2002 NISSAN TERRANO engine overheat

18 CHECK MAIN 12 CAUSES
If the cause cannot be isolated, go to ªMAIN 12 CAUSES OF OVERHEATINGº, EC-120.
EINSPECTION END
Main 12 Causes of Overheating
Engine Step Inspection item Equipment Standard Reference page
OFF 1IBlocked radiator
IBlocked condenser
IBlocked radiator grille
IBlocked bumperIVisual No blocking Ð
2ICoolant mixtureICoolant tester 30 - 50% coolant mixture See ªRECOMMENDED
FLUIDS AND LUBRI-
CANTSº in MA section.
3ICoolant levelIVisual Coolant up to MAX level
in reservoir tank and
radiator filler neckSee ªChanging Engine
Coolantº, ªENGINE MAIN-
TENANCEº in MA section.
4IRadiator capIPressure 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 ªSystem Checkº,
ªENGINE COOLING SYS-
TEMº in LC section.
ON*2 5ICoolant leaksIVisual No leaks See ªSystem Checkº,
ªENGINE COOLING SYS-
TEMº in LC section.
ON*2 6IThermostatITouch the upper and
lower radiator hosesBoth hoses should be hot. See ªThermostatº and
ªRadiatorº, ªENGINE
COOLING SYSTEMº in
LC section.
ON*1 7ICooling fanIVisual Operating See ªDTC 0208 OVER
HEATº, EC-109.
OFF 8ICombustion gas leakIColor checker chemical
tester 4 gas analyzerNegative Ð
ON*3 9ICoolant temperature
gaugeIVisual Gauge less than 3/4
when drivingÐ
ICoolant overflow to res-
ervoir tankIVisual No overflow during driving
and idlingSee ªChanging Engine
Coolantº, ªENGINE MAIN-
TENANCEº in MA section.
OFF*4 10ICoolant return from res-
ervoir tank to radiatorIVisual Should be initial level in
reservoir tankSee ªENGINE MAINTE-
NANCEº in MA section.
OFF 11ICylinder headIStraight gauge feeler
gauge0.1 mm (0.004 in) Maxi-
mum distortion (warping)See ªInspectionº, ªCYLIN-
DER HEADº in EM sec-
tion.
12ICylinder block and pis-
tonsIVisual No scuffing on cylinder
walls or pistonSee ªInspectionº, ªCYLIN-
DER BLOCKº 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 ªOVERHEATING CAUSE ANALYSISº in LC section.
DTC 0208 OVER HEATZD30DDTi
Diagnostic Procedure (Cont'd)
EC-120

Symptom Matrix Chart
SYSTEM
Ð Basic engine
control systemSYMPTOM
Reference page
Feature of symptom, Check pointHARD/NO START/RESTART (EXCP. HA)
ENGINE STALL
HESITATION/SURGING/FLAT SPOT
SPARK KNOCK/DETONATION
LACK OF POWER
POOR ACCELERATION
HI IDLE
LOW IDLE
ROUGH IDLE/HUNTING
IDLING VIBRATION
SLOW/NO RETURN TO IDLE
OVERHEAT/HIGH ENGINE COOLANT TEMPERATURE
EXCESSIVE FUEL CONSUMPTION
EXCESSIVE OIL CONSUMPTION
ABNORMAL SMOKE COLOR
DEAD BATTERY (UNDER CHARGE)
Malfunction indicator lamp illuminates.
Can be detected by CONSULT-II?
Fuel cutNO START (with first firing)
NO START (without first firing)
HARD TO START WHEN ENGINE IS COLD
HARD TO START WHEN ENGINE IS HOT
AT IDLE
DURING DRIVING
WHEN DECELERATING
BLACK SMOKE
WHITE SMOKENew CT/CS AA AB AC AD AE AF AG AH AJ AK AL AM AP HA
Injec-
tion
timingAdvancedqq
IIqIqqIqEC-338
Retardedqq
IIqIqqIqEC-338
Electric injection
pump mainframe
IIIIqqqqqIqqqIIqqIq qqqÐ*1
Injection nozzleqqqqqqq
Iqq qII IEC-313 *2
Glow systemqq
II I IEC-389
Engine body
qq
IIqqqIqq qIIqqqIEM-
section*3
EGR system
II IEC-431
Air cleaner and
ducts
II IqMA-
section*4
I; High Possibility Item
q; Low Possibility Item
*1: Insufficient or excess amount. Governor malfunction may be the cause.
*2: Depends on open-valve pressure and spray pattern.
*3: Caused mainly by insufficient compression pressure.
*4: Symptom varies depending on off-position of air duct, etc.
TROUBLE DIAGNOSESTD27Ti
EC-340

SYSTEM Ð Engine control system Malfunction
SYMPTOM
Reference page Feature of symptom
Check point
HARD/NO START/
RESTART (EXCP. HA) ENGINE STALL HESITATION/SURGING/FLAT SPOT SPARK KNOCK/DETONATION
LACK OF POWER
POOR ACCELERATION
HI IDLE
LOW IDLE
ROUGH IDLE/HUNTING
IDLING VIBRATION
SLOW/NO RETURN TO IDLE
OVERHEAT/HIGH ENGINE COOLANT TEMPERATURE
EXCESSIVE FUEL CONSUMPTION
EXCESSIVE OIL CONSUMPTION ABNORMAL SMOKE COLOR
DEAD BATTERY (UNDER CHARGE) Malfunction indicator lamp illuminates.
Can be detected by CONSULT-II?
Fuel cut
NO START (with first firing) NO START (without first firing)
HARD TO START WHEN ENGINE IS COLD
HARD TO START WHEN ENGINE IS HOT
AT IDLE
DURING DRIVING
WHEN DECELERATINGBLACK SMOKE WHITE SMOKE
New CT/CS AA AB AC AD AE AF AG AH AJ AK AL AM AP HA
Mass air flow sensor circuit open, ground shortqqq q
EC-356
shortqqq
Engine coolant temperature sensor
circuit open, shortqqq qqq qqEC-361Compensation according to
engine coolant temperature does
not function.
Vehicle speed sensor circuit open, shortqqEC-397
Control sleeve position sensor circuit open, shortqqqqqqEC-414
Injection timing control valve circuit
open, shortqqq
EC-380Injection timing cannot be con-
trolled.
ground shortqq
Accelerator switch (F/C) circuit open, shortqqq
EC-365
ground shortqq
Needle lift sensor circuit open, shortqqqEC-427
Fuel cut solenoid valve circuit open, ground shortq qqqq
EC-376
shortqqqEngine runs on after turning igni-
tion switch OFF.
Fuel temperature sensor circuit
open, shortqq qq qq qq q qEC-372Compensation for amount of fuel
injected according to fuel tem-
perature does not function.
Accelerator position sensor circuit open, shortqqq qqEC-365
Crankshaft position sensor (TDC) cir-
cuitopen, shortqq qq
EC-385
noiseqqqqq
TROUBLE DIAGNOSESTD27Ti
Symptom Matrix Chart (Cont'd)
EC-341

SYSTEM Ð Engine control systemMalfunction
SYMPTOM
Reference page
Feature of symptom
Check point
HARD/NO START/
RESTART (EXCP. HA) ENGINE STALL HESITATION/SURGING/FLAT SPOT SPARK KNOCK/DETONATION
LACK OF POWER
POOR ACCELERATION
HI IDLE
LOW IDLE
ROUGH IDLE/HUNTING
IDLING VIBRATION
SLOW/NO RETURN TO IDLE
OVERHEAT/HIGH ENGINE COOLANT TEMPERATURE
EXCESSIVE FUEL CONSUMPTION
EXCESSIVE OIL CONSUMPTION ABNORMAL SMOKE COLOR
DEAD BATTERY (UNDER CHARGE) Malfunction indicator lamp illuminates.
Can be detected by CONSULT-II?
Fuel cut
NO START (with first firing) NO START (without first firing)
HARD TO START WHEN ENGINE IS COLD
HARD TO START WHEN ENGINE IS HOT
AT IDLE
DURING DRIVING
WHEN DECELERATINGBLACK SMOKE WHITE SMOKE
New CT/CS AA AB AC AD AE AF AG AH AJ AK AL AM AP HA
Start signal circuit open, shortqqEC-449 Start control does not function.
Air conditioner switch circuit
open, ground short
EC-440Air Conditioner does not stop
operating.
shortAir Conditioner does not work.
Ignition switch circuit openq qqq
EC-449
shortEngine does not stop.
Power supply for ECM circuit openqqq
EC-352
shortqq
Throttle control solenoid valve circuit open, short
EC-435Does not operate.
ground shortqq qDoes not stop operating.
EGRC-solenoid valve A, B circuit open, short
EC-431
ground shortqDoes not stop operating.
Glow relay circuit openqqqqq
EC-389Glow lamp does not turn on.
shortGlow lamp does not turn off.
ECM relay (Self-shut off) circuit openqqqq
EC-446
shortqqGround short makes engine
unable to stop.
Air conditioner relay circuit open
EC-440Air conditioner does not operate.
shortAir conditioner does not stop
operating.
ECM, Connector circuit open, shortqqqqqqqqqqqqqq qqqqqqqqqqqEC-346, 452
TROUBLE DIAGNOSESTD27Ti
Symptom Matrix Chart (Cont'd)
EC-342

Description
SYSTEM DESCRIPTION
Sensor Input signal to ECM ECM function Actuator
Engine coolant temperature
sensorEngine coolant temperature
Cooling fan control Cooling fan relay
Air conditioner switch Air conditioner ªONº signal
The ECM controls the cooling fan corresponding to the vehicle speed, engine coolant temperature, air condi-
tioner ON signal.
On Board Diagnosis Logic
This diagnosis continuously monitors the engine coolant temperature.
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.
DTC Malfunction is detected when ... Check Items (Possible Cause)
P1217
0208ICooling fan does not operate properly (Overheat).
ICooling fan system does not operate properly (Over-
heat).
IEngine coolant was not added to the system using
the proper filling method.IHarness or connectors
(The cooling fan circuit is open or shorted.)
ICooling fan
IRadiator hose
IRadiator
IRadiator cap
IWater pump
IThermostat
IEngine coolant temperature sensor
For more information, refer to ªMAIN 12 CAUSES OF
OVERHEATINGº, EC-425.
CAUTION:
When a malfunction is indicated, be sure to replace the coolant following the procedure in the LC
section, ªChanging Engine Coolantº. Also, replace the engine oil.
1) Fill radiator with coolant up to specified level with a filling speed of 2 liters per minute. Be sure to
use coolant with the proper mixture ratio. Refer to MA section, ªEngine Coolant Mixture Ratioº.
2) After refilling coolant, run engine to ensure that no water-flow noise is emitted.
DTC P1217 OVER HEATTD27Ti
EC-418

Overall Function Check
Use this procedure to check the overall function of the cooling fan.
During this check, a DTC might not be confirmed.
WARNING:
Never remove the radiator cap when the engine is hot. Serious
burns could be caused by high pressure fluid escaping from
the radiator.
Wrap a thick cloth around the 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 ªDiagnos-
tic Procedureº, EC-421.
2) Confirm whether customer filled the coolant or not. If customer
filled the coolant, skip the following steps and go to ªDiagnos-
tic Procedureº, EC-421.
3) Turn ignition switch ªONº.
4) Perform ªCOOLING FANº in ªACTIVE TESTº mode with CON-
SULT-II and make sure that cooling fans operate.
If NG, go to ªDiagnostic Procedureº, EC-421.
WITHOUT 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 ªDiagnos-
tic Procedureº, EC-421.
2) Confirm whether customer filled the coolant or not. If customer
filled the coolant, skip the following steps and go to ªDiagnos-
tic Procedureº, EC-421.
3) Start engine.
Be careful not to overheat engine.
4) Set temperature control lever to full cold position.
5) Turn air conditioner switch ªONº.
6) Turn blower fan switch ªONº.
7) Run engine at idle for a few minutes with air conditioner oper-
ating.
Be careful not to overheat engine.
8) Make sure that cooling fans operate at low speed.
9) Turn ignition switch ªOFFº.
10) Turn air conditioner switch and blower fan switch ªOFFº.
11) Disconnect engine coolant temperature sensor harness con-
nector.
12) Connect 150Wresistor to engine coolant temperature sensor
harness connector.
13) Start engine and make sure that cooling fans operate at higher
speed than low speed.
Be careful not to overheat engine.
14) If NG, go to ªDiagnostic Procedureº, EC-421.
AEC640
SEF111X
SEC163BA
MEC475B
DTC P1217 OVER HEATTD27Ti
EC-419

qc
CHECK COOLING SYSTEM FOR LEAK.
Apply pressure to the cooling system with
a tester, and check if the pressure drops.
Testing pressure:
157 kPa (1.6 kg/cm
2, 23 psi)
Pressure should not drop.
CAUTION:
Higher than the specified pressure may
cause radiator damage.
OK
ENG
Check the following for
leak.
IHose
IRadiator
IWater pump
Refer to LC section (ªWater
Pumpº).
CHECK RADIATOR CAP.
Apply pressure to cap with a tester.
Radiator cap relief pressure:
78 - 98 kPa (0.8 - 1.0 kg/cm
2,11-14
psi)
OK
ENG
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:
76.5ÉC (170ÉF) [standard]
Valve lift:
More than 10 mm/90ÉC
(0.39 in/194ÉF)
3. Check if valve is closed at 5ÉC (9ÉF)
below valve opening temperature.
For details, refer to LC section (ªThermo-
statº).
OK
ENG
Replace thermostat
Check engine coolant temperature sensor.
Refer to ªCOMPONENT INSPECTIONº,
EC-426.
OK
ENG
Replace engine coolant
temperature sensor.
If the cause can not be isolated, go to
ªMAIN 12 CAUSES OF OVERHEATINGº
on EC-425.
INSPECTION END
SLC754A
SLC755A
SLC343
H
H
H
H
H
H
DTC P1217 OVER HEATTD27Ti
Diagnostic Procedure (Cont'd)
EC-424

Main 12 Causes of Overheating
Engine Step Inspection item Equipment Condition Reference page
OFF1IBlocked radiator
IBlocked radiator grille
IBlocked bumperIVisual No blocking Ð
2ICoolant mixtureICoolant tester 50 - 50% coolant mixtureSee MA section, ªRECOM-
MENDED FLUIDS AND
LUBRICANTSº.
3ICoolant levelIVisualCoolant up to MAX level in
reservoir tank and radiator
filler neckSee LC section, ªChanging
Engine Coolantº.
4IRadiator capIPressure tester78 - 98 kPa (0.78 - 0.98
bar, 0.8 - 1.0 kg/cm
2,11-14
psi)See LC section, ªSystem
Checkº.
ON*
25ICoolant leaksIVisual No leaksSee LC section, ªSystem
Checkº.
ON*
26IThermostatITouch the upper and
lower radiator hosesBoth hoses should be hotSee LC section, ªThermo-
statº and ªRadiatorº.
ON*
17ICooling fanICONSULT-II OperatingSee Trouble Diagnosis for
DTC P1217, EC-418.
OFF 8ICombustion gas leakIColor checker chemical
tester 4 Gas analyzerNegative Ð
ON*
39ICoolant temperature
gaugeIVisualGauge less than 3/4 when
drivingÐ
ICoolant overflow to res-
ervoir tankIVisualNo overflow during driving
and idlingSee LC section, ªChanging
Engine Coolantº.
OFF*
410ICoolant return from res-
ervoir tank to radiatorIVisualShould be initial level in
reservoir tankSee LC section, ªREFILL-
ING ENGINE COOLANTº.
OFF11ICylinder headIStraight gauge feeler
gauge0.1 mm (0.004 in) Maxi-
mum distortion (warping)See EM section, ªInspec-
tionº.
12ICylinder block and pis-
tonsIVisualNo scuffing on cylinder
walls or pistonSee EM section, ªInspec-
tionº.
*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, ªOVERHEATING CAUSE ANALYSISº.
DTC P1217 OVER HEATTD27Ti
EC-425