Nissan Altima 2007-2012 Service Manual: P1574 ASCD vehicle speed sensor

Description

The ECM receives two vehicle speed signals via CAN communication line. One is sent from combination meter, and the other is from TCM (Transmission control module). The ECM uses these signals for ASCD control.

Refer to EC-67, "System Description" for ASCD functions.

DTC Logic

DTC DETECTION LOGIC

NOTE:

    P1572 ASCD brake switch
    Description When the brake pedal is depressed, ASCD brake switch is turned OFF and stop lamp switch is turned ON. ECM detects the state of the brake pedal by this input of two kinds (ON/OFF si ...

    P1715 input speed sensor (primary speed sensor)
    Description ECM receives primary speed sensor signal from TCM through CAN communication line. ECM uses this signal for engine control. DTC Logic DTC DETECTION LOGIC NOTE: ...

    Other materials:

    Air cleaner
    QR25DE NOTE: The air cleaner filter should not be cleaned and reused. Replace the air cleaner filter according to the maintenance log shown in the “Warranty Information and Maintenance Booklet.” To remove the air cleaner filter: ● Unlatch the clips and move the air cleaner cover ...

    Refrigerant pressure sensor
    Description The refrigerant pressure sensor is installed at the condenser of the air conditioner system. The sensor uses an electrostatic volume pressure transducer to convert refrigerant pressure to voltage. The voltage signal is sent to ECM, and ECM controls cooling fan system. Component ...

    Controls
    Fan control dial The fan control dial turns the fan on and off, and controls fan speed. Air flow control buttons The air flow control buttons allow you to select the air flow outlets. MAX A/C -  Air flows from center and side vents with maximum cooling. - Air flows from center and s ...