Pre-Drive Check

The pre-drive check serves as:

• A check of internal functions in the instrument cluster
• Monitoring of the live signals from all control units that may emit Check-Control messages

During the pre-drive check, the most important indicator and warning lights are activated for 4 seconds when terminal 15 is switched ON. Exception: Indicator and warning lights for airbags actuated when terminal R is switched ON.

The following indicator and warning lights are activated in the pre-drive check:

• Seat-belt warning
• Airbag (initially yellow, then red)
• Anti-lock brake system (ABS)
• General brake warning light (initially yellow, then red)
• Emission warning lamp
• Dynamic Stability Control (DSC)
• Active Front Steering
• ACC control by driver or object detected (initially yellow, then red)

Once a pre-drive check completes successfully, all indicator and warning lights are switched off. If a fault occurs during the pre-drive check, the check is interrupted for the system in question. The indicator and warning lights for this system remain on. The Check-Control system issues the appropriate message.