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Home >> Buick >> 1993 >> Riviera >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - Pcm/BCM >> Self-Diagnostic System >> Data Display Codes >> ECM Data Parameters:
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ECM Data Parameters:

  1. ED01

    Throttle position displayed in volts from 0 to 5.10.

  2. ED04

    Coolant temperature displayed in degrees Celsius (°C) from -40 to 151.

  3. ED06

    Injector pulse width displayed in milliseconds (ms) from 0 to 1002.

  4. ED07

    Oxygen sensor voltage displayed in volts from 0 to 1.128.

  5. ED08

    Spark advance displayed in degrees from 0 to 70, similar to engine timing in degrees.

  6. ED10

    Battery voltage displayed in volts from 0 to 25.5.

  7. ED11

    Engine speed displayed in RPM from 0 to 6375. (May display 20 with ignition on and engine off).

  8. ED12

    Vehicle speed displayed in MPH from 0 to 159.

  9. ED16

    Knock retard displayed in degrees of timing pulled out from 0 to 45.

  10. ED17

    Knock sensor activity displayed as counts, an arbitrary number that increases from 0 to 255 according to amount of activity from knock sensor.

  11. ED18

    Oxygen sensor cross counts displayed as number of times O2 sensor voltage crossed .45-volt reference each second.

  12. ED19

    Fuel integrator displayed in counts from 0 to 255.

  13. ED20

    Block learn multiplier displayed in counts from 0 to 255.

  14. ED21

    Mass airflow sensor displayed in grams per second of air flow from 0 to 255.

  15. ED22

    Idle air control displayed in steps of travel from 0 to 255.

  16. ED23

    Manifold air temperature displayed in degrees Celsius (°C) from -40 to 151.

  17. ED24

    Command RPM for idle speed displayed in RPM from 500 to 2000.

  18. ED25

    Canister purge delay displayed in percent from zero to 100.

  19. ED26

    Air/fuel ratio is displayed in percent from 6 to 18.

  20. ED27

    Weak cylinder display indicates the number of the weak cylinder.

  21. ED28

    Cruise servo position displayed in percent from zero to 100.

  22. ED29

    Cruise set speed displayed in KPH from 20 to 120.

  23. ED30

    Torque converter clutch duty cycle displayed in percent from zero to 100. Zero indicates clutch is not engaged.

  24. ED31

    PRNDL status displayed in a 4-digit binary number as follows:
    1. P = 0110
    2. R = 0011
    3. N = 1010
    4. D = 1001
    5. D = 0000
    6. 2 = 0101
    7. 1 = 1100

  25. ED98

    Ignition cycle counter value displays number of times the ignition has been cycled to OFF since ECM trouble code was last detected. After 50 ignition cycles without any malfunctions being detected, all stored ECM codes are cleared.

  26. ED99

    ECM PROM ID displayed as number up to 4 digits long which can be used to identify MEM-CAL/PROM installed in ECM.
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