Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSNISSAN-DATSUN2012SENTRA SE-RREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 9 (ENGINE CONTROL SYSTEM - INTRODUCTION (MR20DE) (CALIFORNIA))SERVICE INFORMATIONAUTOMATIC SPEED CONTROL DEVICE (ASCD)SYSTEM DESCRIPTIONINPUT/OUTPUT SIGNAL CHART
2012 Nissan-Datsun Sentra SE-R
Input/Output Signal Chart
2012 Nissan-Datsun Sentra SE-RSECTION Input/Output Signal Chart
WARNING: This page is about a different variant/trim than selected.
| 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 (M/T) Transmission range switch (CVT) |
Gear position | ||||
| ABS actuator and electric unit (control unit) | Vehicle speed(1) | ||||
| Combination meter | |||||
| TCM (CVT models) | Powertrain revolution(1) | ||||
|
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.