Nissan Frontier D22. Instruction — part 485
DTC P1148, P1168 CLOSED LOOP CONTROL
EC-1043
[VG33E]
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EC
2.
Set voltmeter probes between ECM terminal 50 [HO2S1 (B1)
signal] or 51 [HO2S1 (B2) signal] and engine ground.
3.
Check the following with engine speed held at 2,000 rpm con-
stant under no-load.
–
The voltage should go above 0.70V at least once.
–
The voltage should go below 0.21V at least once.
4.
If NG, go to
EC-1043, "Diagnostic Procedure"
Diagnostic Procedure
UBS00DNW
Perform trouble diagnosis for DTC P0133, P0153,
EC-783, "Diagnostic Procedure"
.
SEF919UA
EC-1044
[VG33E]
DTC P1217 ENGINE OVER TEMPERATURE (OVERHEAT)
DTC P1217 ENGINE OVER TEMPERATURE (OVERHEAT)
PFP:00021
On Board Diagnosis Logic
UBS00DNX
If the cooling fan or another component in the cooling system malfunctions, engine coolant temperature will
rise. When the engine coolant temperature reaches an abnormally high temperature condition, a malfunction
is indicated.
This self-diagnosis has one trip detection logic.
CAUTION:
When a malfunction is indicated be sure to replace the coolant, follow the procedure in
. Also, replace the engine oil. Refer to
1.
Fill radiator with coolant up to specified level with a filling speed of 2 liters per minute like pouring
coolant by kettle. Be sure to use coolant with the proper mixture ratio. Refer to
2.
After refilling coolant, run engine to ensure that no water-flow noise is emitted.
Overall Function Check
UBS00DNY
Use this procedure to check the overall function of the cooling fan. During this check, a DTC might not be con-
firmed.
WARNING:
Never remove the radiator cap when the engine is hot. Serious burns could be caused by high pres-
sure fluid escaping from the radiator.
Wrap a thick cloth around cap. Carefully remove the cap by turning it a quarter turn to allow built-up
pressure to escape. Then turn the cap all the way off.
WITH CONSULT-II
1.
Check the coolant level in the reservoir tank and radiator.
Allow engine to cool before checking coolant level.
If the coolant level in the reservoir tank and/or radiator is below
the proper range, skip the following steps and go to
2.
Confirm whether customer filled the coolant or not. If customer
filled the coolant, skip the following steps and go to
3.
Start engine.
4.
Make sure that cooling fan (crankshaft driven) operates.
5.
If NG, go to
EC-1045, "Diagnostic Procedure"
WITH GST
1.
Check the coolant level in the reservoir tank and radiator.
Allow engine to cool before checking coolant level.
If the coolant level in the reservoir tank and/or radiator is below the proper range, skip the following steps
and go to
EC-1045, "Diagnostic Procedure"
2.
Confirm whether customer filled the coolant or not. If customer filled the coolant, skip the following steps
and go to
EC-1045, "Diagnostic Procedure"
3.
Start engine and make sure that cooling fan (crankshaft driven) operates.
Be careful not to overheat engine.
4.
If NG, go to
EC-1045, "Diagnostic Procedure"
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P1217
Engine over tempera-
ture (Overheat)
●
Cooling fan does not operate properly
(Overheat).
●
Cooling fan system does not operate prop-
erly (Overheat).
●
Engine coolant was not added to the sys-
tem using the proper filling method.
●
Engine coolant is not within the specified
range.
●
Cooling fan (crankshaft driven)
●
Radiator hose
●
Radiator
●
Radiator cap
●
Water pump
●
Thermostat
For more information, refer to
"Main 12 Causes of Overheating"
.
SEF621W
DTC P1217 ENGINE OVER TEMPERATURE (OVERHEAT)
EC-1045
[VG33E]
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Diagnostic Procedure
UBS00DNZ
1.
CHECK COOLING FAN (CRANKSHAFT DRIVEN) OPERATION
Start engine and make sure that cooling fan (crankshaft driven) operates.
OK or NG
OK
>> GO TO 2.
NG
>> Check cooling fan (crankshaft driven). Refer to
CO-32, "COOLING FAN (CRANKSHAFT
2.
CHECK COOLING SYSTEM FOR LEAK
Apply pressure to the cooling system with a tester, and check if the pressure drops.
CAUTION:
Higher than the specified pressure may cause radiator damage.
Pressure should not drop.
OK or NG
OK
>> GO TO 3.
NG
>> Check the following for leak
●
Hose
●
Radiator
●
Water pump
Refer to
3.
CHECK RADIATOR CAP
Apply pressure to cap with a tester and check radiator cap relief
pressure.
OK or NG
OK
>> GO TO 4.
NG
>> Replace radiator cap.
4.
CHECK THERMOSTAT
1.
Check valve seating condition at normal room temperatures.
It should seat tightly.
2.
Check valve opening temperature and valve lift.
3.
Check if valve is closed at 5
°C (9°F) below valve opening tem-
perature.
OK or NG
OK
>> GO TO 5.
NG
>> Replace thermostat
Testing pressure: 157 kPa (1.6 kg/cm, 23 psi)
SLC754A
Radiator cap
relief pressure
: 59 - 98 kPa (0.6 - 1.0 kg/cm
2
, 9 - 14
psi)
SLC755A
Valve opening
temperature
: 76.5
°C (170°F) [standard]
Valve lift
: More than 10 mm/90
°C (0.39 in/194°F)
SLC343
EC-1046
[VG33E]
DTC P1217 ENGINE OVER TEMPERATURE (OVERHEAT)
5.
CHECK ENGINE COOLANT TEMPERATURE SENSOR
Check resistance as shown in the figure.
<Reference data>
OK or NG
OK
>> GO TO 6.
NG
>> Replace engine coolant temperature sensor.
6.
CHECK MAIN 12 CAUSES
If the cause cannot be isolated, go to
EC-1046, "Main 12 Causes of Overheating"
>> INSPECTION END.
Main 12 Causes of Overheating
UBS00DO0
Temperature
°C (°F)
Resistance k
Ω
20 (68)
2.1 - 2.9
50 (122)
0.68 - 1.00
90 (194)
0.236 - 0.260
SEF152P
SEF012P
Engine
Step
Inspection item
Equipment
Standard
Reference page
OFF
1
●
Blocked radiator
●
Blocked condenser
●
Blocked radiator grille
●
Blocked bumper
●
Visual
No blocking
—
2
●
Coolant mixture
●
Coolant tester
50 - 50% coolant mixture
See
3
●
Coolant level
●
Visual
Coolant up to MAX level
in reservoir tank and radi-
ator filler neck
See
4
●
Radiator cap
●
Pressure tester
59 - 98 kPa
(0.6 - 1.0 kg/cm
2
, 9 - 14
psi) (Limit)
See
ON*
1
5
●
Coolant leaks
●
Visual
No leaks
See
ON*
1
6
●
Thermostat
●
Touch the upper and
lower radiator hoses
Both hoses should be hot
See
ON*
1
7
●
Cooling fan (crank-
shaft driven)
●
Visual
Operating
See
OFF
8
●
Combustion gas leak
●
Color checker chemical
tester 4 Gas analyzer
Negative
—
ON*
2
9
●
Coolant temperature
gauge
●
Visual
Gauge less than 3/4
when driving
—
●
Coolant overflow to
reservoir tank
●
Visual
No overflow during driv-
ing and idling
See
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