Infiniti G37 Coupe. Manual — part 468
ELECTRIC IGNITION SYSTEM
EC-53
< FUNCTION DIAGNOSIS >
[VQ37VHR]
C
D
E
F
G
H
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K
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M
A
EC
N
P
O
Park/neutral position switch
Throttle position sensor
Vehicle speed sensor
Component
Reference
EC-54
< FUNCTION DIAGNOSIS >
[VQ37VHR]
AIR CONDITIONING CUT CONTROL
AIR CONDITIONING CUT CONTROL
System Diagram
INFOID:0000000001733939
System Description
INFOID:0000000001733940
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.
JMBIA0073GB
Sensor
Input Signal to ECM
ECM function
Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)
Engine speed*
2
Air conditioner
cut control
IPDM E/R
↓
A/C relay
↓
Compressor
Engine coolant temperature sensor
Engine coolant temperature
Accelerator pedal position sensor
Accelerator pedal position
Battery
Battery voltage*
2
Refrigerant pressure sensor
Refrigerant pressure
Power steering pressure sensor
Power steering operation
Unified meter and A/C amp.
Air conditioner ON signal*
1
Vehicle speed*
1
AIR CONDITIONING CUT CONTROL
EC-55
< FUNCTION DIAGNOSIS >
[VQ37VHR]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
Component Parts Location
INFOID:0000000001910706
1.
Battery current sensor
2.
IPDM E/R
3.
VVEL control module
4.
Cooling fan relay
5.
VVEL actuator motor relay
6.
Mass air flow sensor (with intake air
temperature sensor) (bank 1)
7.
Refrigerant pressure sensor
8.
Camshaft position sensor (PHASE)
(bank 1)
9.
Cooling fan motor-2
10. Intake valve timing control solenoid
valve (bank 1)
11.
Cooling fan control module
12. Cooling fan motor-1
13. Intake valve timing control solenoid
valve (bank 2)
14. Camshaft position sensor (PHASE)
(bank 2)
15. Mass air flow sensor (with intake air
temperature sensor) (bank 2)
16. ICC brake hold relay (ICC models)
17. Brake booster pressure sensor
18. Ignition coil (with power transistor)
and spark plug (bank 2)
19. Electric throttle control actuator
(bank 2)
20. A/F sensor 1 (bank 2)
21. Fuel injector (bank 2)
22. VVEL control shaft position sensor
(bank 2)
23. VVEL actuator motor (bank 2)
24. Manifold absolute pressure (MAP)
sensor
25. Engine coolant temperature sensor
26. Knock sensor
27. Fuel injector (bank 1)
28. VVEL actuator motor (bank 1)
29. EVAP canister purge volume control
solenoid valve
30. VVEL control shaft position sensor
(bank 1)
JMBIA0837ZZ
EC-56
< FUNCTION DIAGNOSIS >
[VQ37VHR]
AIR CONDITIONING CUT CONTROL
31. Ignition coil (with power transistor)
and spark plug (bank 1)
32. EVAP service port
33. A/F sensor 1 (bank 1)
34. Crankshaft position sensor (POS)
35. Electric throttle control actuator
(bank 1)
1.
Mass air flow sensor (with intake air
temperature sensor) (bank 1)
2.
Mass air flow sensor (with intake air
temperature sensor) (bank 2)
1.
Electric throttle control actuator
(bank 1)
2.
Electric throttle control actuator
(bank 2)
: Vehicle front
1.
Cooling fan motor-2
2.
Cooling fan control module
3.
Cooling fan motor-1
4.
Cooling fan relay
JMBIA0838ZZ
JMBIA0839ZZ
JMBIA0840ZZ
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