Nissan Frontier. Manual — part 406
P0128 THERMOSTAT FUNCTION
EC-195
< DTC/CIRCUIT DIAGNOSIS >
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2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
>> GO TO 2.
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.
NO
>> 1. Satisfy the condition.
2. GO TO 3.
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.
NO
>> 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
68
°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
70
°C (158°F)
47
°C (116°F) or less
65
°C (149°F)
42
°C (107°F) or less
60
°C (140°F)
37
°C (98°F) or less
EC-196
< DTC/CIRCUIT DIAGNOSIS >
[QR25DE]
P0128 THERMOSTAT FUNCTION
4.
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
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009480850
1.
CHECK ENGINE COOLANT TEMPERATURE SENSOR
EC-196, "Component Inspection"
OK or NG
OK
>> GO TO 2.
NG
>> Replace engine coolant temperature sensor. Refer to
2.
CHECK THERMOSTAT
CO-23, "Removal and Installation Thermostat"
OK or NG
OK
>> INSPECTION END
NG
>> 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
68
°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
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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
With GST
PBIB3353E
JPBIA5446GB
DTC
No.
Trouble diagnosis name
DTC detecting condition
Possible Cause
P0130
0130
Air fuel ratio (A/F) sensor 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. 2.2V.
• Harness or connectors
(A/F sensor 1 circuit is open or
shorted.)
• Air fuel ratio (A/F) sensor 1
B)
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
.
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
.
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
.
Diagnosis Procedure
INFOID:0000000009480856
1.
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)
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