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EC-972
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COOLING FAN
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace cooling fan motor.
Te r m i n a l s
Operation
(+) (–)
14
Cooling fan operates at
low speed.
23
1 and 2 3 and 4Cooling fan operates at
high speed.
Page 2322 of 5883
![NISSAN TIIDA 2007 Service Repair Manual ELECTRICAL LOAD SIGNAL
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ELECTRICAL LOAD SIGNAL
DescriptionINFOID:0000000001161966
The electrical load signal (Headlamp switch sign NISSAN TIIDA 2007 Service Repair Manual ELECTRICAL LOAD SIGNAL
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DescriptionINFOID:0000000001161966
The electrical load signal (Headlamp switch sign](/manual-img/5/57395/w960_57395-2321.png)
ELECTRICAL LOAD SIGNAL
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ELECTRICAL LOAD SIGNAL
DescriptionINFOID:0000000001161966
The electrical load signal (Headlamp switch signal, rear window defogger switch signal, etc.) is transferred
through the CAN communication line from BCM to ECM via IPDM E/R.
Component Function CheckINFOID:0000000001161967
1.CHECK REAR WINDOW DEFOGGER SWITCH FUNCTION
1. Turn ignition switch ON.
2. Connect CONSULT-III and select “DATA MONITOR” mode.
3. Select “LOAD SIGNAL” and check indication under the following conditions.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Go to EC-973, "
Diagnosis Procedure".
2.CHECK LIGHTING SWITCH FUNCTION
Check “LOAD SIGNAL” indication under the following conditions.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Go to EC-973, "
Diagnosis Procedure".
3.CHECK HEATER FAN CONTROL SWITCH FUNCTION
Select “HEATER FAN SW” and check indication under the following conditions.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-973, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001161968
1.INSPECTION START
Confirm the malfunctioning circuit (rear window defogger, headlamp or heater fan). Refer to EC-973, "
Compo-
nent Function Check".
Which circuit is related to the incident?
Rear window defogger>>GO TO 2
Headlamp>>GO TO 3.
Heater fan>>GO TO 4.
2.CHECK REAR WINDOW DEFOGGER SYSTEM
Refer to DEF-6, "
System Diagram".
Monitor item Condition Indication
LOAD SIGNAL Rear window defogger switchON ON
OFF OFF
Monitor item Condition Indication
LOAD SIGNAL Lighting switchON at 2nd position ON
OFF OFF
Monitor item Condition Indication
HEATER FAN SW Heater fan control switchON ON
OFF OFF
Page 2323 of 5883
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ELECTRICAL LOAD SIGNAL
>> INSPECTION END
3.CHECK HEADLAMP SYSTEM
Refer to EXL-10, "
System Diagram" (XENON TYPE) or EXL-8, "System Diagram" (HALOGEN TYPE).
>> INSPECTION END
4.CHECK HEATER FAN CONTROL SYSTEM
Refer to GI-55, "
Intermittent Incident".
>> INSPECTION END
Page 2324 of 5883
![NISSAN TIIDA 2007 Service Repair Manual FUEL INJECTOR
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DescriptionINFOID:0000000001161969
The fuel injector is a small, precise solenoid valve. When the ECM NISSAN TIIDA 2007 Service Repair Manual FUEL INJECTOR
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DescriptionINFOID:0000000001161969
The fuel injector is a small, precise solenoid valve. When the ECM](/manual-img/5/57395/w960_57395-2323.png)
FUEL INJECTOR
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DescriptionINFOID:0000000001161969
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:0000000001161970
1.INSPECTION START
Turn ignition switch to START.
Is any cylinder ignited?
YES >> GO TO 2.
NO >> Go to EC-975, "
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-975, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001161971
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
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![NISSAN TIIDA 2007 Service Repair Manual EC-976
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FUEL INJECTOR
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.
2.DETECT MALFUNCTIONING PART
Check the following.
Harness connectors F8, E8
10A NISSAN TIIDA 2007 Service Repair Manual EC-976
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FUEL INJECTOR
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.
2.DETECT MALFUNCTIONING PART
Check the following.
Harness connectors F8, E8
10A](/manual-img/5/57395/w960_57395-2324.png)
EC-976
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FUEL INJECTOR
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.
2.DETECT MALFUNCTIONING PART
Check the following.
Harness connectors F8, E8
10A fuse (No. 55)
Harness for open or short between fuel injector and fuse
>> Repair open circuit or short to ground or short to power in harness or connectors.
3.CHECK FUEL INJECTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between fuel injector harness connector and ECM harness connector.
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK FUEL INJECTOR
Refer to EC-976, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 5.
NO >> Replace malfunctioning fuel injector.
5.CHECK INTERMITTENT INCIDENT
Refer to GI-55, "
Intermittent Incident".
>> INSPECTION END
Component InspectionINFOID:0000000001161972
1.CHECK FUEL INJECTOR
1. Turn ignition switch OFF.
2. Disconnect fuel injector harness connector.
3. Check resistance between fuel injector terminals as follows.
Fuel injector
Ground Voltage
Cylinder Connector Terminal
1F17 1
Ground Battery voltage 2F18 1
3F19 1
4F20 1
Fuel injector ECM
Continuity
Cylinder Connector Terminal Connector Terminal
1F17 2
F1031
Existed 2F18 2 30
3F19 2 29
4F20 2 25
Page 2326 of 5883
FUEL INJECTOR
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YES >> INSPECTION END
NO >> Replace malfunctioning fuel injector.
Terminals Resistance [at 10 - 60°C (50 - 140°F)]
1 and 2 11.1 - 14.5Ω
Page 2327 of 5883
![NISSAN TIIDA 2007 Service Repair Manual EC-978
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FUEL PUMP
FUEL PUMP
DescriptionINFOID:0000000001161973
*: ECM determines the start signal status by the signals of engine speed and battery voltage.
The ECM acti NISSAN TIIDA 2007 Service Repair Manual EC-978
< COMPONENT DIAGNOSIS >[MR18DE]
FUEL PUMP
FUEL PUMP
DescriptionINFOID:0000000001161973
*: ECM determines the start signal status by the signals of engine speed and battery voltage.
The ECM acti](/manual-img/5/57395/w960_57395-2326.png)
EC-978
< COMPONENT DIAGNOSIS >[MR18DE]
FUEL PUMP
FUEL PUMP
DescriptionINFOID:0000000001161973
*: 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:0000000001161974
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-978, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001161975
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.
JMBIA0351ZZ
(+) (–)
Voltag e
Connector Terminal Connector Terminal
F10 23 E16 108 Battery voltage
Page 2328 of 5883
![NISSAN TIIDA 2007 Service Repair Manual FUEL PUMP
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1. Turn ignition switch OFF.
2. Disconnect IDPDM E/R harness connector.
3. Check the continuity between IPDM E/R harnes NISSAN TIIDA 2007 Service Repair Manual FUEL PUMP
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1. Turn ignition switch OFF.
2. Disconnect IDPDM E/R harness connector.
3. Check the continuity between IPDM E/R harnes](/manual-img/5/57395/w960_57395-2327.png)
FUEL PUMP
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1. Turn ignition switch OFF.
2. Disconnect IDPDM E/R harness connector.
3. Check the continuity between IPDM E/R harness connector and ECM harness connector.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair open circuit or short to ground or short to power in harness or connectors.
3.DETECT MALFUNCTIONING PART
Check the following.
Harness or connectors E8, F8.
Harness for open or short to ground and short power.
>> Repair harness or connectors.
4.CHECK FUEL PUMP POWER SUPPLY CIRCUIT-III
1. Turn ignition switch OFF.
2. Reconnect all harness connectors disconnected.
3. Disconnect “fuel level sensor unit and fuel pump” harness connector.
4. Turn ignition switch ON.
5. Check voltage between “fuel level sensor unit and fuel pump” harness connector and ground.
Is the inspection result normal?
YES >> GO TO 8.
NO >> GO TO 5.
5.CHECK 10A FUSE
1. Turn ignition switch OFF.
2. Disconnect 15A fuse (No. 48) from IPDM E/R.
3. Check 15A fuse.
Is the inspection result normal?
YES >> GO TO 6.
NO >> Replace fuse.
6.CHECK FUEL PUMP POWER SUPPLY CIRCUIT-IV
1. Disconnect IPDM E/R harness connector.
2. Check the continuity between IPDM E/R harness connector and “fuel level sensor unit and fuel pump”
harness connector.
3. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 10.
ECM IPDM E/R
Continuity
Connector Terminal Connector Terminal
F10 23 E46 47 Existed
Fuel level sensor unit
and fuel pump
Ground Voltage
Connector Terminal
B40 1 GroundBattery voltage should exist 1
second after ignition switch is
turn ON.
IPDM E/RFuel level sensor unit and
fuel pump
Continuity
Connector Terminal Connector Terminal
E45 36 B40 1 Existed