Nissan Altima (L32) 2007-2012 Service Manual: Engine control system
System Diagram
System Description
ECM performs various controls such as fuel injection control and ignition timing control.
Component Parts Location
1. Intake valve timing control solenoid valve
2. Ignition coil (with power transistor) and spark plug
3. Knock sensor, Crankshaft position sensor (POS)
4. Air fuel ratio (A/F) sensor 1
5. Camshaft position sensor (PHASE)
6. Engine coolant temperature sensor
7. Park/neutral position (PNP) switch
8. ECM
9. Refrigerant pressure sensor
10. Battery current sensor
11. IPDM E/R
12. Mass air flow sensor (with intake temperature sensor)
13. EVAP service port
14. Electric throttle control actuator (with built in throttle position sensor and throttle control motor)
15. EVAP canister purge volume control solenoid valve
16. Fuel injector
17. Power steering pressure sensor
1. Battery
2. Fuel pump fuse (15A)
3. IPDM E/R
4. Brake master cylinder
5. Engine ground
6. Air cleaner assembly
7. Mass air flow sensor (with intake air temperature sensor)
8. Radiator hose (upper)
9. Engine coolant temperature sensor
10. Intake air duct
11. Camshaft position sensor (PHASE)
12. Tie rod (RH)
13. Power steering pressure sensor
14. Knock sensor
15. Engine oil cooler
16. Crankshaft position sensor (POS)
17. Drive shaft (RH)
1. Exhaust manifold cover
2. Air fuel ratio (A/F) sensor 1
3. Heated oxygen sensor 2 (This illustration is a view from under vehicle.)
4. Engine oil pan
1. EVAP service port
2. Intake air duct
3. EVAP canister purge volume control solenoid valve
4. Intake manifold collector
5. Park/neutral position (PNP) switch (CVT) (This illustration is view with air cleaner assembly removed.)
6. Park/neutral position (PNP) switch (M/T) (This illustration is view with air cleaner assembly removed.)
7. Intake valve timing control solenoid valve (This illustration is view with engine removed.)
8. Exhaust manifold cover
9. Air fuel ratio (A/F) sensor 1
10. Air fuel ratio (A/F) sensor 1 harness connector
11. Heated oxygen sensor 2 (This illustration is view from under vehicle.)
12. Heated oxygen sensor 2 harness connector (This illustration is view from under vehicle.)
13. Engine oil pan
1. Throttle valve (This illustration is view with intake air duct removed.)
2. Electric throttle control actuator
3. Fuel injector harness connector
4. Condenser-2
5. Radiator hose (upper)
6. Battery
7. ECM
8. Fuel level sensor unit and fuel pump harness connector (This illustration is view with rear seat cushion and inspection hole cover removed.)
9. Fuel level sensor unit and fuel pump assembly
10. Fuel pressure regulator
11. Fuel tank temperature sensor
12. EVAP control system pressure sensor (This illustration is view with rear suspension member removed.)
13. EVAP canister vent control valve (This illustration is view with rear suspension member removed.)
14. EVAP canister (This illustration is view with rear suspension member removed.)
1. No.1 ignition coil
2. Cooling fan motor-1 harness connector
3. Cooling fan motor-2 harness connector
4. Refrigerant pressure sensor
5. Accelerator pedal position sensor
6. ASCD brake switch
7. Stop lamp switch
8. Brake pedal
9. ASCD clutch switch
10. Clutch pedal
11. ASCD steering switch
12. CANSEC switch
13. RESUME/ACCELERATE switch
14. SET/COAST switch
15. MAIN switch
Component Description
Multiport fuel injection system
System Diagram System Description INPUT/OUTPUT SIGNAL CHART *1: This sensor is not used to control the engine system under normal conditions. *2: This signal is sent to the ECM through CAN ...Other materials:
ABS branch line circuit
Diagnosis Procedure
INSPECTION PROCEDURE
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the terminals and connectors of the ABS actuator and electric unit
(control unit) for damage, bend
and loose connection (unit ...
Water outlet and water piping
Removal and Installation
1. Water outlet
2. Gasket
3. O-ring
4. Heater pipe
5. Water connector
6. Water bypass pipe
7. Engine coolant temperature sensor
8. Washer
A. To electric throttle control actuator
B. To heater
C. To radiator
D. From heater or transmission oil cooler
(if equippe ...
P0451 evap control system pressure
sensor
Description
The EVAP control system pressure sensor detects pressure in the
purge line. The sensor output voltage to the ECM increases as pressure
increases.
DTC Logic
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously cond ...