Override Displays: Notes

When trouble shooting a malfunction, the override feature allows testing of certain system functions regardless of normal program instructions. Upon selecting a test that functions, that selection's current operation will be represented as a percentage of its full range. This value will be displayed on the CCDIC panel.

The display will alternate between "--" for one second, followed by the normal program value for 10 seconds. This alternating display is a reminder that function is not currently being overridden.

Pressing the "WARMER" or "COOLER" buttons on the CCDIC begins the override, at which time the display will no longer alternate to "--". When in override, pressing the "WARMER" button increases the value, while pressing the "COOLER" button decreases the value.

Upon release of button, the display may remain in either the override value or return to normal program control. If display remains at the override 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 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 activated at the same time. After selecting an override test, pressing the "OFF" button will allow selection of another test type, yet the CCDIC will continue to display the selected override. By selecting another test type, while at the same time pressing the "WARMER" or "COOLER" buttons, it is possible to monitor the effect of the override on different vehicle parameters.