DTC P1639 5 Volt Reference 2 Circuit

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    Circuit Description

    The PCM uses the 5 Volt Reference B circuit as a sensor feed for the A/C Refrigerant Pressure Sensor. The PCM monitors the voltage on the 5 Volt Reference B circuit. If the voltage is out of tolerance, the PCM will set DTC P1639.

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    Service Manual Table of Contents

    Document Tags

    Document Title: DTC P1639 5 Volt Reference 2 Circuit

    circuit

    volt

    reference

    sensor

    refrigerant

    pressure

    voltage

    condition

    action

    records

    data

    clear

    using

    scan

    tool

    info

    diagnostic

    check

    inspect

    harness

    wiring

    vehicle

    test

    powertrain

    replacement

    value

    system

    problem

    found

    ignition

    switch

    disconnect

    ground

    specified

    indicated

    short

    repair

    procedures

    electrical

    diagnosis

    reference circuit

    pressure sensor

    specified value

    value indicated

    volt reference circuit

    refrigerant pressure sensor

    voltage volt reference

    powertrain control module

    control module replacement

    module replacement programming

    powertrain board diagnostic

    turn ignition switch

    voltage greater specified

    greater specified value

    specified value indicated

    check volt reference

    reference circuit short

    problem found repair

    found repair repair

    repair repair procedures

    diagnosis problem found