Oldsmobile Toronado

Selection of DATA , INPUTS , or OUTPUTS test types will result in the first available test being displayed. If the message, EEEE appears it means that test is not allowed with the engine running. Turn engine off and repeat sequence. See Fig 1 .

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 ), while the last 2 characters numerically identify the test. When selecting a specific test there are 3 available actions to be taken:

• 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.
• Pressing the HI fan button will display the next larger test number for the selected test type.

Upon selection of 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 the 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. Pressing the WARM button increases the value while pressing the COOL button decreases the value. Normal program control can be resumed in 1 of 3 ways.

• Selection of another override test will cancel the current override.
• Selection of another system (i.e. ECM, BCM) 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 again alternate.

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.