NISSAN LATIO 2009 Service Repair Manual

MULTIPORT FUEL INJECTION SYSTEM
EC-45
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Component Parts Location
INFOID:0000000004780012
1. Ignition coil (with power transistor) and spark plug 2. Intake valve timing control solenoid
valve 3. Refrigerant pressure sensor
4. Knock sensor 5. Fuel injector 6. Cooling fan motor
7. Camshaft position sensor (PHASE) 8. IPDM E/R 9. ECM
10. Mass air flow sensor (with intake air temperature sensor) 11. Engine coolant temperature sensor 12. Electric throttle control actuator
(with built in throttle position sensor
and throttle control motor)
13. EVAP canister purge volume control solenoid valve PBIB2939E

EC-46< FUNCTION DIAGNOSIS >
[HR16DE]
MULTIPORT FUEL INJECTION SYSTEM
1. Mass air flow sensor (with intake air temperature sensor) 2. Engine coolant temperature sensor 3. Electric throttle control actuator
4. Camshaft position sensor (PHASE) 5. Ignition coil (with power transistor) 6. Fuel injector
7. EVAP canister purge volume control solenoid valve
Vehicle front PBIB2940E

MULTIPORT FUEL INJECTION SYSTEM
EC-47
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1. ECM harness connectors 2. ECM 3. IPDM E/R
4. Fuel pump fuse (15A) 5. Intake valve timing control solenoid valve6. Knock sensor
7. Refrigerant pressure sensor 8. PCV valve Vehicle front PBIB2941E

EC-48< FUNCTION DIAGNOSIS >
[HR16DE]
MULTIPORT FUEL INJECTION SYSTEM
1. Air fuel ratio (A/F) sensor 1 2. Three way catalyst (Manifold) 3. Heated oxygen sensor 2
4. Three way catalyst (Under flloor) 5. Muffler
Vehicle front
1. Exhaust manifold 2. Air fuel ratio (A/F) sensor 1 3. Heated oxygen sensor 2
4. Heated oxygen sensor 2 harness connector
Vehicle front JMBIA2192ZZ
PBIB2943E

MULTIPORT FUEL INJECTION SYSTEM
EC-49
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Component Description INFOID:0000000004780013
1. Cooling fan motor harness connec-
tor 2. Crankshaft position sensor 3. Stop lamp switch
4. Brake pedal 5. Accelerator pedal position sensor harness connector6. Accelerator pedal position sensor
7. Accelerator pedal 8. Fuel level sensor unit and fuel pump harness connector (view with in-
spection hole cover removed) 9. Fuel pressure regulator
10. Fuel pump AWBIA0044ZZ
Component Reference
A/F sensor 1 EC-182, " Description "
Accelerator pedal position sensor
EC-399, " Description "
Camshaft position sensor (PHASE)
EC-268, " Description "
Crankshaft position sensor (POS)
EC-263, " Description "

Description "
Fuel injector
EC-430, " Description "
Heated oxygen sensor 2
EC-204, " Description "
Intake air temperature sensor
EC-162, " Description "
Knock sensor
EC-259, " Description "
Mass air flow sensor
EC-148, " Description "
Park/neutral position switch
EC-362, " Description "
Throttle position sensor
EC-171, " Description "Component Reference

EC
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ELECTRIC IGNITION SYSTEM
System Diagram INFOID:0000000004780014
System Description INFOID:0000000004780015
INPUT/OUTPUT SIGNAL CHART
*1: This signal is sent to the ECM via the CAN communication line.
*2: ECM determines the start signal status by the signals of engine speed and battery voltage.
SYSTEM DESCRIPTION Ignition order: 1 - 3 - 4 - 2
The ignition timing is controlled by the ECM to maintain the best air-fuel ratio for every running condition of the
engine. The ignition timing data is stored in the ECM.
The ECM receives information such as the injecti on pulse width and camshaft position sensor (PHASE) sig-
nal. Computing this information, ignition si gnals are transmitted to the power transistor.
During the following conditions, the ignition timing is revi sed by the ECM according to the other data stored in
the ECM.
• At starting
• During warm-up
• At idle
• At low battery voltage
• During acceleration

EC-52< FUNCTION DIAGNOSIS >
[HR16DE]
ELECTRIC IGNITION SYSTEM
The knock sensor retard system is designed only for emergencies. The basic ignition timing is programmed
within the anti-knocking zone, if recommended fuel is used under dry conditions. The retard system does not
operate under normal driving conditions. If engine knocking occurs, the knock sensor monitors the condition.
The signal is transmitted to the ECM. The ECM retards the ignition timing to eliminate the knocking condition.
Component Parts Location INFOID:0000000004780016
1. Ignition coil (with power transistor) and spark plug 2. Intake valve timing control solenoid
valve 3. Refrigerant pressure sensor
4. Knock sensor 5. Fuel injector 6. Cooling fan motor
7. Camshaft position sensor (PHASE) 8. IPDM E/R 9. ECM
10. Mass air flow sensor (with intake air temperature sensor) 11. Engine coolant temperature sensor 12. Electric throttle control actuator
(with built in throttle position sensor
and throttle control motor)
13. EVAP canister purge volume control solenoid valve PBIB2939E

ELECTRIC IGNITION SYSTEM
EC-53
< FUNCTION DIAGNOSIS >
[HR16DE] C
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1. Mass air flow sensor
(with intake air temperature sensor) 2. Engine coolant temperature sensor 3. Electric throttle control actuator
4. Camshaft position sensor (PHASE) 5. Ignition coil (with power transistor) 6. Fuel injector
7. EVAP canister purge volume control solenoid valve
Vehicle front PBIB2940E

EC-54< FUNCTION DIAGNOSIS >
[HR16DE]
ELECTRIC IGNITION SYSTEM
1. ECM harness connectors 2. ECM 3. IPDM E/R
4. Fuel pump fuse (15A) 5. Intake valve timing control solenoid valve6. Knock sensor
7. Refrigerant pressure sensor 8. PCV valve Vehicle front PBIB2941E