Nissan Versa Sedan Service ManualEngine » Engine control system (EC)
Automatic speed control device (ASCD)
Automatic speed control device (ASCD)
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.
Alternator power generation voltage variable control system
Alternator power generation voltage variable control system : system description
The alternator power generation voltage variable control system controls the amount of power generation, according to a battery loaded condition. ECM judges a battery condition, according to a signal received from the battery current sensor which detects a charge/discharge current. ECM then transmits a signal to IPDM E/ R to command power generation via CAN communication. IPDM E/R transmits a power generation control signal to the alternator so that the system can control the amount of power generation. The voltage of power generation is lowered during battery lowload conditions and boosted under heavy load conditions. In this way, the system reduces the engine load through the adequate power generation control.
Precaution
Engine control system
Structure and operation
Engine control system
Multiport fuel injection system
Electric ignition system
Air conditioning cut control
Cooling fan control
Evaporative emission system
Intake valve timing control
Exhaust valve timing control
Engine protection control at low engine oil pressure
Fuel filler cap warning system
Automatic speed control device (ASCD)
Automatic speed control device (ASCD)
Diagnosis description
Ecm
Diagnosis and repair workflow
Additional service when replacing ECM
Accelerator pedal released position learning
Throttle valve closed position learning
Idle air volume learning
Mixture ratio selflearning value clear
Basic inspection
Fuel pressure check
How to set SRT code
How to erase permanent DTC
Trouble diagnosis specification value
Power supply and ground circuit
U0101 can comm circuit
U1001 CAN comm circuit
P0011 IVT control
P0014 EVT control
P0031, P0032 A/F sensor 1 heater
P0037, P0038 HO2s2 heater
P0075 IVT control solenoid valve
P0078 EVT control solenoid valve
P0101 MAF sensor
P0102, P0103 MAF sensor
P0111 IAT sensor
P0112, P0113 IAT sensor
P0116 ECT sensor
P0117, P0118 ECT sensor
P0122, P0123 TP sensor
P0125 ECT sensor
P0127 IAT sensor
P0128 thermostat function
P0130 A/F sensor 1
P0131 A/F sensor 1
P0132 A/F sensor 1
P0137 HO2s2
P0138 HO2s2
P0139 HO2s2
P014C, P014D, P015A, P015B, A/F sensor 1
P0171 fuel injection system function
P0181 FTT sensor
P0182, P0183 FTT sensor
P0196 EOT sensor
P0197, P0198 EOT sensor
P0222, P0223 TP sensor
P0300, P0301, P0302, P0303, P0304 misfire
P0327, P0328 KS
P0335 CKP sensor (POC)
P0340 CMP sensor (PHASE)
P0420 three way catalyst function
P0441 EVAP control system
P0443 EVAP canister purge volume control solenoid valve
P0444, P0445 EVAP canister purge volume control solenoid valve
P0447 EVAP canister vent control valve
P0448 EVAP canister vent control valve
P0451 EVAP control system pressure sensor
P0452 EVAP control system pressure sensor
P0453 EVAP control system pressure sensor
P0456 EVAP control system
P0460 fuel level sensor
P0461 fuel level sensor
P0462, P0463 fuel level sensor
P0500 VSS
P0506 ISC system
P0507 ISC system
P050a, P050b, P050e cold start control
P0520 EOP sensor
P0524 engine oil pressure
P0603 ECM power supply
P0605 ECM
P0607 ECM
P0643 sensor power supply
P0850 PNP switch
P1078 EVT control position sensor
P1148 closed loop control
P117A air fuel ratio
P1212 TCS communication line
P1217 engine over temperature
P1225 TP sensor
P1226 TP sensor
P1550 battery current sensor
P1551, P1552 battery current sensor
P1553 battery current sensor
P1554 battery current sensor
P1564 ASCD steering switch
P1572 ASCD brake switch
P1574 ASCD vehicle speed sensor
P1715 Input speed sensor
P1720 VSS
P1805 brake switch
P2096, P2097 A/F sensor 1
P2100, P2103 throttle control motor relay
P2101 electric throttle control function
P2118 throttle control motor
P2119 electric throttle control actuator
P2122, P2123 APP sensor
P2127, P2128 APP sensor
P2135 TP sensor
P2138 APP sensor
Brake pedal position switch
Clutch pedal position switch
Cooling fan
Electrical load signal
Fuel injector
Fuel pump
Ignition signal
Malfunction indicator lamp
On board refueling vapor recovery (ORVR)
Refrigerant pressure sensor
Engine control system symptoms
Normal operating condition
IDLE SPEED
Ignition timing
Evaporative emission system
EVAP leak check
Positive crankcase ventilation
Removal and installation
Service data and specifications (SDS)
Nissan Versa Sedan Service Manual
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