Check Control

Check Control

1992 - 1998 E36 4 door/Coupe/Convertible/M3
The Check Control is an active warning system that displays various lighting circuit failures and low fluid level warnings. It is only available on the listed models if they are equipped with the Multi-Function Clock or On-board Computer. Failure warnings are displayed in the matrix of the LCD panel on these units.







The complete system consists of the following components:
- Check Control Module - located below the left side of the instrument panel. The module processes the inputs from the monitored components.
- Check Control display - located in the matrix of the BC or Multi-function clock.
- Check waring lamp located in the instrument cluster.
- Monitored lamps and fluid reservoirs.







The following circuits are monitored by the check control system:
- Windshield washer fluid
- Low beam headlights
- Brake light circuit - including brake light switch
- Coolant level
- Tail lights
- License plate lights

The lighting circuits are warm monitored only - a fault will only be detected when the circuit is on. If a fault occurs in one of the monitored circuits, the check control will post the warning in the 20 digit matrix display and the check warning lamp will illuminate in the cluster depending on the priority of the failure.

CHECK CONTROL MESSAGE PRIORITIES
There are three priority fault displays in the check control system

PRIORITY 1: The brake light circuit is the only priority 1 fault display.




A failure of the brake light stepping one the brake pedal.

The warning triangles in the display will flash and the check warning lamp in the cluster will also flash for 20 seconds, then remain on steady. pressing the check button on the matrix panel will cancel the display for 5 seconds and then it will reappear in the display.

PRIORITY 2: These failures will appear in the display as soon as they occur. The warning triangles will illuminate steady and the check lamp in the cluster will also illuminate.

Priority 2 failures are only posted for 20 seconds and then are canceled. The warning triangles remain illuminated and the failure message can be recalled by pressing the check button.




The following circuits are priority 2 displays:
- One brake light bulb
- Low beam headlights
- Tail lights
- License plate lights Washer fluid

PRIORITY 3: Low Coolant Level is the only priority three display. This condition will not be displayed while driving.




The warning is also posted for 20 seconds when the ignition is switched on, however the condition is held in memory until the problem is corrected. The low coolant level display can also be recalled at any time by pressing the check control button.