Nissan Murano Z51. Manual - part 543

EC-180

< DTC/CIRCUIT DIAGNOSIS >

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P0128 THERMOSTAT FUNCTION

P0128 THERMOSTAT FUNCTION

DTC Logic

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DTC DETECTION LOGIC

NOTE:
If DTC P0128 is displayed with DTC P0300, P0301, P0302, P0303, P0304, P0305 or P0306, first perform
the trouble diagnosis for DTC P0300, P0301, P0302, P0303, P0304, P0305, P0306. Refer to 

EC-245,

"DTC Logic"

.

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

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing 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:
• 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 56

°

C (133

°

F).

• Before performing the following procedure, do not add fuel.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT-III

1.

Turn A/C switch OFF.

2.

Turn blower fan switch OFF.

3.

Turn ignition switch ON.

4.

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

5.

Check the indication of “COOLAN TEMP/S”
If it is below 56

°

C (133

°

F), go to next step.

If it is above 56

°

C (133

°

F), cool down the engine to less than 56

°

C (133

°

F). Then go to next steps.

6.

Start engine.

7.

Drive vehicle for 10 consecutive minutes under the following conditions.

CAUTION:

Always drive vehicle at a safe speed.
NOTE:
If “COOLAN TEMP/S” increases to more than 75

°

C (167

°

F) within 10 minutes, turn ignition switch

OFF because the test result will be OK.

8.

Check 1st trip DTC.

With GST

Follow the procedure “With CONSULT-III” above.
Is 1st trip DTC detected?

YES

>> Go to 

EC-181, "Diagnosis Procedure"

.

NO

>> INSPECTION END

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0128

Thermostat function

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

• Thermostat
• Leakage from sealing portion of thermo-

stat

• Engine coolant temperature sensor

VHCL SPEED SE

More than 56 km/h (35 MPH)

P0128 THERMOSTAT FUNCTION

EC-181

< DTC/CIRCUIT DIAGNOSIS >

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Diagnosis Procedure

INFOID:0000000005536592

1.

CHECK ENGINE COOLANT TEMPERATURE SENSOR

Refer to 

EC-181, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace engine coolant temperature sensor.

2.

CHECK THERMOSTAT

Check thermostat. Refer to 

CO-26, "Exploded View"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace thermostat.

Component Inspection

INFOID:0000000005536593

1.

CHECK ENGINE COOLANT TEMPERATURE SENSOR

1.

Turn ignition switch OFF.

2.

Disconnect engine coolant temperature sensor harness connector.

3.

Remove engine coolant temperature sensor.

4.

Check resistance between engine coolant temperature sensor
terminals as per the following.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace engine coolant temperature sensor.

Terminals

Condition

Resistance (k

Ω

)

1 and 2

Temperature [

°

C (

°

F)]

20 (68)

2.1 - 2.9

50 (122)

0.68 - 1.00

90 (194)

0.236 - 0.260

JMBIA0080ZZ

EC-182

< DTC/CIRCUIT DIAGNOSIS >

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P0130, P0150 A/F SENSOR 1

P0130, P0150 A/F SENSOR 1

Description

INFOID:0000000005536594

The air fuel ratio (A/F) sensor 1 is a planar one-cell limit current sen-
sor. The sensor element of the A/F sensor 1 is composed an elec-
trode layer, 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.
The exhaust gas components diffuse through the diffusion layer at
the sensor cell. An electrode layer is applied voltage, and this current
relative oxygen density in lean. Also this current relative hydrocar-
bon density in rich.

Therefore, the A/F sensor 1 is able to indicate air fuel ratio by this
electrode layer of current. In addition, a heater is integrated in the
sensor to ensure the required operating temperature of approxi-
mately 800

°

C (1,472

°

F).

DTC Logic

INFOID:0000000005536595

DTC DETECTION LOGIC

To judge malfunctions, the diagnosis checks that the A/F signal computed by ECM from the A/F sensor 1 sig-
nal fluctuates according to fuel feedback control.

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing 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 11 V at idle.

>> GO TO 2.

JMBIA0112GB

PBIB3354E

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0130

Air fuel ratio (A/F) sensor 1 
(bank 1) circuit

A)

The A/F signal computed by ECM from the A/F 
sensor 1 signal is constantly in a range other 
than approx. 2.2 V.

• Harness or connectors

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

• A/F sensor 1

B)

The A/F signal computed by ECM from the A/F 
sensor 1 signal is constantly approx. 2.2 V.

P0150

Air fuel ratio (A/F) sensor 1 
(bank 2) circuit

A)

The A/F signal computed by ECM from the A/F 
sensor 1 signal is constantly in a range other 
than approx. 2.2 V.

• Harness or connectors

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

• A/F sensor 1

B)

The A/F signal computed by ECM from the A/F 
sensor 1 signal is constantly approx. 2.2 V.

P0130, P0150 A/F SENSOR 1

EC-183

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2.

PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION A

1.

Start engine and warm it up to normal operating temperature.

2.

Let engine idle for 2 minutes.

3.

Check 1st trip DTC.

Is 1st trip DTC detected?

YES

>> Go to 

EC-184, "Diagnosis Procedure"

.

NO-1

>> With CONSULT-III: GO TO 3.

NO-2

>> With GST: GO TO 7.

3.

CHECK AIR FUEL RATIO (A/F) SENSOR 1 FUNCTION

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-III.

3.

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

Does the indication fluctuate around 2.2 V?

YES

>> GO TO 4.

NO

>> Go to 

EC-184, "Diagnosis Procedure"

.

4.

PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION B-I

1.

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-III.

2.

Touch “START”.

3.

When the following conditions are met, “TESTING” will be displayed on the CONSULT-III screen.

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

CAUTION:

Always drive vehicle at a safe speed.

Is “TESTING” displayed on CONSULT-III screen?

YES

>> GO TO 5.

NO

>> Check A/F sensor 1 function again. GO TO 3.

5.

PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION B-II

Release accelerator pedal fully.
NOTE:
Never apply brake when releasing the accelerator pedal.

Which does “TESTING” change to?

COMPLETED>>GO TO 6.
OUT OF CONDITION>>Retry DTC CONFIRMATION PROCEDURE. GO TO 4.

6.

PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION B-III

Touch “SELF-DIAG RESULT”.
Which is displayed on CONSULT-III screen?

OK

>> INSPECTION END

NG

>> Go to 

EC-184, "Diagnosis Procedure"

.

7.

PERFORM COMPONENT FUNCTION CHECK FOR MALFUNCTION B

Perform component function check. Refer to 

EC-184, "Component Function Check"

.

NOTE:
Use component function check to check the overall function of the A/F sensor 1 circuit. During this check, a
1st trip DTC might not be confirmed.

Is the inspection result normal?

YES

>> INSPECTION END

ENG SPEED

1,000 - 3,200 rpm

VHCL SPEED SE

More than 64 km/h (40 mph)

B/FUEL SCHDL

1.0 - 8.0 msec

Selector lever

D position