NISSAN LATIO 2010 Service Repair Manual

EC-56
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AIR CONDITIONING CUT CONTROL
1. Air fuel ratio (A/F) sensor 1 2. Three way catalyst (Manifold) 3. Heated oxygen sensor 2
4. Three way catalyst (Under floor) 5. Muffler
Vehicle front
1. Exhaust manifold 2. Air fuel ratio (A/F) sensor 1 3. Heated oxygen sensor 2
4. Heated oxygen sensor 2 harness connector
Vehicle front
JMBIA2192ZZ
PBIB2943E
Revision: January 20102010 Versa

AIR CONDITIONING CUT CONTROLEC-57
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Component DescriptionINFOID:0000000005398263
1. Cooling fan motor harness connec-
tor 2. Crankshaft position sensor 3. Stop lamp switch
4. Brake pedal 5. Accelerator pedal position sensor
harness connector 6. Accelerator pedal position sensor
7. Accelerator pedal 8. Fuel level sensor unit and fuel pump
harness connector (view with in-
spection hole cover removed) 9. Fuel pressure regulator
10. Fuel pump
AWBIA0044ZZ
Component Reference
Accelerator pedal position sensor EC-392, "
Description"
Camshaft position sensor (PHASE)EC-262, "Description"
Crankshaft position sensor (POS)EC-257, "Description"
Revision: January 20102010 Versa

EC-58
< FUNCTION DIAGNOSIS >[HR16DE]
AIR CONDITIONING CUT CONTROL
Engine coolant temperature sensor
EC-161, "Description"
Refrigerant pressure sensorEC-450, "Description"
Component Reference
Revision: January 20102010 Versa

CAN COMMUNICATIONEC-59
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CAN COMMUNICATION
System DescriptionINFOID:0000000005398264
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each
control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.
Refer to LAN-27, "
CAN Communication Signal Chart", about CAN communication for detail.
Revision: January 20102010 Versa

EC-60
< FUNCTION DIAGNOSIS >[HR16DE]
COOLING FAN CONTROL
COOLING FAN CONTROL
System DiagramINFOID:0000000005398265
System DescriptionINFOID:0000000005398266
INPUT/OUTPUT SIGNAL CHART
*1: The ECM determines the start signal status by the signals of engine speed and battery voltage.
*2: This signal is sent to ECM via the CAN communication line.
SYSTEM DESCRIPTION
ECM controls cooling fan speed corresponding to vehicle
speed, engine coolant temperature, refrigerant pres-
sure, air conditioner ON signal. Then contro l system has 3-step control [HIGH/LOW/OFF].
Cooling Fan Operation
JMBIA2196GB
SensorInput signal to ECM ECM function Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE) Engine speed*
1
Cooling fan
controlIPDM E/R
↓
Cooling fan relay
↓
Cooling fan motor
Battery
Battery voltage*
1
ABS actuator and electric unit (control unit)
Vehicle speed*2Combination meter
Engine coolant temperature sensorEngine coolant temperature
BCM Air conditioner ON signal*
2
Refrigerant pressure sensorRefrigerant pressure
Revision: January 20102010 Versa

COOLING FAN CONTROLEC-61
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Models with A/C
Models without A/C
Cooling Fan Relay Operation
The ECM controls cooling fan relays via the CAN communication line.
PBIB2483E
PBIB3335E
Cooling fan speed
Cooling fan relay
123
Stop (OFF) OFFOFF OFF
Low (LOW) ONOFF OFF
High (HI) ONON ON
Revision: January 20102010 Versa

EC-62
< FUNCTION DIAGNOSIS >[HR16DE]
COOLING FAN CONTROL
Component Parts Location
INFOID:0000000005398267
1. Ignition coil (with power transistor) and spark plug 2. Intake valve timing control solenoid
valve 3. Refrigerant pressure sensor
4. Knock sensor 5. Fuel injector6. Cooling fan motor
7. Camshaft position sensor (PHASE) 8. IPDM E/R 9. ECM
10. Mass air flow sensor (with intake air temperature sensor) 11. Engine coolant temperature sensor 12. Electric throttle control actuator
(with built in throttle position sensor
and throttle control motor)
13. EVAP canister purge volume control solenoid valve
PBIB2939E
Revision: January 20102010 Versa

COOLING FAN CONTROLEC-63
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1. Mass air flow sensor
(with intake air temperature sensor) 2. Engine coolant temperature sensor 3. Electric throttle control actuator
4. Camshaft position sensor (PHASE) 5. Ignition coil (with power transistor) 6. Fuel injector
7. EVAP canister purge volume control solenoid valve
Vehicle front
PBIB2940E
Revision: January 20102010 Versa

EC-64
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COOLING FAN CONTROL
1. ECM harness connectors
2. ECM 3. IPDM E/R
4. Fuel pump fuse (15A) 5. Intake valve timing control solenoid
valve 6. Knock sensor
7. Refrigerant pressure sensor 8. PCV valve Vehicle front
PBIB2941E
Revision: January 20102010 Versa

COOLING FAN CONTROLEC-65
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1. Air fuel ratio (A/F) sensor 1 2. Three way catalyst (Manifold) 3. Heated oxygen sensor 2
4. Three way catalyst (Under floor) 5. Muffler
Vehicle front
1. Exhaust manifold 2. Air fuel ratio (A/F) sensor 1 3. Heated oxygen sensor 2
4. Heated oxygen sensor 2 harness connector
Vehicle front
JMBIA2192ZZ
PBIB2943E
Revision: January 20102010 Versa