Nissan Terrano model r20 series 2004. Instruction — part 181
q
B
CHECK COMPONENT
(A/C relay).
Refer to “COMPONENT INSPECTION” on
page EC-449.
OK
Disconnect and reconnect harness con-
nectors in the circuit. Then retest.
Trouble is not fixed.
Check ECM pin terminals for damage and
check the connection of ECM harness
connector. Reconnect ECM harness con-
nector and retest.
INSPECTION END
H
H
H
H
DTC P1217 OVER HEAT
TD27Ti
Diagnostic Procedure (Cont’d)
EC-446
q
c
CHECK COOLING SYSTEM FOR LEAK.
Apply pressure to the cooling system with
a tester, and check if the pressure drops.
Testing pressure:
157 kPa (1.57 bar, 1.6 kg/cm
2
, 23 psi)
Pressure should not drop.
CAUTION:
Higher than the specified pressure may
cause radiator damage.
OK
E
NG
Check the following for
leak.
I
Hose
I
Radiator
I
Water pump
Refer to LC section (“Water
Pump”).
CHECK RADIATOR CAP.
Apply pressure to cap with a tester.
Radiator cap relief pressure:
78 - 98 kPa (0.78 - 0.98 bar, 0.8 - 1.0
kg/cm
2
, 11 - 14 psi)
OK
E
NG
Replace radiator cap.
CHECK THERMOSTAT.
1. Check valve seating condition at normal
room temperatures.
It should seat tightly.
2. Check valve opening temperature and
valve lift.
Valve opening temperature:
76.5°C (170°F) [standard]
Valve lift:
More than 10 mm/90°C
(0.39 in/194°F)
3. Check if valve is closed at 5°C (9°F)
below valve opening temperature.
For details, refer to LC section (“Thermo-
stat”).
OK
E
NG
Replace thermostat
Check engine coolant temperature sensor.
Refer to “COMPONENT INSPECTION”,
EC-449.
OK
E
NG
Replace engine coolant
temperature sensor.
If the cause can not be isolated, go to
“MAIN 12 CAUSES OF OVERHEATING”
on EC-448.
INSPECTION END
SLC754A
SLC755A
SLC343
H
H
H
H
H
H
DTC P1217 OVER HEAT
TD27Ti
Diagnostic Procedure (Cont’d)
EC-447
Main 12 Causes of Overheating
Engine
Step
Inspection item
Equipment
Condition
Reference page
OFF
1
I
Blocked radiator
I
Blocked radiator grille
I
Blocked bumper
I
Visual
No blocking
—
2
I
Coolant mixture
I
Coolant tester
50 - 50% coolant mixture
See MA section, “RECOM-
MENDED FLUIDS AND
LUBRICANTS”.
3
I
Coolant level
I
Visual
Coolant up to MAX level in
reservoir tank and radiator
filler neck
See LC section, “Changing
Engine Coolant”.
4
I
Radiator cap
I
Pressure tester
78 - 98 kPa (0.78 - 0.98
bar, 0.8 - 1.0 kg/cm
2, 11 - 14
psi)
See LC section, “System
Check”.
ON*
2
5
I
Coolant leaks
I
Visual
No leaks
See LC section, “System
Check”.
ON*
2
6
I
Thermostat
I
Touch the upper and
lower radiator hoses
Both hoses should be hot
See LC section, “Thermo-
stat” and “Radiator”.
ON*
1
7
I
Cooling fan
I
CONSULT-II
Operating
See Trouble Diagnosis for
DTC P1217, EC-441.
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 res-
ervoir tank
I
Visual
No overflow during driving
and idling
See LC section, “Changing
Engine Coolant”.
OFF*
4
10
I
Coolant return from res-
ervoir tank to radiator
I
Visual
Should be initial level in
reservoir tank
See LC section, “REFILL-
ING ENGINE COOLANT”.
OFF
11
I
Cylinder head
I
Straight gauge feeler
gauge
0.1 mm (0.004 in) Maxi-
mum distortion (warping)
See EM section, “Inspec-
tion”.
12
I
Cylinder block and pis-
tons
I
Visual
No scuffing on cylinder
walls or piston
See EM section, “Inspec-
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 LC section, “OVERHEATING CAUSE ANALYSIS”.
DTC P1217 OVER HEAT
TD27Ti
EC-448
Component Inspection
COOLING FAN RELAY AND A/C RELAY
1. Turn ignition switch OFF.
2. Disconnect cooling fan relay and A/C relay.
3. Check continuity between each relay terminal
q
3
and
q
5
under
the following conditions.
Apply 12V direct current between
relay terminals
q
1
and
q
2
.
Continuity should exist.
No voltage applied.
Continuity should not exist.
4. If NG, replace cooling fan relay or/and A/C relay(s).
MEC942D
DTC P1217 OVER HEAT
TD27Ti
EC-449
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