Nissan Versa (N17): Cooling fan control
Cooling fan control : system diagram
Cooling fan control : 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 Piston position | Cooling fan speed request signal | IPDM E/R ↓ Cooling fan relay ↓ Cooling fan motor |
| Engine coolant temperature sensor | Engine coolant temperature | ||
| Battery | Battery voltage*1 | ||
| Refrigerant pressure sensor | Refrigerant pressure | ||
| Combination meter | Vehicle speed signal*2 | ||
| BCM | A/C ON signal*2 Blower fan signal*2 |
*1: The ECM determines the start signal status by the signals of engine speed and battery voltage.
*2: This signal is sent to ECM through CAN communication line.
SYSTEM DESCRIPTION (EXCEPT FOR SINGLE CONNECTOR COOLING FAN WITHOUT A/C)
ECM controls cooling fan speed corresponding to vehicle speed, engine coolant temperature, refrigerant pressure, air conditioner ON signal. Then control system has 3step control [HIGH/LOW/OFF].
Cooling Fan Operation
Cooling Fan Relay Operation
The ECM controls cooling fan relays through CAN communication line.
| Cooling fan speed | Cooling fan low relay | Cooling fan high relay | Cooling fan relay |
| Stop (OFF) | OFF | OFF | OFF |
| Low (LOW) | ON | OFF | OFF |
| High (HI) | ON | ON | ON |
SYSTEM DESCRIPTION (FOR SINGLE CONNECTOR COOLING FAN WITHOUT A/C)
ECM controls cooling fan speed corresponding to vehicle speed, engine coolant temperature, refrigerant pressure, air conditioner ON signal. Then control system has 2step control [HIGH/OFF].
Cooling Fan Operation
Cooling Fan Relay Operation
The ECM controls cooling fan relays through CAN communication line.
| Cooling fan speed | Cooling fan low relay |
| Stop (OFF) | OFF |
| Operate (HI) | ON |
Air conditioning cut control
AIR CONDITIONING CUT CONTROL : System Diagram AIR CONDITIONING CUT CONTROL : System Description INPUT/OUTPUT SIGNAL CHART Sensor Input signal to ECM ECM function Actuator ...
Evaporative emission system
EVAPORATIVE EMISSION SYSTEM : System Diagram EVAPORATIVE EMISSION SYSTEM : System Description INPUT/OUTPUT SIGNAL CHART Sensor Input signal to ECM ECM function Actuator ...
Other materials:
Electric ignition system
ELECTRIC IGNITION SYSTEM : System Diagram
ELECTRIC IGNITION SYSTEM : System Description
INPUT/OUTPUT SIGNAL CHART
Sensor
Input signal to ECM
ECM function
Actuator
Crankshaft position sensor (POS)
Engine speed*3
Piston position
Ignition timing control
Igni ...
P1715 Input speed sensor
Description
ECM receives input speed sensor signal from TCM via the CAN communication
line. ECM uses this signal for
engine control.
DTC Logic
DTC DETECTION LOGIC
NOTE:
If DTC P1715 is displayed with DTC UXXXX, first perform the
trouble diagnosis for DTC UXXXX.
If DTC P1715 is displa ...
Categories
- Manuals Home
- Nissan Versa Owners Manual
- Nissan Versa Service Manual
- Video Guides
- Questions & Answers
- External Resources
- Latest Updates
- Most Popular
- Sitemap
- Search the site
- Privacy Policy
- Contact Us
0.0056