Question about 1999 Saturn SL

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1999 saturn base model starting problem. Turn the key and no noise. Headlights and dashlights work but not interior or radio. Tried jumping and after several key turns the radio came on and it started. But then died a few seconds later. Would not start again. Please help.

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  • fnewman1995 Nov 13, 2010

    I understand the dynamics of a charging system and i don't believe that this is a battery problem. There is no effort at all when trying to jump a car and then all of a sudden it will turn over and then die within a few seconds and won't start again. I have been reading about a CKP sensor or perhapes the starter. What do you think?

  • fnewman1995 Nov 13, 2010

    Ok the car started after a few key turns and some tapping on interior box fuses. The ***** thing is that only certain accesories work prior to starting. The door locks, radio, and interior lights would not work. Headlights, dashlights, wipers did work prior to starting. After starting everything worked. All i did was turn the key a few times and in blind fustration i tapped on the interior fuses by the passenger feet area. What do ya think?



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The battery and charging subsystem consists of a battery and a generator with a built in regulator and integral fluid intrusion shield. The system also includes the Powertrain Control Module (PCM ) software to increase idle speed during low voltage conditions. The battery supplies current to the starter to crank the engine during starting. After the engine starts, the charging system recharges the battery and supplies power to various electrical devices in the vehicle. The PCM monitors battery voltage and will increase idle speed if battery voltage drops below a calibrated amount.
With that said Batteries usually last three years so if yours is older then that then it could be time, also a weak charging system will kill a battery really fast. I recommend that you take the battery to local Napa or Autozone and have the battery tested if it comes back no good replace then after you get it running take to car somewhere to confirm your charging system is in proper running order usually some parts stores can test that also.

Hope this helps

Posted on Nov 13, 2010

  • Dak408
    Dak408 Nov 13, 2010

    CKP sensor sounds interesting

    Here is some information I have

    The PCM receives signals from the crankshaft position
    sensor to determine the position of the engine at various degrees of rotation.

    The EI module does not receive a signal from the crankshaft position
    (CKP) sensor. Instead the CPK sensor signal is being received and
    processed by the PCM. The EI module does, however, contain circuitry to
    determine camshaft position without using a camshaft sensor, by use of
    compression sense ignition (CSI). The CSI circuitry makes use of the
    characteristics of a waste spark ignition system, while monitoring a sequence of
    spark plug gap breakdown events. Capacitive pickup plates located under the 1/4
    coil are used to determine whether #1 or #4 fired on a compression stroke. This
    capacitive sensing device is similar to inductive pickups used on engine
    analyzers and oscilloscopes.
    Crankshaft rotation initiates CKP pulses. With sensor
    connected to PCM, any valid CKP pulses will initiate reference

    Crankshaft Position Sensor-Positive
    The crankshaft
    position (CKP) sensor positive line is tied to the positive connection of the
    polarized variable reluctance crankshaft position sensor. The peak positive
    voltage depends on engine rpm, and ranges from 300 millivolts to 125

    The CKP signal defines engine position. A CKP pulse occurs at each
    TDC, at 60 degrees after top dead center (ATDC), and at 120 degrees ATDC. A
    seventh pulse referred to as the sync pulse, occurs at 70 degrees ATDC of
    cylinder #1.

    Crankshaft Position Sensor-Negative
    The CKP
    negative line is tied to the negative connection of the polarized variable
    reluctance crankshaft position sensor. The peak negative voltage depends on
    engine rpm and ranges from -250 millivolts to -120 volts.


    If engine stalls, CKP pulses stop due to lack of engine rotation.
    Within 500 milliseconds after the last CKP pulse, any charged coils are fired.
    No more firing events will occur until engine rotation resumes. If an engine
    stall occurs where reference pulses are not received after the engine was
    running and the ignition volts indicate the ignition was not turned Off, an DTC
    P1599 will set.

    the part is 33.00 dollars

  • Dak408
    Dak408 Nov 13, 2010

    got me on that one



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