Nissan Tiida C11. Manual - part 521

EC-734

< FUNCTION DIAGNOSIS >

[MR18DE]

AUTOMATIC SPEED CONTROL DEVICE (ASCD)

1.

Crankshaft position sensor (POS)

2.

Comshaft position sensor (PHASE)

3.

EVAP canistor purge volume control 
solenoid valve

4.

ECM

5.

Stop lamp switch

6.

Accelerator pedal position sensor

PBIA9902J

AUTOMATIC SPEED CONTROL DEVICE (ASCD)

EC-735

< FUNCTION DIAGNOSIS >

[MR18DE]

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Component Description

INFOID:0000000001161738

1.

ASCD steering switch

2.

MAIN switch

3.

CANCEL switch

4.

SET/COAST switch

5.

RESUME/ACCELEATE switch

6.

Stop lamp switch

7.

ASCD brake switch

8.

ASCD clutch switch

9.

Cluch pedal

ALBIA0273ZZ

Component

Reference

ASCD steering switch

EC-930, "Description"

ASCD clutch switch

EC-933, "Description"

ASCD brake switch

EC-933, "Description"

ASCD indicator

EC-968, "Description"

Stop lamp switch

EC-945, "Description"

Electric throttle control actuator

EC-885, "Description"

EC-736

< FUNCTION DIAGNOSIS >

[MR18DE]

CAN COMMUNICATION

CAN COMMUNICATION

System Description

INFOID:0000000001161739

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-14, "CAN Communication Control Circuit"

, about CAN communication for detail..

COOLING FAN CONTROL

EC-737

< FUNCTION DIAGNOSIS >

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COOLING FAN CONTROL

System Diagram

INFOID:0000000001161740

System Description

INFOID:0000000001161741

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].

Cooling Fan Operation

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