Data Parameters

When troubleshooting a malfunction, the ECM and BCM data display can be used to compare the vehicle with problems to a vehicle which is functioning property.


Following the trouble code displays, ECM will appear on CCP. With the ECM message displayed on the panel, depress the Hi button to access ECM data. Selection of the ``Data'' test type will result in the first available test being displayed. Four characters of the display will contain a test code to identify the selection. The first two characters are letters which identify the system and test type. The last two characters are numerals which identify the test itself (Example: ED01). Depressing the Hi button will display the next largest number for the selected test type, while depressing the Lo button will display the next smaller test number for the selected test. Depressing the Off button will stop the test selection process and return the display to the next available test type for the selected system (Example: ECM Inputs). The various data parameters and their values are shown.



A brief summary of each parameter is provided below:

EDO1 The Throttle Position Sensor (TPS) is displayed in degrees from -10 to 90.

ED02 The Manifold Air Pressure Sensor (MAP) is displayed in kilopascals (kPa) from 14 to 109.

ED03 The Computed Barometric pressure (BARO) is displayed in kilopascals (kPa) from 61 to 103.

ED04 The coolant temperature is displayed in degrees Celsius (°C) from -40° to 151°.

ED05 The Manifold Air Temperature Sensor (MAT) also called Air Temperature Sensor is displayed in degrees Celsius (°C) from -40 to 151.

ED06 The injector pulse width is displayed in milliseconds (ms), from 0 to 99.9.

ED07 The oxygen sensor voltage is displayed in volts from 0 to 1.14.

ED08 The spark advance is displayed in degees, from 0 to 52.

ED1O The battery voltage is read in volts, from 0 to 15.5.

ED11 The engine speed is displayed in RPM from 0 to 6370.

ED12 The vehicle speed is displayed in Miles Per Hour (MPH) from 0 to 159.

ED18 The oxygen sensor cross counts is displayed as the number of times the 02 sensor crossed the reference line each second.

ED19 The fuel integrator is displayed in counts, from 88 to 160.

ED26 The VCC temperature is displayed as a voltage level at the ECM. The normal range is from 0 to 5.12 volts.

ED70 The cruise servo position is displayed in percent (%) from 0 to 100. A valve close to 0% represents at rest position and valve close to 100% represents wide open throttle.

ED98 The ignition cycle counter value is the number of times the ignition has been cycled to "OFF" since an ECM trouble code was last detected. After 50 ignition cycles without any malfunction being detected, all stored ECM codes are cleared.

ED99 The ECM PROM I.D. is displayed as a number up to three digits long which can be used to verify that the proper PROM is installed in the ECM.