Nissan Versa (N17): Automatic speed control device (ASCD)

Nissan Versa 2nd generation (N17) Service Manual / Engine / Engine control system (EC) / Automatic speed control device (ASCD)

Automatic speed control device (ascd) : system diagram

Automatic speed control device (ascd) : system diagram

NOTE:

Transmission range switch and TCM is also for A/T models.

Automatic speed control device (ascd) : system description

INPUT/OUTPUT SIGNAL CHART

Sensor Input signal to ECM ECM function Actuator
Brake pedal position switch Brake pedal operation ASCD vehicle speed control Electric throttle control actuator
Stop lamp switch
Clutch pedal position switch (M/T models) Clutch pedal operation
ASCD steering switch ASCD steering switch operation
Transmission range switch (A/T models or CVT models) PNP signal
Park/neutral position (PNP) PNP signal switch (M/T models)
Combination meter Vehicle speed signal*
TCM (A/T models or CVT models) Output shaft revolution signal*

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

BASIC ASCD SYSTEM

Automatic Speed Control Device (ASCD) allows a driver to keep vehicle at predetermined constant speed without depressing accelerator pedal. Driver can be set the vehicle speed in the set speed range.

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

Operation status of ASCD is indicated in combination meter.

If any malfunction occurs in the ASCD system, it automatically deactivates the ASCD control.

CAUTION:

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

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