Driver/Vehicle Information Display: Description and Operation

DESCRIPTION
The system scanner takes inputs from the lamp out module, washer fluid level, oil level, and door ajar sensors and displays the appropriate diagnostic message. The engine coolant temperature electronic gauge is also included in the system scanner display. Based on the inputs from the various sensors, the system scanner will display the following messages:
- NORMAL
- DOOR AJAR
- HEADLAMP OUT
- REAR LAMP OUT
- WASHER FLUID
- CHECK OIL

OPERATION
When a warning condition first occurs, the diagnostic message is displayed accompanied by a one-second tone. The message will remain on the display as long as it is active, but no further tones are issued. If more than one warning condition occurs, each message will be displayed simultaneously. When the message first appears it will be accompanied by a one second tone.

NORMAL
If no system faults are present at power up, the display will indicate NORMAL for five seconds following prove out before blanking. If a fault is present, the appropriate message is displayed immediately following prove out.

CHECK OIL
The Check Oil signal comes from the oil level sensor in the oil pan. The Check Oil message is illuminated when the oil level is low. Refer to Section 33-40 for information on the low oil level indicator

DOOR AJAR
The door ajar signal comes from switches located in the door jamb. When any door is open, the appropriate wire to the system scanner will be grounded and the words DOOR AJAR will appear on the scanner display. The message will be cleared from the display when the warning condition is removed (the door is closed).

HEAD/REAR LAMP OUT
The signals which indicate headlamp out, rear lamp out, and high-mount stoplamp out all come from the lamp out module. Headlamp out and rear lamp out can only be sensed when the headlamp switch is in the ON position. If one of the headlamps or rear lamps are out and the headlamp switch is ON, the appropriate wire to the system scanner will be grounded and the words HEADLAMP OUT or REAR LAMP OUT will appear on the display. Once the message appears on the display it will remain on the display until the ignition switch is turned to the OFF position.

Rear lamp out can only be sensed when the brake pedal is depressed. If the rear lamp is out and the brake pedal is depressed, the rear lamp out wire to the system scanner will be grounded and the words REAR LAMP OUT will appear on the display. Once the message appears on the display it will remain on the display (possibly alternating with another warning) until the ignition is switched back to the OFF position.

WASHER FLUID LOW
The low washer fluid level signal comes from a switch located in the washer fluid reservoir. When the washer fluid level is low and the washer/wiper switch is activated, the wire to the system scanner will be pulled high and the words WASHER FLUID LOW will appear on the display. The message will remain displayed until key off.