Nissan Primera P11. Instruction — part 185
12
CHECK RADIATOR CAP
Apply pressure to cap with a tester.
SLC755A
Radiator cap relief pressure:
59 - 98 kPa (0.59 - 0.98 bar, 0.6 - 1.0 kg/cm
2
, 9 - 14 psi)
OK or NG
OK
©
GO TO 13.
NG
©
Replace radiator cap.
13
CHECK THERMOSTAT
1. Check valve seating condition at normal room temperatures.
It should seat tightly.
2. Check valve opening temperature and valve lift.
SLC343
Valve opening temperature:
76.5°C (170°F) [standard]
Valve lift:
More than 8 mm/90°C (0.31 in/194°F)
3. Check if valve is closed at 5°C (9°F) below valve opening temperature.
For details, refer to LC section (“Thermostat”).
OK or NG
OK
©
GO TO 14.
NG
©
Replace thermostat
14
CHECK ENGINE COOLANT TEMPERATURE SENSOR
Refer to “Component Inspection”, EC-QG-124.
OK or NG
OK
©
GO TO 15.
NG
©
Replace engine coolant temperature sensor.
15
CHECK MAIN 12 CAUSES
If the cause cannot be isolated, go to “MAIN 12 CAUSES OF OVERHEATING”, EC-QG-298.
©
INSPECTION END
DTC P1217 OVERHEAT (COOLING SYSTEM)
QG16
I
18DE
Diagnostic Procedure (Cont’d)
EC-297
Main 12 Causes of Overheating
NCEC0492
Engine
Step
Inspection item
Equipment
Standard
Reference page
OFF
1
I
Blocked radiator
I
Blocked condenser
I
Blocked radiator grille
I
Blocked bumper
I
Visual
No blocking
—
2
I
Coolant mixture
I
Coolant tester
50 - 50% coolant mixture
See “RECOMMENDED
FLUIDS AND LUBRI-
CANTS” in MA section.
3
I
Coolant level
I
Visual
Coolant up to MAX level
in reservoir tank and
radiator filler neck
See “Changing Engine
Coolant”, “ENGINE
MAINTENANCE” in MA
section.
4
I
Radiator cap
I
Pressure tester
59 - 98 kPa
(0.59 - 0.98 bar, 0.6 - 1.0
kg/cm
2
, 9 - 14 psi) (Limit)
See “System Check”,
“ENGINE COOLING
SYSTEM” in LC section.
ON*
2
5
I
Coolant leaks
I
Visual
No leaks
See “System Check”,
“ENGINE COOLING
SYSTEM” in LC section.
ON*
2
6
I
Thermostat
I
Touch the upper and
lower radiator hoses
Both hoses should be hot See “Thermostat” and
“Radiator”, “ENGINE
COOLING SYSTEM” in
LC section.
ON*
1
7
I
Cooling fan
I
CONSULT-II
Operating
See “TROUBLE DIAG-
NOSIS FOR OVER-
HEAT” (EC-QG-289).
OFF
8
I
Combustion gas leak
I
Color checker chemical
tester 4 Gas analyzer
Negative
—
ON*
3
9
I
Coolant temperature
gauge
I
Visual
Gauge less than 3/4
when driving
—
I
Coolant overflow to
reservoir tank
I
Visual
No overflow during driv-
ing and idling
See “Changing Engine
Coolant”, “ENGINE
MAINTENANCE” in MA
section.
OFF*
4
10
I
Coolant return from
reservoir tank to radia-
tor
I
Visual
Should be initial level in
reservoir tank
See “ENGINE MAINTE-
NANCE” in MA section.
OFF
11
I
Cylinder head
I
Straight gauge feeler
gauge
0.1 mm (0.004 in) Maxi-
mum distortion (warping)
See “Inspection”, “CYLIN-
DER HEAD” in EM sec-
tion.
12
I
Cylinder block and pis-
tons
I
Visual
No scuffing on cylinder
walls or piston
See “Inspection”, “CYLIN-
DER BLOCK” in EM sec-
tion.
*1: Turn the ignition switch ON.
*2: Engine running at 3,000 rpm for 10 minutes.
*3: Drive at 90 km/h (55 MPH) for 30 minutes and then let idle for 10 minutes.
*4: After 60 minutes of cool down time.
For more information, refer to “OVERHEATING CAUSE ANALYSIS” in LC section.
DTC P1217 OVERHEAT (COOLING SYSTEM)
QG16
I
18DE
Main 12 Causes of Overheating
EC-298
Component Inspection
NCEC0493
COOLING FAN RELAYS
NCEC0493S01
Check continuity between terminals 3 and 5.
Conditions
Continuity
12V direct current supply between terminals 1 and
2
Yes
No current supply
No
If NG, replace relay.
COOLING FAN MOTORS-1 AND -2
NCEC0493S02
1.
Disconnect cooling fan motor harness connectors.
2.
Supply cooling fan motor terminals with battery voltage and
check operation.
Terminals
(+)
(−)
Cooling fan motor
1
2
Cooling fan motor should operate.
If NG, replace cooling fan motor.
REFRIGERANT PRESSURE SENSOR
NCEC0493S03
With the refrigerant pressure sensor installed on the vehicle, start
the engine and while idling, read the voltage at refrigerant pressure
sensor terminals 1 and 2. (Refer to wiring diagram.)
Air conditioner condition
Voltage V
OFF
More than approx. 0.3V
ON
More than approx. 1.5V
ON to OFF
Decreasing gradually
If results are NG, check for 5V between refrigerant sensor termi-
nal 3 and ground. If there is 5V, replace sensor.
SEF511P
SEF721Q
DTC P1217 OVERHEAT (COOLING SYSTEM)
QG16
I
18DE
Component Inspection
EC-299
Component Description
NCEC0342
The EGR temperature sensor detects temperature changes in the
EGR passageway. When the EGR volume control valve opens, hot
exhaust gases flow, and the temperature in the passageway
changes. The EGR temperature sensor is a thermistor that modi-
fies a voltage signal sent from the ECM. This modified signal then
returns to the ECM as an input signal. As the temperature
increases, EGR temperature sensor resistance decreases. This
sensor is not used to control the engine system.
It is used only for the on board diagnosis.
<Reference data>
EGR temperature
°C (°F)
Voltage*
V
Resistance
M
Ω
0 (32)
4.56
0.62 - 1.05
50 (122)
2.25
0.065 - 0.094
100 (212)
0.59
0.011 - 0.015
*: These data are reference values and are measured between ECM terminal 72
(EGR temperature sensor) and ground.
When EGR system is operating.
Voltage: 0 - 1.5V
CAUTION:
Do not use ECM ground terminals when measuring input/
output voltage. Doing so may result in damage to the ECM’s
transistor. Use a ground other than ECM terminals, such as
the ground.
On Board Diagnosis Logic
NCEC0343
DTC No.
Malfunction is detected when ...
Check Items (Possible Cause)
P1401
1401
A)
An excessively low voltage from the EGR tempera-
ture sensor is sent to ECM even when engine cool-
ant temperature is low.
I
Harness or connectors
(The EGR temperature sensor circuit is shorted.)
I
EGR temperature sensor
I
Malfunction of EGR function
B)
An excessively high voltage from the EGR tempera-
ture sensor is sent to ECM even when engine cool-
ant temperature is high.
I
Harness or connectors
(The EGR temperature sensor circuit is open.)
I
EGR temperature sensor
I
Malfunction of EGR function
DTC Confirmation Procedure
NCEC0344
Perform “PROCEDURE FOR MALFUNCTION A” first. If 1st trip
DTC cannot be confirmed, perform “PROCEDURE FOR MAL-
FUNCTION B”.
NOTE:
If “DTC Confirmation Procedure” has been previously conducted,
always turn ignition switch “OFF” and wait at least 9 seconds
before conducting the next test.
SEF599K
SEF068X
DTC P1401 EGR TEMPERATURE SENSOR
(IF SO EQUIPPED)
QG16
I
18DE
Component Description
EC-300
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст