Nissan Versa
 Sedan Service Manual
Engine » Engine control system (EC)
Electric ignition system





Sensor Input signal to ECM ECM function Actuator
Crankshaft position sensor (POS) Engine speed*3 Piston position Ignition timing control Ignition coil (with power transistor)
Camshaft position sensor (PHASE)
Mass air flow sensor Amount of intake air
Engine coolant temperature sensor Engine coolant temperature
Throttle position sensor Throttle position
Accelerator pedal position sensor Accelerator pedal position
Park/neutral position (PNP) switch*1 PNP signal
Transmission range switch*2
Battery Battery voltage*3
Knock sensor Engine knocking
Combination meter Vehicle speed*4

*1: M/T models *2: A/T models or CVT models *3: ECM determines the start signal status by the signals of engine speed and battery voltage.

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


Firing order: 1 3 4 2 The ignition timing is controlled by the ECM to maintain the best airfuel ratio for every running condition of the engine. The ignition timing data is stored in the ECM.

The ECM receives information such as the injection pulse width and camshaft position sensor signal. Computing this information, ignition signals are transmitted to the power transistor.

During the following conditions, the ignition timing is revised by the ECM according to the other data stored in the ECM.

  • At starting
  • During warmup
  • At idle
  • At low battery voltage
  • During acceleration

The knock sensor retard system is designed only for emergencies. The basic ignition timing is programmed within the antiknocking zone, if recommended fuel is used under dry conditions. The retard system does not operate under normal driving conditions. If engine knocking occurs, the knock sensor monitors the condition.

The signal is transmitted to the ECM. The ECM retards the ignition timing to eliminate the knocking condition.

    More about «Engine control system (EC)»:


    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


    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

    Nissan Versa Sedan Service Manual / Engine / Engine control system (EC) / Electric ignition system

    Nissan Versa Sedan Service Manual


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