Nissan Frontier D22. Manual — part 436
DTC P0217 COOLANT OVERTEMPERATURE ENRICHMENT PROTECTION
EC-847
[VG33E]
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EC
Be extremely careful not to touch any moving or adjacent parts.
5.
Check radiator for blocked air passage
Check for blocked condenser or radiator (condenser or radiator fins damaged, condenser or radiator
clogged), after market fog lamps ...etc. Check for condenser or radiator fin damage, shroud damage, vehi-
cle front end for clogging of debris or insects ...etc.
Check for improper fitting of front end cover, damaged radiator grille or bumper, vehicle frontal area dam-
aged by collision but not repaired.
If NG, take appropriate action and then go to next step.
6.
Check ECT sensor for proper operation. Refer to step 5 of
EC-847, "Diagnostic Procedure"
replace ECT sensor and go to next step.
7.
Check ignition timing. Refer to
Make sure that ignition timing is 10
± 5° at 700 ± 50 rpm.
If NG, adjust ignition timing and then recheck.
Diagnostic Procedure
UBS00DJC
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
SEF927Z
Testing pressure: 157 kPa (1.6 kg/cm
2
, 23 psi)
SLC754A
EC-848
[VG33E]
DTC P0217 COOLANT OVERTEMPERATURE ENRICHMENT PROTECTION
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.
For details, refer to
.
OK or NG
OK
>> GO TO 5.
NG
>> Replace thermostat.
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.
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 (0.31 in/194°F)
SLC343
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
DTC P0217 COOLANT OVERTEMPERATURE ENRICHMENT PROTECTION
EC-849
[VG33E]
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6.
CHECK MAIN 12 CAUSES
If the cause cannot be isolated, go to
EC-849, "Main 12 Causes of Overheating"
.
>> INSPECTION END.
Main 12 Causes of Overheating
UBS00DJD
*1: Engine running at 3,000 rpm for 10 minutes.
*2: Drive at 90 km/h (55 MPH) for 30 minutes and then let idle for 10 minutes.
*3: After 60 minutes of cool down time.
For more information, refer to
CO-21, "OVERHEATING CAUSE ANALYSIS"
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
(Crankshaft 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
OFF*
3
10
●
Coolant return from
reservoir tank to radia-
tor
●
Visual
Should be initial level in
reservoir tank
See
OFF
11
●
Cylinder head
●
Straight gauge feeler
gauge
0.1 mm (0.004 in) Maxi-
mum distortion (warping)
See
.
12
●
Cylinder block and pis-
tons
●
Visual
No scuffing on cylinder
walls or piston
See
EC-850
[VG33E]
DTC P0300 - P0306 MULTIPLE CYLINDER MISFIRE, NO. 1 - 6 CYLINDER MIS-
FIRE
DTC P0300 - P0306 MULTIPLE CYLINDER MISFIRE, NO. 1 - 6 CYLINDER MIS-
FIRE
PFP:00000
On Board Diagnosis Logic
UBS00DJE
When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the CKP
sensor signal to vary, ECM can determine that a misfire is occurring.
The misfire detection logic consists of the following two conditions.
1.
One Trip Detection Logic (Three Way Catalyst Damage)
On the first trip that a misfire condition occurs that can damage the three way catalyst (TWC) due to over-
heating, the MIL will blink.
When a misfire condition occurs, the ECM monitors the CKP sensor signal every 200 engine revolutions
for a change.
When the misfire condition decreases to a level that will not damage the TWC, the MIL will turn off.
If another misfire condition occurs that can damage the TWC on a second trip, the MIL will blink.
When the misfire condition decreases to a level that will not damage the TWC, the MIL will remain on.
If another misfire condition occurs that can damage the TWC, the MIL will begin to blink again.
2.
Two Trip Detection Logic (Exhaust quality deterioration)
For misfire conditions that will not damage the TWC (but will affect vehicle emissions), the MIL will only
light when the misfire is detected on a second trip. During this condition, the ECM monitors the CKP sen-
sor signal every 1,000 engine revolutions.
A misfire malfunction can be detected on any one cylinder or on multiple cylinders.
DTC Confirmation Procedure
UBS00DJF
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 5 seconds before conducting the next test.
Sensor
Input Signal to ECM
ECM function
Crankshaft position sensor (OBD)
Engine speed
On board diagnosis of misfire
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0300
Multiple cylinder misfire
detected
Multiple cylinder misfire.
●
Improper spark plug
●
Insufficient compression
●
Incorrect fuel pressure
●
The injector circuit is open or shorted
●
Fuel injector
●
Intake air leak
●
The ignition secondary signal circuit is
open or shorted
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Lack of fuel
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Signal plate or flywheel
●
Heated oxygen sensor 1
●
Incorrect PCV hose connection
P0301
No.1 cylinder misfire
detected
No. 1 cylinder misfires.
P0302
No. 2 cylinder misfire
detected
No. 2 cylinder misfires.
P0303
No. 3 cylinder misfire
detected
No. 3 cylinder misfires.
P0304
No. 4 cylinder misfire
detected
No. 4 cylinder misfires.
P0305
No. 5 cylinder misfire
detected
No. 5 cylinder misfires.
P0306
No. 6 cylinder misfire
detected
No. 6 cylinder misfires.
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