Nissan Terrano model r20 series 2004. Instruction — part 99
13
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)
CAUTION:
Higher than the specified pressure may cause radiator damage.
SLC754A
Pressure should not drop.
OK or NG
OK
E
GO TO 15.
NG
E
GO TO 14.
14
DETECT MALFUNCTIONING PART
Check the following for leak.
I
Hose
I
Radiator
I
Water pump (Refer to LC section, “Water Pump”.)
E
Repair or replace.
15
CHECK RADIATOR CAP
Apply pressure to cap with a tester and check radiator cap relief pressure.
SLC755A
Radiator cap relief pressure:
79 - 98 kPa (0.78 - 0.98 bar, 0.8 - 1.0 kg/cm
2
, 11 - 14 psi)
OK or NG
OK
E
GO TO 16.
NG
E
Replace radiator cap.
DTC 0208 OVER HEAT
ZD30DDTi
Diagnostic Procedure (Cont’d)
EC-118
16
CHECK THERMOSTAT
1. Remove thermostat.
2. Check valve seating condition at normal room temperatures.
It should seat tightly.
3. Check valve opening temperature and valve lift.
SLC343
Valve opening temperature:
82°C (180°F) [standard] (Models for cold areas)
76.5°C (170°F) [standard] (Models for except cold areas)
Valve lift:
More than 10 mm/95°C (0.394 in/203°F)
4. 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
E
GO TO 17.
NG
E
Replace thermostat.
17
CHECK ENGINE COOLANT TEMPERATURE SENSOR
1. Remove engine coolant temperature sensor.
2. Check resistance between engine coolant temperature sensor terminals 1 and 2 as shown in the figure.
SEF304X
OK or NG
OK
E
GO TO 18.
NG
E
Replace engine coolant temperature sensor.
DTC 0208 OVER HEAT
ZD30DDTi
Diagnostic Procedure (Cont’d)
EC-119
18
CHECK MAIN 12 CAUSES
If the cause cannot be isolated, go to “MAIN 12 CAUSES OF OVERHEATING”, EC-120.
E
INSPECTION END
Main 12 Causes of Overheating
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
30 - 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 MAIN-
TENANCE” in MA section.
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)
59 - 98 kPa (0.59 - 0.98
bar, 0.6 - 1.0 kg/cm
2
,
9 - 14 psi) (Limit)
See “System Check”,
“ENGINE COOLING SYS-
TEM” in LC section.
ON*2
5
I
Coolant leaks
I
Visual
No leaks
See “System Check”,
“ENGINE COOLING SYS-
TEM” 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
Visual
Operating
See “DTC 0208 OVER
HEAT”, EC-109.
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 “Changing Engine
Coolant”, “ENGINE MAIN-
TENANCE” in MA section.
OFF*4
10
I
Coolant return from res-
ervoir tank to radiator
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: Engine running at idle.
*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 0208 OVER HEAT
ZD30DDTi
Diagnostic Procedure (Cont’d)
EC-120
Description
The ECM consists of a microcomputer and connectors for signal
input and output and for power supply. The unit controls the engine.
On Board Diagnosis Logic
Malfunction is detected when ...
Check Items (Possible Cause)
I
ECM calculation function is malfunctioning.
I
ECM
DTC Confirmation Procedure
WITH CONSULT-II
1) Turn ignition switch “ON”.
2) Select “DATA MONITOR” mode with CONSULT-II.
3) Start engine and wait at least 2 seconds.
4) If DTC is detected, go to “Diagnostic Procedure”, EC-122.
WITHOUT CONSULT-II
1) Turn ignition switch “ON” and wait at least 2 seconds.
2) Start engine and wait at least 2 seconds.
3) Turn ignition switch “OFF”, wait at least 5 seconds and then turn
“ON”.
4) Perform “Diagnostic Test Mode II (Self-diagnostic results)” with
ECM.
5) If DTC is detected, go to “Diagnostic Procedure”, EC-122.
SEC220B
SEF817Y
DTC 0301 ECM 2
ZD30DDTi
EC-121
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