Nissan Maxima Service and Repair Manual: Power generation voltage variable control system

Nissan Maxima Service and Repair Manual / Power outlet / Charging system / System description / Power generation voltage variable control system

System Diagram

Nissan Maxima. System Diagram

System Description

Power generation variable voltage control system has been adopted. By varying the voltage to the generator, engine load due to power generation of the generator is reduced and fuel consumption is decreased.

NOTE: When any malfunction is detected in the power generation variable voltage control system, power generation is performed according to the characteristic of the IC regulator in the generator.

Component Description

Component part

Description

Battery current sensor The battery current sensor is installed on the battery cable at the negative terminal. The battery current sensor detects the charging/ discharging current of the battery and sends a voltage signal to the ECM according to the current value detected.
ECM The battery current sensor detects the charging/discharging current of the battery. The ECM judges the battery condition based on this signal.

The ECM judges whether to request more output via the power generation voltage variable control according to the battery condition.

When performing the power generation voltage variable control, the ECM calculates the target power generation voltage according to the battery condition and sends the calculated value as the power generation command value to the IPDM E/R.

IPDM E/R The IPDM E/R converts the received power generation command value into a pulse width modulated (PWM) command signal and sends it to the IC regulator
Generator (IC regulator) The IC regulator controls the power generation voltage by the target power generation voltage based on the received PWM command signal.

When there is no PWM command signal, the generator performs the normal power generation according to the characteristic of the IC regulator.

    Charging system
    System Diagram System Description The generator provides DC voltage to operate the vehicle's electrical system and to keep the battery charged. The voltage output is controlled by the IC re ...

    DTC/circuit diagnosis
    CHARGING SYSTEM PRELIMINARY INSPECTION Diagnosis Procedure 1.CHECK BATTERY TERMINALS CONNECTION Check if battery terminals are clean and tight 2.CHECK FUSE Check for blown fuse and fusible link. ...

    Other materials:

    P0456 evap control system
    DTC Logic DTC DETECTION LOGIC NOTE: If DTC P0456 is displayed with DTC P0442, first perform the trouble diagnosis for DTC P0456. This diagnosis detects very small leakage in the EVAP line between fuel tank and EVAP canister purge volume control solenoid valve, using the intake manifold va ...

    Power outlet
    Console Box The power outlet is for powering electrical accessories such as cellular telephones. It is rated at 12 volt, 120W (10A) maximum. The power outlet is powered only when the ignition switch is in the ACC or ON position. CAUTION The outlet and plug may be hot during or immedi ...

    Diagnosis system (audio unit)
    Diagnosis Description Self-diagnosis mode can perform the following items. Versions display Channel check diagnosis Key check diagnosis AV communication diagnosis VERSIONS DISPLAY FUNCTION Turn ignition switch ON. Turn the audio unit off. While pressing "1" button, turn volume ...

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