2003 NISSAN ALMERA N16 iat

TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA(DC Voltage)
221 LG/B Cooling fan relay (High)[Engine is running]
Cooling fans are not operating
Cooling fans are operating at low speedBATTERY VOLTAGE
(11 - 14V)
[Engine is running]
Cooling fans are operating at high speedApproximately 0.1V
On Board Diagnosis LogicNJEC0663This 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.
This self-diagnosis has the one trip detection logic.
DTC Malfunction is detected when ... Check Items (Possible Cause)
P1217
0208Cooling fan does not operate properly (Overheat).
Cooling fan system does not operate properly
(Overheat).
Engine coolant was not added to the system using
the proper filling method.Harness or connectors
(The cooling fan circuit is open or shorted.)
Cooling fan
Radiator hose
Radiator
Radiator cap
Water pump
Thermostat
Engine coolant temperature sensor
For more information, refer to “MAIN 12 CAUSES OF
OVERHEATING”, EC-144.
CAUTION:
When a malfunction is indicated, be sure to replace the coolant following the procedure in the LC-43,
“Changing Engine Coolant”. Also, replace the engine oil.
1) Fill radiator with coolant up to specified level with a filling speed of 2liters per minute. Be sure
to use coolant with the proper mixture ratio. Refer to MA-21, “Engine Coolant Mixture Ratio”.
2) After refilling coolant, run engine to ensure that no water-flow noise is emitted.
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DTC P1217 OVER HEATYD
ECM Terminals and Reference Value (Cont’d)
EC-131

AEC640
Overall Function Check
SEF111X
SEC163BA
MEC475B
NJEC0664Use 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-IINJEC0664S011) 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 “Diagnos-
tic Procedure”, EC-134.
2) Confirm whether customer filled the coolant or not. If customer
filled the coolant, skip the following steps and go to “Diagnos-
tic Procedure”, EC-134.
3) Turn ignition switch “ON”.
4) Perform “COOLING FAN” in “ACTIVE TEST” mode with CON-
SULT-II and make sure that cooling fans operate when touch-
ing “HIGH” or “LOW”.
If NG, go to “Diagnostic Procedure”, EC-134.
WITHOUT CONSULT-IINJEC0664S021) 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 “Diagnos-
tic Procedure”, EC-134.
2) Confirm whether customer filled the coolant or not. If customer
filled the coolant, skip the following steps and go to “Diagnos-
tic Procedure”, EC-134.
3) Start engine.
Be careful not to overheat engine.
4) Set temperature control lever to full cold position.
5) Turn air conditioner switch “ON”.
6) Turn blower fan switch “ON”.
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 “OFF”.
10) Turn air conditioner switch and blower fan switch “OFF”.
11) Disconnect engine coolant temperature sensor harness con-
nector.
12) Connect 150Ωresistor 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 “Diagnostic Procedure”, EC-134.
DTC P1217 OVER HEATYD
Overall Function Check
EC-132

5 CHECK COOLING FAN HIGH SPEED OPERATION
Without CONSULT-II
1. Turn ignition switch “OFF”.
2. Reconnect cooling fan relay-3.
3. Turn air conditioner switch and blower fan switch “OFF”.
4. Disconnect engine coolant temperature sensor harness connector.
5. Connect 150Ωresistor to engine coolant temperature sensor harness connector.
6. Restart engine and make sure that cooling fans-1 and -2 operate at high speed.
MEC475B
OK or NG
OK GO TO 6.
NG Check cooling fan high speed control circuit. (Go to PROCEDURE B, EC-141.)
6 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/cm2,23psi)
CAUTION:
Higher than the specified pressure may cause radiator damage.
SLC754A
Pressure should not drop.
OK or NG
OK GO TO 8.
NG GO TO 7.
7 DETECT MALFUNCTIONING PART
Check the following for leak.
Hose
Radiator
Water pump (Refer to LC-38, “Water Pump”.)
Repair or replace.
DTC P1217 OVER HEATYD
Diagnostic Procedure (Cont’d)
EC-136

8 CHECK RADIATOR CAP
Apply pressure to cap with a tester and check radiator cap relief pressure.
SLC755A
Radiator cap relief pressure:
59 - 98 kPa (0.59 - 0.98 bar, 0.6 - 1.0 kg/cm2,9-14psi)
OK or NG
OK GO TO 9.
NG Replace radiator cap.
9 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]
Valve lift:
More than 8.6 mm/95°C (0.339 in/203°F)
4. Check if valve is closed at 5°C (9°F) below valve opening temperature. For details, refer to LC-40, “Thermostat”.
OK or NG
OK GO TO 10.
NG Replace thermostat.
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DTC P1217 OVER HEATYD
Diagnostic Procedure (Cont’d)
EC-137

9 CHECK INTERMITTENT INCIDENT
1. Perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-71.
INSPECTION END
Main 12 Causes of OverheatingNJEC0667
Engine Step Inspection item Equipment Condition Reference page
OFF 1 Blocked radiator
Blocked radiator grille
Blocked bumperVisual No blocking —
2 Coolant mixture Coolant tester 50 - 50% coolant mixture See MA-19, “RECOM-
MENDED FLUIDS AND
LUBRICANTS”.
3 Coolant level Visual Coolant up to MAX level
in reservoir tank and
radiator filler neckSee LC-17, “Changing
Engine Coolant”.
4 Radiator cap Pressure tester 78 - 98 kPa
(0.78 - 0.98 bar, 0.8 - 1.0
kg/cm
2, 11 - 14 psi)See LC-37, “System
Check”.
ON*
25 Coolant leaks Visual No leaks See LC-37, “System
Check”.
ON*
26 Thermostat Touch the upper and
lower radiator hosesBoth hoses should be
hotSee LC-40, “Thermostat”
and “Radiator”.
ON*
17 Cooling fan CONSULT-II Operating See Trouble Diagnosis
for DTC P1217, EC-130.
OFF 8 Combustion gas leak Color checker chemi-
cal tester 4 Gas ana-
lyzerNegative —
ON*
39 Coolant temperature
gaugeVisual Gauge less than 3/4
when driving—
Coolant overflow to
reservoir tankVisual No overflow during driv-
ing and idlingSee LC-43, “Changing
Engine Coolant”.
OFF*
410 Coolant return from
reservoir tank to radia-
torVisual Should be initial level in
reservoir tankSee LC-43, “REFILLING
ENGINE COOLANT”.
OFF 11 Cylinder head Straight gauge feeler
gauge0.1mm (0.004 in) Maxi-
mum distortion (warping)See EM-48, “Inspection”.
12 Cylinder block and pis-
tonsVisual No scuffing on cylinder
walls or pistonSee EM-70, “Inspection”.
*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-46, “OVERHEATING CAUSE ANALYSIS”.
DTC P1217 OVER HEATYD
Diagnostic Procedure (Cont’d)
EC-144

SEF437Y
DescriptionNJEC0727SYSTEM DESCRIPTIONNJEC0727S01The ECM and the electronic control fuel injection pump control unit
(abbreviated as the injection pump control unit) perform the real
time communication (signal exchange).
The ECM transmits the signals of the target fuel injection amount,
target fuel injection timing, and engine speed, etc., and receives
the signals of the pump speed and fuel temperature, etc. from the
injection pump control unit.
By those signals, the injection pump controls the optimum fuel
injection amount and injection timing of the spill valve and timing
control valve.
Injection pump control unit has an on board diagnostic system,
which detects malfunctions related to sensors or actuators built-into
electronic control fuel injection pump. These malfunction informa-
tion are transferred through the line (circuit) from injection pump
control unit to ECM.
FUEL INJECTION AMOUNT CONTROLNJEC0727S02In accordance with the target fuel injection amount signal from the
ECM, the injection amount is controlled by controlling the spill valve
in the injection pump and by changing the needle opening time.
FUEL INJECTION TIMING CONTROLNJEC0727S03Based on the target fuel injection timing signal from the ECM, the
injection timing is controlled in accordance with the timer spring by
performing the duty control of the timing control valve in the injec-
tion pump and by adjusting the pressure of the timer piston high
pressure chamber.
FUEL TEMPERATURE SENSORNJEC0727S04The sensor detects the fuel temperature in the injection pump and
calibrates the injection amount change by the fuel temperature.
CAM RING POSITION SENSORNJEC0727S05The sensor detects the passing of the protrusion on the sensor
wheel in the injection pump by the semiconductor magnetic resis-
tance element sensor. The cam ring position sensor synchronizes
with the cam ring, and detects the actual advance amount. The
injection pump control unit measures the injection pump revolution
by the signal of the cam ring position sensor.
CONSULT-II Reference Value in Data Monitor
Mode
NJEC0728Remarks: Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
FUEL TEMP SEN Engine: After warming up More than 40°C (104°F)
SPILL/V Engine: After warming up, idle the engine. Approx. 12 - 13°CA
INT/A VOLUME Engine: After warming up, idle the engine. Approx. 150 - 450 mg/st
F/CUT SIGNAL Engine: After warming up Idle ON
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DTC P1241 P7·F/INJ TIMG FBYD
Description
EC-145

SEF437Y
DescriptionNJEC0714SYSTEM DESCRIPTIONNJEC0714S01The ECM and the electronic control fuel injection pump control unit
(abbreviated as the injection pump control unit) perform the real
time communication (signal exchange).
The ECM transmits the signals of the target fuel injection amount,
target fuel injection timing, and engine speed, etc., and receives
the signals of the pump speed and fuel temperature, etc. from the
injection pump control unit.
By those signals, the injection pump controls the optimum fuel
injection amount and injection timing of the spill valve and timing
control valve.
Injection pump control unit has an on board diagnostic system,
which detects malfunctions related to sensors or actuators built-into
electronic control fuel injection pump. These malfunction informa-
tion are transferred through the line (circuit) from injection pump
control unit to ECM.
FUEL INJECTION AMOUNT CONTROLNJEC0714S02In accordance with the target fuel injection amount signal from the
ECM, the injection amount is controlled by controlling the spill valve
in the injection pump and by changing the needle opening time.
FUEL INJECTION TIMING CONTROLNJEC0714S03Based on the target fuel injection timing signal from the ECM, the
injection timing is controlled in accordance with the timer spring by
performing the duty control of the timing control valve in the injec-
tion pump and by adjusting the pressure of the timer piston high
pressure chamber.
FUEL TEMPERATURE SENSORNJEC0714S04The sensor detects the fuel temperature in the injection pump and
calibrates the injection amount change by the fuel temperature.
CAM RING POSITION SENSORNJEC0714S05The sensor detects the passing of the protrusion on the sensor
wheel in the injection pump by the semiconductor magnetic resis-
tance element sensor. The cam ring position sensor synchronizes
with the cam ring, and detects the actual advance amount. The
injection pump control unit measures the injection pump revolution
by the signal of the cam ring position sensor.
CONSULT-II Reference Value in Data Monitor
Mode
NJEC0715Remarks: Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
FUEL TEMP SEN Engine: After warming up More than 40°C (104°F)
SPILL/V Engine: After warming up, idle the engine. Approx. 12 - 13°CA
INT/A VOLUME Engine: After warming up, idle the engine. Approx. 150 - 450 mg/st
F/CUT SIGNAL Engine: After warming up Idle ON
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DTC P1251 P4·SPILL/V CIRCYD
Description
EC-151

SEF437Y
DescriptionNJEC0700SYSTEM DESCRIPTIONNJEC0700S01The ECM and the electronic control fuel injection pump control unit
(abbreviated as the injection pump control unit) perform the real
time communication (signal exchange).
The ECM transmits the signals of the target fuel injection amount,
target fuel injection timing, and engine speed, etc., and receives
the signals of the pump speed and fuel temperature, etc. from the
injection pump control unit.
By those signals, the injection pump controls the optimum fuel
injection amount and injection timing of the spill valve and timing
control valve.
Injection pump control unit has an on board diagnostic system,
which detects malfunctions related to sensors or actuators built-into
electronic control fuel injection pump. These malfunction informa-
tion are transferred through the line (circuit) from injection pump
control unit to ECM.
FUEL INJECTION AMOUNT CONTROLNJEC0700S02In accordance with the target fuel injection amount signal from the
ECM, the injection amount is controlled by controlling the spill valve
in the injection pump and by changing the needle opening time.
FUEL INJECTION TIMING CONTROLNJEC0700S03Based on the target fuel injection timing signal from the ECM, the
injection timing is controlled in accordance with the timer spring by
performing the duty control of the timing control valve in the injec-
tion pump and by adjusting the pressure of the timer piston high
pressure chamber.
FUEL TEMPERATURE SENSORNJEC0700S04The sensor detects the fuel temperature in the injection pump and
calibrates the injection amount change by the fuel temperature.
CAM RING POSITION SENSORNJEC0700S05The sensor detects the passing of the protrusion on the sensor
wheel in the injection pump by the semiconductor magnetic resis-
tance element sensor. The cam ring position sensor synchronizes
with the cam ring, and detects the actual advance amount. The
injection pump control unit measures the injection pump revolution
by the signal of the cam ring position sensor.
CONSULT-II Reference Value in Data Monitor
Mode
NJEC0701Remarks: Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
FUEL TEMP SEN Engine: After warming up More than 40°C (104°F)
SPILL/V Engine: After warming up, idle the engine. Approx. 12 - 13°CA
INT/A VOLUME Engine: After warming up, idle the engine. Approx. 150 - 450 mg/st
F/CUT SIGNAL Engine: After warming up Idle ON
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DTC P1337 P2·DTC PULSE SIGYD
Description
EC-157