INPUT/OUTPUT SIGNAL CHART

Sensor | Input signal to ECM | ECM function | Actuator
ASCD brake switch | Brake pedal operation |

- ASCD vehicle speed control
- ASCD operation signal

- Electric throttle control actuator
- Combination meter
  (ASCD indicator)
  (Information display)

Stop lamp switch | Brake pedal operation
ASCD steering switch | ASCD steering switch operation
TCM | Gear position Powertrain revolution*
Combination meter | Vehicle speed*
*: This signal is sent to the ECM via the 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 250 km/h (155 MPH).
ECM controls throttle angle of electric throttle control actuator to regulate vehicle speed.
Operation status of ASCD is indicated by CRUISE lamp and SET lamp in combination meter. Refer to Description (GT-R certified NISSAN dealer). The operation status is also indicated on the information display in the combination meter. Refer to Description (GT-R certified NISSAN dealer). If any malfunction occurs in the ASCD system, it automatically deactivates control.
NOTE：
Always drive vehicle in a safe manner according to traffic conditions and obey all traffic laws.
SET OPERATION
Press MAIN switch. (The CRUISE lamp in combination meter illuminates.)
When vehicle speed reaches a desired speed between approximately 40 km/h (25 MPH) and 250 km/h (155 MPH), press SET/COAST switch. (Then SET lamp in combination meter illuminates.)
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 maintain the new set speed.
CANCEL OPERATION
When any of following conditions exist, cruise operation will be canceled.

- MAIN switch is pressed (Set speed will be cleared)
- 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
- Selector lever position is P, N or R
- Vehicle speed decreased to 13 km/h (8 MPH) lower than the set speed
- VDC system is operated
- When the vehicle speed is approximately 30 km/h (19 MPH) or less

When the ECM detects any of the following conditions, the ECM will cancel the cruise operation and inform the driver by blinking indicator lamp.

- Engine coolant temperature is slightly higher than the normal operating temperature, CRUISE lamp may blink slowly.When the engine coolant temperature decreases to the normal operating temperature, CRUISE lamp 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 lamp will blink quickly.

If 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 canceling operation other than pressing the MAIN switch, vehicle speed will return to last set speed. To resume vehicle set speed, vehicle condition must meet following conditions.

- Brake pedal is released
- Selector lever position is other than P, N and R
- Vehicle speed is greater than 40 km/h (25 MPH) and less than 250 km/h (155 MPH)