Engine Control NISSAN TIIDA 2007 Service Repair Manual

COOLING FAN
EC-307
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COOLING FAN
DescriptionINFOID:0000000001677297
Cooling fan operates at each speed when the current flows in the cooling fan motor as follows.
Refer to EC-70, "
System Diagram" for cooling fan operation.
Component Function CheckINFOID:0000000001677298
1.CHECK COOLING FAN LOW SPEED FUNCTION
With CONSULT-III
1. Turn ignition switch ON.
2. Perform “COOLING FAN” in “ACTIVE TEST” mode with CONSULT-III and touch “LOW” on the CON-
SULT-III screen.
3. Make sure that cooling fans operates at low speed.
Without CONSULT-III
1. Start engine and let it idle.
2. Turn air conditioner switch and blower fan switch ON.
3. Make sure that cooling fan operates at low speed.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Check cooling fan low speed control circuit. Refer to EC-307, "
Diagnosis Procedure".
2.CHECK COOLING FAN HIGH SPEED FUNCTION
With CONSULT-III
1. Touch “HI” on the CONSULT-III screen.
2. Make sure that cooling fans operates at higher speed than low speed.
Without CONSULT-III
1. Perform IPDM E/R auto active test and check cooling fan motors operation.
2. Make sure that cooling fan operates at high speed.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Check cooling fan high speed control circuit. Refer to EC-307, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001677299
1.CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R harness connector.
3. Check the voltage between IPDM E/R harness connector and ground.
Is the inspection result normal?
YES-2 >> With A/C models: GO TO 3.
YES-2 >> Without A/C models: GO TO 5.
NO >> GO TO 2.
2.DETECT MALFUNCTIONING PART
Check the following.
 50A fusible link (letter J) (with A/C models)
 40A fusible link (letter J) (without A/C models)
 Harness for open or short between IPDM E/R and battery
IPDM E/R
Ground Continuity
Connector Terminal
E44 22 Ground Existed

FUEL INJECTOR
EC-313
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FUEL INJECTOR
DescriptionINFOID:0000000001671099
The fuel injector is a small, precise solenoid valve. When the ECM
supplies a ground to the fuel injector circuit, the coil in the fuel injec-
tor is energized. The energized coil pulls the ball valve back and
allows fuel to flow through the fuel injector into the intake manifold.
The amount of fuel injected depends upon the injection pulse dura-
tion. Pulse duration is the length of time the fuel injector remains
open. The ECM controls the injection pulse duration based on
engine fuel needs.
Component Function CheckINFOID:0000000001671100
1.INSPECTION START
Turn ignition switch to START.
Is any cylinder ignited?
YES >> GO TO 2.
NO >> Go to EC-313, "
Diagnosis Procedure".
2.CHECK FUEL INJECTOR FUNCTION
With CONSULT-III
1. Start engine.
2. Perform “POWER BALANCE” in “ACTIVE TEST” mode with CONSULT-III.
3. Make sure that each circuit produces a momentary engine speed drop.
Without CONSULT-III
1. Let engine idle.
2. Listen to each fuel injector operating sound.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-313, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001671101
1.CHECK FUEL INJECTOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect fuel injector harness connector.
3. Turn ignition switch ON.
4. Check the voltage between fuel injector harness connector and ground.
PBIA9664J
Clicking noise should be heard.
PBIB3332E

EC-316
< COMPONENT DIAGNOSIS >[HR16DE (WITH EURO-OBD)]
FUEL PUMP
FUEL PUMP
DescriptionINFOID:0000000001671103
*: ECM determines the start signal status by the signals of engine speed and battery voltage.
The ECM activates the fuel pump for several seconds after the ignition switch is turned ON to improve engine
startability. If the ECM receives a engine speed signal from the camshaft position sensor (PHASE), it knows
that the engine is rotating, and causes the pump to operate. If the engine speed signal is not received when
the ignition switch is ON, the engine stalls. The ECM stops pump operation and prevents battery discharging,
thereby improving safety. The ECM does not directly drive the fuel pump. It controls the ON/OFF fuel pump
relay, which in turn controls the fuel pump.
Component Function CheckINFOID:0000000001671104
1.CHECK FUEL PUMP FUNCTION
1. Turn ignition switch ON.
2. Pinch fuel feed hose with two fingers.
Is the inspection result normal?
YES >> INSPECTION END
NO >>EC-316, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001671105
1.CHECK FUEL PUMP POWER SUPPLY CIRCUIT-I
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Turn ignition switch ON.
4. Check the voltage between ECM harness connector terminals as follows.
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 2.
2.CHECK FUEL PUMP POWER SUPPLY CIRCUIT-II
Sensor Input signal to ECM ECM Function Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)Engine speed*
Fuel pump controlFuel pump relay
↓
Fuel pump
Battery Battery voltage*
Condition Fuel pump operation
Ignition switch is turned to ON. Operates for 1 second.
Engine running and crankingOperates.
When engine is stopped Stops in 1.5 seconds.
Except as shown aboveStops.
Fuel pressure pulsation should be felt on the fuel feed
hose for 1 second after ignition switch is turned ON.
ALBIA0276ZZ
(+) (–)
Voltag e
Connector Terminal Connector Terminal
F10 23 E16 108 Battery voltage

EC-326
< COMPONENT DIAGNOSIS >[HR16DE (WITH EURO-OBD)]
REFRIGERANT PRESSURE SENSOR
REFRIGERANT PRESSURE SENSOR
DescriptionINFOID:0000000001671117
The refrigerant pressure sensor is installed at the condenser of the air conditioner system. The sensor uses an
electrostatic volume pressure transducer to convert refrigerant pressure to voltage. The voltage signal is sent
to ECM, and ECM controls cooling fan system.
Component Function CheckINFOID:0000000001671118
1.CHECK REFRIGERANT PRESSURE SENSOR OVERALL FUNCTION
1. Start engine and warm it up to normal operating temperature.
2. Turn A/C switch and blower fan switch ON.
3. Check the voltage between ECM harness connector terminals as follows.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-326, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001671119
1.CHECK GROUND CONNECTION
1. Turn A/C switch and blower fan switch OFF.
2. Stop engine.
3. Turn ignition switch OFF.
4. Check ground connection E15. Refer to Ground Inspection in GI-58, "
Circuit Inspection".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace ground connection.
2.CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT
1. Disconnect refrigerant pressure sensor harness connector.
2. Turn ignition switch ON.
3. Check the voltage between refrigerant pressure sensor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 3.
PBIB2657E
(+) (–)
Voltage
Connector Terminal Connector Terminal
F1141
(Refrigerant pressure sensor signal)F11 48 1.0 - 4.0V
Refrigerant pressure sensor
Ground Voltage
Connector Terminal
E17 3 Ground Approx. 5V

ECM
EC-331
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*: Accelerator pedal position sensor 2 signal and throttle position sensor 2 signal are converted by ECM internally. Thus, they differ from
ECM terminals voltage signal.
TERMINAL LAYOUT
PHYSICAL VALUES
NOTE:
 ECM is located in the engine room left side near battery.
 Specification data are reference values and are measured between each terminal and ground.
 Pulse signal is measured by CONSULT-III.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECMs transistor. Use a ground other than ECM terminals, such as the ground.
VHCL SPD CUT  Ignition switch: ON NON
LO SPEED CUT  Ignition switch: ON NON
AT OD MONITOR  Ignition switch: ON OFF
AT OD CANCEL  Ignition switch: ON OFF
CRUISE LAMP  Ignition switch: ONMAIN switch: Pressed at the 1st time →
at the 2nd timeON → OFF
SET LAMP MAIN switch: ON
 When vehicle speed: Between 40
km/h (25 MPH) and 153 km/h (95
MPH)ASCD: Operating ON
ASCD: Not operating OFF Monitor Item Condition Values/Status
PBIA9221J
Terminal No.
Wire
colorDescription
ConditionVa l u e
(Approx.)
+ -– Signal nameInput/
Output
1GroundL/WThrottle control motor
(Open)Output[Ignition switch: ON]
 Engine stopped
 Shift lever: D (A/T) or 1st (M/
T)
 Accelerator pedal: Fully de-
pressed3.2V
2GroundR/YThrottle control motor relay
power supplyInput [Ignition switch: ON]BATTERY VOLTAGE
(11 - 14V)
PBIA8150J

EC-332
< ECU DIAGNOSIS >[HR16DE (WITH EURO-OBD)]
ECM
3GroundLG/RHeated oxygen sensor 1
heaterOutput[Engine is running]
 Warm up condition
 Engine speed: Below 3,600
rpmApproximately 3.2V
[Engine is running]
 Warm-up condition
 Idle speed
[Engine is running]
 Engine speed: Above 3,600
rpmBATTERY VOLTAGE (11 - 14V)
4GroundPThrottle control motor
(Close)Output[Ignition switch: ON]
 Engine stopped
 Shift lever: D (A/T) or 1st (M/
T)
 Accelerator pedal: Fully re-
leased0 - 14V
5GroundRHeated oxygen sensor 2
heaterOutput[Engine is running]
 Engine speed: Below 3,900
rpm after the following con-
ditions are met
- Engine: after warming up
- Keeping the engine speed
between 3,500 and 4,000
rpm for 1 minute and at idle
for 1 minute under no load10V
[Ignition switch: ON]
 Engine stopped
[Engine is running]
 Engine speed: Above 3,900
rpmBATTERY VOLTAGE
(11 - 14V)
9GroundW/BEVAP canister purge volume
control solenoid valveOutput[Engine is running]
 Idle speedBATTERY VOLTAGE
(11 - 14V)
[Engine is running]
 Engine speed: About 2,000
rpm (More than 100 sec-
onds after starting engine.)BATTERY VOLTAGE
(11 - 14V)
10
11GroundB
B/WECM ground —[Engine is running]
 Idle speedBody ground Te r m i n a l N o .
Wire
colorDescription
ConditionVa l u e
(Approx.)
+ -– Signal nameInput/
OutputPBIA8148J
PBIA8149J
PBIA8148J
PBIB0050E
PBIB0520E

ECM
EC-333
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P O15 Ground G/L Throttle control motor relay Output[Ignition switch: OFF]BATTERY VOLTAGE
(11 - 14V)
[Ignition switch: ON] 0 - 1.0V
17
18
21
22GroundL/Y
BR/Y
R/G
SBIgnition signal No. 1
Ignition signal No. 2
Ignition signal No. 4
Ignition signal No. 3Output[Engine is running]
 Warm-up condition
 Idle speed
NOTE:
The pulse cycle changes de-
pending on rpm at idle0 - 0.3V
[Engine is running]
 Warm-up condition
 Engine speed: 2,500 rpm0.2 - 0.5V
23 Ground B/O Fuel pump relay Output[Ignition switch: ON]
 For 1 second after turning
ignition switch ON
[Engine is running]0 - 1.0V
[Ignition switch: ON]
 More than a few seconds af-
ter turning ignition switch
ONBATTERY VOLTAGE
(11 - 14V)
25
29
30
31GroundR/O
Y
O
LFuel injector No. 4
Fuel injector No. 3
Fuel injector No. 2
Fuel injector No. 1Output[Engine is running]
 Warm-up condition
 Idle speed
NOTE:
The pulse cycle changes de-
pending on rpm at idleBATTERY VOLTAGE
(11 - 14V)
[Engine is running]
 Warm-up condition
 Engine speed: 2,000 rpmBATTERY VOLTAGE
(11 - 14V)
32 Ground Y/LECM relay
(Self shut-off)Output[Engine is running]
[Ignition switch: OFF]
 A few seconds after turning
ignition switch OFF0 - 1.0V
[Ignition switch: OFF]
 More than a few seconds af-
ter turning ignition switch
OFFBATTERY VOLTAGE
(11 - 14V) Terminal No.
Wire
colorDescription
ConditionVa l u e
(Approx.)
+ -– Signal nameInput/
Output
PBIA9265J
PBIA9266J
PBIB0529E
PBIA4943J

EC-336
< ECU DIAGNOSIS >[HR16DE (WITH EURO-OBD)]
ECM
65 Ground GCamshaft position sensor
(PHASE)Input[Engine is running]
 Warm-up condition
 Idle speed
NOTE:
The pulse cycle changes de-
pending on rpm at idle0 - 1.0V
[Engine is running]
 Engine speed is 2,000 rpm0 - 1.0V
69 Ground W/B Neutral position switch Input[Ignition switch: ON]
 Shift lever: P or N (A/T),
Neutral (M/T)BATTERY VOLTAGE
(11 - 14V)
[Ignition switch: ON]
 Shift lever: Except above
position0V
72 Ground V/RSensor power supply
(Throttle position sensor)— [Ignition switch: ON] 5V
73 Ground Y/RIntake valve timing control
solenoid valveOutput[Engine is running]
 Warm-up condition
 Idle speedBATTERY VOLTAGE
(11 - 14V)
[Engine is running]
 Warm-up condition
 Engine speed: 2,000rpm7 - 10V
74 Ground Y/WSensor power supply
(Refrigerant pressure sen-
sor)— [Ignition switch: ON] 5V
75 Ground L/WSensor power supply
[Crankshaft position sensor
(POS)]— [Ignition switch: ON] 5V
78 Ground Y/VSensor power supply
[Camshaft position sensor
(PHASE)]— [Ignition switch: ON] 5V
83 Ground P CAN communication lineInput/
Output——
84 Ground L CAN communication lineInput/
Output——
88 Ground O Data link connectorInput/
Output[Ignition switch: ON]
 CONSULT-III or GST: Dis-
connected2.7V Te r m i n a l N o .
Wire
colorDescription
ConditionVa l u e
(Approx.)
+ -– Signal nameInput/
OutputMBIB1455E
MBIB1456E
PBIA4937J

ECM
EC-339
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Wiring Diagram - ENGINE CONTROL SYSTEM -INFOID:0000000001161406
ALBWA0175GB

ECM
EC-359
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DTC RELATED ITEM
Engine operating condi-
tion in fail-safe modeDetected items RemarksReference
page
Engine speed will not
rise more than 2,500 rpm
due to the fuel cutMalfunction indicator
lamp circuitWhen there is an open circuit on MI circuit, the ECM cannot warn the
driver by lighting up MI when there is malfunction on engine control
system.
Therefore, when electrical controlled throttle and part of ECM related
diagnoses are continuously detected as NG for 5 trips, ECM warns the
driver that engine control system malfunctions and MI circuit is open by
means of operating fail-safe function.
The fail-safe function also operates when above diagnoses except MI
circuit are detected and demands the driver to repair the malfunction.EC-324
DTC No. Detected items Engine operating condition in fail-safe mode
P0011 Intake valve timing control The signal is not energized to the intake valve timing control solenoid valve and the valve
control does not function.
P0102
P0103Mass air flow sensor circuit Engine speed will not rise more than 2,400 rpm due to the fuel cut.
P0117
P0118Engine coolant tempera-
ture sensor circuitEngine coolant temperature will be determined by ECM based on the time after turning
ignition switch ON or START.
CONSULT-III displays the engine coolant temperature decided by ECM.
ConditionEngine coolant temperature decided
(CONSULT-III display)
Just as ignition switch is turned ON
or START40°C (104°F)
More than approx. 4 minutes after
ignition ON or START80°C (176°F)
Except as shown above40 - 80°C (104 - 176°F)
(Depends on the time)
When the fail-safe system for engine coolant temperature sensor is activated, the cooling
fan operates while engine is running.
P0122
P0123
P0222
P0223
P2135Throttle position sensor The ECM controls the electric throttle control actuator in regulating the throttle opening in
order for the idle position to be within +10 degrees.
The ECM regulates the opening speed of the throttle valve to be slower than the normal
condition.
So, the acceleration will be poor.
P0605 ECM (When ECM calculation function is malfunctioning:)
ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
ECM deactivates ASCD operation.
P1121 Electric throttle control ac-
tuator(When electric throttle control actuator does not function properly due to the return spring
malfunction:)
ECM controls the electric throttle actuator by regulating the throttle opening around the
idle position. The engine speed will not rise more than 2,000 rpm.
(When throttle valve opening angle in fail-safe mode is not in specified range:)
ECM controls the electric throttle control actuator by regulating the throttle opening to 20
degrees or less.
(When ECM detects the throttle valve is stuck open:)
While the vehicle is driving, it slows down gradually by fuel cut. After the vehicle stops, the
engine stalls.
The engine can restart in P or N (A/T), Neutral (M/T) position, and engine speed will not
exceed 1,000 rpm or more.
P1122 Electric throttle control
functionECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
P1124
P1126Throttle control motor relay ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.