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Home >> Cadillac >> 1982 >> Seville 4.1L Eng VIN 4 >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> DFI Control System >> Diagnostic Procedure >> Engine Data Display Procedure
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Engine Data Display Procedure

  1. Enter diagnostics and with code ".7.0" displayed, press "RESET" button on Fuel Data panel. Code ".9.0" should appear. If code ".9.0" does not appear, refer to switch test code ".7.9".
  2. Engine data display shows values of 13 parameters monitored by ECM. Parameter numbers (.0.1-.1.3) will be displayed for 1 second on ECC panel, followed by a numerical value. The parameter value will be displayed for 9 seconds. Each parameter and value will be repeated until manually advanced to the next parameter.
  3. To advance display, press "INSTANT/AVERAGE" button on Fuel Data panel. To return to a previously displayed parameter, press the "RESET" button on Fuel Data panel. After last parameter is displayed, code ".9.5" should appear. Engine data display may be cleared at any time by pressing "OFF" and "HIGH" buttons on the ECC panel, simultaneously. Code ".7.0" should appear.
  4. Engine data display information can be used to compare information of engine to that of properly functioning engine for diagnosis of malfunctions. Parameters read and values displayed are as follows:
    • .0.1 - Throttle angle displayed in degrees.
    • .0.2 - MAP value displayed in Kilopascals (kPa).
    • .0.3 - BARO value displayed in kPa.
    • .0.4 - Coolant temperature in °C.
    • .0.5 - Manifold air temperature in °C.
    • .0.6 - Injector pulse width in milliseconds.
    • .0.7 - Oxygen sensor voltage in volts.
    • .0.8 - Spark advance in degrees.
    • .0.9 - Ignition cycles since a trouble code was last set.
    • .1.0 - Battery voltage in volts.
    • .1.1 - Engine RPM divided by 10. Engine speed over 2000 RPM is displayed as "199" since this is the highest number the ECC can display.
    • .1.2 - Vehicle speed in MPH.
    • .1.3 - PROM identification number. To ensure that the correct PROMs are installed.
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