspection"

 .

OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace ground connections.

2. 

CHECK ENGINE COOLANT TEMPERATURE SENSOR

Refer to 

EC-223, "Component Inspection"

 .

OK or NG

OK

>> GO TO 3.

NG

>> Replace engine coolant temperature sensor.

SEF174Y

PBIB1835E

DTC P0125 ECT SENSOR

EC-223

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3. 

CHECK THERMOSTAT OPERATION

When the engine is cold [lower than 70

°

C (158

°

F)] condition, grasp lower radiator hose and confirm the engine

coolant does not flow.

OK or NG

OK

>> GO TO 4.

NG

>> Repair or replace thermostat. Refer to 

CO-27, "WATER INLET AND THERMOSTAT ASSEMBLY"

.

4. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-142, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

For circuit, refer to 

EC-211, "Wiring Diagram"

 .

>> INSPECTION END

Component Inspection

NBS0031R

ENGINE COOLANT TEMPERATURE SENSOR

1.

Check resistance between engine coolant temperature sensor
terminals 1 and 2 as shown in the figure.

<Reference data>

2.

If NG, replace engine coolant temperature sensor.

Removal and Installation

NBS0031S

ENGINE COOLANT TEMPERATURE SENSOR

Refer to 

CO-27, "WATER INLET AND THERMOSTAT ASSEMBLY"

 .

PBIB2005E

Engine coolant temperature

°

C (

°

F)

Resistance

k

Ω

20 (68)

2.1 - 2.9

50 (122)

0.68 - 1.00

90 (194)

0.236 - 0.260

SEF012P

EC-224

DTC P0127 IAT SENSOR

Revision: 2006 August

2006 Murano

DTC P0127 IAT SENSOR

PFP:22630

Component Description

NBS0031T

The intake air temperature sensor is built into mass air flow sensor.
The sensor detects intake air temperature and transmits a signal to
the ECM.
The temperature sensing unit uses a thermistor which is sensitive to
the change in temperature. Electrical resistance of the thermistor
decreases in response to the temperature rise.

<Reference data>

*: This data is reference value and is measured between ECM terminal 34 (Intake air
temperature sensor) and ground.

CAUTION:

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

On Board Diagnosis Logic

NBS0031U

DTC Confirmation Procedure

NBS0031V

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.

CAUTION:

Always drive vehicle at a safe speed.
TESTING CONDITION:
This test may be conducted with the drive wheels lifted in the shop or by driving the vehicle. If a road
test is expected to be easier, it is unnecessary to lift the vehicle.

 WITH CONSULT-II

1.

Wait until engine coolant temperature is less than 90

°

C (194

°

F)

a.

Turn ignition switch ON.

PBIB1604E

Intake air temperature

°

C (

°

F)

Voltage*

V

Resistance

k

Ω

25 (77)

3.3

1.800 - 2.200

80 (176)

1.2

0.283 - 0.359

SEF012P

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0127
0127

Intake air temperature 
too high

Rationally incorrect voltage from the sensor is 
sent to ECM, compared with the voltage signal 
from engine coolant temperature sensor.

●

Harness or connectors
(The sensor circuit is open or shorted)

●

Intake air temperature sensor

DTC P0127 IAT SENSOR

EC-225

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b.

Select “DATA MONITOR” mode with CONSULT-II.

c.

Check the engine coolant temperature.

d.

If the engine coolant temperature is not less than 90

°

C (194

°

F),

turn ignition switch OFF and cool down engine.

●

Perform the following steps before engine coolant tempera-
ture is above 90

°

C (194

°

F).

2.

Turn ignition switch ON.

3.

Select “DATA MONITOR” mode with CONSULT-II.

4.

Start engine.

5.

Hold vehicle speed at more than 70 km/h (43 MPH) for 100 con-
secutive seconds.

6.

If 1st trip DTC is detected, go to 

EC-225, "Diagnostic Procedure"

  .

 WITH GST

Follow the procedure “WITH CONSULT-II” above.

Diagnostic Procedure

NBS0031W

1. 

CHECK GROUND CONNECTIONS

1.

Turn ignition switch OFF.

2.

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

EC-151, "Ground Inspection"

 .

OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace ground connections.

2. 

CHECK INTAKE AIR TEMPERATURE SENSOR

Refer to 

EC-208, "Component Inspection"

  .

OK or NG

OK

>> GO TO 3.

NG

>> Replace mass air flow sensor (with intake air temperature sensor).

3. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-142, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

  .

Refer to 

EC-206, "Wiring Diagram"

  .

>> INSPECTION END

SEF189Y

PBIB1835E

EC-226

DTC P0127 IAT SENSOR

Revision: 2006 August

2006 Murano

Component Inspection

NBS0031X

INTAKE AIR TEMPERATURE SENSOR

1.

Check resistance between intake air temperature sensor termi-
nals 5 and 6 under the following conditions.

2.

If NG, replace mass air flow sensor (with intake air temperature
sensor).

Removal and Installation

NBS0031Y

MASS AIR FLOW SENSOR

Refer to 

EM-16, "AIR CLEANER AND AIR DUCT"

  .

Intake air temperature 

°

C (

°

F)

Resistance k

Ω

25 (77)

1.800 - 2.200

PBIB1604E

SEF012P

DTC P0128 THERMOSTAT FUNCTION

EC-227

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DTC P0128 THERMOSTAT FUNCTION

PFP:21200

On Board Diagnosis Logic

NBS0031Z

Engine coolant temperature has not risen enough to open the thermostat even though the engine has run long
enough.
This is due to a leak in the seal or the thermostat stuck open.

DTC Confirmation Procedure

NBS00320

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:

●

For best results, perform at ambient temperature of –10

°

C (14

°

F) or higher.

●

For best results, perform at engine coolant temperature of –10

°

C (14

°

F) to 60

°

C (140

°

F).

 WITH CONSULT-II

1.

Replace thermostat with new one. Refer to 

CO-27, "WATER INLET AND THERMOSTAT ASSEMBLY"

 .

Use only a genuine NISSAN thermostat as a replacement. If an incorrect thermostat is used, the MIL may
come on.

2.

Turn ignition switch ON.

3.

Select “COOLAN TEMP/S” in “DATA MONITOR” mode with
CONSULT-II.

4.

Check that the “COOLAN TEMP/S” is above 60

°

C (140

°

F).

If it is below 60

°

C (140

°

F), go to following step.

If it is above 60

°

C (140

°

F), cool down the engine to less than

60

°

C (140

°

F), then retry from step 1.

5.

Drive vehicle for 10 consecutive minutes under the following
conditions.

If 1st trip DTC is detected, go to 

EC-227, "Diagnostic Procedure"

.

 WITH GST

Follow the procedure “WITH CONSULT-II” above.

Diagnostic Procedure

NBS00321

1. 

CHECK ENGINE COOLANT TEMPERATURE SENSOR

Refer to 

EC-228, "Component Inspection"

  .

OK or NG

OK

>> INSPECTION END

NG

>> Replace engine coolant temperature sensor.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0128
0128

Thermostat function

The engine coolant temperature does not 
reach to specified temperature even though 
the engine has run long enough.

●

Thermostat

●

Leakage from sealing portion of thermo-
stat

●

Engine coolant temperature sensor

VHCL SPEED SE

80 - 120 km/h (50 - 75 MPH)

SEF176Y

EC-228

DTC P0128 THERMOSTAT FUNCTION

Revision: 2006 August

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Component Inspection

NBS00322

ENGINE COOLANT TEMPERATURE SENSOR

1.

Check resistance between engine coolant temperature sensor
terminals 1 and 2 as shown in the figure.

<Reference data>

2.

If NG, replace engine coolant temperature sensor.

Removal and Installation

NBS00323

ENGINE COOLANT TEMPERATURE SENSOR

Refer to 

CO-27, "WATER INLET AND THERMOSTAT ASSEMBLY"

 .

PBIB2005E

Temperature 

°

C (

°

F)

Resistance k

Ω

20 (68)

2.1 - 2.9

50 (122)

0.68 - 1.0

90 (194)

0.236 - 0.260

SEF012P

DTC P0130, P0150 A/F SENSOR 1

EC-229

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DTC P0130, P0150 A/F SENSOR 1

PFP:22693

Component Description

NBS003A4

The A/F sensor is a planar dual-cell limit current sensor. The sensor
element of the A/F sensor is the combination of a Nernst concentra-
tion cell (sensor cell) with an oxygen-pump cell, which transports
ions. It has a heater in the element.
The sensor is capable of precise measurement   = 1, but also in the
lean and rich range. Together with its control electronics, the sensor
outputs a clear, continuous signal throughout a wide   range (0.7 <

 < air).

The exhaust gas components diffuse through the diffusion gap at the
electrode of the oxygen pump and Nernst concentration cell, where
they are brought to thermodynamic balance.

An electronic circuit controls the pump current through the oxygen-
pump cell so that the composition of the exhaust gas in the diffusion
gap remains constant at   = 1. Therefore, the A/F sensor is able to
indicate air/fuel ratio by this pumping of current. In addition, a heater
is integrated in the sensor to ensure the required operating tempera-
ture of 700 - 800

°

C (1,292 - 1,472

°

F).

CONSULT-II Reference Value in Data Monitor Mode

NBS003A5

Specification data are reference values.

On Board Diagnosis Logic

NBS003A6

To judge the malfunction, the diagnosis checks that the A/F signal computed by ECM from the air fuel ratio (A/
F) sensor 1 signal fluctuates according to fuel feedback control.

DTC Confirmation Procedure

NBS003A7

CAUTION:

Always drive vehicle at a safe speed.

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 11V at idle.

 WITH CONSULT-II

1.

Start engine and warm it up to normal operating temperature.

2.

Select “A/F SEN1 (B1)” or “A/F SEN1 (B2)” in “DATA MONITOR” mode with CONSULT-II.

3.

Check “A/F SEN1 (B1)” or “A/F SEN1 (B2)” indication.

SEF579Z

SEF580Z

MONITOR ITEM

CONDITION

SPECIFICATION

A/F SEN1 (B1)
A/F SEN1 (B2)

●

Engine: After warming up

Maintaining engine speed at 
2,000 rpm

Fluctuates around 1.5V

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible Cause

P0130
0130
(Bank 1)

Air fuel ratio (A/F) sensor 1 
circuit

●

The A/F signal computed by ECM from the A/
F sensor 1 signal is constantly approx. 1.5V.

●

Harness or connectors
(The A/F sensor 1 circuit is open or 
shorted.)

●

Air fuel ratio (A/F) sensor 1

P0150
0150
(Bank 2)

EC-230

DTC P0130, P0150 A/F SENSOR 1

Revision: 2006 August

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If the indication is constantly approx. 1.5V and does not fluctuates, go to 

EC-235, "Diagnostic Procedure"

 .

If the indication fluctuates around 1.5V, go to next step.

4.

Select “A/F SEN1 (B1) P1276” (for DTC P0130) or “A/F SEN1 (B2) P1286” (for DTC P0150) of “A/F
SEN1” in “DTC WORK SUPPORT” mode with CONSULT-II.

5.

Touch “START”.

6.

When the following conditions are met, “TESTING” will be dis-
played on the CONSULT-II screen.

If “TESTING” is not displayed after 20 seconds, retry from
step 2.

7.

Release accelerator pedal fully.

NOTE:
Never apply brake during releasing the accelerator pedal.

8.

Make sure that “TESTING” changes to “COMPLETED”.
If “TESTING” changed to “OUT OF CONDITION”, retry from
step 6.

9.

Make sure that “OK” is displayed after touching “SELF-DIAG
RESULT”.
If “NG” is displayed, go to 

EC-235, "Diagnostic Procedure"

 .

Overall Function Check

NBS003A8

Use this procedure to check the overall function of the A/F sensor 1 circuit.

 WITH GST

1.

Start engine and warm it up to normal operating temperature.

2.

Drive the vehicle at a speed of 80 km/h (50 MPH) for a few minutes in the suitable gear position.

3.

Set D position, then release the accelerator pedal fully until the vehicle speed decreases to 50 km/h (30
MPH).
NOTE:
Never apply brake during releasing the accelerator pedal.

4.

Repeat steps 2 to 3 for five times.

5.

Stop the vehicle and turn ignition switch OFF.

6.

Wait at least 10 seconds and restart engine.

7.

Repeat steps 2 to 3 for five times.

8.

Stop the vehicle and connect GST to the vehicle.

ENG SPEED

1,000 - 3,200 rpm

VHCL SPEED SE

More than 64 km/h (25 MPH)

B/FUEL SCHDL

1.0 - 8.0 msec

Shift lever

D position

SEF576Z

SEF577Z

SEF578Z

DTC P0130, P0150 A/F SENSOR 1

EC-231

C

D

E

F

G

H

I

J

K

L

M

A

EC

Revision: 2006 August

2006 Murano

9.

Make sure that no DTC is displayed.
If the DTC is displayed, go to 

EC-235, "Diagnostic Procedure"

 .

EC-232

DTC P0130, P0150 A/F SENSOR 1

Revision: 2006 August

2006 Murano

Wiring Diagram

NBS003A9

BANK 1

TBWA0692E

DTC P0130, P0150 A/F SENSOR 1

EC-233

C

D

E

F

G

H

I

J

K

L

M

A

EC

Revision: 2006 August

2006 Murano

Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.

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.

: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)

TERMI-

NAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

2

G/B

A/F sensor 1 heater
(bank 1)

[Engine is running]

●

Warm-up condition

●

Idle speed

Approximately 5V

16

LG/B

A/F sensor 1 (Bank 1)

[Engine is running]

●

Warm-up condition

●

Idle speed

Approximately 3.1V

35

O/L

Approximately 2.6V

56

BR/Y

Approximately 2.3V

75

Y/R

Approximately 2.3V

PBIB1584E

EC-234

DTC P0130, P0150 A/F SENSOR 1

Revision: 2006 August

2006 Murano

BANK 2

TBWA0693E