Nissan Qashqai (2007-2010). Manual — part 376
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
EC-1023
< FUNCTION DIAGNOSIS >
[MR20DE (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
1.
Refrigerant pressure sensor
2.
Resister
3.
Cooling fan motor
1.
Intake valve timing control solenoid
valve
2.
Knock sensor
1.
Crankshaft position sensor (POS)
2.
Ground
1.
ASCD clutch switch
2.
Data link connector
JMBIA0445ZZ
JMBIA0446ZZ
JMBIA0347ZZ
JMBIA0348ZZ
EC-1024
< FUNCTION DIAGNOSIS >
[MR20DE (WITHOUT EURO-OBD)]
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
Component Description
INFOID:0000000001094068
1.
Stop lamp switch
2.
ASCD brake switch
3.
Accelerator pedal position sensor
1.
ASDC steering switch
2.
CANSEL switch
3.
RESUME/ACCCELERATE switch
4.
SET/COAST switch
5.
MAIN SWITCH
6.
1.
Fuel level sensor unit and fuel pump
harness connector
2.
Fuel level sensor unit and fuel pump 3.
Fuel pressure regulator
JMBIA0349ZZ
JMBIA0346ZZ
Component
Reference
ASCD steering switch
ASCD clutch switch
ASCD brake switch
ASCD indicator
Stop lamp switch
Electric throttle control actuator
CAN COMMUNICATION
EC-1025
< FUNCTION DIAGNOSIS >
[MR20DE (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
CAN COMMUNICATION
System Description
INFOID:0000000001094069
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-59, "CAN Communication Signal Chart"
, about CAN communication for detail..
EC-1026
< FUNCTION DIAGNOSIS >
[MR20DE (WITHOUT EURO-OBD)]
COOLING FAN CONTROL
COOLING FAN CONTROL
System Diagram
INFOID:0000000001094070
System Description
INFOID:0000000001094071
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 through 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 control system has 3-step control [HIGH/LOW/OFF].
JMBIA0177GB
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 relay
↓
Cooling fan motor
Battery
Battery voltage*
1
Combination meter
Vehicle speed*
2
Engine coolant temperature sensor
Engine coolant temperature
BCM
Air conditioner ON signal*
2
Refrigerant pressure sensor
Refrigerant pressure
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