Nissan Rogue. Instruction — part 489
EC-224
< DTC/CIRCUIT DIAGNOSIS >
[QR25DE]
P0127 IAT SENSOR
P0127 IAT SENSOR
DTC Description
INFOID:0000000011277973
DTC DETECTION LOGIC
POSSIBLE CAUSE
• Harness or connectors (Intake air temperature sensor circuit is open or shorted.)
• Intake air temperature sensor
FAIL-SAFE
Not applicable
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure
before conducting 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:
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.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT
1. Wait until engine coolant temperature is less than 96
°C (205°F)
-
Turn ignition switch ON.
-
Select “DATA MONITOR” mode of “ENGINE” using CONSULT.
-
Check the engine coolant temperature.
-
If the engine coolant temperature is not less than 96
°C (205°F), turn ignition switch OFF and cool down
engine.
NOTE:
Perform the following steps before engine coolant temperature is above 96
°C (205°F).
2. Turn ignition switch ON.
3. Select “DATA MONITOR” mode of “ENGINE” using CONSULT
4. Start engine.
5. Hold vehicle speed at more than 70 km/h (43 MPH) for 100 consecutive seconds.
CAUTION:
Always drive vehicle at a safe speed.
6. Check 1st trip DTC.
With GST
Follow the procedure “With CONSULT” above.
Is 1st trip DTC detected?
YES
>> Proceed to
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000011277974
1.
CHECK INTAKE AIR TEMPERATURE SENSOR
Check the intake air temperature sensor. Refer to
EC-225, "Component Inspection"
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
P0127
IAT SENSOR-B1
(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.
P0127 IAT SENSOR
EC-225
< DTC/CIRCUIT DIAGNOSIS >
[QR25DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Replace mass air flow sensor (with intake air temperature sensor). Refer to
.
2.
CHECK INTERMITTENT INCIDENT
GI-44, "Intermittent Incident"
.
>> INSPECTION END
Component Inspection
INFOID:0000000011277975
1.
CHECK INTAKE AIR TEMPERATURE SENSOR
1. Turn ignition switch OFF.
2. Disconnect mass air flow sensor harness connector and reconnect it again.
3. Turn ignition switch ON.
4. Select “DATA MONITOR” mode with CONSULT.
5. Check that “INT/A TEMP SEN” indicates as per following condition.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace mass air flow sensor (with intake air temperature sensor). Refer to
.
Monitor item
Condition
Value
(Approx.)
INT/A TEMP SEN
Temperature [
°C (°F)]
25 (77)
1.9 - 2.1 (V)
EC-226
< DTC/CIRCUIT DIAGNOSIS >
[QR25DE]
P0128 THERMOSTAT FUNCTION
P0128 THERMOSTAT FUNCTION
DTC Description
INFOID:0000000011277976
DTC DETECTION 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 leak in the seal or the thermostat being stuck open.
POSSIBLE CAUSE
• Thermostat
• Leakage from sealing portion of thermostat
• Engine coolant temperature sensor
FAIL-SAFE
Not applicable
DTC CONFIRMATION PROCEDURE
NOTE:
Never refuel before and during the following procedure.
1.
CHECK DTC PRIORITY
If DTC P0128 is displayed with DTC P0300, P0301, P0302, P0303 or P0304, first perform the trouble diagno-
sis for DTC P0300, P0301, P0302, P0303 or P0304.
Is applicable DTC detected?
YES
>> Perform diagnosis of applicable. Refer to
.
NO
>> GO TO 2.
2.
PRECONDITIONING-1
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure
before conducting 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.
>> GO TO 3.
3.
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 4.
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
P0128
THERMSTAT FNCTN
[Coolant thermostat (coolant temperature
below thermostat regulating temperature)]
The engine coolant temperature does not reach to specified temperature
even though the engine has run long enough.
Ambient temperature
−10°C (14°F) or more
A/C switch
OFF
Blower fan switch
OFF
COOLAN TEMP/S
−10°C – 58°C (14 – 136°F)
P0128 THERMOSTAT FUNCTION
EC-227
< DTC/CIRCUIT DIAGNOSIS >
[QR25DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
NO
>> 1. Satisfy the condition.
2. GO TO 4.
4.
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 26
°C (47°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 26
°C (47°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 5.
NO
>> GO TO 2.
5.
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:0000000011277977
1.
CHECK DTC PRIORITY
If DTC P0128 is displayed with DTC P0300, P0301, P0302, P0303 or P0304, first perform the trouble diagno-
sis for DTC P0300, P0301, P0302, P0303 or P0304.
Is applicable DTC detected?
YES
>> Perform diagnosis of applicable. Refer to
.
NO
>> GO TO 2.
COOLAN TEMP/S
66
°C (151°F) or less
FUEL T/TMP SE
Less than the value calculated by sub-
tracting 26
°C (47°F) from “COOLAN
TEMP/S”.*
COOLAN TEMP/S
FUEL T/TMP SE
70
°C (158°F)
44
°C (111°F) or less
65
°C (149°F)
39
°C (102°F) or less
60
°C (140°F)
34
°C (93°F) or less
COOLAN TEMP/S
67
°C (153°F) or more
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