Data Parameters

Fig. 4 ECM data display chart:

When troubleshooting a system malfunction, the data display can be used to compare the vehicle being serviced to a vehicle which is operating normally.
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 in Fig. 4.