Nissan Altima HL32 Hybrid. Manual - part 267

EC-52

< FUNCTION DIAGNOSIS >

[QR25DE]

AUTOMATIC SPEED CONTROL DEVICE (ASCD)

Component Description

INFOID:0000000004211333

JMBIA0118GB

1.

Exhaust manifold cover

2.

Air fuel ratio (A/F) sensor 1

3.

Air fuel ratio (A/F) sensor 1 harness 
connector

4.

Heated oxygen sensor 2 harness 
connector

5.

Heated oxygen sensor 2

6.

Oil pan

7.

Heated oxygen sensor 3

8.

Heated oxygen sensor 3 harness 
connector

: Vehicle front

ALBIA0272ZZ

Component

Reference

ASCD steering switch

EC-342, "Description"

ASCD brake switch

HBC-483, "Description"

, 

EC-345, "Description"

AUTOMATIC SPEED CONTROL DEVICE (ASCD)

EC-53

< FUNCTION DIAGNOSIS >

[QR25DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

Stop lamp switch

HBC-488, "Description"

, 

EC-353, "Description"

Electric throttle control actuator

EC-365, "Description"

MG1, MG2

HBC-39, "MG1 AND MG2 MAIN CONTROL : System Description"

ASCD indicator

HBC-589, "Description"

Component

Reference

EC-54

< FUNCTION DIAGNOSIS >

[QR25DE]

CAN COMMUNICATION

CAN COMMUNICATION

System Description

INFOID:0000000004211334

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..

COOLING FAN CONTROL

EC-55

< FUNCTION DIAGNOSIS >

[QR25DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

COOLING FAN CONTROL

System Diagram

INFOID:0000000004211335

System Description

INFOID:0000000004211336

INPUT/OUTPUT SIGNAL CHART

*: This signal is sent to ECM through CAN communication line.

SYSTEM DESCRIPTION

ECM controls cooling fan speed corresponding to vehicle speed, engine coolant temperature, air conditioner

ON signal, refrigerant pressure, target A/C evaporator temperature, A/C evaporator temperature and cooling

fan speed request from hybrid vehicle control ECU.

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.

JMBIA0459GB

Sensor

Input signal to ECM

ECM function

Actuator

Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)

Engine speed

Cooling fan 
control

IPDM E/R
↓
Cooling fan control module
↓
Cooling fan motor

Engine coolant temperature sensor

Engine coolant temperature

Refrigerant pressure sensor

Refrigerant pressure

Battery

Battery voltage

Controller (auto amp.)

Air conditioner ON signal*

A/C evaporator temperature*

Target A/C evaporator temperature*

Brake ECU

Vehicle speed*

Hybrid vehicle control ECU

Vehicle speed*

Cooling fan speed request*