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Nissan Frontier. Manual - part 406

P0128 THERMOSTAT FUNCTION

EC-195

< DTC/CIRCUIT DIAGNOSIS >

[QR25DE]

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

>> GO TO 2.

PRECONDITIONING-2

With CONSULT

1. Turn ignition switch ON.

2. Check the following conditions:

3. Select “DATA MONITOR” mode of “ENGINE” using CONSULT.

4. Check the following conditions:

Is the condition satisfied?

YES

>> GO TO 3.

>> 1. Satisfy the condition.

2. GO TO 3.

PERFORM DTC CONFIRMATION PROCEDURE-1

With CONSULT

1. Start engine.

2. Drive the vehicle until the following condition is satisfied.

CAUTION:

Always drive vehicle at safe speed.

STEP 1

Drive the vehicle under the conditions instructed below until the difference between “COOLAN TEMP/S” and

“FUEL T/TMP SE” becomes at least 23

°C (73°F).

*: Example

STEP 2

Drive the vehicle at 50 km/h (32 MPH) or more with the difference between “COOLAN TEMP/S” and “FUEL

T/TMP SE” maintained at 23

°C (73°F) or more.

NOTE:

Keep the accelerator pedal as steady as possible during cruising.

STEP 3

Drive the vehicle at 50 km/h (32 MPH) or more until “COOLAN TEMP/S” increases by 6

°C (11°F).

NOTE:

Keep the accelerator pedal as steady as possible during cruising.

Is the condition satisfied?

YES

>> GO TO 4.

>> GO TO 1.

Ambient temperature

−10°C (14°F) or more

A/C switch

OFF

Blower fan switch

OFF

COOLAN TEMP/S

−10°C – 49°C (14 – 120°F)

COOLAN TEMP/S

°C (154°F) or less

FUEL T/TMP SE

Less than the value calculated by sub-
tracting 23

°C (73°F) from “COOLAN

TEMP/S”.*

COOLAN TEMP/S

FUEL T/TMP SE

°C (158°F)

°C (116°F) or less

°C (149°F)

°C (107°F) or less

°C (140°F)

°C (98°F) or less

EC-196

< DTC/CIRCUIT DIAGNOSIS >

[QR25DE]

P0128 THERMOSTAT FUNCTION

PERFORM DTC CONFIRMATION PROCEDURE-2

With CONSULT

1. Drive the vehicle until the following condition is satisfied.

CAUTION:

Always drive vehicle at safe speed.

2. Check 1st trip DTC.
Is 1st trip DTC detected?

YES

>> Proceed to

EC-196, "Diagnosis Procedure"

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009480850

CHECK ENGINE COOLANT TEMPERATURE SENSOR

Refer to

EC-196, "Component Inspection"

OK or NG

>> GO TO 2.

>> Replace engine coolant temperature sensor. Refer to

CO-23, "Exploded View"

CHECK THERMOSTAT

Refer to

CO-23, "Removal and Installation Thermostat"

OK or NG

>> INSPECTION END

>> Replace thermostat. Refer to

CO-23, "Removal and Installation Thermostat"

Component Inspection

INFOID:0000000009480851

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.

COOLAN TEMP/S

°C (154°F) or more

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

P0130 A/F SENSOR 1

EC-197

< DTC/CIRCUIT DIAGNOSIS >

[QR25DE]

P0130 A/F SENSOR 1

Component Description

INFOID:0000000009480852

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 about 800

°C

(1,472

°F).

On Board Diagnosis Logic

INFOID:0000000009480853

To judge malfunctions, 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

INFOID:0000000009480854

Perform PROCEDURE FOR MALFUNCTION A first.

If the DTC cannot be confirmed, perform PROCEDURE FOR MALFUNCTION B.

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.

PROCEDURE FOR MALFUNCTION A

With CONSULT

1. Start engine and warm it up to normal operating temperature.

2. Let engine idle for 2 minutes.

3. Check 1st trip DTC.

4. If 1st trip DTC is detected, go to

EC-198, "Diagnosis Procedure"

With GST

PBIB3353E

JPBIA5446GB

DTC

No.

Trouble diagnosis name

DTC detecting condition

Possible Cause

P0130
0130

Air fuel ratio (A/F) sensor 1 circuit

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

• Harness or connectors

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

• Air fuel ratio (A/F) sensor 1

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

EC-198

< DTC/CIRCUIT DIAGNOSIS >

[QR25DE]

P0130 A/F SENSOR 1

Follow the procedure “With CONSULT” above.

PROCEDURE FOR MALFUNCTION B

CAUTION:

Always drive vehicle at a safe speed.

With CONSULT

1. Start engine and warm it up to normal operating temperature.

2. Select “A/F SEN1 (B1)” in “DATA MONITOR” mode with CONSULT.

3. Check “A/F SEN1 (B1)” indication.

If the indication is constantly approx. 2.2V and does not fluctuates, go to

EC-198, "Diagnosis Procedure"

If the indication fluctuates around 2.2V, go to next step.

4. Select “A/F SEN1 (B1) P1276” of “A/F SEN1” in “DTC WORK SUPPORT” mode with CONSULT.

5. Touch “START”.

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

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

7. Release accelerator pedal fully.

NOTE:

Never apply brake when 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-198, "Diagnosis Procedure"

Overall Function Check

INFOID:0000000009480855

Use this procedure to check the overall function of the A/F sensor 1 circuit. During this check, a 1st trip DTC

might not be confirmed.

PROCEDURE FOR MALFUNCTION B

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 with OD “OFF” (A/T) or 4th position (M/T), then release the accelerator pedal fully until the

vehicle speed decreases to 50 km/h (30 MPH).

NOTE:

Never apply brake when releasing the accelerator pedal.

4. Repeat steps 2 and 3 for 5 times.

5. Stop the vehicle and turn ignition switch OFF.

6. Wait at least 10 seconds and restart engine.

7. Repeat steps 2 and 3 for 5 times.

8. Stop the vehicle and connect GST to the vehicle.

9. Make sure that no 1st trip DTC is displayed.

If the 1st trip DTC is displayed, go to

EC-198, "Diagnosis Procedure"

Diagnosis Procedure

INFOID:0000000009480856

CHECK GROUND CONNECTIONS

1. Turn ignition switch OFF.

ENG SPEED

1,350 - 3,200 rpm

Vehicle speed

More than 64 km/h (40 MPH)

B/FUEL SCHDL

1.0 - 8.0 msec

Shift lever

D position with OD “OFF” (A/T)
4th position (M/T)

Content .. 404 405 406 407 ..