Nissan Versa Note. Manual — part 306
EC-206
< DTC/CIRCUIT DIAGNOSIS >
[HR16DE]
P0127 IAT SENSOR
Component Inspection
INFOID:0000000009020724
1.
CHECK INTAKE AIR TEMPERATURE SENSOR
1. Turn ignition switch OFF.
2. Disconnect mass air flow sensor harness connector.
3. Check resistance between mass air flow sensor terminals as per the following.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace mass air flow sensor (with intake air temperature sensor). Refer to
Mass air flow sensor
Condition
Resistance (k
Ω)
Terminals
5
6
Temperature [
°C (°F)]
25 (77)
1.800 - 2.200
P0128 THERMOSTAT FUNCTION
EC-207
< DTC/CIRCUIT DIAGNOSIS >
[HR16DE]
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P0128 THERMOSTAT FUNCTION
DTC Logic
INFOID:0000000009020725
DTC DETECTION LOGIC
NOTE:
If DTC P0128 is displayed with DTC P0300, P0301, P0302, P0303 or P0304, first perform the trouble
diagnosis for P0300, P0301, P0302, P0303, P0304. Refer to
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.
DTC CONFIRMATION PROCEDURE
NOTE:
Never refuel before and during the following procedure.
1.
PRECONDITIONING-I
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 2.
2.
PRECONDITIONING-II
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-I
With CONSULT
1. Start engine.
2. Drive the vehicle until the following condition is satisfied.
CAUTION:
Always drive vehicle at safe speed.
-
STEP 1
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
Possible cause
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.
• Thermostat
• Leakage from sealing portion of
thermostat
• Engine coolant temperature sensor
Ambient temperature
−10°C (14°F) or more
A/C switch
OFF
Blower fan switch
OFF
COOLAN TEMP/S
−10°C – 52°C (14 – 126°F) (M/T)
−10°C – 46°C (14 – 115°F) (CVT)
EC-208
< DTC/CIRCUIT DIAGNOSIS >
[HR16DE]
P0128 THERMOSTAT FUNCTION
Drive the vehicle under the conditions instructed below until the difference between “COOLAN TEMP/S” and
“FUEL T/TMP SE” becomes at least 25
°C (45°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 (41°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.
4.
PERFORM DTC CONFIRMATION PROCEDURE-II
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:0000000009020726
1.
CHECK ENGINE COOLANT TEMPERATURE SENSOR
Check the engine coolant temperature sensor. Refer to
EC-209, "Component Inspection"
.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Replace engine coolant temperature sensor. Refer to
2.
CHECK THERMOSTAT
Check the thermostat. Refer to
CO-21, "Removal and Installation"
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace thermostat. Refer to
CO-21, "Removal and Installation"
COOLAN TEMP/S
71
°C (160°F) or less (M/T)
65
°C (149°F) or less (CVT)
FUEL T/TMP SE
Less than the value calculated by subtracting
25
°C (45°F) from “COOLAN TEMP/S”.*
COOLAN TEMP/S
FUEL T/TMP SE
70
°C (158°F)
47
°C (117°F) or less
65
°C (149°F)
42
°C (108°F) or less
60
°C (140°F)
37
°C (99°F) or less
COOLAN TEMP/S
71
°C (160°F) or more (M/T)
65
°C (149°F) or more (CVT)
P0128 THERMOSTAT FUNCTION
EC-209
< DTC/CIRCUIT DIAGNOSIS >
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Component Inspection
INFOID:0000000009020727
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. Refer to
.
4. Check resistance between engine coolant temperature sensor
terminals by heating with hot water as shown in the figure.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace engine coolant temperature sensor. Refer to
Engine coolant temperature
sensor
Condition
Resistance
(k
Ω)
Terminal
1
2
Temperature [
°C (°F)]
20 (68)
2.10 - 2.90
50 (122)
0.68 - 1.00
90 (194)
0.236 - 0.260
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