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FUEL INJECTOR
EC-1509
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Wiring Diagram
INFOID:0000000004500411
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-III.
CAUTION: BBWA3003E
Page 2866 of 4331
![NISSAN LATIO 2009 Service Repair Manual EC-1510< SERVICE INFOMATION >
[MR TYPE 2]
FUEL INJECTOR
Do not use ECM ground terminals when measuring in put/output voltage. Doing so may result in dam-
age to the ECMs transistor. Use a ground ot h NISSAN LATIO 2009 Service Repair Manual EC-1510< SERVICE INFOMATION >
[MR TYPE 2]
FUEL INJECTOR
Do not use ECM ground terminals when measuring in put/output voltage. Doing so may result in dam-
age to the ECMs transistor. Use a ground ot h](/manual-img/5/57359/w960_57359-2865.png)
EC-1510< SERVICE INFOMATION >
[MR TYPE 2]
FUEL INJECTOR
Do not use ECM ground terminals when measuring in put/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground ot her than ECM terminals, such as the ground.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
Diagnosis Procedure INFOID:00000000045004121.
INSPECTION START
Turn ignition switch to START.
Is any cylinder ignited?
Yes or No Yes >> GO TO 2.
No >> GO TO 3. 2.
CHECK OVERALL FUNCTION
With CONSULT-III
1. Start engine.
2. Perform “POWER BALANCE” in “A CTIVE TEST” mode with CONSULT-III.
3. Make sure that each circuit produces a momentary engine speed drop.
Without CONSULT-III
1. Start engine.
2. Listen to each fuel injector operating sound.
OK or NG OK >>
INSPECTION END
NG >> GO TO 3. TERMI-
NAL
NO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage)
25
29
30
31 V
Y
O
L Fuel injector No. 4
Fuel injector No. 3
Fuel injector No. 2
Fuel injector No. 1 [Engine is running]
• Warm-up condition
• Idle speed NOTE:
The pulse cycle changes depending on rpm at
idle BATTERY VOLTAGE
(11 - 14V)
[Engine is running]
• Warm-up condition
• Engine speed: 2,000 rpm BATTERY VOLTAGE
(11 - 14V) PBIB0529E
PBIA4943J
Clicking noise should be heard.
PBIB3332E
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![NISSAN LATIO 2009 Service Repair Manual FUEL INJECTOR
EC-1511
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CHECK FUEL INJECTOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect fuel injector (1) harnes NISSAN LATIO 2009 Service Repair Manual FUEL INJECTOR
EC-1511
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CHECK FUEL INJECTOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect fuel injector (1) harnes](/manual-img/5/57359/w960_57359-2866.png)
FUEL INJECTOR
EC-1511
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CHECK FUEL INJECTOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect fuel injector (1) harness connector.
3. Turn ignition switch ON.
4. Check voltage between fuel injector terminal 1 and ground with CONSULT-III or tester.
OK or NG OK >> GO TO 5.
NG >> GO TO 4. 4.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors E8, F8
• IPDM E/R harness connector E45
• 10A fuse
• 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. 5.
CHECK FUEL INJECTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between fuel injector terminal 2 and ECM terminals 25, 29, 30, 31. Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG OK >> GO TO 6.
NG >> Repair open circuit or short to ground or short to power in harness or connectors. 6.
CHECK FUEL INJECTOR
Refer to EC-1512, " Component Inspection " .
OK or NG OK >> GO TO 7.
NG >> Replace fuel injector. 7.
CHECK INTERMITTENT INCIDENT
Refer to EC-1138 . PBIA9870J
Voltage: Battery voltage
PBIB0582E
Continuity should exist.
Page 2868 of 4331
EC-1512< SERVICE INFOMATION >
[MR TYPE 2]
FUEL INJECTOR
>> INSPECTION END
Component Inspection INFOID:0000000004500413
FUEL INJECTOR
1. Disconnect fuel injector harness connector.
2. Check resistance between terminals as shown in the figure.
3. If NG, replace fuel injector.
Removal and Installation INFOID:0000000004500414
FUEL INJECTOR
Refer to EM-156 .
Resistance: 11.1 - 14.5
Ω [at 10 - 60 °C (50 - 140 °F)] PBIA9579J
Page 2869 of 4331
![NISSAN LATIO 2009 Service Repair Manual FUEL PUMP
EC-1513
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[MR TYPE 2] C
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FUEL PUMP
Description INFOID:0000000004500415
SYSTEM DESCRIPTION
*: ECM determines the start signal status by the s NISSAN LATIO 2009 Service Repair Manual FUEL PUMP
EC-1513
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FUEL PUMP
Description INFOID:0000000004500415
SYSTEM DESCRIPTION
*: ECM determines the start signal status by the s](/manual-img/5/57359/w960_57359-2868.png)
FUEL PUMP
EC-1513
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FUEL PUMP
Description INFOID:0000000004500415
SYSTEM DESCRIPTION
*: 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
start ability. If the ECM receives a engine speed signal from the crankshaft position sensor (POS) and cam-
shaft position sensor (PHASE), it knows that the engi ne is rotating, and causes the pump to operate. If the
engine speed signal is not received when the ignition s witch 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 rela y, which in turn controls the fuel pump.
COMPONENT DESCRIPTION A turbine type design fuel pump is used in the fuel tank.
• Fuel level sensor unit and fuel pump (1)
• Fuel pressure regulator (2)
• Fuel level sensor (3)
• Fuel tank temperature sensor (4)
CONSULT-III Reference Val ue in Data Monitor Mode INFOID:0000000004500416
Specification data are reference values. Sensor Input Signal to ECM ECM Function Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE) Engine speed*
Fuel pump control Fuel pump relay
Battery Battery voltage* Condition Fuel pump operation
Ignition switch is turned to ON Operates for 1 second
Engine running and cranking Operates
Engine: Stopped Stops in 1.5 seconds
Except as shown above Stops BBIA0704E
MONITOR ITEM CONDITION SPECIFICATION
FUEL PUMP RLY • For 1 second after turning ignition switch ON
• Engine running or cranking ON
• Except above conditions OFF
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![NISSAN LATIO 2009 Service Repair Manual FUEL PUMP
EC-1515
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[MR TYPE 2] C
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Diagnosis Procedure
INFOID:00000000045004181.
CHECK OVERALL FUNCTION
1. Turn ignition switch ON.
2. Pinch fuel feed NISSAN LATIO 2009 Service Repair Manual FUEL PUMP
EC-1515
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[MR TYPE 2] C
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Diagnosis Procedure
INFOID:00000000045004181.
CHECK OVERALL FUNCTION
1. Turn ignition switch ON.
2. Pinch fuel feed](/manual-img/5/57359/w960_57359-2870.png)
FUEL PUMP
EC-1515
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Diagnosis Procedure
INFOID:00000000045004181.
CHECK OVERALL FUNCTION
1. Turn ignition switch ON.
2. Pinch fuel feed hose (1) with two fingers.
- Illustration shows the view with intake air duct removed.
OK or NG OK >>
INSPECTION END
NG >> GO TO 2. 2.
CHECK FUEL PUMP POWER SUPPLY CIRCUIT-I
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Turn ignition switch ON.
4. Check voltage between ECM terminal 23 and ground with CON-
SULT-III or tester.
OK or NG OK >> GO TO 5.
NG >> GO TO 3. 3.
CHECK FUEL PUMP POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R harness connector E46.
3. Turn ignition switch ON.
4. Check voltage between IPDM E/R terminal 47 and ground with
CONSULT-III or tester.
OK or NG OK >> GO TO 4.
NG >> GO TO 11.
TERMI-
NAL NO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage)
23 GR Fuel pump relay [Ignition switch: ON]
• For 1 second after turning ignition switch ON
[Engine is running] 0 - 1.0V
[Ignition switch: ON]
• More than 1 second after turning ignition
switch ON BATTERY VOLTAGE
(11 - 14V) Fuel pressure pulsation should
be felt on the fuel feed
hose for 1 second after ignition switch is turned ON. BBIA0712E
Voltage: Battery voltage
PBIA9573J
Voltage: Battery voltage
PBIB3319E
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![NISSAN LATIO 2009 Service Repair Manual EC-1516< SERVICE INFOMATION >
[MR TYPE 2]
FUEL PUMP 4.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors E8, F8
• Harness for open or short between IPDM E/R and ECM
>> Repair op NISSAN LATIO 2009 Service Repair Manual EC-1516< SERVICE INFOMATION >
[MR TYPE 2]
FUEL PUMP 4.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors E8, F8
• Harness for open or short between IPDM E/R and ECM
>> Repair op](/manual-img/5/57359/w960_57359-2871.png)
EC-1516< SERVICE INFOMATION >
[MR TYPE 2]
FUEL PUMP 4.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors E8, F8
• Harness for open or short between IPDM E/R and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors. 5.
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 con- nector (1).
- Illustration shows the view with inspection hole cover removed.
4. Turn ignition switch ON.
5. Check voltage between “fuel level sensor unit and fuel pump” terminal 1 and ground with CONSULT-III or tester.
OK or NG OK >> GO TO 9.
NG >> GO TO 6. 6.
CHECK 15A FUSE
1. Turn ignition switch OFF.
2. Disconnect 15A fuse.
3. Check 15A fuse.
OK or NG OK >> GO TO 7.
NG >> Replace fuse. 7.
CHECK FUEL PUMP POWER SUPPLY CIRCUIT-IV
1. Disconnect IPDM E/R harness connector E45.
2. Check harness continuity between IPDM E/R terminal 36 and “fuel level sensor unit and fuel pump” termi-
nal 1. Refer to Wiring Diagram.
3. Also check harness for short to ground and short to power.
OK or NG OK >> GO TO 11.
NG >> GO TO 8. 8.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors M69, E7
• Harness connectors M12, B101 BBIA0702E
Voltage: Battery voltage should exist for 1 second
after ignition switch is turned ON. PBIB0795E
Continuity should exist.