Nissan Altima 2007-2012 Service Manual: Air conditioning cut control
System Diagram
System Description
INPUT/OUTPUT SIGNAL CHART
*1: This signal is sent to the ECM through CAN communication line.
*2: ECM determines the start signal status by the signals of engine speed and battery voltage.
SYSTEM DESCRIPTION
This system improves engine operation when the air conditioner is used.
Under the following conditions, the air conditioner is turned off.
• When the accelerator pedal is fully depressed.
• When cranking the engine.
• At high engine speeds.
• When the engine coolant temperature becomes excessively high.
• When operating power steering during low engine speed or low vehicle speed.
When engine speed is excessively low.
• When refrigerant pressure is excessively low or high.
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. Tumble control valve actuator
14. EVAP service port
15. Electric throttle control actuator (with built in throttle position sensor and throttle control motor)
16. EVAP canister purge volume control solenoid valve
17. Fuel injector
18. 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
14. Heated oxygen sensor 3 (This illustration is view form under vehicle.)
15. Heated oxygen sensor 3 harness connector (This illustration is view from under vehicle.)
1. Thermostat housing
2. Tumble control valve actuator
3. Throttle valve (This illustration is view with intake air duct removed.)
4. Electric throttle control actuator
5. Fuel injector harness connector
6. Condenser-2
7. Radiator hose (upper)
8. Battery
9. ECM
10. Fuel level sensor unit and fuel pump harness connector (This illustration is view with rear seat cushion and inspection hole cover removed.)
11. Fuel level sensor unit and fuel pump assembly
12. Fuel pressure regulator
13. Fuel tank temperature sensor
14. EVAP control system pressure sensor (This illustration is view with rear suspension member removed.)
15. EVAP canister vent control valve (This illustration is view with rear suspension member removed.)
16. 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
Electric ignition system
System Diagram
System Description
INPUT/OUTPUT SIGNAL CHART
*1: This signal is sent to the ECM through CAN communication line.
*2: ECM determines the start signal status by the signals of en ...
Automatic speed control device
(ASCD)
System Diagram
System Description
INPUT/OUTPUT SIGNAL CHART
*: This signal is sent to the ECM through CAN communication line
BASIC ASCD SYSTEM
Refer to Owner's Manual for ASCD operating ins ...
Other materials:
Intermittents incident
Inspection Procedure
INTERMITTENT TROUBLE
An intermittent incident may have occured in the past but is not being
detected currently. This DTC will not be
detected on SELF DIAG [CURRENT], but may be viewed on SELF DIAG [PAST] using
CONSULT-III.
Trouble Diagnosis with CONSULT-III
DIAGNOSTIC P ...
P0643 sensor power supply
DTC Logic
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always turn
ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following proced ...
Low tire pressure warning lamp
does not turn on
Low Tire Pressure Warning Lamp Does Not Come
On When Ignition Switch Is Turned On
DIAGNOSTIC PROCEDURE
1.SELF-DIAGNOSTIC RESULT CHECK
Using CONSULT-III, check display contents of BCM in SELF-DIAGNOSIS.
Is "CAN COMM CIRCUIT" displayed in the self-diagnosis display items?
YES >> ...