Nissan Altima L32. Manual - part 236

AIR CONDITIONING CUT CONTROL

EC-65

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Component Description

INFOID:0000000004349158

1.

No.1 ignition coil

2.

Cooling fan motor-1 harness con-
nector

3.

Cooling fan motor-2 harness con-
nector

4.

Refrigerant pressure sensor

5.

Accelerator pedal position sensor

6.

ASCD brake switch

7.

Stop lamp switch

8.

Brake pedal

9.

ASCD clutch switch

10. Clutch pedal

11. ASCD steering switch

12. CANSEC switch

13. RESUME/ACCELERATE switch

14. SET/COAST switch

15. MAIN switch

: Vehicle front

ALBIA0089ZZ

Component

Reference

Accelerator pedal position sensor

EC-427, "Description"

Camshaft position sensor (PHASE)

EC-282, "Description"

Crankshaft position sensor (POS)

EC-278, "Description"

Engine coolant temperature sensor

EC-184, "Description"

EC-66

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AIR CONDITIONING CUT CONTROL

Power steering pressure sensor

EC-354, "Description"

Refrigerant pressure sensor

EC-482, "Description"

Vehicle speed sensor

EC-348, "Description"

Component

Reference

AUTOMATIC SPEED CONTROL DEVICE (ASCD)

EC-67

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AUTOMATIC SPEED CONTROL DEVICE (ASCD)

System Diagram

INFOID:0000000004349159

System Description

INFOID:0000000004349160

INPUT/OUTPUT SIGNAL CHART

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

BASIC ASCD SYSTEM

Refer to Owner's Manual for ASCD operating instructions.

Automatic Speed Control Device (ASCD) allows a driver to keep vehicle at predetermined constant speed

without depressing accelerator pedal. Driver can set vehicle speed in advance between approximately 40 km/

h (25 MPH) and 144 km/h (89 MPH).

ECM controls throttle angle of electric throttle control actuator to regulate engine speed.

The ASCD operation status is indicated by two indicators (CRUISE and SET on the information display) on the

combination meter. If any malfunction occurs in ASCD system, SET indicator blinks and ASCD control is deac-

tivated.

NOTE:

Always drive vehicle in safe manner according to traffic conditions and obey all traffic laws.

SET OPERATION

Press MAIN switch. (CRUISE is indicated on the information display.)

When vehicle speed reaches a desired speed between approximately 40 km/h (25 MPH) and 144 km/h (89

MPH), press SET/COAST switch. (Then SET is indicated on the information display.)

ACCELERATE OPERATION

If the RESUME/ACCELERATE switch is pressed during cruise control driving, increase the vehicle speed until

the switch is released or vehicle speed reaches maximum speed controlled by the system.

And then ASCD will keep the new set speed.

JMBIA0176GB

Sensor

Input signal to ECM

ECM function

Actuator

ASCD brake switch

Brake pedal operation

ASCD vehicle speed control

Electric throttle control 
actuator

Stop lamp switch

Brake pedal operation

ASCD clutch switch (M/T models)

Clutch pedal operation

ASCD steering switch

ASCD steering switch operation

Park/neutral position (PNP) switch Gear position

Combination meter

Vehicle speed*

TCM (CVT models)

Powertrain revolution*

EC-68

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AUTOMATIC SPEED CONTROL DEVICE (ASCD)

CANCEL OPERATION

When any of following conditions exist, cruise operation will be canceled.

• CANCEL switch is pressed

• More than 2 switches at ASCD steering switch are pressed at the same time (Set speed will be cleared)

• Brake pedal is depressed

• Clutch pedal is depressed or gear position is changed to neutral position. (M/T models)

• Selector lever is changed to N, P, R position (CVT models)

• Vehicle speed decreased to 13 km/h (8 MPH) lower than the set speed

• TCS system is operated

When the ECM detects any of the following conditions, the ECM will cancel the cruise operation and inform

the driver by blinking indicators.

• Engine coolant temperature is slightly higher than the normal operating temperature, CRUISE indicator may

blink slowly.

When the engine coolant temperature decreases to the normal operating temperature, CRUISE indicator will

stop blinking and the cruise operation will be able to work by pressing SET/COAST switch or RESUME/

ACCELERATE switch.

• Malfunction for some self-diagnoses regarding ASCD control: SET indicator will blink quickly.

If MAIN switch is turned to OFF during ASCD is activated, all of ASCD operations will be canceled and vehicle

speed memory will be erased.

COAST OPERATION

When the SET/COAST switch is pressed during cruise control driving, decrease vehicle set speed until the

switch is released. And then ASCD will keep the new set speed.

RESUME OPERATION

When the RESUME/ACCELERATE switch is pressed after cancel operation other than pressing MAIN switch

is performed, vehicle speed will return to last set speed. To resume vehicle set speed, vehicle condition must

meet following conditions.

• Brake pedal is released

• Clutch pedal is released (M/T models)

• Selector lever is in other than P and N positions (CVT models)

• Vehicle speed is greater than 40 km/h (25 MPH) and less than 144 km/h (89 MPH)