COOLING FAN CONTROL
VR38
System Diagram
System Description
INPUT/OUTPUT SIGNAL CHART|
Sensor |
Input signal to ECM |
ECM function |
Actuator |
|
Crankshaft position sensor (POS) Camshaft position sensor (PHASE) |
Engine speed*1 |
Cooling fan control |
IPDM E/R ↓ Cooling fan control module ↓ Cooling fan motor |
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Engine coolant temperature sensor |
Engine coolant temperature |
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Refrigerant pressure sensor |
Refrigerant pressure |
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Battery |
Battery voltage*1 |
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Combination meter |
Vehicle speed*2 |
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A/C auto amp. |
Air conditioner ON signal*2 |
SYSTEM DESCRIPTIONECM controls cooling fan speed corresponding to vehicle speed, engine coolant temperature, air conditioner ON signal, refrigerant pressure.
Cooling fan control signal is sent to IPDM E/R from ECM by CAN communication line. Then, IPDM E/R sends ON/OFF pulse duty signal to cooling fan control module. Corresponding to this ON/OFF pulse duty signal, cooling fan control module gives cooling fan motor operating voltage to cooling fan motors. Cooling fan speed is controlled by duty cycle of cooling fan motor operating voltage sent from cooling fan control module.
NOTE：
To cool off the engine, the cooling fan may continue to say ON for two minutes after turning OFF the ignition switch.
Component Parts Location
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1. |
Air cut solenoid valve relay |
2. |
Recirculation valve (bank 1) |
3. |
Refrigerant pressure sensor |
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4. |
Mass air flow sensor (with intake air temperature sensor) (bank 1) |
5. |
Power steering pressure sensor |
6. |
EVAP canister purge volume control solenoid valve |
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7. |
Cooling fan motor |
8. |
Cooling fan control module |
9. |
Intake valve timing control solenoid valve |
|
10. |
Turbocharger boost control solenoid valve |
11. |
Mass air flow sensor (with intake air temperature sensor) (bank 2) |
12. |
Recirculation valve (bank 2) |
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13. |
Turbocharger boost sensor (bank 2) |
14. |
Cooling fan relay-1 |
15. |
Cooling fan relay-2 |
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16. |
Electric throttle control actuator (bank 2) |
17. |
Ignition coil (with power transistor) and spark plug (bank 2) |
18. |
Camshaft position sensor (PHASE) (bank 2) |
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19. |
Air cut solenoid valve (bank 2) |
20. |
Crankshaft position sensor (POS) |
21. |
Fuel injector (bank 2) |
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22. |
Knock sensor |
23. |
Engine oil temperature sensor |
24. |
Fuel injector (bank 1) |
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25. |
Engine coolant temperature sensor |
26. |
A/F sensor 1 (bank 1) |
27. |
Camshaft position sensor (PHASE) (bank 1) |
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28. |
Air cut solenoid valve (bank 1) |
29. |
Manifold absolute pressure sensor |
30. |
Ignition coil (with power transistor) and spark plug (bank 1) |
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31. |
Electric throttle control actuator (bank 1) |
32. |
EVAP service port |
33. |
Turbocharger boost sensor (bank 1) |
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34. |
IPDM E/R |
35. |
Air pump cleaner |
36. |
Air pump |
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37. |
Air pump relay |
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1. |
Mass air flow sensor (with intake air temperature sensor) (bank 1) |
2. |
Mass air flow sensor (with intake air temperature sensor) (bank 2) |
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:Vehicle front |
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1. |
Manifold absolute pressure sensor |
2. |
Electric throttle control actuator (bank 1) |
3. |
Turbocharger boost sensor (bank 1) |
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4. |
Turbocharger boost sensor (bank 2) |
5. |
Electric throttle control actuator (bank 2) |
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:Vehicle front |
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1. |
Intake valve timing control solenoid valve (bank1) |
2. |
Intake valve timing control solenoid valve (bank2) |
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:Vehicle front |
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1. |
Cooling fan relay-2 |
2. |
Cooling fan relay-1 |
3. |
Cooling fan motor-1 |
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4. |
Cooling fan control module-1 |
5. |
Cooling fan control module-2 |
6. |
Cooling fan motor-2 |
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:Vehicle front |
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1. |
Power steering pressure sensor |
2. |
Refrigerant pressure sensor |
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:Vehicle front |
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1. |
EVAP service port |
2. |
EVAP canister purge volume control solenoid valve |
3. |
EVAP canister |
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4. |
EVAP control system pressure sensor |
5. |
EVAP canister vent control valve |
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:Vehicle front |
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1. |
Ignition coil No.1 (with power transistor) |
2. |
Ignition coil No.3 (with power transistor) |
3. |
Ignition coil No.5 (with power transistor) |
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4. |
Condenser |
5. |
Ignition coil No.6 (with power transistor) |
6. |
Ignition coil No.4 (with power transistor) |
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7. |
Ignition coil No.2 (with power transistor) |
8. |
Fuel injector No.1 |
9. |
Fuel injector No.3 |
|
10. |
Fuel injector No.5 |
11. |
Fuel pressure regulator |
12. |
Fuel injector No.6 |
|
13. |
Fuel injector No.4 |
14. |
Fuel injector No.2 |
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:Vehicle front |
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1. |
Camshaft position sensor (PHASE) (bank 1) |
2. |
Camshaft position sensor (PHASE) (bank 2) |
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:Vehicle front |
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1. |
Engine oil temperature sensor |
2. |
PCV valve |
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:Vehicle front |
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1. |
Crankshaft position sensor (POS) |
2. |
Knock sensor (bank1) |
3. |
Knock sensor (bank2) |
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:Vehicle front |
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1. |
Boost control actuator (bank1) |
2. |
Turbocharger boost control solenoid valve |
3. |
Boost control actuator (bank2) |
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:Vehicle front |
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1. |
Heated oxygen sensor 2 (bank 2) |
2. |
Heated oxygen sensor 2 (bank 1) |
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:Vehicle front |
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1. |
A/F sensor 1 (bank 1) harness connector |
2. |
A/F sensor 1 (bank 2) harness connector |
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:Vehicle front |
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1. |
A/F sensor 1 (bank 2) |
2. |
A/F sensor 1 (bank 1) |
3. |
Fuel pump control module (FPCM) |
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:Vehicle front |
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1. |
Sub fuel pump harness connector |
2. |
Main fuel gauge fuel filter fuel pump assembly harness connector |
3. |
Sub fuel pump |
|
4. |
Main fuel gauge fuel filter fuel pump assembly |
5. |
Fuel pump |
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:Vehicle front |
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1. |
ECM |
2. |
Brake switch |
3. |
Stop lamp switch |
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4. |
Accelerator pedal position sensor |
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1. |
ASCD steering switch |
2. |
RESUME/ACCELERATE switch |
3. |
SET/COAST switch |
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4. |
CANCEL switch |
5. |
MAIN switch |
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|
|
1. |
Air cut solenoid valve (bank 2) |
2. |
Air cut solenoid valve (bank 1) |
3. |
Engine coolant temperature sensor |
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4. |
Air pump |
5. |
Secondary air injection system mass air flow sensor |
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:Vehicle front |
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1. |
Air cut solenoid valve relay |
2. |
Air pump relay |
3. |
Air pump cleaner |
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4. |
IPDM E/R |
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Component Description
|
Component |
Reference |
|
Camshaft position sensor (PHASE) |
Description (GT-R certified NISSAN dealer)
|
|
Crankshaft position sensor (POS) |
Description (GT-R certified NISSAN dealer)
|
|
Cooling fan control module |
Description (GT-R certified NISSAN dealer)
|
|
Cooling fan motor |
Description (GT-R certified NISSAN dealer)
|
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Engine coolant temperature sensor |
Description (GT-R certified NISSAN dealer)
|
|
Refrigerant pressure sensor |
Description (GT-R certified NISSAN dealer)
|