Nissan Altima L32. Instruction — part 234
ELECTRIC IGNITION SYSTEM
EC-57
< FUNCTION DIAGNOSIS >
[QR25DE FOR CALIFORNIA]
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Component Description
INFOID:0000000004349154
1.
No.1 ignition coil
2.
Cooling fan motor-1 harness con-
nector
3.
Cooling fan motor-2 harness con-
nector
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
: Vehicle front
ALBIA0089ZZ
Component
Reference
Accelerator pedal position sensor
Camshaft position sensor (PHASE)
Crankshaft position sensor (POS)
Engine coolant temperature sensor
EC-58
< FUNCTION DIAGNOSIS >
[QR25DE FOR CALIFORNIA]
ELECTRIC IGNITION SYSTEM
Ignition signal
Knock sensor
Mass air flow sensor
Park/neutral position switch
Throttle position sensor
Vehicle speed sensor
Component
Reference
AIR CONDITIONING CUT CONTROL
EC-59
< FUNCTION DIAGNOSIS >
[QR25DE FOR CALIFORNIA]
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AIR CONDITIONING CUT CONTROL
System Diagram
INFOID:0000000004349155
System Description
INFOID:0000000004349156
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.
JMBIA0175GB
Sensor
Input Signal to ECM
ECM function
Actuator
Air conditioner switch*
1
Air conditioner ON signal
Air conditioner
cut control
IPDM E/R
↓
Air conditioner relay
↓
Compressor
Accelerator pedal position sensor
Accelerator pedal position
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)
Engine speed*
2
Engine coolant temperature sensor
Engine coolant temperature
Battery
Battery voltage*
2
Refrigerant pressure sensor
Refrigerant pressure
Power steering pressure sensor
Power steering operation
Combination meter
Vehicle speed*
1
BCM
Air conditioner ON signal*
1
EC-60
< FUNCTION DIAGNOSIS >
[QR25DE FOR CALIFORNIA]
AIR CONDITIONING CUT CONTROL
• When engine speed is excessively low.
• When refrigerant pressure is excessively low or high.
Component Parts Location
INFOID:0000000004349157
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
ALBIA0046ZZ
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