Powertrain Control Module Controlled Tachometer Diagnosis

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    Circuit Description

    The PCM supplies the ground to energize the Instrument Cluster tachometer. When the ignition switch is first turned on the PCM grounds the tachometer circuit. The circuit will remain grounded until the PCM receives the first 24X reference...

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    Service Manual Table of Contents

    Document Tags

    Document Title: Powertrain Control Module Controlled Tachometer Diagnosis

    circuit

    ground

    instrument

    cluster

    tachometer

    ignition

    switch

    reference

    pulse

    diagnostic

    electrical

    diagnosis

    check

    following

    poor

    connection

    harness

    terminal

    disconnect

    control

    connector

    voltage

    test

    feed

    short

    condition

    current

    faulty

    camshaft

    position

    powertrain

    replacement

    action

    value

    system

    measure

    specified

    locate

    repair

    procedures

    complete

    fuse

    replace

    open

    problem

    found

    light

    sensor

    tachometer control

    control circuit

    ignition feed

    cluster diagnosis

    diagnosis electrical

    measure voltage

    ground voltage

    voltage specified

    specified value

    disconnect instrument

    action complete

    feed circuit

    check tachometer

    test light

    position sensor

    tachometer control circuit

    output driver circuit

    powertrain control module

    control module replacement

    module replacement programming

    instrument cluster diagnosis

    cluster diagnosis electrical

    powertrain board diagnostic

    turn ignition switch

    ground voltage specified

    voltage specified value

    disconnect instrument cluster

    voltage tachometer control

    repair procedures electrical

    diagnosis action complete

    locate repair following

    condition short ground

    ignition feed circuit

    feed circuit instrument

    circuit instrument cluster

    check tachometer control

    circuit poor connection

    problem found replace

    found replace faulty

    replace faulty terminal

    camshaft position sensor