Nissan Maxima Service and Repair Manual: Combination switch reading system

System Diagram

Nissan Maxima. System Diagram

System Description

OUTLINE

  • BCM reads the status of the combination switch (light, turn signal, wiper and washer) and recognizes the status of each switch.
  • BCM has a combination of 5 output terminals (OUTPUT 1 - 5) and 5 input terminals (INPUT 1 - 5) and reads a maximum of 20 switch states.

COMBINATION SWITCH MATRIX

Nissan Maxima. COMBINATION SWITCH MATRIX

Combination switch INPUT-OUTPUT system list

Nissan Maxima. Combination switch INPUT-OUTPUT system list

Nissan Maxima. Combination switch INPUT-OUTPUT system list

COMBINATION SWITCH READING FUNCTION

Description

  • BCM reads the status of the combination switch at 10ms intervals normally.

Nissan Maxima. COMBINATION SWITCH READING FUNCTION

NOTE: BCM reads the status of the combination switch at 60ms intervals when BCM is controlled at low power consumption mode.

  • BCM operates as follows and judges the status of the combination switch.
  • It operates the transistor on OUTPUT side in the following order: OUTPUT 1 → 2 →3 →4 →5 and outputs voltage waveform.
  • The voltage waveform of OUTPUT corresponding to the formed circuit is input into the interface on INPUT side if any (1 or more) switches are ON.
  • It reads this change of the voltage as the status signal of the combination switch.

Nissan Maxima. COMBINATION SWITCH READING FUNCTION

Operation Example

In the following operation example, the combination of the status signals of the combination switch is replaced as follows: INPUT 1 - 5 to "1 - 5" and OUTPUT 1 - 5 to "A - E ".

Example 1: When a switch (TAIL LAMP) is turned ON

  • The circuit between OUTPUT 4 and INPUT 5 is formed when the TAIL LAMP is turned ON.

Nissan Maxima. Operation Example

  • BCM detects the combination switch status signal "5D" when the signal of OUTPUT 4 is input to INPUT 5.
  • BCM judges that the TAIL LAMP switch is ON when the signal "5D" is detected.

Example 2: When some switches (TRUN RH, TAIL LAMP) are turned ON

  • The circuits between OUTPUT 1 and INPUT 5 and between OUTPUT 4 and INPUT 5 are formed when the TURN RH switch and TAIL LAMP switch are turned ON.

Nissan Maxima. Operation Example

  • BCM detects the combination switch status signal "5AD" when the signals of OUTPUT 1 and OUTPUT 4 are input to INPUT 5.
  • BCM judges that the TURN RH switch and TAIL LAMP switch are ON when the signal "5AD" is detected.

WIPER INTERMITTENT DIAL POSITION SETTING (FRONT WIPER INTERMITTENT OPERATION)

BCM judges the wiper intermittent dial 1 - 7 by the status of INT VOLUME 1, 2, and 3 switches.

Nissan Maxima. WIPER INTERMITTENT DIAL POSITION SETTING (FRONT WIPER INTERMITTENT OPERATION)

    Body control system
    System Description OUTLINE ECU DIAGNOSIS INFORMATION controls the various electrical components. It inputs the information required to the control from CAN communication and the signal rece ...

    Signal buffer system
    System Diagram System Description OUTLINE BCM has the signal transmission function that outputs/transmits each input/received signal to each unit. Signal transmission function list ...

    Other materials:

    Outside mirrors
    The outside mirror remote control will operate only when the ignition switch is in the ACC or ON position. Move the small switch 1 to select the right or left mirror. Adjust each mirror to the desired position using the large switch 2 . WARNING Objects viewed in the outside mirror on ...

    Troubleshooting guide
    Verify the location of all Intelligent Keys that are programmed for the vehicle. If another Intelligent Key is in range or inside the vehicle, the vehicle system may respond differently than expected. Symptom Possible Cause Remedy When pushing the ignition switch to sto ...

    Tel antenna
    Removal and Instalation REMOVAL Disconnect the battery negative terminal. Refer to PG-67, "Removal and Installation (Battery)". Remove the rear parcel shelf finisher. Refer to INT-28, "Removal and Installation". Remove the Bluetooth antenna screw (A). Detach the Bluetooth anten ...

    Nissan Maxima Owners Manual

    Nissan Maxima Service and Repair Manual

    © 2017-2024 Copyright www.nimainfo.com
    0.0071