TEST SELECTION
Selection of the "DATA", "INPUTS", or "OUTPUTS" test types will result in the first available test being displayed. If "==" message appears, this test is not allowed with the engine running. Turn engine off and repeat sequence.
The last 4 characters of the display will contain a test code to identify the selection. The first 2 of these characters are letters which identify the system and the test type (i.e. ED for ECM DATA) and last 2 characters numerically identify the test (i.e. ED01 for Throttle Position). When selecting a specific, the following actions may be taken to control the display
- Pressing the "OFF" button will stop the test selection process and return the display to the next available test type for the selected system.
- Pressing the "LOW" fan button will display the next smaller test number for the selected test type. If this button is touched with the lowest test number displayed, the highest test number will then appear.
- Pressing the "HI" fan button will display the next larger test number for the selected test type. If this pad is touched with the highest test number displayed, the lowest test number will then appear.
Upon selecting an "OVERRIDE" test function, current operation will be represented as a percentage of its full range. This value will be displayed on the ECC panel. The display will alternate between "-" and the normal program value. This alternating display is a reminder that function is not currently being overridden.
Pressing the "WARM" or "COOL" buttons on the ECC panel begins the override, at which time the display will no longer alternate to "-". Pressing the "WARM" button increases the value, while pressing the "COOL" button decreases the value. Normal program control can be resumed in one of 3 ways.
- Selection of another override test will cancel the current override.
- Selection of another system (ECM, BCM or IPC) will cancel the current override.
- Overriding the value beyond either extreme (0 or 99) will display "-" momentarily and then jump to the opposite extreme. If the button is released while "-" is being displayed, normal program control will resume and the display will begin alternating.
The override test type is unique in that any other test type within the selected system may be active at the same time. After selecting an override test, pressing the "OFF" button will allow selection of another test type (DATA, INPUTS or OUTPUTS). The ECC panel will continue to display the selected override. By selecting another test type and test, while at the same time pressing the "WARM" or "COOL" button, it is possible to monitor the effect of the override on different vehicle parameters.
